VIESMANN VITOCAL 300-G Brine/water and water/water heat pump Single and two-stage, from 21 kw

Transcription

1 VIESMANN VITOCAL 00-G Brine/water and water/water heat pump Single and two-stage, from 21 kw Technical guide Heat pump with electric drive for DHW and central heating in mono-mode or dual mode heating systems. VITOCAL 00-G Type BW/BWS, WW Type BW/BWS: Brine/water heat pump, 21.2 to 42.8 kw. Type WW: Water/water heat pump, 28.1 to 57.4 kw. Type BW/WW: For single stage operation or operation at stage 1 of a twostage heat pump. Type BWS: As stage 2 of a two-stage heat pump for increased output in conjunction with type BW/WW. Highly flexible due to combination with modules of different output. Easier handling through small and light modules. 2/2010

2 Index Index 1. Vitocal 00-G 1. 1 Product description... 4 Benefits of type BW/BWS, WW... 4 Delivered condition Specification... 5 Specification... 5 Dimensions of type BW/BWS, WW... 7 Output diagrams Installation accessories 2. 1 Primary circuit Sensor well set, primary circuit Brine circuit pressure switch Brine accessory pack Primary pump Brine distributor for geothermal collectors... 1 Brine distributor for geothermal probes/geothermal collectors Heat transfer medium Tyfocor Filling station Secondary circuit Secondary pump Safety equipment block Cooling Contact humidistat Natural cooling extension kit way motorised ball valve (DN 2) Three-way diverter valve (R 1¼) Room temperature sensor Frost stat Fan convectors Vitoclima 200-C DHW heating via an external heat exchanger way motorised ball valve (DN 2) Cylinder primary pump Design information. 1 Power supply and tariffs Application procedure Positioning requirements Minimum clearances... 2 Min. space requirement... 2 Electrical connections Hydraulic connections Connections on the primary side brine/water (stages 1 and 2) Connections on the primary side water/water (stages 1 and 2) Connections on secondary side for two-stage heat pumps System versions Sizing the heat pump... 4 Mono-mode operation... 4 Mono-energetic operation... 5 Dual mode operation... 5 Supplement for DHW heating... 5 Supplement for setback mode Heat source for brine/water heat pumps... 6 Frost protection... 6 Geothermal collector... 6 Geothermal probe... 9 Expansion vessel for primary circuit Pipework, primary circuit Pump output supplements (percentage) for operation with Tyfocor Heat source for water/water heat pumps... 4 Groundwater... 4 Calculating the required groundwater volume Permits for a groundwater/water heat pump system Sizing the heat exchanger, primary circuit/separating heat exchanger Cooling water Central heating/central cooling Heating circuit Heating circuit and heat distribution Cooling operation VIESMANN VITOCAL 00-G

3 Index (cont.). 9 Systems with heating water buffer cylinder Heating water buffer cylinder operated in parallel Heating water buffer cylinder for optimised runtimes Heating water buffer cylinder for bridging periods when the supply is blocked Water quality Heating water DHW heating DHW connection Function description regarding DHW heating Hydraulic connection, primary store system Cooling operation... 5 Types and configuration... 5 Cooling function Natural cooling... 5 Hydraulic connection, natural cooling function Swimming pool water heating Hydraulic connection, swimming pool Sizing the plate heat exchanger Connection of solar thermal systems Sizing the solar expansion vessel Heat pump control unit 4. 1 Vitotronic 200, type WO1A Structure and functions Time switch Setting the operating programs Frost protection function Heating and cooling curve settings (slope and level) Heating systems with heating water buffer cylinder or low loss header Outside temperature sensor Specification Vitotronic 200, type WO1A Control unit accessories Contactor relay Contact temperature sensor as system flow temperature sensor... 6 Cylinder temperature sensor... 6 Thermostat for controlling the swimming pool temperature... 6 Contact temperature sensor... 6 Mixer motor Extension kit for one heating circuit with mixer with integral mixer motor Extension kit for one heating circuit with mixer for separate mixer motor Immersion thermostat Contact thermostat Vitotrol 200A Room temperature sensor for separate cooling circuit KM BUS distributor External extension H Vitocom 100, type GSM Vitocom 00, type FA5, FI2, GP LON communication module LON connecting cable for data exchange between control units Extension of the connecting cable Terminator Keyword index VITOCAL 00-G VIESMANN

4 1 Vitocal 00-G 1.1 Product description Heat pumps with electric drive for DHW and central heating in monomode, mono-energetic or dual mode operation. The brine/water heat pumps extract heat from the ground with the help of geothermal collectors or probes. The ground provides almost completely stable temperatures all the year round, enabling the heat pumps to operate virtually independently of the outside temperature. They can cover the entire heat demand of a building, even on colder days. Benefits of type BW/BWS, WW The water/water heat pumps with delivery and return wells gain heat from the groundwater which offers stable temperatures, enabling the heat pumps to achieve constantly high COPs. Consequently they are suitable for year round heating operation and DHW provision. A Hermetically sealed Compliant scroll compressor B Condenser C Evaporator D Only type BW/WW: Weather-compensated, digital heat pump control unit Vitotronic 200, type WO1A Mono-mode for central and DHW heating. Menu-guided heat pump control unit Vitotronic 200, type WO1A, for weather-compensated heating mode. Max. flow temperature of 60 C for high DHW convenience and ideal for modernising an existing radiator heating system. High COP to EN 14511: up to 4.8 (brine 0 C/water 5 C). Low operating costs with the highest efficiency at every operating point through the innovative RCD (Refrigerant Cycle Diagnostic) system with electronic expansion valve. Especially suitable for low heating system temperatures, e.g. underfloor heating. Highly flexible due to combination with modules of different output. Low noise and vibration emissions through -D sound concept Convenient for applying for subsidies: with integral energy statement. Easier handling through small and light modules. Higher output can be achieved through cascade arrangement: 21.2 to 42.4 kw Type BWS: As stage 2 of a two-stage heat pump for increased output in conjunction with type BW and WW. Delivered condition Type BW Compact heat pump design (with soft starter). Epoxy-coated casing. CFC-free, non-combustible refrigerant R 410A (refrigerant mixture, comprising 50 % R 2 and 50 % R 125). Evaporator and condenser made from copper-soldered stainless steel plate heat exchanger (1.4401), for the heating circuit and brine/ groundwater circuit. Electronic expansion valve and patented refrigerant distribution. New refrigerant RCD (Refrigerant Cycle Diagnostic) circuit diagnostic system. Outside temperature sensor, flow and return temperature sensors plus sensors for the primary circuit flow and return. With fitted weather-compensated digital heat pump control unit Vitotronic 200, type WO1A Type WW Heat pump type BW Water/water heat pump conversion kit (frost stat for primary circuit and flow limiter for well circuit) Type BWS Heat pump type BW without heat pump control unit 4 VIESMANN VITOCAL 00-G

5 Vitocal 00-G (cont.) 1.2 Specification Specification Type BW/BWS BW/BWS Output data to DIN EN (0/5 C, 5 K spread) Rated heating output kw Refrigerating capacity kw Power consumption kw Coefficient of performance (COP) Output data to DIN EN 255 (0/5 C, 10 K spread) Rated heating output kw Refrigerating capacity kw Power consumption kw Coefficient of performance (COP) Brine (primary circuit) Content l Min. flow rate (Δt = 5 K) l/h Pressure drop mbar Max. flow temperature C Min. flow temperature C Heating water (secondary circuit) Content l Min. flow rate (Δt = 10 K) l/h Pressure drop mbar Max. flow temperature C Type WW WW Output data to DIN EN (10/5 C, 5 K spread) Rated heating output kw Refrigerating capacity kw Power consumption kw Coefficient of performance (COP) Brine (primary circuit) Content l Min. flow rate (Δt = 4 K) l/h Pressure drop mbar Max. inlet temperature C Min. inlet temperature C Heating water (secondary circuit) Content l Min. flow rate (Δt = 10 K) l/h Pressure drop mbar Max. flow temperature C Type BW/BWS, WW BW/BWS, WW Rated voltage, heat pump compressor stage 2 (type BWS) V /PE 400 V/50 Hz Rated current, compressor A Starting current, compressor (with starting current limiter) A < Starting current, compressor with stalled armature A Compressor fuse A 1xC16A -pole 1xC25A -pole 1xC40A -pole Rated voltage control unit/pcb V 1/N/PE 20 V/50 Hz Fuse protection, control unit/pcb 1xB16A Fuse, control unit/pcb A 6. A (slow) /250 V Rated capacity, control unit/pcb W Max. electr. power consumption, control unit/electronics, W heat pump stage 1 (type BW/WW) Max. electr. power consumption, control unit/pcb, heat pump stage 2 (type BWS) Electr. power consumption, control unit/electronics, stages 1 W and 2 Protection class I I I IP rating IP 20 IP 20 IP 20 VITOCAL 00-G VIESMANN 5

6 Vitocal 00-G (cont.) 1 BW/BWS, WW Refrigerant circuit Refrigerant R 410 A Fill volume kg Compressor Type Hermetically sealed scroll compressor Permiss. operating pressure, high pressure side bar Permiss. operating pressure, low pressure side bar Permiss. operating pressure Primary circuit bar Secondary circuit bar Dimensions Total length mm Total width mm Total height (with open control unit) mm Connections Primary flow and return G Heating flow and return G Weight Heat pump stage 1 (type BW/WW) kg Heat pump stage 2 (type BWS) kg Sound power level at 0/5 C (test with reference to DIN EN ISO ) db(a) VIESMANN VITOCAL 00-G

7 Vitocal 00-G (cont.) Dimensions of type BW/BWS, WW < 42 V 20 V 400 V < 42 V 20 V 400 V = Type BWS on the left; type BW/WW on the right VITOCAL 00-G VIESMANN 7

8 Vitocal 00-G (cont.) Output diagrams 1 Type D E F G D E F G A Heating output B Refrigerating capacity C Power consumption D T HV = 5 C E T HV = 45 C F T HV = 55 C G T HV = 60 C T HV Heating circuit flow temperature Data for the COP was calculated with reference to DIN EN A 15 Output in kw Ɛ Coefficient of performance (COP) B 10 C Water or brine temperature in C Water or brine temperature in C G F E D 15 D E F G 15 8 VIESMANN VITOCAL 00-G

9 Vitocal 00-G (cont.) Type D E F G D E F A Heating output B Refrigerating capacity C Power consumption D T HV = 5 C E T HV = 45 C F T HV = 55 C G T HV = 60 C T HV Heating circuit flow temperature Data for the COP was calculated with reference to DIN EN G 25 A 20 B 15 Output in kw Ɛ Coefficient of performance (COP) 10 C Water or brine temperature in C Water or brine temperature in C G F E D 15 D E F G 15 VITOCAL 00-G VIESMANN 9

10 Vitocal 00-G (cont.) Type D E F G D E F G A Heating output B Refrigerating capacity C Power consumption D T HV = 5 C E T HV = 45 C F T HV = 55 C G T HV = 60 C T HV Heating circuit flow temperature Data for the COP was calculated with reference to DIN EN A 0 Output in kw Coefficient of performance ε (COP) B 20 C Water or brine temperature in C Water or brine temperature in C G F E D 15 D E F G VIESMANN VITOCAL 00-G

11 Installation accessories 2.1 Primary circuit Sensor well set, primary circuit Part no For on-site primary circuit pipework. Brine circuit pressure switch Part no Cannot be used in conjunction with potassium carbonate-based heat transfer medium. Components: Pipe with connection R1¼ (2 pce) Sensor well for temperature sensors (flow and return) The temperature sensors are included in the standard delivery of the heat pump. 2 Brine accessory pack Only for single stage heat pump type BW 121 and BW 129. For systems with a brine circuit pump (primary pump) in the brine return. Suitable for Viessmann heat transfer medium "Tyfocor" based on ethylene glycol (see chapter "Heat transfer medium"). Brine accessory pack for single and two-stage heat pumps, thermally insulated with vapour diffusion-proof material. Components: Air separator Safety valve ( bar) Pressure gauge Drain & fill valves (2 pce) Fittings for installing the primary pump Shut-off valves Wall mounting bracket Thermal insulation (vapour diffusion-proof) Expansion vessel Subject to part no., with or without circulation pump Heat pump type BW 121 BW 129 BW 145 Expansion vessel 5 l 50 l on-site Part no. for brine accessory pack Without circulation pump Z Z on-site (Connection set for on-site circulation pump G 2) With Wilo high efficiency Z circulation pump, type Stratos Para ( - 11 m), 20 V~ (Connection set for on-site circulation pump G 1½) With Wilo standard circulation pump: Type TOP S 0/7, Z V~ (Connection set for onsite circulation pump G 2) Type TOP S 0/10, 400 V~ (Connection set for onsite circulation pump G 2) Z Circulation pump curves See chapter "Primary pump". VITOCAL 00-G VIESMANN 11

12 Installation accessories (cont.) E D 2 F G 1¼ G 1¼ H 60 C G B B G 1¼ N B A 192 G 1¼ 192 K M L C A Primary circuit flow (heat pump brine inlet) B Ball valve C Drain & fill valve D Pressure switch connection E Air separator F Primary circuit flow (brine inlet, brine accessory pack) G Pressure gauge H Safety valve ( bar) K Primary circuit return (brine outlet, brine accessory pack) L Expansion vessel connection M Primary circuit return (heat pump brine outlet) N Primary pump Assembly and installation information Fit the brine accessory pack horizontally to ensure the correct function of the air separator. Fit the air blow-off connector above the brine accessory pack. Check the circulation pump for an adequate residual head (see curves). Position the pump cable entry so that it points downwards or to the l.h. or r.h. side, or turn the pump head if required. If the brine circuit pressure switch is not connected, the brine accessory pack can also be installed in the external interconnecting duct (waterproof). Primary pump For installation in the primary circuit return (brine return) Components: Circulation pump 400 V~ Thermal insulation (vapour diffusion-proof) Contactor relay For operation with water/tyfocor, the pump output supplements should be taken into account (see page 4). Heat pump type BW 121 BW 129 BW 145 Circulation pump part no. Wilo standard circulation pump, type TOP S 0/7, 400 V~ Z on-site Wilo standard circulation pump, type TOP S 0/10, 400 V~ Z VIESMANN VITOCAL 00-G

