something new in the air Technical Bulletin ehpoca AIR-WATER HEAT PUMPS For winter heating, summer cooling and the production of domestic hot water

Transcription

1 something new in the air ehpoca Technical Bulletin AIR-WATER HEAT PUMPS For winter heating, summer cooling and the production of domestic hot water

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3 3 Innova is a company operating in the renewable energy sector and develops advanced climatic comfort systems for every season. The technological solutions it employs combine excellent functional aspects with minimum environmental impact. The quality and durability of our products are guaranteed by the continuous improvement of our working practices (Kaisen method) and by using the best materials. TABLE OF CONTENTS PAGE 1 Certifications Description Range System layouts Components Constructive features Technical data Tables on performances in conditions different from nominal ones Operating limits Flow rate/available pressure head diagrams at the maximum and medium pump speed Circulation pump operating times Outdoor unit noise levels Hydraulic circuit Indoor unit dimensions Outdoor unit dimensions Connections Length and height differences of refrigerant connection Positioning Electrical connections Anti-legionella... 1 System components and description of parts Controller setting Auxiliary heater management Accessories Ehpoca technical specifications CERTIFICATIONS This unit complies with the European Directives: Low voltage 006/95/EC; Electromagnetic compatibility 004/8/EC; Restriction of the use of certain hazardous substances in electrical and electronic equipment 00/95/EC (RoHS); Waste of electrical and electronic equipment 00/96/CE (WEEE). And subsequent amendments. DESCRIPTION INVERTER HEAT PUMP Ehpoca is a reversible cycle heat pump for: winter heating, the production of domestic hot water and summer cooling. To run and control the speed of the compressor and the outdoor fan, the machine uses DC INVERTER technology (high-performance permanent magnets motor with power and speed control and a pulse modulation electronic device: PWM acronym for pulse with modulation). Ehpoca comprises two units: the outdoor unit is very similar to that of an air conditioner, while the indoor part consists of a wall device similar to an independent boiler. The two units are connected through copper pipes for the refrigerant. ENERGY SAVINGS DC Inverter heat pumps offer a high level of energy saving in terms of both heating and domestic hot water production. The heat pumps working with DC Inverter technology guarantee high COP (coefficient of performance) values even at low outdoor temperatures. In comparison with a fuel system (common boilers), the cost of power for the whole winter season can be to 3 times lower. Moreover, energy is also saved in the production of domestic hot water. 3

4 4 INDOOR UNIT High thermal exchange efficiency brazed plate heat exchanger. High residual pressure head circulation pump. 6 litre expansion vessel. Safety valve. Differential pressure switch for water circulation security. Easily accessible air relief valve. Refrigerant connections and hydraulic connections in ideal position. Easily accessible electric panel. Frame support wall bracket to position the unit more easily. Centre control with possibility of integrating and coordinating operation of a support boiler. Domestic hot water and heating differentiated control. Possibility of connecting electric support resistors. OUTDOOR UNIT Compressor with high efficiency (DC) permanent magnet motor. Compressor and fan electronic speed control. PWM (pulse with modulation). Electronic expansion valve. Airfoil axial fans. Optimised defrosting program. EHPOCA E-TANK In order to exploit all the capabilities of heat pumps in producing domestic hot water, it is necessary to consider the fundamental principles on which they operate. A heat pump is, indeed, a heat generator that differs from a traditional combustion boiler. The traditional water cylinders with a heat exchanger to transfer heat between the water circulating inside the boiler and the domestic hot water are completely inappropriate for use with heat pumps. In traditional cylinders, the internal heating coil, if connected to a heat pump, inevitably leads to a reduction of the exchanges as the temperature in the tank rises (as the heat exchange is a function, mainly, of the temperature differential between the two fluids and of the exchange surface). This limits the power which the heat pump can supply and thus considerably prolongs the time required to reach the usage temperature. The most immediate drawbacks when using traditional boilers are: a reduction of domestic hot water availability and a limitation to the heating or cooling capacity. In ehpoca e-tank, domestic hot water circulates in an instantaneous heat exchanger consisting in a finned copper pipe submerged in the tank. This heat exchanger has a very large surface that guarantees excellent heat transmission from the "technical" water inside the storage tank to the domestic hot water, and thus ensures the constant supply of hot water for normal household consumption. Thanks to the fact that domestic water circulates only inside the heat exchange coil, the likelihood of the building up of bacterial colonies (Legionella) is practically nil, different from what happens with traditional boilers. The intermediate connectors make it possible to connect average temperature heating terminals such as radiators (for instance, the heated towel rails installed in bathrooms) without need to increase the system s temperature and the consequent reduction of the heat pump s SCOP. The tank s standard configuration includes a coil heat exchanger for connection to solar panels (for which the company supplies the connection control unit with circulation pump and electronic controls, upon request). This coil is mounted under a panel that, at its centre, contains a stratifying pipe that ensures considerable efficiency in the exploitation of this energy. 3 RANGE Single-phase indoor units 8 MI 1 MI 15 MI Three-phase indoor units 15 TI 18 TI Three-phase indoor units with resistor 15 TIR 18 TIR Single-phase outdoor units 8 ME 1 ME 15 ME Single-phase indoor units with resistor 8 MIR 1 MIR 15 MIR Three-phase outdoor units 15 TE 18 TE 4