13 Installation accessories (cont.) Wilo standard circulation pump curves Wilo high efficiency circulation pump curves Only in conjuction with brine accessory pack min. ( ) (2 ) max. (1 ) Head in m Pump rate in m³/h 2 Head in m Pump rate in m³/h Type TOP S 0/7, 400 V~ Head in m 5 4 min. ( ) (2 ) max. (1 ) Pump rate in m³/h Output in W max. 10 m 8 m 6 m Pump rate in m³/h Type Stratos Para ( - 11 m), 20 V~ 4 m 2 m Type TOP S 0/10, 400 V~ Brine distributor for geothermal collectors (Vitocal rated heating output: max. 7.1 kw) Part no Brass brine distributor, pre-assembled on two anti-vibration mounts. Can be fitted to the house wall, in the cellar duct or in the central service duct. 2 quick-acting air vent valves 1 drain & fill valve per header Up to 4 brine distributors can be connected to each flow and return. Components: 2 headers for flow and return Flow and return connections for 10 brine circuits, ball valves and locking ring fittings (PE ) VITOCAL 00-G VIESMANN 1

14 Installation accessories (cont.) ¼" ¼" 6 A Header G 1¼ (flow) B Header G 1¼ (return) C Locking ring fittings for PE mm D Ball valve for filling and draining E Ball valves for shutting off the individual circuits F Sound-absorbing panel Connection versions VL RL RL Brine return VL Brine flow For the allocation of brine distributor to heat pump type, see table in design information, "Heat sources for brine/water heat pumps", page 7. A Brine flow B Brine return Brine distributor for geothermal probes/geothermal collectors Locking ring fittings Number of brine circuits Part no. Geothermal probes Geothermal collectors PE 25 x PE 2 x Brine distributor for geothermal probes/geothermal collectors Nickel-plated brine distributor. Can be fitted to the house wall, in the cellar duct or in the central service duct. Components: Header for separate flow and return Flow and return connections for 2, or 4 brine circuits, ball valves and locking ring fittings (PE or PE 2 2.9) Installation accessories 2 drain & fill valves Up to 4 brine distributors can be connected to each flow and return. Brine distributors for 2, and 4 brine circuits can be combined in any order. 14 VIESMANN VITOCAL 00-G

15 Installation accessories (cont.) A C B E 80 F D 80 Brine distributor for 2 brine circuits Brine distributor for 4 brine circuits A B 255 C A Union nut G 2 for ball valve connection, locking ring fitting or a further module B Ball valve for filling and draining C Header G 1½ D Locking ring fittings for PE mm or PE mm E 2" end cap with G ½ plug F Ball valves for shutting off the individual circuits E 10 F 80 D Brine distributor for brine circuits Connection versions VL VL RL Example for 4 brine circuits RL 5 RL Brine return VL Brine flow Example for 8 brine circuits RL Brine return VL Brine flow For the allocation of brine distributor to heat pump type, see tables in design information, "Heat sources for brine/water heat pumps", pages 7 and 9. VITOCAL 00-G VIESMANN 15

16 Installation accessories (cont.) Heat transfer medium Tyfocor 0 l in a disposable container Part no l in a disposable container Part no Light green ready mixed medium for the primary circuit, down to 15 C, based on ethylene glycol with corrosion inhibitors. 2 Filling station Part no For filling the primary circuit. Components: Self-priming impeller pump (0 l/min) Dirt filter, inlet side Hose, inlet side (0.5 m) Connection hose (2 pce, each 2.5 m) Packing crate (can be used as flushing tank) 16 VIESMANN VITOCAL 00-G

17 Installation accessories (cont.) 2.2 Secondary circuit Secondary pump Secondary pump (DHW and central heating) Wilo standard circulation pump, type RS Part no /6-, 20 V~ (only for Vitocal with rated heating output up to 28.8 kw) Secondary pump (central heating) Grundfos, type UPS 25-60, 20 V~ Part no Laing EC Vario 25/180 G (class B), 20 V~ Part no Wilo standard circulation pump curves Head in m Output in W min. () (2) max. (1) Pump rate in m³/h min. () (2) Pump rate in m³/h 4 max. (1) 4 Grundfos curves Head in m UPS Flow rate in m³/h Type UPS 25-60, 20 V~ Laing curves Head in m 6 5 E6 vario 4 E4 vario Flow rate in m³/h Type E4/E6 Vario 25/180, 20 V~ Head in m E6 auto 2 E4 auto Flow rate in m³/h Type E4/E6 Auto 25/180, 20 V~ 2 Type RS 25/6-, 20 V~ VITOCAL 00-G VIESMANN 17

18 Installation accessories (cont.) Wilo high efficiency circulation pump curves Only in conjunction with a hydraulic module. 2 Head in m Pump rate in m³/h 60 Output in W Pump rate in m³/h Type Stratos Para (1-7 m), 20 V~ Safety equipment block Part no Components: Safety valve R ½ (blow-off pressure bar) Pressure gauge Automatic air vent valve with automatic shut-off facility Thermal insulation VIESMANN VITOCAL 00-G

19 Installation accessories (cont.) 2. Cooling Contact humidistat Part no Dew point contact switch to prevent the formation of condensate Natural cooling extension kit Part no Components: PCB for processing signals and controlling the natural cooling function Connection plug Installation accessories 2 2-way motorised ball valve (DN 2) Part no With electric drive (20 V~) Connection R 1¼" Three-way diverter valve (R 1¼) Part no With electric drive (20 V~) Connection R 1¼ Room temperature sensor Part no For a separate cooling circuit. For specification see chapter on control unit accessories (from page 62) Frost stat Part no Safety switch to protect the cooling heat exchanger from frost. Fan convectors Vitoclima 200-C With three-way control valve With 4-pipe heat exchanger for heating and cooling For wall mounting Fan convector Vitoclima 200-C Type V202H V20H V206H V209H Z Z Z Z Plinth for floor mounting Air filter (5 pce) VITOCAL 00-G VIESMANN 19

20 Installation accessories (cont.) Specification 2 Fan convectors Vitoclima 200-C Type V202H V20H V206H V209H Cooling capacity kw Output kw Power supply [terminals] 1/N/PE 20 V/50 Hz Fan power consumption at speed V1 W at speed V2 W at speed V W at speed V4 W at speed V5 W Cooling valve k v value m /h Connection R 1/2 R 1/2 R 1/2 R /4 Heating valve k v value m /h Connection R 1/2 R 1/2 R 1/2 R 1/2 Condensate connection Ø mm Thermostatically activated servomotor Max. permiss. ambient temperature C Max. permiss. media temperature C Power consumption W Rated current ma Weight kg Factory-set fan speed Dimensions a b c Front and side view A Plinth (accessory) Type Dimensions in mm a b c V202H V20H V206H V209H VIESMANN VITOCAL 00-G

21 Installation accessories (cont.) a A Air outlet B Top C 4 fixing holes 7 8 mm D Bottom E Floor F Air inlet b 100 c d Type Dimensions in mm a b c d V202H V20H V206H V209H Wall mounting (front view) a b a b A R.H. B L.H. C Heating return connection D Cooling return connection E Heating flow connection F Cooling flow connection f e d c c d e f Type Dimensions in mm a b c d e f g h k V202H V20H V206H V209H g h g h 100 Position of the hydraulic connections (side view, both sides) VITOCAL 00-G VIESMANN 21

22 Installation accessories (cont.) 2.4 DHW heating via an external heat exchanger 2-way motorised ball valve (DN 2) Part no With electric drive (20 V~) Connection R 1¼" Cylinder primary pump For DHW heating via a plate heat exchanger (on-site). Grundfos UPS B Part no Grundfos UPS 2-80 B Part no UPS 2-80 B Curves Head in m UPS 25-60B Pump rate in m³/h Type UPS B, 20 V~ Head in m Pump rate in m³/h Type UPS 2-80 B, 20 V~ Design information.1 Power supply and tariffs According to current Federal tariffs [Germany], the electrical demand for heat pumps is considered domestic usage. Where heat pumps are used to heat buildings, the local power supply company must first give permission [check with your local power supply company]. Check the connection conditions specified by your local power supply utility for the stated equipment details. It is crucial to establish whether a mono-mode and/or mono-energetic heat pump operation is feasible in the supply area. Application procedure The following details are required to assess the effect of the heat pump operation on the grid of your local power supply utility: User address Location where the heat pump is to be used Type of demand in accordance with general tariffs (domestic, agricultural, commercial, professional and other use) It is also important to obtain information about standing charges and energy tariffs, about the options for utilising off-peak electricity during the night and about any power-off periods. Address any questions relating to these issues to your customer's local power supply utility. Intended heat pump operating mode Heat pump manufacturer Type of heat pump Connected load in kw (from rated voltage and rated current) Max. starting current in A Max. heat load of the building in kw.2 Positioning requirements The installation room must be dry and safe from the risk of frost. Never install the appliance in living spaces or directly next to, below or above quiet rooms/bedrooms. Maintain the minimum clearances and minimum room volume (see the following chapter). Sound insulation measures: Heat pump installation on anti-vibration platforms or plinths (see next chapter). Reduction of reverberative surfaces, particularly on walls and ceilings. Rough structural renders absorb more sound than tiles. If quietness is a particularly important consideration, apply soundabsorbing material to the walls and ceilings (commercially available). Hydraulic connections: 22 VIESMANN VITOCAL 00-G

23 Design information (cont.) Always make hydraulic heat pump connections flexible and stressfree (e.g. by using Viessmann heat pump accessories). Apply anti-vibration fixings to pipework and installations. To prevent condensation, thermally insulate lines and components in the primary circuit with vapour diffusion-proof materials. Minimum clearances Additional strain relief clamps are required for the power cables if the clearance behind the heat pump is more than 80 mm. Observe clearances required for installation and maintenance A 400 = 00 A Type BW/BWS, WW, type BWS (stage 2) is always positioned to the left of type BW, WW (stage 1) Type BW, WW A Clearance depends on on-site installation and location A Clearance depends on on-site installation and location Min. space requirement According to DIN EN 78 the minimum volume for the installation room depends on the amount and the consistency of the refrigerant. V min = m max G V min Minimum room volume in m m max max. amount of refrigerant in kg G Practical limit in accordance with DIN EN 78, subject to the refrigerant constituency Refrigerant Practical limit in kg/m R 407 C 0.1 R 410 A 0.44 R 14 A 0.25 If several heat pumps are to be installed in one room, add the minimum room volumes of the individual appliances together. Taking into account the refrigerant used and the fill volume, the following minimum room volumes result: Rated heating output Min. space requirement 21.2 kw 15 m 28.8 kw 17 m 42.8 kw 2 m Electrical connections Observe the technical connection requirements specified by your local power supply utility. Your local power supply utility will provide you with details regarding the required metering and switching equipment. A separate electricity meter should be provided for the heat pump. Viessmann heat pumps operate with 400 V~ (in some countries 20 V models are also available). The control circuit requires a power supply of 20 V~. The control circuit fuse (6. A) is located in the heat pump control unit. VITOCAL 00-G VIESMANN 2

24 Design information (cont.) Power-OFF It is possible for the power supply utility to shut down the compressor and instantaneous heating water heater (if installed). The ability to carry out such a shutdown may be a power supply utility requirement for providing a lower tariff. This must not shut down the power supply to the heat pump control unit. Single stage heat pump D E F O U G L M P RS C K H A A Heat pump type BW, WW C DHW cylinder D Outside temperature sensor, sensor lead (2 x 0.75 mm 2 ) E DHW circulation pump, power cable ( x 1.5 mm 2 ) F Cylinder temperature sensor, sensor lead (2 x 0.75 mm 2 ) G Junction box H Motorised two-way valve, normally closed K Cylinder primary pump (DHW side), power cable ( x 1.5 mm 2 ) L Circulation pump for cylinder heating (heating water side), power cable ( x 1.5 mm 2 ) or Three-way diverter valve, power cable (5 x 1.5 mm 2 ) Recommendation: use the circulation pump for cylinder heating as hydraulic balancing is better achieved than with the three-way diverter valve. M Circulation pump, primary circuit (brine), power cable ( x 1.5 mm 2 or for circulation pump with thermal circuit breaker 5 x 1.5 mm 2 ) If a 400 V~ circulation pump is used, it should be connected via a contactor relay. Type WW: the following additional components: Well pump (If a 400 V~ well pump is used, it should be connected via a contactor relay.) Flow limiter Frost stat Separating heat exchanger O Secondary pump, power cable ( x 1.5 mm 2 ) Further circulation pumps are required for heating water buffer cylinders, heating circuits with mixers and external heat sources; see system scheme, page. P Instantaneous heating water heater (on site): An instantaneous heating water heater (on site) can only be installed outside the heat pump. The flow temperature sensor system must be installed in the direction of flow downstream of the instantaneous heating water heater. Power cable: See details provided by manufacturer Control via heat pump control unit R Heat pump control unit power cable, 20 V~, 50 Hz (5 x 1.5 mm 2 ) with power-off contact S Compressor power cable, 400 V~ (see table) U Electricity meter/mains For heating water buffer cylinders, heating circuits with mixers, external heat sources (gas/oil/wood) etc., additional supply and control cables and sensor leads must be factored in. Check the core cross-section of the power cables and enlarge if required. Recommended power cables: Type Heat pump control unit Compressor (400 V~) (20 V~) Max. cable length BW 121, WW x 1.5 mm 2 4 x 2.5 mm 2 50 m BW 129, WW x 1.5 mm 2 4 x 4.0 mm 2 50 m BW 145, WW x 1.5 mm 2 4 x 6.0 mm 2 40 m Line lengths in the heat pump plus wall clearance: Type BW, WW BWS Heat pump control unit power supply (20 V~) 1.0 m A connecting cable is used for the power supply Compressor power supply (400 V~) 1.0 m 1.0 m Additional power cables 1.5 m Connecting cable 24 VIESMANN VITOCAL 00-G

25 Design information (cont.) Two-stage heat pump D E F G L M N O U P RS T C K H B A A Heat pump type BW, WW (stage 1) B Heat pump type BWS (stage 2) C DHW cylinder D Outside temperature sensor, sensor lead (2 x 0.75 mm 2 ) E DHW circulation pump, power cable ( x 1.5 mm 2 ) F Cylinder temperature sensor, sensor lead (2 x 0.75 mm 2 ) G Junction box H Motorised two-way valve, normally closed K Cylinder primary pump (DHW side), power cable ( x 1.5 mm 2 ) L Circulation pump for cylinder heating (heating water side), power cable ( x 1.5 mm 2 ) or Three-way diverter valve, power cable (5 x 1.5 mm 2 ) Recommendation: use the circulation pump for cylinder heating as hydraulic balancing is better achieved than with the three-way diverter valve. Two circulation pumps for cylinder heating are required for the two-stage heat pump (one for every stage; see page 1). M Circulation pump, primary circuit (brine), power cable ( x 1.5 mm 2 or for circulation pump with thermal circuit breaker 5 x 1.5 mm 2 ) If a 400 V~ circulation pump is used, it should be connected via a contactor relay. With the two-stage heat pump, either a common primary pump can be used for both stages, or a separate primary pump can be used for each stage. Type WW: the following additional components: Well pump (If a 400 V~ well pump is used, it should be connected via a contactor relay.) Flow limiter Frost stat Separating heat exchanger N Electrical connecting cables between heat pump stage 1 and 2 (standard delivery) O Secondary pump, power cable ( x 1.5 mm 2 ) Two secondary pumps are required for the two-stage heat pump (one for every stage; see page 1). Further circulation pumps are required for heating water buffer cylinders, heating circuits with mixers and external heat sources; see system scheme, page. P Instantaneous heating water heater (on site): An instantaneous heating water heater (on site) can only be installed outside the heat pump. The flow temperature sensor system must be installed in the direction of flow downstream of the instantaneous heating water heater. Power cable: See details provided by manufacturer Control via heat pump control unit R Heat pump control unit power cable, 20 V~, 50 Hz (5 x 1.5 mm 2 ) with power-off contact S Compressor power cable, type BW, WW, 400 V~ (see table) T Compressor power cable, type BWS, 400 V~ (see table) U Electricity meter/mains For heating water buffer cylinders, heating circuits with mixers, external heat sources (gas/oil/wood) etc., additional supply and control cables and sensor leads must be factored in. Check the core cross-section of the power cables and enlarge if required. Recommended power cables: Type Heat pump control unit Compressor (400 V~) (20 V~) Max. cable length BW 121, WW x 1.5 mm 2 4 x 2.5 mm 2 50 m BWS x 2.5 mm 2 50 m BW 129, WW x 1.5 mm 2 4 x 4.0 mm 2 50 m BWS x 4.0 mm 2 50 m BW 145, WW x 1.5 mm 2 4 x 6.0 mm 2 40 m BWS x 6.0 mm 2 40 m Line lengths in the heat pump plus wall clearance: Type BW, WW BWS Heat pump control unit power supply (20 V~) 1.0 m A connecting cable is used for the power supply Compressor power supply (400 V~) 1.0 m 1.0 m Additional power cables 1.5 m Connecting cable VITOCAL 00-G VIESMANN 25

26 Design information (cont.). Hydraulic connections Connections on the primary side brine/water (stages 1 and 2) Single stage heat pump (type BW) wp P wq P P qt 2 wu ww 1 P Primary circuit interface (see system examples) Required equipment Pos. Description 1 Heat pump 2 Heat pump control unit qt Primary pump wp Brine accessory pack wq Pressure switch, primary circuit ww Brine distributor for geothermal probes/collectors wu Geothermal probes/collectors Two-stage heat pumps (type BW+BWS) Two primary pumps wp P wq P qz P qu wt qt 2 wu ww 9 1 P Primary circuit interface (see system examples) 26 VIESMANN VITOCAL 00-G

27 Design information (cont.) Equipment required Pos. Description 1 Heat pump stage 1 2 Heat pump control unit 9 Heat pump stage 2 qt Primary pump (heat pump stage 1) qz Flow temperature sensor, primary circuit qu Return temperature sensor, primary circuit wp Brine accessory pack wq Pressure switch, primary circuit ww Brine distributor, geothermal probes/collectors wt Primary pump (heat pump stage 2) wu Geothermal probes/collectors One common primary pump (on site) wp P wq P P qz qu qt 2 wu ww 9 1 P Primary circuit interface Equipment required Pos. Description 1 Heat pump stage 1 2 Heat pump control unit 9 Heat pump stage 2 qt Common primary pump qz Flow temperature sensor, primary circuit qu Return temperature sensor, primary circuit wp Brine accessory pack wq Pressure switch, primary circuit ww Brine distributor, geothermal probes/collectors wu Geothermal probes/collectors VITOCAL 00-G VIESMANN 27

28 Design information (cont.) Connections on the primary side water/water (stages 1 and 2) Single stage heat pump (type WW) wp P wq P P we qt 2 wr ww qo 1 wz wu wi P Primary circuit interface Equipment required Pos. Description 1 Heat pump 2 Heat pump control unit qt Primary pump qo Frost stat, primary circuit (conversion kit standard delivery) wp Brine accessory pack wq Pressure switch, primary circuit ww Separating heat exchanger, primary circuit we Flow limiter, well circuit ( (conversion kit standard delivery), remove jumper when connecting) wr Dirt trap wz Well pump (suction pump for groundwater; connect via on-site contactor with fuse protection) wu Delivery well wi Return well 28 VIESMANN VITOCAL 00-G

29 Design information (cont.) Two-stage heat pumps (type WW+BWS) Two primary pumps wp P wq P qz P qu wt qt we 2 wr ww qo 9 1 wz wu wi P Primary circuit interface (see system examples) Equipment required Pos. Description 1 Heat pump stage 1 with conversion kit water/water heat pump 2 Heat pump control unit 9 Heat pump stage 2 qt Primary pump (heat pump stage 1) qz Flow temperature sensor, primary circuit qu Return temperature sensor, primary circuit qo Frost stat, primary circuit (component of conversion kit) wp Brine accessory pack wq Pressure switch, primary circuit ww Heat exchanger, primary circuit we Flow limiter, well circuit (component of conversion kit; remove jumper when connecting) wr Dirt trap wt Primary pump (heat pump stage 2) wz Well pump (suction pump for groundwater; connection via on-site contactor with fuse protection) wu Delivery well wi Return well VITOCAL 00-G VIESMANN 29

30 Design information (cont.) One common primary pump (on site) wp P wq P qz P qu we qt 2 wr ww qo 9 1 wz wu wi P Primary circuit interface Equipment required Pos. Description 1 Heat pump stage 1 with conversion kit water/water heat pump 2 Heat pump control unit 9 Heat pump stage 2 qt Common primary pump qz Flow temperature sensor, primary circuit qu Return temperature sensor, primary circuit qo Frost stat, primary circuit (component of conversion kit) wp Brine accessory pack wq Pressure switch, primary circuit ww Heat exchanger, primary circuit we Flow limiter, well circuit (component of conversion kit; remove jumper when connecting) wr Dirt trap wz Well pump (suction pump for groundwater; connection via on-site contactor with fuse protection) wu Delivery well wi Return well 0 VIESMANN VITOCAL 00-G

31 Design information (cont.) Connections on secondary side for two-stage heat pumps C H W qp 6 qz qq 5 P qu wt qt qw 2 P qe C Cooling interface H Heating interface P Primary circuit interface (see primary circuit) W DHW interface (see DHW heating) Equipment required Pos. Description Heat source 1 Heat pump stage 1 2 Heat pump control unit Outside temperature sensor 5 Circulation pump for cylinder heating (heating water side), heat pump stage 1 6 Secondary pump, heat pump stage 1 9 Heat pump stage 2 qp Secondary pump, heat pump stage 2 qq Circulation pump for cylinder heating (heating water side), heat pump stage 2 qw Safety equipment block with safety assembly qe Expansion vessel qt Primary pump, heat pump stage 1 qz Flow temperature sensor, primary circuit qu Return temperature sensor, primary circuit wt Primary pump, heat pump stage 2 Two-stage heat pump cascade A heat pump cascade consists of a lead appliance and up to lag heat pumps. In a two-stage heat pump cascade, the lead appliance and lag heat pumps each consist of one heat pump stage 1 and one heat pump stage 2. The electrical connection is made at the heat pump stage 1 via KM BUS at external extension H1 (accessory). With external extension H1 (accessory), the swimming pool water heating function can be enabled in addition to the heat pump cascade connection. VITOCAL 00-G VIESMANN 1

32 Design information (cont.) qp W IV III II I H P C 5 qp 6 qp 6 qp 6 qq 5 qq 5 qq 5 qq qz qz qz qz qu qu qu qu wt qt wt qt wt qt wt qt C H P Cooling interface Heating interface Primary circuit interface W DHW interface I Lead appliance (two-stage) of the heat pump cascade II to IV Lag heat pump (two-stage) 1 to Equipment required Pos. Description Heat source 1 Heat pump stage 1 2 Heat pump control unit Outside temperature sensor 5 Circulation pump for cylinder heating (heating water side), heat pump stage 1 6 Secondary pump, heat pump stage 1 9 Heat pump stage 2 qp Secondary pump, heat pump stage 2 qq Circulation pump for cylinder heating (heating water side), heat pump stage 2 qt Primary pump, heat pump stage 1 qz Flow temperature sensor, primary circuit qu Return temperature sensor, primary circuit wt Primary pump, heat pump stage 2 2 VIESMANN VITOCAL 00-G

33 Design information (cont.).4 System versions X Requirement 0 Option Parameter "System scheme" Versions a b c a b c b c b c b c b c b c b c b c b c Heating operation and DHW heating Heating circuit A1 without X X X X X X X X X X X X X X mixer Heating circuit with X X X X X X X X X X X X X X X X mixer M2 Heating circuit M with mixer X X X X X X X X DHW cylinder X X X X X X X X X X X X Heating water buffer cylinder X X X X X X X X X X X X X X X X X X X X External heat source X X X X X X X X X X Cooling mode (only one cooling circuit possible) Heating circ. A Heating circuit M Heating circuit M Separate cooling circuit Swimming pool water heating Swimming pool (only with external extension H1) Solar DHW heating Solar (only with Vitosolic /200) Cascade operation Lead appliance X X X X X X X X X X X X X X X X X X X X X X X Lag heat pump X VITOCAL 00-G VIESMANN

34 Design information (cont.) Example: For further examples, see "Heat pump system examples". System version 6b: Heating circuit without mixer A1, heating circuit with mixer M2, DHW cylinder, heating water buffer cylinder.5 Sizing the heat pump Sizing is of particular relevance to heat pump systems that are to be operated in mono-mode, since oversized equipment will incur disproportionate system costs. Therefore avoid oversizing! First establish the standard heat load of the building Φ HL. For discussions with customers and for the preparation of a quotation, in most cases estimating the heat load is adequate. As with all heating systems, determine the standard heat load of the building in accordance with DIN EN 1281 before selecting the appropriate heat pump. Mono-mode operation According to DIN EN 1281, the heat pump system in mono-mode must, as sole heat source, be able to cover the entire heating demand of the building. When sizing the heat pump, observe the following: Take supplements to the heat load of the building to cover power- OFF periods into account. [In Germany] the power supply utility may cut off the power supply to heat pumps for up to 2 hours within a 24 hour period. Observe additional individual arrangements for customers with special tariffs. The building inertia means that 2 hours of power-off periods are not taken into consideration. However, the "enable time" between power-off periods must be at least as long as the preceding power-off period. Estimate of the heat load based on the heated area The heated surface area (in m 2 ) is multiplied by the following specific heat demand: Passive house 10 W/m 2 Low energy house 40 W/m 2 New build (to EnEV) 50 W/m 2 House (built prior to 1995 with standard thermal insulation) 80 W/m 2 Older house (without thermal insulation) 120 W/m 2 Theoretical sizing with the power supply blocked for 2 hour periods Example: For a new building with good thermal insulation (50 W/m 2 ) and a heated area of 170 m 2 Estimated heat load: 8.4 kw Maximum blocking time of 2 hours at a minimum outside temperature in accordance with DIN EN h, therefore, result in a daily heat volume of: 8.4 kw 24 h = 202 kwh To cover the maximum daily heat amount, only 18 h/day are available for heat pump operation on account of the power-off periods. The building inertia means that 2 hours of the period during which power is blocked are not taken into consideration. 202 kwh / (18 + 2) h = 10.1 kw In other words, the heat pump output would need to be increased by 20 %, if power-off periods of 2 hours per day were to be applied. Frequently, power-off periods are only invoked if there is a need to do so. Please contact the customer's power supply utility to enquire about power-off periods. 4 VIESMANN VITOCAL 00-G

35 Design information (cont.) Mono-energetic operation In heating mode, the heat pump system is supplemented by an instantaneous heating water heater (on site). The control unit switches the instantaneous heating water heater on, subject to the outside temperature (dual mode temperature) and heat load. That part of the electric power drawn by the instantaneous heating water heater will generally not be charged at special tariffs. Sizing of typical system configurations: The heat pump heating output must be designed for approx. 70 to 85 % of the maximum required heat load of the building in accordance with DIN EN The heat pump covers approx. 95 % of the annual heat load. Blocking periods must not to be taken into consideration. Compared to mono-mode operation, the heat pump will run for longer due to its smaller size. To compensate for this, increase the size of the heat source for brine/water heat pumps. For a geothermal probe system, an annual extraction rate of 100 kwh/m p.a. should not be exceeded. Instantaneous heating water heater (on site) An electric instantaneous heating water heater can be integrated in the heating water flow as an auxiliary heat source. The instantaneous heating water heater is connected and protected via a separate power supply connection. The heat pump control unit regulates this function. The instantaneous heating water heater can be enabled separately for central heating and DHW heating. If enabled the respective parameter, the heat pump control unit starts stages 1, 2 or of the instantaneous heating water heater, subject to the prevailing heat demand. As soon as the maximum flow temperature in the secondary circuit is reached, the heat pump control unit switches the instantaneous heating water heater off. Parameter "Stage at power-off" restricts the output stage of the instantaneous heating water heater for the duration of the power-off period. To limit the total power consumption, the heat pump control unit stops the instantaneous heating water heater for a few seconds directly before the compressor starts. Each stage is subsequently started individually one after the other in intervals of 10 s. If the instantaneous heating water heater is on and the differential between flow and return temperatures in the secondary circuit does not rise by at least 1 K within 24 h, the heat pump control unit displays a fault message. Dual mode operation External heat source The heat pump control unit enables the heat pump to operate in dual mode with an external heat source, e.g. oil boiler. The external heat source is hydraulically connected to let the heat pump also be used as a return temperature raising facility for the boiler. System separation is provided either with a low loss header or heating water buffer cylinder. For optimum heat pump operation, the external heat source must be integrated via a mixer into the heating water flow. A quick reaction is achieved by directly controlling this mixer via the heat pump control unit. If the outside temperature (long-term average) is below the dual mode temperature, the heat pump control unit starts the external heat source. In case of direct heat demand from the consumers (e.g. for frost protection or if the heat pump is faulty), the external heat source is also started above the dual mode temperature. In addition, the external heat source can be enabled for DHW heating. The heat pump control unit does not contain any safety function for the external heat source. To prevent excessive temperatures in the heat pump flow and return in case of a fault, high limit safety cut-outs must be provided to stop the external heat source (switching threshold 70 C). Supplement for DHW heating For general house building, a max. DHW consumption of approx. 50 litre per person per day at approx. 45 ºC is assumed. This represents an additional heat load of approx kw per person given a heat-up time of 8 h. This supplement will only be taken into consideration if the sum total of the additional heat load is greater than 20 % of the heat load calculated in accordance with DIN EN DHW demand at a DHW temperature of 45 C Specific available heat Recommended heat load supplement for DHW heating *1 in l/d per person in Wh/d per person in kw/person Low demand 15 to to to 0.15 Standard demand *2 0 to to to 0.0 *1 With a DHW cylinder heat-up time of 8 h. *2 Select a higher supplement if the actual DHW demand exceeds the stated values. VITOCAL 00-G VIESMANN 5