5 5 4 SYSTEM LAYOUTS The system layouts implemented with Innova ehpoca heat pumps meet every heating and cooling requirement. The ehpoca electronic control is set up to integrate electric resistors or a standard boiler, if needed. Among the available accessories, there are DHW cylinders which, aside from connecting to ehpoca, can also be connected to solar collectors. Radiant floor panels as well as other terminals can be used. LAYOUT 1 GENERAL EPHOCA SYSTEM A 9 I F F C 1 1 G H 1 D E 5 1 I 5 Key 1 Circulation pump 5 Check valve 8 Three-way diverter valve 9 External air probe DHW probe A Outdoor unit B Cooling line C LAYOUT EHPOCA COMBINED WITH AIRLEAF RS AND DHW SYSTEM A D E F G H I L C e-tank Inertial tank or hydraulic compensator AirLeaf RS Solar panels Floor system Bathroom fixture Boiler B F F F E D Key 1 Circulation pump Shutoff valve 3 Expansion vessel 4 Air release valve 5 Check valve 6 Thermometer 7 By-pass valve 8 Three-way diverter valve DHW probe A Outdoor unit B Cooling line C D e-tank E Inertial tank or hydraulic compensator F AirLeaf RS 5

6 6 LAYOUT 3 EHPOCA COMBINED WITH HEATING/COOLING FLOOR SYSTEM, BUILT-IN DEHUMIDIFIER AND DHW WITH SOLAR PANELS C A L B G M E D H Key Shutoff valve 3 Expansion vessel 4 Air release valve 5 Check valve 6 Thermometer 7 By-pass valve 8 Three-way diverter valve DHW probe A Outdoor unit B C D E G H L M Cooling line e-tank Inertial tank or hydraulic compensator Solar panels Floor system Bathroom fixture Dehumidifier LAYOUT 4 EHPOCA COMBINED WITH HEATING/COOLING FLOOR SYSTEM + AIRLEAF AND DHW WITH SOLAR PANELS A C L B G D E F F F H Key 1 Circulation pump Shutoff valve 3 Expansion vessel 4 Air release valve 5 Check valve 6 Thermometer 7 By-pass valve 8 Three-way diverter valve DHW probe 6 A B C D E F G H L Outdoor unit Cooling line e-tank Inertial tank or hydraulic compensator AirLeaf RS Solar panels Floor system Bathroom fixture

7 7 LAYOUT 5 EHPOCA COMBINED WITH INERTIAL TANK AND STORAGE TANK WITH BOILER A C I B E D Key 1 Circulation pump Shutoff valve 3 Expansion vessel 4 Air release valve 5 Check valve 6 Thermometer 8 Three-way diverter valve 9 To system DHW probe 11 Thermostatic mixer A Outdoor unit B Cooling line C D e-tank E Inertial tank or hydraulic compensator I Boiler 7