36 Design information (cont.) or Apartment (billing according to demand) Apartment (flat rate billing) Detached house *2 (average demand) Reference temperature of 45 C Specific available heat Recommended heat load supplement for DHW heating *1 in l/d per person in Wh/d per person in kw/person 0 approx approx approx approx approx approx Supplement for setback mode A supplement for setback mode in accordance with DIN EN 1281 is not required as the heat pump control unit is equipped with a temperature limiter for setback mode. In addition, the control unit is equipped with start optimisation, which means that there is also no need for a supplement for heating up from setback mode..6 Heat source for brine/water heat pumps Frost protection To safeguard a trouble-free heat pump operation, use anti-freeze based on glycol in the primary circuit. This must protect against frost down to at least -15 C and contain suitable anti-corrosion inhibitors. Ready-mixed solutions ensure an even distribution of concentrate. For the primary circuit, we recommend the ready-mixed solution "Tyfocor" which is based in ethylene glycol. Both functions must be enabled in the control unit. If any of the supplements are omitted because of the activated control unit functions then this must be documented when the system is handed over to the operator. If these supplements are to be taken into account in spite of the control options, calculate them in accordance with DIN EN When selecting the anti-freeze, always observe the stipulations of the authorising body. Geothermal collector The thermal properties of the upper layer of the earth, such as the volumetric thermal capacity and thermal conductivity, are largely dependent on the consistency and properties of the ground. The wetter the soil, the higher the proportion of mineral constituents (quartz or feldspar) of the soil and the smaller the proportion of pores, the better the storage characteristics and thermal conductivity. The specific extraction rate q E for the ground lies between approx. 10 and 5 W/m 2. F B C D A E 1500 mm m F Dry sandy soil q E = W/m 2 Damp sandy soil q E = W/m 2 Dry loamy soil q E = W/m 2 Damp loamy soil q E = 25 0 W/m 2 Ground with groundwater q E = 0 5 W/m 2 H G These details enable the required ground area to be calculated subject to the heat load of the building and the refrigerating capacity ² K of the heat pump. ² K = ² WP P WP ² K is the difference between the heat pump heating output (² HP ) and its power consumption (P HP ). Manifolds and headers The manifold and the header should be installed so that they are accessible for future inspections, e.g in their own distribution ducts outside the house or in the basement window duct. Every pipe circuit should be able to be isolated individually on the flow and return side to enable the collector to be filled and vented. Example of a common duct A Access point mm B Concrete rings C Primary flow D Primary return E Brine distributor F Collector pipes G Crushed stone H Drainage *1 With a DHW cylinder heat-up time of 8 h. *2 Select a higher supplement if the actual DHW demand exceeds the stated values. 6 VIESMANN VITOCAL 00-G

37 Design information (cont.) 2 Example of a wall outlet A To the heat pump B Building C Foundations D Drainage E Seal F Pipe liner G Crushed stone H PE 2.0 (2.9) K Ground All pipes, profiles etc. must be made from corrosion-resistant materials. Flow and return lines transport cold brine (brine temperature < cellar temperature). For that reason, all pipes inside the house and the wall outlets (even inside the wall structure) must be thermally insulated and vapour diffusion-proof to prevent the formation of condensation and subsequent damage from moisture. Alternatively, a drain can be installed to remove condensate. Practical experience has shown that a prepared brine mixture is satisfactory for filling the system. Pipework should be routed on the outside of the building with a slight slope to prevent ingress of water during heavy rain. A good drainage system will ensure that the rainwater drains away. The use of approved wall outlets (e.g. Doyma) is required if the site makes specific demands regarding pressing water. Rough sizing Basis for sizing is the refrigerating capacity ² K of the heat pump at operating point B0/W5. Required area F E = ² K /³ E (average extraction rate subject to ground conditions). Required number of pipe 100 m length subject to F E and the pipe dimension: With PE : Pipe 100 m length = F E /100 With PE 25 2.: Pipe 100 m length = F E 2/100 With PE 2.0 (2.9): Pipe 100 m length = F E 1.5/100 The detailed design depends on the ground structure and can only be determined following a local inspection. Required brine distributor 100 m length at ³ E = 25 W/m 2 (estimated sizing) Heat pump ² K F E PE PE PE type (rounded) Pipe circuits Brine distributor Pipe circuits Brine distributor Pipe circuits Brine distributor kw m 2 Part no. Part no. Part no. Single stage heat pump BW x x x x 77 1 BW x on-site 14 2 x x BW on-site 27 on-site 21 on-site Two-stage, both stages with the same output BW+BWS on-site 27 on-site 20 on-site BW+BWS on-site 7 on-site 28 on-site BW+BWS on-site 55 on-site 41 on-site Two-stage, stages with different output BW+BWS on-site 2 on-site 24 on-site BW+BWS on-site 41 on-site 1 on-site BW+BWS on-site 46 on-site 5 on-site VITOCAL 00-G VIESMANN 7

38 Design information (cont.) Up to 4 brine distributors can be connected to a flow or return pipe. If more than 4 brine distributors are required, additional geothermal collector circuits are also required. The brine distributors and geothermal collector circuits must be designed and sized by a specialist contractor (e.g. Viessmann geothermal department or an engineering consultancy). Example calculations for sizing the heat source Selection of the heat pump Building heat load (net heat load) DHW heating supplement for a -person household Power-OFF periods Total heat load of the building System temperature (at min. outside temp. 14 C) 45/40 C Heat pump operating point B0/W5 4.8 kw 0.75 kw (see chapter "DHW heating supplement": 0.75 kw < 20 % of building heat load) 2 h/d (only 4 h are taken into consideration, see chapter "Mono-mode operation") 5.76 kw The heat pump with a heating output of 6.4 kw (incl. supplement for power-off periods, excl. DHW heating), refrigerating capacity ² K = 4.9 kw corresponds to the required output. Sizing the geothermal collector Average specific extraction rate ³ E = 25 W/m 2 ² K = 4.9 kw F E = ² K /³ E = 4900 W/25 W/m m 2 The number X of required pipe circuits (PE pipe m length each results from: X = F E 1.5/100 = 200 m m/m 2 /100 m = pipe circuits Selected: pipe 100 m length (Ø 2 mm.0 (2.9) mm with 0.51 l/m) Required amount of heat transfer medium (V R ) Take the content of the geothermal collector including all supply lines, plus the volume of fittings and the heat pump into consideration. Provide manifolds corresponding to the number of pipe circuits. The low refrigerating capacity and the connection length mean that a supply line of PE 2.0 (2.9) is adequate. Supply line: 10 m (2 5 m) with PE 2.0 (2.9) V R = Number of pipe circuits 100 m Pipeline volume + Supply line length Pipeline volume = 100 m 0.51 l/m + 10 m 0.51 l/m = 159. l l = 165 l Selected: 200 litre (incl. heat transfer medium in the fittings and the heat pump) Geothermal collector pressure drop Flow rate, heat pumps with 6.2 kw: 1200 l/h Flow rate per pipe circuit = (900 l/h)/( circuits of 100 m) each = 00 l/h per pipe circuit Δp = R value pipe length R value (resistance value) for PE 2.0 (2.9) (see tables Pressure drop for pipelines): At 00 l/h 1.2 Pa/m At 1600 l/h 14.7 Pa/m Δp Pipe circuit = 2 Pa/m 100 m = 200 Pa Δp Supply line = 15 Pa/m 10 m = 150 Pa Δp permissible = Pa = 400 mbar (max. ext. pressure drop, primary side) Δp = Δp Pipe circuit + Δp Supply line = 200 Pa Pa = 650 Pa 6.5 mbar Result: The intended geothermal collector can be used with a heat pump with 6.2 kw rated heating output, since Δp = Δp pipe circuit + Δp supply line does not exceed the value for Δp permissible. 8 VIESMANN VITOCAL 00-G

39 Design information (cont.) Geothermal probe RL VL RL Primary return VL Primary flow A Bentonite-cement suspension B Protective cap On smaller plots, geothermal probes are an alternative to geothermal collectors when retrofitting existing buildings. In the following we consider the double U-shaped tubular probe. One version would be two double U-shaped tubular loops made from plastic in one borehole. All cavities between the pipes and the ground are filled with a highly conductive material (bentonite). We recommend the following spacing between 2 geothermal probes: Down to 50 m depth: 5 m (min.) Down to 100 m depth: 6 m (min.) For systems such as this, notify your local water board well in advance of commencing such installations. The geothermal probes are installed either by drilling or by ramming, subject to their respective design. Systems of this type require a permit from your local water board. Further information can be obtained from the geothermal probe manufacturer (see "Manufacturer's addresses" in the appendix). We recommend arranging the sizing to match the regional conditions and the drilling service to be carried out by the contractor suggested by your local Viessmann sales office. Possible specific extraction rates q E for double U-shaped pipe probes (to VDI 4640 sheet 2) Substructure Specific Extract rate q E in W/m General guidelines Poor ground (dry sediment) 20 (λ < 1.5 W/(m K)) Normal solid rock subsoil and 50 water-saturated sediment (1.5 λ.0 W/(m K)) Solid rock with high thermal conductivity 70 (λ >.0 W/(m K)) Individual rocks Gravel, sand (dry) < 20 Gravel, sand (aquiferous) Clay, loam (damp) 0-40 Chalk (solid) Sandstone Acidic magmatite (e.g. granite) Basic magmatite (e.g. basalt) 5-55 Gneiss Rough sizing Basis for sizing is the refrigerating capacity ² K of the heat pump at operating point B0/W5. Required probe length l = ² K /³ E (³ E = average extraction rate subject to ground conditions). The detailed sizing depends on the ground structure and the watercarrying ground strata, and can only be determined following a local inspection by the drilling contractor. The reduction of the number of drilled holes in favour of probe depth increases the pressure drop to be overcome and the required pump rate. Information regarding dual mode parallel and mono-energetic operation In case of dual mode parallel and mono-energetic operation, consider the higher heat source load (see "Sizing"). As a guide, a geothermal probe system should not exceed an extraction of 100 kwh/m a p.a. Required geothermal probes and brine distributors at ³ E = 50 W/m, probe (to VDI 4640) for 2000 operating hours (estimated sizing) Heat pump type ² K PE Overall pipe length Geothermal probes Brine distributor kw m Length in m Part no. Single stage heat pump BW BW BW Two-stage, both stages with the same output BW+BWS BW+BWS on-site BW+BWS on-site Two-stage, stages with different output BW+BWS on-site BW+BWS on-site BW+BWS on-site VITOCAL 00-G VIESMANN 9

40 Design information (cont.) Brine distributors for two-stage heat pump (BW+BWS) and single stage heat pump type BW 145 The brine distributors for geothermal probes must be designed and sized by a specialist contractor (e.g. Viessmann geothermal department or an engineering consultancy). The guide values given above include an additional 20 %. Example calculations for sizing the heat source Selection of the heat pump Building heat load (net heat load) DHW heating supplement for a -person household Power-OFF periods Total heat load of the building System temperature (at min. outside temp. 14 C) 45/40 C Heat pump operating point B0/W5 4.8 kw 0.75 kw (see chapter "DHW heating supplement": 0.75 kw < 20 % of building heat load) 2 h/d (only 4 h are taken into consideration, see chapter "Mono-mode operation") 5.76 kw The heat pump with a heating output of 6.2 kw (incl. supplement for power-off periods, excl. DHW heating), refrigerating capacity ² K = 4.9 kw corresponds to the required output. Sizing the geothermal probe as double U-pipe Average extraction rate ³ E = 50 W/m probe length ² K = 4.9 kw Probe length L = ² K /³ E = 4900 W/50 W/m = 98 m 100 m Selected pipe for the probe: PE 2.0 (2.9) with 0.51 l/m Required amount of heat transfer medium (V R ) Take the content of the geothermal probe including all supply lines, plus the volume of fittings and the heat pump into consideration. Provide manifolds when using > 1 probe. Size the supply line larger than the pipe circuits; we recommend PE 2 to PE 6. Geothermal probe as double U-shaped pipe Supply line: 10 m (2 5 m) with PE 2.0 (2.9) V R = 2 Probe length L 2 Pipeline volume + Supply line length Pipeline volume = m l/m + 10 m 0.51 l/m = l Selected: 220 litre (incl. heat transfer medium in the fittings and the heat pump) Pressure drop of the geothermal probe Heat transfer medium: Tyfocor Flow rate, heat pumps with 6.2 kw: 900 l/h Flow rate per U-shaped pipe: 900 l/h : 2 = 450 l/h Δp = R value pipe length R value (resistance value) for PE 2.0 (2.9) (see tables Pressure drop for pipelines): At 450 l/h 46.9 Pa/m At 900 l/h 190 Pa/m Δp Double U-shaped pipe probe = 46.9 Pa/m m = 980 Pa Δp Supply line = 190 Pa/m 10 m = 1900 Pa Δp permissible = Pa = 400 mbar (max. ext. pressure drop, primary side) Δp Double U-shaped pipe probe + Δp supply line = 980 Pa Pa = Pa 112 mbar Result: The intended geothermal probe can be used with a heat pump with 6.2 kw rated heating output, since Δp = Δp double U-shaped pipe probe + Δp supply line does not exceed the value for Δp permissible. Expansion vessel for primary circuit A diaphragm expansion vessel with a capacity of 25 l is sufficient up to a supply line length of 20 m and up to a size of PE 40. Detailed calculations are required for greater lengths. V A = Total system volume (brine) in litres V N = Rated volume of the diaphragm expansion vessel in litres V Z = Increase in volume during system heat-up in litres = V A β β = Expansion factor (β for Tyfocor = 0.01) V V = Safety hydraulic seal (heat transfer medium Tyfocor) in litres = V A (hydraulic seal: 0.005), at least l (to DIN 4807) 40 VIESMANN VITOCAL 00-G