8 8 5 COMPONENTS OUTDOOR UNIT External panelling Compressor 3 Heat exchanger 4 Electric fan 5 Cycle reversal valve 5 INDOOR UNIT Air relief valve 7 Expansion vessel 8 Circulation pump 9 Water inlet Resistors manifold 11 Plate heat exchanger 1 Water pressure gauge 13 Differential pressure switch 14 Refrigerant connections CONSTRUCTIVE FEATURES PANELLING The unit is covered with steel sheet panels galvanised and painted in a kiln at 180 with epoxy powders (indoor unit) and epoxy polyester powders (resistant both to UV rays and outdoor climatic conditions) for the outdoor unit. These treatments provide them with high resistance to corrosion and erosion. The sheets of the frame are made of galvanised sheet-metal according to the standard UNI EN14. The structure has been designed to facilitate access to machine components for installation or maintenance. In all models, the compressor is covered with soundproofing material to reduce the noise level. COMPRESSOR The compressor used is the rotary type (rotating piston). These parts all have a variable volume thanks to the possibility of adjusting rotation speed. Rotary compressors are equipped with double piston with opposite eccentricity respect to the rotation axis. This feature provides the compressor with ideal balance thus drastically reducing vibrations and noise. Depending on the model, the compressors are powered with single-phase or three-phase voltage (see general technical data table). The motor connected to these compressors is hermetic (because all the components making them up are contained inside a hermetic casing) and direct current with a speed adjustable permanent magnet rotor. The refrigerant is R4A which guarantees a high energy efficiency level and no impact on the ozone layer. R4A is an environmental-friendly refrigerant containing no chlorine. The use of special anti-vibration systems ensures extremely silent operation. These components are housed in a specific compartment acoustically insulated by a 15 mm thick soundproofing mattress placed at the most sensitive points. The compressor is powered by an electronic power module providing perfect modulation of electric power (PWM) and of its supplied speed depending on the heating and cooling capacity and the required rotation torque. This appliance also contains a series of devices controlled by a specific software program to protect the motor against overloads, overvoltage, excessive temperatures or errors in the three-phase electric power sequence. These events all trigger specific alarms (see subsequent paragraphs) which must be followed by a careful analysis to find out the causes. 8

9 9 EXTERNAL HEAT EXCHANGER This is a coil made of copper pipes for the circulation of refrigerant and aluminium fins for heat exchange with air. The surface of the fins is treated to allow quick outflow of water when operating as an evaporator (heat pump cycle). Considering its operating principle, periodical cleaning (spraying with water) provides the machine with better performance and longer lasting durability. Filth on the fins reduces the effectiveness of the thermal exchange by effect of the thermal insulation which it entails. OUTDOOR UNIT MOTOR FAN The large diameter fan/s are the axial type. Model 8 is equipped with a single fan, while models 1, 15 and 18 are equipped with two fans one in front of the other. The special blade profile together with the low rotation speed provides a high air flow rate and extreme silent operation. The motor driving them is direct-current a permanent magnet rotor. This solution greatly keeps electric consumption down for high energy efficiency; this technology is taking the place of still widespread asynchronous motors with capacitor. Here again the fans should be cleaned periodically (at least every two years) to avoid filth build-up which would create an unbalance increasing vibrations and noise of the outdoor unit. ELECTRONIC EXPANSION VALVE This component is extremely important to optimise performance of the cooling circuit coupled with variable speed compressors. In fact the volume of the refrigerant circulating inside the circuit (proportional to the rotation speed of the piston or the scroll of the compressor) changes constantly depending on the heating or cooling capacity required and the thermohygrometric conditions of the outside air and system water. The amount of fluid which must expand is therefore not constant but anyhow its perfect balancing must be guaranteed to avoid excessive or insufficient supplies of the evaporator. In practice, the shrinkage of the cooling circuit cross-section which allows expansion of the refrigerant must be able to vary so that more or less fluid passes depending on the situation. The electronic expansion valve is made of a hole adjusted by a cursor which, by moving, enlarges or reduces its internal cross-section. This cursor (shaped like a quill) is driven by a DC step motor, controlled by the circuit board of the outdoor unit, depending on the difference between the saturation temperature of the evaporator and the intake temperature of the compressor (this difference is called "refrigerant overheating"). CYCLE REVERSAL VALVE This component reverses circulation of the refrigerant between the two exchangers (obviously circulation in the compressor is always the same). 3 As already described, this way the functions of the two heat exchangers are swapped: during summer cooling, the condenser (where the refrigerant transmits heat) is represented by the external copper/aluminium coil and the evaporator by the internal plate changer; in the winter heating cycle, roles are swapped and therefore the refrigerant condenses inside and evaporates outside. The importance of the reversal valve is also linked to winter defrosting phases which in these machines is implemented by cycle reversal. In winter, by having the overheated refrigerant flow inside the external heat exchanger and then letting it condense thaws the ice accumulated on the surface of fins. 9