41 Design information (cont.) p e = Permiss. terminal pressure in bar = p si 0.1 p si = 0.9 p si p si = Safety valve blow-off pressure = bar V N = V Z + V V P e P st (P e + 1) p st = Nitrogen pre-charge pressure = 1.5 bar Expansion vessel capacity for geothermal collector V A = Geothermal collector content incl. supply line + heat pump content = 10 l V Z = V A β = 10 l 0.01 = 1. l V V = V A = 10 l = 0.65 l selected l V N = 1. litres +.0 litres 2.7 bar 1.5 bar (2.7 bar + 1) = 1.25 litres Expansion vessel capacity for geothermal collector V A = Geothermal collector content incl. supply line + heat pump content = 220 l V Z = V A β = 220 l 0.01 = 2.2 l V V = V A = 220 l = 1.1 l selected l V N = 2.2 litres +.0 litres 2.7 bar 1.5 bar (2.5 bar + 1) = litres Pipework, primary circuit Pressure drop The areas in the following tables with a grey background are subject to laminar flow, thereafter turbulent flow. For optimum heat extraction from the ground, we recommend sizing the pipework in the turbulent area. R value (resistance value): R value = pressure drop/m line The specified R values refer to Tyfocor heat transfer medium: Kinematic viscosity = 4.0 mm 2 /s Density = 1050 kg/m PE pipe mm, PN 10 Flow rate R value for Tyfocor l/h Pa/m PE pipe mm, PN 10 Flow rate R value for Tyfocor l/h Pa/m PE pipe mm, PN 10 Flow rate R value for Tyfocor l/h Pa/m VITOCAL 00-G VIESMANN 41

42 Design information (cont.) Flow rate R value for Tyfocor l/h Pa/m PE pipe 40.7 mm, PN 10 Flow rate R value for Tyfocor l/h Pa/m PE pipe mm, PN 10 Flow rate R value for Tyfocor l/h Pa/m PE pipe mm, PN 10 Flow rate R value for Tyfocor l/h Pa/m VIESMANN VITOCAL 00-G

43 Design information (cont.) Volumes in PE pipes, PN 10 External Ø pipe wall DN Volume per m pipe thickness mm l (2.9) Pump output supplements (percentage) for operation with Tyfocor Circulation pump curves, see chapter "Primary pump". Design flow rate ² A = ² water + f Q (in %) Design residual head H A = H water + f H (in %) Select the pump with the higher pump rates ² A and H A. The supplements only comprise the corrections for the circulation pumps. System curve or data corrections can be determined with the help of technical literature or information provided by the valve manufacturer. Viessmann heat transfer medium "Tyfocor" (ready-mixed for temperatures down to 15 C) has a ethylene glycol volume ratio of 28.6 % (calculated as 0 %). Volume ratio ethylene glycol % At an operating temperature of 0 C f Q % f H % At an operating temperature of +2.5 C f Q % f H % At an operating temperature of +7.5 C f Q % f H % Heat source for water/water heat pumps Groundwater Water/water heat pumps utilise the energy content of groundwater or cooling water. VITOCAL 00-G VIESMANN 4

44 Design information (cont.) B F E C F approx. 1. m D m m m m G H K A min. 5 m m m m O m m L M -2.0 m m N A Flow limiter, well circuit B Primary pump (integrated subject to type) C To the heat pump D Frost stat, primary circuit E Heat exchanger, primary circuit F Well shaft G Supply pipe Water/water heat pumps achieve high performance factors. Groundwater offers an almost constant temperature of 7 to 12 C all year round. Therefore the temperature level needs to be raised only a little higher (compared to other heat sources) in order for it to be able to be utilised for heating purposes. Depending on the design, the heat pump cools the groundwater by up to 5 K, although its consistency remains otherwise unchanged. On account of the costs for pumping systems, for detached houses and two-family homes, we recommend the pump groundwater from depths of not more than approx. 15 m (see the above diagram). For commercial or large scale systems pumping from even greater depths could still be viable. Maintain a distance of 5 m between the point of extraction (delivery well) and the point of re-entry (return well). Supply and return wells must be located in the line of flow of the groundwater to prevent a "flow short circuit". Construct the return well so that the water exits below the groundwater level. H Non-return valve K Well pump L Delivery well M Flow direction of the groundwater N Return well O Pressure pipe Due to fluctuating water quality, we generally recommend a system separation between wells and heat pump. The groundwater flow and return lines to/from the heat pump must be protected against frost and must slope towards the well. Calculating the required groundwater volume The required ground water flow rate depends on the heat pump output and the rate of ground water cooling. For the minimum flow rates, see the heat pump specification (e.g. minimum flow rate for Vitocal 00-G, type WW 121 = 5.2 m /h). Permits for a groundwater/water heat pump system This project requires permission from the "local water authority" [check local regulations]. Where buildings must be connected to the public water system, the utilisation of the groundwater as a heat source for heat pumps must be authorised by your local authority [check local regulations]. When sizing the primary pumps observe that higher flow rates result in increased internal pressure drop. Permits can be subject to certain stipulations. 44 VIESMANN VITOCAL 00-G

45 Design information (cont.) Sizing the heat exchanger, primary circuit/separating heat exchanger 10 C 8 C Fill primary circuit with anti-freeze mixture (brine, min. 5 C). A B 6 C 4 C A Water B Brine (antifreeze mixture) The operational reliability of a water/water heat pump improves when it is used with a primary circuit heat exchanger. Subject to the correct sizing of the primary pump and the optimum layout of the primary circuit, the coefficient of performance of the water/water heat pump will be reduced by a maximum of 0.4. We recommend the use of the threaded stainless steel plate heat exchanger from the Viessmann Vitoset pricelist (manufacturer: Tranter AG); see the following selection table. Selection list for plate heat exchangers for water/water heat pumps Heat pump Refrigerating Plate heat Flow rate Pressure drop capacity exchanger Well circuit Primary circuit Well circuit Primary circuit (threaded) Type kw Part no. m /h m /h kpa kpa Single stage heat pump WW WW WW Two-stage, both stages with the same output WW+BWS WW+BWS WW+BWS Two-stage, stages with different output WW+BWS WW+BWS WW+BWS Cooling water If cooling water from an industrial waste heat process is used as heat source for a water/water heat pump, observe the following: The water quality must be within the limit values (see "Basic principles", chapter "Heat recovery from groundwater", table "Resistance of copper soldered or welded stainless steel plate heat exchangers to substances contained in the water"). If the water quality falls outside these limits, use a stainless steel heat exchanger in the primary circuit (see table on page 45). Sizing is carried out by the manufacturer of the heat exchanger. The available amount of water must satisfy the minimum flow rates of the primary side of the heat pump (see specification). The max. inlet temperature for water/water heat pumps is 25 C. With higher cooling water temperatures, low-end controllers (e.g. as offered by Landis & Staefa GmbH, Siemens Building Technologies) on the primary side of the heat pump must limit the max. inlet temperature to 25 C by adding cool return water. The utilisation of cooling water is also possible in conjunction with a brine/water heat pump. The max. inlet temperature must then be limited to 25 C as for the water/water heat pump. VITOCAL 00-G VIESMANN 45

46 Design information (cont.) A B C D F VL RL E RL H K G A Overflow B Supply C Dirt trap (on-site) D Low-end controller and valve (on-site) E Primary pump F To the heat pump G Primary circuit heat exchanger (see page 45) H Circulation pump ( well pump) K Water container (min. 000 litre capacity, on-site).8 Central heating/central cooling Heating circuit Minimum flow rate Heat pumps require a minimum heating water flow rate (see specification), which must be maintained. To ensure the minimum flow rate, install an overflow valve or low loss header in systems without a heating water buffer cylinder. Low loss header When using a low loss header, ensure that the flow rate on the heating circuit side is greater than the flow rate on the secondary side of the heat pump. To prevent a fault shutdown, the minimum flow rate of the low loss header must be litres per kw rated heating output. The heat pump control unit treats a low loss header like a small heating water buffer cylinder. Therefore, configure the low loss header by means of the control unit settings as a heating water buffer cylinder. Systems with large water volumes Systems with large water volumes (for example, underfloor heating systems) can operate without a heating water buffer cylinder. In these heating systems, install an overflow valve at the heating circuit distributor of the underfloor heating system that is furthest away from the heat pump. This safeguards the minimum flow rate, even in sealed heating circuits. In conjunction with an underfloor heating system, install a temperature limiter as maximum temperature limiter (accessory, order no or ). Systems without heating water buffer cylinder To safeguard the minimum heating water flow rate (see specification), never install a mixer in the heating circuit. An additional circulation pump is then required. Heating circuit and heat distribution Different heating water flow temperatures are required depending on the heating system design. The heat pump reaches a maximum flow temperature of 60 C. When using radiators or when modernising or replacing boilers, the heat pump can be used, subject to the max. flow temperature of 60 C being observed. The lower the selected maximum heating water flow temperature, the higher the seasonal performance factor of the heat pump. 46 VIESMANN VITOCAL 00-G

47 Design information (cont.) 90 Flow temperature in C E Outside temperat. t A in C A B C D F A Max. heating water flow temperature = 75 C B Max. heating water flow temperature = 60 C C Max. heating water flow temperature = 55 ºC, requirement for mono-mode operation of the heat pump D Max. heating water flow temperature = 5 ºC, ideal for monomode operation of the heat pump E Heating systems that are conditionally suitable for dual mode operation of the heat pump F Max. heat pump flow temperature = 60 ºC Cooling operation Cooling mode is possible either with one of the available heating circuits, or with a separate cooling circuit (e.g. chilled ceilings or fan convectors). Operating modes Cooling operation via the heating circuits is carried out in the "Standard" and "Fixed value" operating modes. The separate cooling circuit is additionally cooled in "Reduced" and "DHW only" operating modes. The latter enables continuous cooling of a room, e.g. a warehouse during the summer months. The cooling output is subject to either weather-compensated control according to the heating or cooling curve, or room temperaturedependent control. For cooling mode in the following cases, a room temperature sensor must be installed and enabled: Weather-compensated cooling mode with room influence Room temperature-dependent cooling mode "Active cooling" A room temperature sensor must always be installed for a separate cooling circuit. Weather-compensated control In weather-compensated cooling mode, the set flow temperature is calculated from the relevant set room temperature and the current outside temperature (long-term average) according to the cooling curve. Their level and slope are adjustable. Standard operation The cooling output for the heating circuits is subject to either weathercompensated control according to the cooling curve, or room temperature-dependent control. Fixed value operation In "Fixed value" mode, the room is cooled with the minimum flow temperature..9 Systems with heating water buffer cylinder Heating water buffer cylinder operated in parallel Systems with small water volumes For systems with small water volumes (for example, heating systems with radiators), use a heating water buffer cylinder to prevent excessive heat pump cycling (starting/stopping). Benefits of a heating water buffer cylinder: Bridging power-off periods: At peak times, heat pumps may be switched off by your local power supply utility, subject to your electricity tariff. A heating water buffer cylinder supplies the heating circuits even during this power-off period. Constant flow rate through the heat pump: Heating water buffer cylinders provide hydraulic separation of the flow in the secondary and heating circuits. For example, the flow rate in the secondary circuit remains constant even if the heating circuit flow rate is reduced via thermostatic valves. Longer heat pump operating times VITOCAL 00-G VIESMANN 47

48 Design information (cont.) Because of the increased water volume of the heat source and the fact that it may have a separate shut-off facility, an additional (or larger) expansion vessel should be provided. Protect the heat pump in accordance with EN [or local regulations]. The flow rate of the secondary pump should be greater than that of the heating circuit pumps. Heating water buffer cylinder for optimised runtimes V HP = Q HP (20 to 25 litres) Q WP = Absolute rated heat pump heating output V HP = Heating water buffer cylinder volume in litres Example: Type BW 110 with Q WP = 10.2 kw V HP = litres = 204 litre cylinder capacity Selection: Vitocell 100-E with 200 litre capacity With two-stage heat pumps and heat pump cascades, the volume of the heating water buffer cylinder can be sized for runtime optimisation to match the highest possible rated heat pump heating output. Heating water buffer cylinder for bridging periods when the supply is blocked This version is offered for heat distribution systems without additional cylinder mass (e.g. radiators, hydraulic fan convectors). Storing 100 % of heating energy for the duration of the power-off periods is feasible, but not recommended, otherwise cylinders would become too large. Example: Φ HL = 10 kw = W t Sz = 2 h (max. x per day) Δϑ =10 K = 1.16 Wh/(kg K) for water c P V HP W 2 h = Wh =1720 kg 1.16 kg k 10 k 1720 kg water represent a cylinder capacity of approx l. Selection: 2 Vitocell 100-E each with 1000 l capacity. Rough sizing (subject to the utilisation of the delayed building heat loss) V HP = Φ HL (60 to 80 l) c P Spec. thermal capacity in kwh/(kg K) Φ HL Heat load of the building in kw t Sz Period in h during which the supply is blocked V HP Heating water buffer cylinder volume in litres Δϑ System cool-down in K V HP V HP = l = 600 litre cylinder capacity Selection: 1 Vitocell 100-E with 750 litre cylinder capacity. 100 % sizing (subject to the existing heating surfaces) V HP = Φ HL c Δ P t SZ.10 Water quality Heating water Unsuitable fill and top-up water increases the level of deposits and corrosion and may lead to system damage. Regarding the quality and amount of heating water, incl. fill and top-up water, observe the VDI 205 [or local regulations]. Thoroughly flush the entire heating system prior to filling it with water. Only use fill water of potable quality. Soften fill water with a hardness above 16.8 dh (.0 mol/m ), e.g. with the small softening system for heating water (see the Viessmann Vitoset pricelist). 48 VIESMANN VITOCAL 00-G