10 LIQUID SEPARATOR Before being suctioned by the compressor, the refrigerant passes through the liquid separator. There can be circumstances especially linked to heavy-duty working limits in the winter cycle (heating) where part of the refrigerant is not able to completely evaporate before being suctioned. This can occur for example during a defrosting phase when, following a cycle reverse, the liquid accumulated inside the heat exchanger (remember that in the winter cycle it acts as a condenser and therefore accumulates a certain amount of fluid) is "thrust" towards the compressor intake (since, ensuing reversal of the cycle, the internal exchanger becomes the evaporator, therefore linked to suction of the compressor). The separator therefore keeps the liquid refrigerant from entering inside the compression parts which would create serious damage due to the fact that liquids cannot be compressed. A second important circumstance which can determine the return of the liquid to the compressor concerns excessive loads. This is why it is of the utmost importance to strictly abide by the refrigerant load requirements defined in the specific tables (see paragraph Refrigerant connections ). One testing element which makes this circumstance quite evident is the detection of a compressor discharge temperature (measured on its smallest pipe) much lower than normal values (from a minimum of 55 C to a maximum of 95 C depending on working conditions of the machine determined, in final analysis, by the system water temperature and that of the outside air). Another element which can point out excessive refrigerant loads with the consequent suction of liquid is the electrical absorption. If it is significantly higher than the values defined in the "partial load performances table", it is very likely that there is too much refrigerant. WATER CIRCULATION PUMP This is a centrifugal pump with asynchronous motor with capacitor. It is very silent though guaranteeing high flow rates and pressure heads (see flow rate diagram curves). Depending on the features of the system, the rotation speed can be adjusted at three values. As mentioned in the previous paragraphs, adequate water circulation is fundamental to avoid jeopardising machine operation. You must therefore pay the utmost attention to correctly assess system pressure drops to see whether they are compatible with the static pressure head of the pump. If in doubt, the systems to which the heat pump is connected should be dimensioned so as to obtain low pressure drops by possibly inserting hydraulic separators (strongly prescribed). In fact these devices guarantee a constant heat pump water flow even in the event of pressure drop variations in the system (due to the closure of zone valves, etc.). A flow rate higher than the nominal rate never entails a functioning problem for the unit. This situation is generally not recommended due to a greater and useless consumption of the circulation pump and noise induced in the pipes or terminals. Though as has already been emphasized, if in doubt, this situation is more advisable that an insufficient amount of water in circulation. RESISTOR MANIFOLD, SAFETY VALVE, RELIEF VALVE This steel device, protected against tinning to guarantee long durability, has been dimensioned mainly to be able to insert the auxiliary heating resistors. These components are supported by a threaded fitting screwed to the top of the manifold. The manifold also has the safety valve, for excessive system water pressure (set at 3 BAR), and the automatic relief valve, placed at the top, which perfectly evacuates air present in the system. As has been said, even though the air relief valve is automatic, it is always better to check that no air remains in the circuit by repeatedly switching the circulation pump on and off (to allow air to migrate towards the highest part where the relief valve is located). The water circulation pump is anchored to the bottom part. The various connected components and the manifold itself can be removed from the machine for repairs.

11 11 HYDRAULIC GROUP OF INDOOR UNIT The components of the hydraulic group are located in the indoor unit and allow heating, cooling and water circulation. We have already spoken sufficiently about the internal heat exchanger in the previous paragraph. INTERNAL HEAT EXCHANGER The internal heat exchanger is the high efficiency brazed stainless steel plate type. The refrigerant passes in the gaps between one plate and another in thermal contact with the water flowing through the adjacent channels (refrigerant passes through one half of the gaps and water the other half). As can be understood, the thermal exchange surface becomes very large thus guaranteeing excellent heat transmission. Its dimensioning guarantees low pressure drops both on the water side and refrigerant side optimising performance both of the refrigerant circuit and water circuit. SYSTEM WATER PRESSURE GAUGE A water pressure gauge on the control panel of the indoor unit indicates the water pressure in the system. Once the system has been filled and air has been completely released, make sure that pressure does not exceed 1.5 BAR with the machine in a standstill or in cooling mode. HEAT EXCHANGER WATER CIRCULATION DIFFERENTIAL PRESSURE SWITCH A differential pressure switch is connected to the inlet and outlet of the internal heat exchanger. Its operation is based on the principle by which the presence of an adequate water circulation in the plate heat exchanger determines a pressure drop (difference between water inlet and outlet). If no such pressure difference is detected, it means that circulation is insufficient and therefore the machine must be stopped to avoid serious damage. Especially during the summer cooling cycle (or the winter defrost phase) water could freeze in the heat exchanger causing irreparable damage to the cooling circuit in most cases. In fact, due to its greater volume, ice deforms and opens gaps between the plates allowing water to enter the cooling circuit and in the compressor thus damaging it irreparably. For correct operation, a water filter should be installed to be connected to the inlet pipe. Failure to comply with this prescription can cause irreparable damage to the plate evaporator. In fact filth inside the system could enter the heat exchanger. It is nonetheless useful to perform thorough cleaning cycles of the system, circulating abundant amounts of water and draining it before finally closing the fittings. ELECTRIC RESISTORS These electric heating resistors are built of stainless steel to guarantee long durability. The group making them up is composed of three distinct elements which are inserted differently for the heating mode or for production of domestic hot water. To avoid dangerous overtemperatures, besides the electronic temperature sensors which interact with the circuit board, a bulb thermostat with expanding liquid has been inserted which interrupts operation in case of malfunctioning of this electronic device. As a further safety feature, the intervention of this thermostat must be followed by a manual resetting from the electric panel which, before restarting the resistors, allows finding the cause which triggered the excessive temperature. 11