49 Design information (cont.).11 DHW heating DHW connection Example with Vitocell 100-V, type CVW Connection to DIN O H A B C D G K L M NF K K F P R K S O E F A DHW B DHW circulation line C DHW circulation pump D Spring-loaded check valve E Expansion vessel, suitable for drinking water F Drain G Visible blow-off line outlet H Safety valve K Shut-off valve Information on potable water filter According to DIN , a drinking water filter should be installed in systems with metal pipework. We also recommend the installation of a drinking water filter when using plastic pipes, as per DIN 1988, to prevent contaminants entering the DHW system. L Flow regulating valve (installation recommended) M Pressure gauge connector N Non-return valve O Cold water P Drinking water filter R Pressure reducer to DIN issue Dec,1988 S Non-return valve/pipe separator Recommendation: Install the safety valve higher than the top edge of the cylinder. This protects the valve against contamination, scaling and high temperatures. The DHW cylinder does not then need to be drained when working on the safety valve. Safety valve Protect the DHW cylinder by means of a safety valve against undue excess pressure. Function description regarding DHW heating Compared to central heating, DHW heating makes fundamentally different demands, as almost identical amounts of heat must be provided all the year round at the same temperature level. In the delivered condition, DHW heating by the heat pump takes priority over the heating circuits. The heat pump control unit switches the DHW circulation pump off during cylinder heating to prevent cylinder heating from being impaired. The max cylinder storage temperature is limited subject to the heat pump used and the individual system configuration. With a booster heater, storage temperatures above this limit are possible. Available booster heaters to reheat the DHW: External heat source Instantaneous heating water heater (on site) Immersion heater (on site) The integral load manager in the heat pump control unit decides which heat sources to use for DHW heating. Generally the external heat source has priority over the electric heaters. If one of the following criteria is met, the booster heaters begin cylinder heating: Cylinder temperature is below C (frost protection). Heat pump does not provide any heating output and actual temperature has fallen below set temperature at the top cylinder temperature sensor. VITOCAL 00-G VIESMANN 49

50 Design information (cont.) The immersion heater in the DHW cylinder and the external heat source stop as soon as the set value at the top temperature sensor is reached, minus a hysteresis of 1 K. When selecting the DHW cylinder ensure that its indirect coil surface area is large enough for the purpose. DHW heating should ideally take place during the night after 22:00 h. This has the following advantages: The heat pump heating output is available for central heating during the daytime. Night tariffs can be utilised to the full. DHW cylinder heating and simultaneous drawing can be avoided. When using an external heat exchanger, the system may not always achieve the required draw-off temperatures because of the system design. Hydraulic connection, primary store system Cylinder with external heat exchanger (primary store system) DHW eu ew ez M et W X ee er ep KW W X DHW interface (see system examples) Solar interface or external heat source (see system examples) KW Cold water WW Domestic hot water Required equipment Pos. Description ep DHW cylinder ew Cylinder temperature sensor ee Cylinder primary pump (DHW side) er Plate heat exchanger et Flow limiter ez Motorised two-way valve, normally closed eu DHW circulation pump 50 VIESMANN VITOCAL 00-G

51 Design information (cont.) Cylinder with external heat exchanger (primary store system) and heating lance WW L A B E G H C D KW K KW Cold water WW Domestic hot water B DHW inlet from the heat exchanger L Heat pump interface Further explanations see the following table. During cylinder heating (no draw-off) in the primary store system, cold water from the bottom of the cylinder is drawn by cylinder primary pump E, heated in heat exchanger K and returned to the cylinder via heating lance A fitted into the flange. The generously sized outlet apertures in the heating lance result in low flow velocities, which in turn provide a clean temperature stratification inside the cylinder. DHW booster heating is possible if an additional immersion heater is installed (on site). Equipment required Pos. Description Quantity Part no. A Heating lance 1 Z C Cylinder temperature sensor D Vitocell 100-L, (750 or 1000 litre capacity) 1 see Viessmann pricelist E Cylinder primary pump or G Two-way motorised ball valve (N/C) H Flow limiter 1 on-site K Plate heat exchanger Vitotrans see Viessmann pricelist Selection, primary store system Primary store Primary store Capacity Optional booster heater Applications l Immersion heater (on site) Instantaneous heating water heater (on site, for preheated DHW) Vitocell 100-L, type CVL 750 x x up to 16 people 1000 x x up to 16 people Plate heat exchanger Vitotrans 100 Heat exchanger pressure drop values, see technical guides for DHW cylinders. VITOCAL 00-G VIESMANN 51

52 Design information (cont.) 50 C 60 C A B 40 C 42 C A DHW cylinder (domestic hot water) B Heat pump (heating water) Flow rate and pressure drop at B15/W5 C Heat pump Heating output Flow rate Pressure drop Vitotrans 100 A B A B Type kw m /h m /h kpa kpa Part no. Single stage heat pump BW WW 121 BW WW 129 BW 145 WW For higher DHW temperatures 58 C 60 C A B 5 C 55 C A DHW cylinder (domestic hot water) B Heat pump (heating water) Flow rate and pressure drop at B15/W5 C Heat pump Heating Flow rate Pressure drop Vitotrans 100 output A B A B Type kw m /h m /h kpa kpa Part no. Single stage heat pump BW WW 121 BW WW 129 BW 145 WW on request s for BW 145, WW 145 In combination with Vitocell 100-L, type CVL, the flow rate of m /h cannot be reached. On-site DHW cylinder required. Cylinder primary pump curves See page VIESMANN VITOCAL 00-G

53 Design information (cont.).12 Cooling operation Types and configuration Subject to system version the following cooling functions are possible: "Natural cooling" (as option with or without mixer) The compressor is shut down and heat exchange occurs directly with the primary circuit. "Active cooling" The heat pump is used as a refrigeration unit, meaning a higher cooling capacity is possible than with natural cooling. This function is only possible outside a power-off period, and must be enabled separately by the system user. Even if active cooling is selected and enabled, the control unit will initially start the natural cooling function. If the set room temperature cannot be achieved with this function for a prolonged period, the compressor starts. A mixer can only be used with natural cooling, and particularly in cooling mode on underfloor heating circuits, it keeps the flow temperature above the dew point. To ensure the transfer of the high cooling output in active cooling at all times, no mixer is provided. Cooling function Natural cooling Function description With natural cooling, the heat pump control unit regulates the following functions: Switching all necessary circulation pumps, diverter valves and mixers Recording all essential temperatures Dew point monitoring The control unit enables the natural cooling function if the outside temperature exceeds the cooling limit (adjustable). Control operated in weather-compensated mode when cooling via heating circuit (underfloor heating circuit). When a separate cooling circuit is used, e.g. a fan convector, then the control is room temperature-dependent. DHW heating by the heat pump is possible during the cooling operation. Carry out the diffusion-proof thermal insulation of all brine and cold water lines in accordance with standard practice to prevent condensation. Power supply (1/N/PE, 20 V/50 Hz) is required. Recommendation: Utilise the heat pump power supply from an onsite power distribution board. The maximum refrigerating capacity that can be transferred depends on the geothermal probe/geothermal collector system and the ground temperatures. For cooling, it is possible to connect either a heating/cooling circuit, e.g. underfloor heating circuit or a separate cooling circuit, e.g. a fan convector. Components required: Circulation pumps, diverter valves, mixers, sensors and a KM BUS interface to the heat pump control unit. The heat extracted from the heating/cooling circuit is transferred to the ground by a heat exchanger. This heat exchanger is connected in series and enables a system separation between the primary and the heating circuit. Thermally insulate all lines on site with vapour diffusion-proof material. Hydraulic connection, natural cooling function ii iu it iz ir M ue ur ie φ iw up M iq uq A Geothermal probe interface B Interface to heat pump primary circuit C Interface to heat pump/heating water buffer cylinder (secondary circuit) M io uz uu M A B C VITOCAL 00-G VIESMANN 5

54 Design information (cont.) Required equipment Pos. Description Natural cooling function (NC) All required components (with a suitably designed plate heat exchanger) for the cooling circuit must be provided on site. iq iw ie ir it iz iu ii io Three-way diverter valve Secondary cooling circuit pump Contact humidistat Primary cooling circuit pump Mixer motor - three-way mixer Frost stat Extension kit for NC Extension kit for heating circuit (cooling circuit) with mixer Motorised two-way valve, normally closed Cooling with an underfloor heating system The underfloor heating system can be used for heating and for cooling buildings and rooms. Underfloor heating systems are integrated into the brine circuit via a cooling heat exchanger. A mixer is required to match the cooling load of the room to the outside temperature. Similar to a heating curve, the cooling capacity can be matched exactly to the cooling load via a cooling curve and the cooling circuit mixer that is regulated by the heat pump control unit. Surface temperature limits must be maintained to observe comfort criteria and to prevent condensation. The surface temperature of the underfloor heating system in cooling operation must not fall below 20 C. Install a natural cooling contact humidistat (for capturing the dew point) in the underfloor heating system flow to prevent condensation forming on the floor surface. This safely prevents the formation of condensate, even if weather conditions change quite rapidly (e.g.during a thunderstorm). The underfloor heating systems should be sized in accordance with a flow/return temperature pair of approx. 14/18 C. The following table can assist in estimating the possible cooling capacity of an underfloor heating system. In principle, the following applies: The minimum flow temperature for cooling with an underfloor heating system and the minimum surface temperature are subject to the prevailing climatic conditions in the room (air temperature and relative humidity). These must therefore also be taken into consideration during the design phase. Estimating the cooling capacity of an underfloor heating system subject to floor covering and spacing between pipes (assumed flow temperature approx. 14 C, return temperature approx. 18 C; Source: Velta) Floor covering Tiles Carpet Spacing mm Cooling capacity with pipe diameter 10 mm W/m mm W/m mm W/m Details accurate for: Room temperature 25 C Relative humidity 60 % Dew point temperature 16 C Cooling with fan convectors Vitoclima 200-C (accessory) Cooling operation possible either via separate cooling circuit or via a heating/cooling circuit. For max. cooling capacity, select operating mode "Fixed value". Select an installation location where the heat pump can be easily connected. Consider the connection of the condensate drain to the domestic drainage system or routing the condensate to the outside of the building. Power supply (1/N/PE,20 V/50 Hz) required. When creating wall outlets, consider supports, lintels and sealing elements (e.g. vapour barriers). Only fit appliances to solid level walls. Never install appliances near heat sources or places subject to direct solar irradiation. Install appliances only in locations with good air circulation. Ensure easy accessibility for service. Output matching The output of fan convectors can be modified. By changing the terminal connections, of the available 5 speeds can be assigned to the three-stage speed selector of the fan convectors. The heating and cooling capacities available with the respective speeds are shown in the following table. 54 VIESMANN VITOCAL 00-G

55 Design information (cont.) Test conditions Cooling capacity: At 27 C room temperature, 48% relative humidity, cooling the cooling water from 12 to 7 C. Rated output: At 20 C room temperature, flow temperature 50 C. Sound pressure level Measured at a distance of 2.5 m with a room volume of 200 m and a reverberation time of 0.5 s. Speed-dependent heating and cooling capacities Type Fan speed Air flow Cooling mode Heating mode Sound rate Total cooling capacity Sensible cooling Flow rate Pressure drop Heating output Flow rate Pressure drop pressure level capacity m /h W W l/h kpa W l/h kpa db(a) V V V202H V V V V V V20H V V V V V V206H V V V V V V209H V V V Factory-set fan speed Sizing the cooling heat exchanger The following tables can be used to calculate the size of the required cooling heat exchanger. Recommendation for sizing the cooling system correctly: calculate the cooling load to VDI Brine/water heat pumps 1 C 20 C A B 10 C 12 C A Cooling circuit primary side (brine) B Cooling circuit secondary side (water) VITOCAL 00-G VIESMANN 55

56 Design information (cont.) List for selecting cooling heat exchanger for brine/water heat pump at brine 10/1 C, cooling system 20/12 C Heat pump Refrigerating Flow rate, cooling circuit Pressure drop, cooling circuit Part no. capacity Primary side (brine) Secondary side (water) Primary side (brine) Secondary side (water) Type kw m /h m /h kpa kpa Single stage heat pump BW BW BW Two-stage, both stages with the same output BW+BWS BW+BWS BW+BWS Two-stage, stages with different output BW+BWS BW+BWS BW+BWS Water/water heat pumps 14 C 22 C A B 10 C 12 C A Cooling circuit primary side (water) B Cooling circuit secondary side (water) List for selecting cooling heat exchanger for water/water heat pump at groundwater 10/14 C, cooling system 22/12 C Heat pump Refrigerating Flow rate, cooling circuit Pressure drop, cooling circuit Part no. capacity Primary side (water) Secondary side (water) Primary side (water) Secondary side (water) Type kw m /h m /h kpa kpa Single stage heat pump WW WW WW Two-stage, both stages with the same output WW+BWS WW+BWS WW+BWS Two-stage, stages with different output WW+BWS WW+BWS WW+BWS Swimming pool water heating Hydraulic connection, swimming pool Swimming pool water heating is effected hydraulically via the changeover of a second three-way diverter valve (accessory). If the temperature falls below the value set at the swimming pool thermostat (accessory), a demand signal is sent to the heat pump control unit via the external extension H1 (accessory). In the delivered condition, central heating and DHW heating have priority over swimming pool water heating. 56 VIESMANN VITOCAL 00-G

57 Design information (cont.) For more detailed information regarding systems with swimming pool water heating, see "Heat pump system examples". Sizing the plate heat exchanger 28 C 8 C Use only stainless steel heat exchangers (threaded) that are suitable for potable water for heating swimming pool water. Size the plate heat exchanger subject to the max. output and the temperature specified for the plate heat exchanger. 22 C 28 C The flow rate calculated during sizing must be maintained during the installation. External swimming pool for average water temperatures up to 24 C. A Swimming pool (swimming pool water) B Heat pump (heating water) Selection list, plate heat exchangers for swimming pools Heat pump type Output in kw Flow rate in m /h (for B15/W5) Swimming pool Heat pump (heating water) Single stage heat pump BW WW 121 BW WW 129 BW WW 145 Two-stage heat pump, both stages with the same output BW+BWS WW+BWS BW+BWS WW+BWS BW+BWS WW+BWS Two-stage heat pump, stages with different output BW+BWS WW+BWS BW+BWS WW+BWS BW+BWS WW+BWS Connection of solar thermal systems The installation of a Vitosolic solar control unit enables a solar thermal system to be controlled to provide DHW heating, central heating backup and swimming pool water heating. The heat-up priority can be selected individually at the heat pump control unit. Via the KM BUS certain values can be checked at the heat pump control unit. When there is a high level of insolation, all heat consumers can be heated to a higher set value, thereby raising the solar coverage. All solar temperatures and set values can be scanned and adjusted via the control unit. The operation of the solar thermal system will be suspended at collector temperatures > 120 C to prevent steam hammer inside the solar circuit (collector protection function). Solar DHW heating The solar circuit pump starts and the DHW cylinder is heated up, if the temperature differential between the collector temperature sensor and the cylinder temperature sensor (in the solar return) is greater than the start temperature differential set at the solar control unit. The heat pump will be prevented from heating the cylinder if the temperature at the cylinder temperature sensor (in the DHW cylinder, top) exceeds the set value selected at the heat pump control unit. The solar thermal system heats the cylinder to the set value selected at the solar control unit. For the aperture area that can be connected, see the "Vitosol" technical guide. Solar central heating backup The solar circuit pump and the circulation pump for cylinder heating start, meaning the heating water buffer cylinder is heated up, if the temperature differential between the collector temperature sensor and the cylinder temperature sensor (solar) is greater than the start temperature differential selected at the heat pump control unit. VITOCAL 00-G VIESMANN 57

58 Design information (cont.) Heating stops when the temperature differential between the collector temperature sensor and the cylinder temperature sensor (solar) is less than half the hysteresis (standard: 6 K) or when the temperature captured by the lower cylinder temperature sensor equals the selected set temperature. Solar swimming pool water heating See "Vitosol" technical guide. Sizing the solar expansion vessel Solar expansion vessel Construction and function With shut-off valve and mounting set. A solar expansion vessel is a sealed unvented vessel where the gas space (nitrogen filling) is separated from the space containing liquid (heat transfer medium) by a diaphragm and the pre-charge pressure is subject to the system height. A Heat transfer medium B Nitrogen filling C Nitrogen buffer D Safety hydraulic seal min. l E Safety water seal F Delivered condition ( bar pre-charge pressure) G Solar thermal system filled, without heat effect H At maximum pressure and the highest heat transfer medium temperature Specification a a b b Expansion vessel Part no. Capacity Ø a b Connection Weight l mm mm kg A R ¾" R ¾" R ¾" 9.9 B R R Details regarding the calculation of the required volume see "Vitosol" technical guide. 58 VIESMANN VITOCAL 00-G

59 Heat pump control unit 4.1 Vitotronic 200, type WO1A Structure and functions Modular structure The control unit is integrated into the heat pump. The control unit comprises a standard unit, electronics modules and a programming unit. Standard unit: ON/OFF switch Optolink laptop interface Operating and fault display Fuses Flow temperature Heating/cooling DHW Solar energy Information Select with 40 C i Programming unit: Easy operation through: Plain text display with graphic ability Large font and black & white depiction for good contrast Context-sensitive help Integral control of the solar thermal system in heat pumps with solar connection Removable programming unit; can be mounted on the wall with separate accessory With digital time switch Control keys for: Navigation Confirmation Help Extended menu Setting the: Standard and reduced room temperature Standard and second DHW temperature Operating program Time programs for central heating, DHW heating, DHW circulation and heating water buffer cylinder Economy mode Party mode Holiday program Heating and cooling curves Codes Actuator tests Displaying: Flow temperature DHW temperature Information Operating details Diagnostic details Information, warning and fault messages ( Functions Weather-compensated control of flow temperatures for heating or cooling mode: System flow temperature or flow temperature of heating circuit without mixer A1 Flow temperature heating circuit with mixer M1 Flow temperature of heating circuit with mixer M2 in conjunction with the extension kit for one heating circuit with mixer Flow temperature, separate cooling circuit Electronic maximum and minimum temperature limit Demand-dependent shutdown of the heat pump and pumps for primary and secondary circuits Adjustment of a variable heating and cooling limit Anti-seizing pump protection Heating system frost protection Integral diagnostic system Cylinder thermostat with priority control Auxiliary function for DHW heating (short-term heating to a higher temperature) Control of a heating water buffer cylinder Control of an instantaneous heating water heater Screed drying program Control for swimming pool water heating in conjunction with external extension H1 (accessory) External hook-up: Mixer OPEN, mixer CLOSED, operating mode changeover External demand (set flow temperature adjustable) and heat pump blocking; set flow temperature specified via external 0 to 10 V signal (with external extension H1, accessory) Data communication: Remote operation, remote setup and remote monitoring of the heat pump and heating system with Vitocom 00. Operation via the Vitodata 100 webserver integrated into the Vitocom, or via the central Vitodata 00 webserver with the additional option to configure all control parameters. Connection to the heat pump control unit via LON (with LON communication module, accessory) Remote monitoring and remote operation via GSM phone networks with Vitocom 100 Connection to the heat pump control unit via KM BUS The requirements of EN 1281 for calculating the heat load are met. To reduce the heat-up output, the "Reduced" operating status is switched to the "Standard" operating status if outside temperatures are low. According to the Energy Savings Order [Germany], the temperature in each room must be individually controlled, e.g. through thermostatic radiator valves. 4 Time switch Digital time switch Individual and 7-day program Automatic summer/winter time changeover VITOCAL 00-G VIESMANN 59

60 Heat pump control unit (cont.) Automatic function for DHW heating and DHW circulation pump Time, day and standard switching times for central heating, DHW heating, heating a heating water buffer cylinder and the DHW circulation pump are factory-set Switching times are individually programmable; up to 8 time phases per day Shortest switching interval: 10 minutes Power backup: 14 days Setting the operating programs The heating system frost protection (see frost protection function) applies to all heating programs. You can select the following operating programs with the program selectors: For heating/cooling circuits: Heating and DHW or heating, cooling and DHW For a separate cooling circuit: Cooling Only DHW; separate settings for each heating circuit The external operating program changeover is possible in conjunction with the external extension H1. If the heat pump is only required to operate for DHW heating, for example in summer, select operating program "Only DHW" for all heating circuits. Standby mode 4 Frost protection function The frost protection function will be started when the outside temperature falls below approx. +1 C. With active frost protection, the heating circuit pump will be switched on and the boiler water is maintained at a lower temperature of approx. 20 C. The DHW cylinder will be heated to approx. 20 C. The frost protection function will be stopped when the outside temperature rises above approx. + C. Heating and cooling curve settings (slope and level) The Vitotronic 200 regulates the flow temperatures for the heating circuits and cooling circuit in weather-compensated mode: System flow temperature or flow temperature of heating circuit without mixer A1 Flow temperature heating circuit with mixer M1 Flow temperature of heating circuit with mixer M2 in conjunction with the extension kit for one heating circuit with mixer Flow temperature, separate cooling circuit The flow temperature required to reach a specific room temperature depends on the heating system and the thermal insulation of the building to be heated or cooled. Adjusting the heating or cooling curves matches the flow temperatures to these conditions. Heating curves: The flow temperature of the secondary circuit is restricted at the upper end of the scale by the temperature limiter and the temperature set at the electronic maximum temperature limiter. Flow temperature in C Heating curve slope Outside temperature in C VIESMANN VITOCAL 00-G

61 Heat pump control unit (cont.) Cooling curves: The flow temperature of the secondary circuit is restricted at the lower end of the scale by the temperature set at the electronic minimum temperature limiter Outside temperature in C Cooling curve slope Flow temperature in C Heating systems with heating water buffer cylinder or low loss header If using hydraulic separation, fit a temperature sensor in the heating water buffer cylinder or low loss header and connect to the heat pump control unit. Outside temperature sensor Installation location: North or north-western wall of the building 2 to 2.5 m above the ground, for multi-storey buildings in the upper half of the second floor Connection: 2-core lead, length max. 5 m with a cross-section of 1.5 mm 2 (copper). Never route this lead immediately next to 20/400 V cables. Specification IP rating IP 4 to EN 60529; ensure through appropriate design/installation Permissible ambient temperature during operation, storage and transport -40 to +70 C Specification Vitotronic 200, type WO1A General Rated voltage 20 V~ Rated frequency 50 Hz Rated current 6 A Protection class I Permissible ambient temperature during operation 0 to +40 C Installation in living spaces or boiler rooms (standard ambient conditions) during storage and transport 20 to +65 C Setting range for the DHW temperature 10 to +70 C Heating and cooling curves setting range Slope 0 to.5 Level 15 to +40 K VITOCAL 00-G VIESMANN 61

62 Heat pump control unit (cont.) 4 Connection values of the function components Components Connected load [W] Voltage [V] Max. switching current [A] Primary pump/well pump (2) Secondary pump (2) Instantaneous heating water heater control, stage (2) Circulation pump for cylinder heating (on the heating (2) water side) or three-way diverter valve, heating/dhw heating NC signal control ("natural cooling") (2) Circulation pump, separate cooling circuit (2) and AC signal control (active cooling) Heating circuit pump A (2) DHW circulation pump (2) External heat source control zero volt contact 250 4(2) Central fault message zero volt contact 250 4(2) Primary pump, heat pump stage (2) Secondary pump, heat pump stage (2) Instantaneous heating water heater control, stage (2) Circulation pump for cylinder heating (on the heating (2) water side) or three-way diverter valve, central/dhw heating for heat pump stage 2 Cylinder primary pump (DHW side) (2) Circulation pump for DHW reheating (2) or Control of immersion heater EHE Heating circuit pump M (2) Total current max. 5() A 4.2 Control unit accessories Contactor relay Part no Contactor in small casing. With 4 N/C and 4 N/O contacts. With terminal strip for earth conductors. Specification Coil voltage Rated current (I th ) 20 V~/50 Hz AC1 16 A AC 9 A VIESMANN VITOCAL 00-G

63 Heat pump control unit (cont.) Contact temperature sensor as system flow temperature sensor Part no For capturing the system flow temperature. Ø Specification Lead length IP rating 2.0 m IP 2 to EN 60529; ensure through appropriate design and installation Viessmann Pt500 Sensor type Permissible ambient temperature during operation 0 to +120 C during storage and transport -20 to +70 C Cylinder temperature sensor Part no For DHW cylinders and heating water buffer cylinders. On-site extension of the connecting lead: 2-core lead, length max. 60 m with a cross-section of 1.5 mm 2 (copper) Never route this lead immediately next to 20/400 V cables Specification Lead length IP rating.75 m IP 2 to EN 60529; ensure through design/installation Viessmann Pt500 Sensor type Permissible ambient temperature during operation 0 to +90 C during storage and transport -20 to +70 C 4 Thermostat for controlling the swimming pool temperature Part no Specification Connection -core cable with a crosssection of 1.5 mm 2 Setting range 0 to 5 C Switching differential 0. K Breaking capacity 10(2) A 250 V~ Switching function with rising temperature from 2 to R Stainless steel sensor well R½ x 200 mm Contact temperature sensor Part no For capturing the flow and return temperature VITOCAL 00-G VIESMANN 6

64 Heat pump control unit (cont.) Specification Lead length IP rating 5.8 m, fully wired IP 2 to EN 60529; ensure through appropriate design and installation Viessmann Ni500 Sensor type Permissible ambient temperature during operation 0 to +120 C during storage and transport -20 to +70 C Mixer motor Part no The mixer motor is mounted directly onto the Viessmann mixer DN 20 to 50 and R ½" to 1¼". With system plug. For wiring on site Specification Rated voltage 20 V~ Rated frequency 50 Hz Power consumption 4 W Protection class II Protection IP 42 to EN 60529; safeguard through appropriate design and installation Permissible ambient temperature during operation 0 to +40 C during storage and transport -20 to +65 C Torque Nm Runtime for s 4 Extension kit for one heating circuit with mixer with integral mixer motor Part no KM BUS subscriber Components: Mixer PCB with mixer motor for Viessmann mixer DN 20 to 50 and R ½ to 1¼ Flow temperature sensor (contact temperature sensor), lead length 2.2 m, fully wired, for specification see below Connecting plug for the heating circuit pump Power cable (.0 m long) BUS cable (.0 m long) The mixer motor is mounted directly onto the Viessmann mixer DN 20 to 50 and R ½ to 1¼. Mixer PCB with mixer motor Power consumption 5.5 W IP rating IP 2D to EN ensure through appropriate design/installation Protection class I Permissible ambient temperature during operation 0 to +40 C during storage and transport 20 to +65 C Rated breaking capacity of the relay output for heating circuit pump sö 2(1) A 20 V~ Torque Nm Runtime for s Flow temperature sensor (contact sensor) Secured with a tie. 160 Specification Rated voltage 20 V~ Rated frequency 50 Hz Rated current 2 A Specification IP rating IP 2D to EN ensure through appropriate design/installation Sensor type Viessmann NTC 10 kω at 25 C Permissible ambient temperature during operation 0 to +120 C during storage and transport 20 to +70 C 64 VIESMANN VITOCAL 00-G

65 Heat pump control unit (cont.) Extension kit for one heating circuit with mixer for separate mixer motor Part no KM BUS subscriber For the connection of a separate mixer motor. Components: Mixer PCB for the connection of a separate mixer motor Flow temperature sensor (contact temperature sensor), lead length 5.8 m, fully wired Connecting plug for the heating circuit pump Mixer motor terminals Power cable (.0 m long) BUS cable (.0 m long) Mixer PCB Protection class I Permissible ambient temperature during operation 0 to +40 C during storage and transport 20 to +65 C Rated capacity of the relay outputs Heating circuit pump sö 2(1) A 20 V~ Mixer motor 0.1 A 20 V~ Required runtime of the mixer motor for 90 approx. 120 s Flow temperature sensor (contact sensor) Specification Rated voltage 20 V~ Rated frequency 50 Hz Rated current 2 A Power consumption 1.5 W IP rating IP 20D to EN ensure through appropriate design/installation Secured with a tie. Specification IP rating IP 2D to EN ensure through appropriate design/installation Sensor type Viessmann NTC 10 kω at 25 C Permissible ambient temperature during operation 0 to +120 C during storage and transport 20 to +70 C 4 Immersion thermostat Part no May be used as a maximum temperature limiter for underfloor heating systems. The temperature limiter is installed into the heating flow and switches the heating circuit pump OFF if the flow temperature is too high Specification Lead length 4.2 m, fully wired Setting range 0 to 80 C Switching differential max. 11 K Breaking capacity 6(1.5) A 250 V~ Setting scale inside the casing Stainless steel sensor well R ½" x 200 mm DIN reg. no. DIN TR or DIN TR Contact thermostat Part no May be used as a maximum temperature limiter for underfloor heating systems (only in conjunction with metallic pipes). The temperature limiter is installed into the heating flow and switches the heating circuit pump OFF if the flow temperature is too high. VITOCAL 00-G VIESMANN 65

66 Heat pump control unit (cont.) Specification Lead length 4.2 m, fully wired Setting range 0 to 80 C Switching differential max. 14 K Breaking capacity 6(1.5) A 250V~ Setting scale inside the casing DIN reg. no. DIN TR or DIN TR Vitotrol 200A 4 Part no. Z KM BUS subscriber A Vitotrol 200A can be used for each heating circuit in a heating system. Up to 2 remote controls may be connected to the control unit. Functions: Display of room temperature, outside temperature and the operating condition. Setting the standard room temperature (day temperature) and operating program via the standard display. The reduced room temperature (night temperature) is set at the control unit. Connection: 2-core lead, length max. 50 m (even if connecting several remote control units) Never route this lead immediately next to 20/400 V cables LV plug as standard delivery 20,5 Party and economy mode can be enabled via keys Only for heating circuit with mixer: Room temperature sensor for room temperature hook-up For room temperature hook-up, the Vitotrol 200A must be installed in the living space (lead room) Installation location: Weather-compensated mode: Installation at any point in the building. Room temperature hook-up: Installation in the main living room on an internal wall opposite radiators. Never install inside shelving units, in recesses, or immediately by a door or heat source (e.g. direct sunlight, fireplace, TV set, etc.). The integral room temperature sensor captures the actual room temperature and effects any necessary correction of the flow temperature as well as a rapid heat-up at the start of the heating operation (if suitably encoded). Specification Power supply via KM BUS Power consumption 0.2 W Protection class III IP rating IP 0 to EN 60529; ensure through appropriate design/installation Permissible ambient temperature during operation 0 to +40 C during storage and transport -20 to +65 C Set room temperature range to 7 C Room temperature sensor for separate cooling circuit Part no Installation in the room to be cooled on an internal wall, opposite radiators/heat sinks. Never install inside shelving units, in recesses, or immediately by a door or heat source (e.g. direct sunlight, fireplace, TV set, etc.). Connect the room temperature sensor to the control unit. 66 VIESMANN VITOCAL 00-G

67 Heat pump control unit (cont.) 80 Connection: 2-core lead with a cross-section of 1.5 mm 2 (copper) Lead length from the remote control up to 0 m Never route this lead immediately next to 20/400 V cables 20 Specification Protection class III IP rating IP 0 to EN 60529; ensure through appropriate design/installation Permissible ambient temperature during operation 0 to +40 C during storage and transport -20 to +65 C KM BUS distributor Part no For the connection of 2 to 9 devices to the KM BUS Specification Cable length.0 m, fully wired Protection IP 2 to EN 60529; safeguard through appropriate design and installation Permissible ambient temperature during operation 0 to +40 C during storage and transport -20 to +65 C 4 External extension H1 Part no Function extension inside a casing for wall mounting. Using the extension enables the following functions to be achieved: Cascade control for up to 4 Vitocal appliances Swimming pool water heating function Minimum boiler water temperature demand External blocking Set boiler water temperature specified via a 0-10 V input External heating program changeover Specification Rated voltage 20 V~ Rated frequency 50 Hz Rated current 4 A Power consumption 4 W Protection class I IP rating IP 2 Permissible ambient temperature during operation 0 to +40 C Installation in living spaces or boiler rooms (standard ambient conditions) during storage and transport 20 to +65 C Vitocom 100, type GSM Without SIM card Part no. Z With contract SIM card for the operation of the Vitocom 100 via mobile phone Part no. Z For further information regarding the conditions of contract, see the Viessmann pricelist. Functions: Remote switching via GSM mobile phone networks Remote scanning via GSM mobile phone networks Remote monitoring via SMS to 1 or 2 mobile phones Remote monitoring of additional systems via digital input (20 V) Configuration: Mobile phones via SMS Standard delivery: Vitocom 100 (subject to order with or without SIM card) Power supply cable with Euro plug (2.0 m long) GSM aerial (.0 m long), magnetic foot and adhesive pad KM BUS cable (.0 m long) VITOCAL 00-G VIESMANN 67

68 Heat pump control unit (cont.) On-site requirements: Good reception for GSM communication of the selected mobile phone operator. Total length of all KM BUS subscriber cables up to 50 m Specification Rated voltage 20 V ~ Rated frequency 50 Hz Rated current 15 ma Power consumption 4 W Protection class II Protection IP 41 to EN 60529; safeguard through appropriate design and installation Function Type 1B to EN Permissible ambient temperature during operation 0 to +55 C Installation in living spaces or boiler rooms (standard ambient conditions) during storage and transport -20 to +85 C On-site connection Fault input DE 1 20 V~ 4 Vitocom 00, type FA5, FI2, GP2 Part no: see current pricelist Type FA5 with integral analogue modem Type FI2 with integral ISDN modem Type GP2 with integral GPRS modem For up to 5 heating systems with one or more heat sources, with or without heating circuits downstream. In conjunction with Vitodata 00 For remote reporting, remote monitoring and scanning of faults and/ or data points via the internet For remote switching, remote setting of parameters and codes for heating systems via the internet Configuration The Vitocom 00 is configured via the Vitodata 00. Fault messages Fault messages are reported to the Vitodata 00 server. These messages are transmitted via the following communication services from the Vitodata 00 server to the configured control devices: Fax Text messages (SMS) to mobile phones to PC/laptop On-site requirements: Telephone connection Type FA5: TAE socket, coding "6N" Type FI2: RJ45 socket (ISDN) Type GP2: Adequate GPRS radio signal for the D2 [Vodafone] mobile network at the location where the Vitocom 00 is installed LON communication module must be installed in the Vitotronic appliance For further information regarding the terms of contract, see the Viessmann pricelist. Standard delivery: Standard module * (with 8 digital inputs, 1 digital output and 2 analogue sensor inputs) Type FA5: with integral analogue modem, Connecting cable for telephone socket TAE 6N, 2 m long Type FI2: with integral ISDN modem, Connecting cable with RJ45 plug for ISDN socket, m long Type GP2: with integral GPRS modem, Aerial with connecting cable, m long SIM card LON connecting cable RJ45 RJ45, 7 m long, for data exchange between the Vitotronic and Vitocom 00 Power supply unit * Power cable from the power supply unit to the standard module For standard delivery of packs with Vitocom, see pricelist. Accessories: Accessories Part no. Wall mounting enclosure for the installation of the Vitocom 00 module, if no control panel or electrical distribution panel is available 2 rows rows Extension module * 10 digital inputs (8 zero volt, two 20 V~) analogue inputs (2 can be configured as pulsed inputs) 2 digital outputs see the standard module for dimensions or 10 digital inputs (8 zero volt, two 20 V~) analogue inputs (2 can be configured as pulsed inputs) 2 digital outputs 1 M BUS interface with connection of up to, for example, 16 M BUS capable heat meters with M BUS slave interface to EN 144- see the standard module for dimensions Uninterruptible power supply unit * (UPS) * Mounting rail installation TS5 to DIN EN , 5 x 15 and 5 x VIESMANN VITOCAL 00-G

69 Heat pump control unit (cont.) Accessories Additional rechargeable battery pack * for UPS Recommended with 1 basic module, 1 extension module and all inputs allocated Required with: 1 standard module and 2 extension modules Extension of the connecting cable Installation spacing 7 to 14 m 1 connecting cable (7 m long) and 1 LON coupling RJ45 Installation spacing 14 to 900 m with plug-in connector 2 LON plug-in connectors RJ45 and 2-core cable, CAT5, screened, solid cable, AWG 26-22, 0.1 to 0.2 mm 2, external diameter, 4.5 to 8 mm or 2-core cable, CAT5, screened, wire, AWG 26-22, 0.14 to 0.6 mm 2, external diameter, 4.5 to 8 mm Installation spacing 14 to 900 m with socket 2 connecting cables (7 m long) and 2 LON sockets RJ45, CAT6 2-core cable, CAT 5, screened or JY(St) Y 2 x 2 x 0.8 Standard module (standard delivery): Part no and and on-site or on-site and on-site or on-site Specification Rated voltage 24 V Rated current Type FA5 600 ma Type FI2 500 ma Type GP2 500 ma Protection class II to DIN EN IP rating IP 20 to EN 60529; ensure through appropriate design/installation Function Type 1B to EN Permissible ambient temperature during operation 0 to +50 C Installation in living spaces or boiler rooms (standard ambient conditions) during storage and transport -20 to +85 C On-site connections: 8 digital inputs DE 1 to DE 8 Zero volt contact, 2-pole, 24 V, max. 7 ma 1 digital output DA1 Zero volt relay contact, - pole, changeover, 20 V~/ 0 V, max. 2 A 2 analogue inputs AE 1 and AE 2 For Viessmann Ni500 temperature sensors, 10 to 127 ºC ±0.5 K Power supply unit (standard delivery): Specification Rated voltage 85 to 264 V ~ Rated frequency 50/60 Hz Rated current 0.55 A Output voltage 24 V Output current 1.5 A Protection class II to DIN EN IP rating IP 20 to EN 60529; ensure through appropriate design/installation Potential separation primary/secondary SELV to EN Electrical safety EN 605 Permissible ambient temperature for operation with supply voltage U E -20 to +55 C 187 to 264 V Installation in living spaces or boiler rooms (standard ambient conditions) for operation with supply voltage U E 100 to 264 V -5 to +55 C Installation in living spaces or boiler rooms (standard ambient conditions) during storage and transport -25 to +85 C For further technical details and accessories, see the data communication technical guide. 4 LON communication module Part no PCB for data exchange For connecting one Vitocom 200 or 00 to the heat pump control unit. * Mounting rail installation TS5 to DIN EN , 5 x 15 and 5 x 7.5. VITOCAL 00-G VIESMANN 69

70 Heat pump control unit (cont.) LON connecting cable for data exchange between control units Part no Cable length 7 m, fully wired (RJ 45). 4 Extension of the connecting cable Installation spacing 7 to 14 m: 1 connecting cable (7 m long) Part no and 1 LON coupling RJ45 Part no Installation spacing 14 to 900 m with plug-in connector: 2 LON plug-in connector RJ45 Part no and 2-core cable, CAT5, screened, solid cable, AWG 26-22, 0.1 to 0.2 mm 2, external diameter, 4.5 to 8 mm on-site or 2-core cable, CAT5, screened, wire, AWG 26-22, 0.14 to 0.6 mm 2, external diameter, 4.5 to 8 mm on-site Installation spacing 14 to 900 m with sockets: 2 connecting cables (7 m long) Part no and 2 LON sockets RJ45, CAT6 Part no core cable, CAT 5, screened on-site or JY(St) Y 2 x 2 x 0.8 on-site and Terminator Part no pce To terminate the LON BUS at the first and last LON user. 70 VIESMANN VITOCAL 00-G

71 Keyword index A Active cooling...5 Air separator...12 Application procedure (details)...22 B Brine accessory pack...11 Brine distributor Geothermal collectors...1 Geothermal probes/geothermal collectors...14 C Central heating/central cooling...46 Connectable components... Connections on secondary side (two-stage heat pumps)...1 Connections on the primary side (brine/water) Single stage heat pump...26 Two-stage heat pumps...26 Connections on the primary side (water/water) Single stage heat pump...28 Two-stage heat pumps...29 Contact thermostat...65 Cooling Selecting a plate heat exchanger...55 Cooling circuit...47 Cooling curve Level...60 Slope...60 Cooling function...47 Natural cooling...5 Cooling mode Operating modes...47 Weather-compensated control...47 Cooling operation...47, 5 Types and configuration...5 Cooling water...45 Cooling with an underfloor heating system...54 Cooling with fan convectors...54 D Data exchange...69 Delivered condition...4 DHW cylinder...49 DHW demand...5 DHW heating Connection on the DHW side...49 Selecting a plate heat exchanger...51 Selecting a primary store system...51 Solar...57 Via an external heat exchanger...22 Dimensions...7 Diverter valve...19 Double U-shaped pipe probe...9 Dual mode operation...5 E Electrical connections...2 Electrical demand...22 Electricity meter...2 EnEV...59 Ethylene glycol...6 Expansion vessel Calculating the volume...58 Primary circuit...40 Solar...58 Structure, function, specification...58 External extension H External heat source...5 F Fan convectors...19, 54 Federal tariffs [Germany]...22 Fill water...48 Flow rate...44 Frost protection...6 Frost protection function...60 Function description DHW heating...49 Heating circuit...46 Heating water buffer cylinder...47 Instantaneous heating water heater...5 Power-OFF...24 G Geothermal collector Manifolds and headers...6 Pressure drop...8 Sizing...8 Geothermal probe Pressure drop...40 Sizing...40 Groundwater...4 H Heat exchanger, primary circuit...45 Heating circuit and heat distribution...46 Heating curve Level...60 Slope...60 Heating lance...51 Heating output...4 Heating water buffer cylinder...47 Heating water flow temperature...46 Heat load...4 Heat pump control unit Functions...59 Programming unit...59 Standard unit...59 Structure...59 Heat pump sizing...4 Heat transfer medium...16, 4 Hydraulic connection Cooling function...5 Primary store system...50 Hydraulic connections...26 Hydraulic connection set...48 I Immersion thermostat...65 Installation accessories Primary circuit...11 Secondary circuit...17 Instantaneous heating water heater...5 K KM BUS distributor...67 L LON...69 LON communication module...69 VITOCAL 00-G VIESMANN 71

72 Keyword index M Minimum clearances...2 Mixer extension Integral mixer motor...64 Separate mixer motor...65 Mixer extension kit Integral mixer motor...64 Separate mixer motor...65 Mono-energetic operation...5 Mono-mode operation...4 Motorised ball valve...19, 22 N Natural cooling...5 O Operation Dual mode...5 Mono-energetic...5 Mono-mode...4 Output diagrams...8 Output matching, fan convectors...54 Outside temperature sensor...61 Oversizing...4 P Positioning...22 Power-OFF...22, 4, 48 Power-OFF period...22, 48 Power-OFF time...4 Power supply...22 Power tariffs...22 Pressure drop in the pipework...41 Primary pump...12 Product information...4 Pump output supplements...4 T Technical connection requirements...2 Temperature sensor Outside temperature...61 Room temperature...19, 66 Thermostat Contact temperature...65 Immersion temperature...65 Time switch...59 Tyfocor...4 U Underfloor heating...54 V Vitocom 100, type GSM , type FA5, FI2, GP Vitotrol...66 Volumes in pipes...4 W Wall clearances...2 Water Board...9 Water quality...48 Weather-compensated control...47 Operating programs...60 Weather-compensated control unit Frost protection function...60 R Required equipment...26, 50, 54 Return well...44 Room temperature sensor...19, 66 S Safety equipment block...18 Secondary pump...17 Sizing the heat pump...4 Sizing the heat source Brine/water heat pumps...6 Water/water heat pumps...4 Solar central heating backup...57 Solar DHW heating...57 Solar expansion vessel...58 Solar swimming pool water heating...58 Solar thermal system...57 Specification...5 Standard delivery...4 Standard heat load of the building...4 Supplement for DHW heating...5 Supplement for setback mode...6 Supply well...44 Swimming pool water heating...56 System separation...44 System versions VIESMANN VITOCAL 00-G

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76 Printed on environmentally friendly, chlorine-free bleached paper Subject to technical modifications. Viessmann Werke GmbH&Co KG D-5107 Allendorf Telephone: Fax: Viessmann Limited Hortonwood 0, Telford Shropshire, TF1 7YP, GB Telephone: Fax: VIESMANN VITOCAL 00-G