12 1 7 TECHNICAL DATA 8M 1M 15M 15T 18T PERFORMANCE Thermal capacity a kw Total absorbed power (including circulation pump) kw Cop Thermal capacity b kw Total absorbed power (including circulation pump) kw Cop Cooling capacity c kw Total absorbed power (including circulation pump) kw Eer Cooling capacity d kw Total absorbed power (including circulation pump) kw Eer INDOOR UNIT NOISE LEVEL (e) Sound power db(a) Sound pressure db(a) HYDRAULIC DATA Nominal water flow with heating data (30/35 C) l/h Useful residual pressure head kpa Pump absorbed power kw Hydraulic connections diameter " GAS ¼ Expansion vessel capacity l Minimum system water content l Minimum water inlet/outlet temperature difference C Maximum water inlet/outlet temperature difference C Minimum system hydraulic pressure bar Maximum system hydraulic pressure bar REFRIGERANT CONNECTIONS Refrigerant inlet connection diameter " SAE 3/8 3/8 3/8 3/8 3/8 Refrigerant outlet connection diameter " SAE 5/8 5/8 5/8 5/8 5/8 R4A refrigerant load kg ELECTRIC POWER SUPPLY Voltage V/50Hz N 400-3N Protective rating IPX IPX IPX IPX IPX INDOOR UNIT Width mm Height mm Depth mm Net weight kg Transported weight kg OUTDOOR UNIT Width mm Height mm Depth mm Net weight kg Transported weight kg Performance detected according to standard EN14511 (a) Ext.water T. 35 C/ext. air T. 7 C (b) Ext.water T. 35 C/ext. air T. -7 C (c) Ext. water T. 7 C/ext. air T. 35 C (d) Ext. water T. 18 C/ext. air T. 35 C (e) Detected in open field at 1 m. 1

13 13 8 TABLES ON PERFORMANCES IN CONDITIONS DIFFERENT FROM NOMINAL ONES HEATING PERFORMANCE T a Model Tae PH PA COP PH PA COP PH PA COP PH PA COP PH PA COP T. ae Outdoor T T. a Outlet water T PH PA Thermal capacity Absorbed power (including circulation pump) The data is calculated with external relative humidity of 85%. 13

14 14 COOLING PERFORMANCE T ae Model Ta PF PA EER PF PA EER PF PA EER PF PA EER PF PA EER T. ae Outdoor T T. a Outlet water T PF PA Cooling capacity Absorbed power (including circulation pump) The data is calculated with external relative humidity of 47%. 9 OPERATING LIMITS HEATING External temperature ( C) 0 Integration by resistor or boiler outlet 15 0 Outlet water temperature ( C)

15 15 DOMESTIC HOT WATER External temperature ( C) HP off. Heating through resistor or boiler outlet 40 Integration by resistor or boiler outlet 15 0 Domestic hot water tank temperature ( C) COOLING External temperature ( C) Outlet water temperature ( C) 5 0 FLOW RATE/AVAILABLE PRESSURE HEAD DIAGRAMS AT THE MAXIMUM AND MEDIUM PUMP SPEED EHPOCA 8-1 Hst (kpa) ,5 0,6 0,7 0,8 0,9 1 1,1 1, 1,3 1,4 1,5 1,6 1,7 1,8 1,9,1,,3,4,5 Q (m 3 /h) 15

16 16 EHPOCA 15 Hst (kpa) ,1 1, 1,3 1,4 1,5 1,6 1,7 1,8 1,9,1,,3,4,5,6,7,8,9 3 Q (m 3 /h) EHPOCA 18 Hst (kpa) ,5 1,6 1,7 1,8 1,9,1,,3,4,5,6,7,8,9 3 3,1 3, 3,3 3,4 3,5 Q (m 3 /h) 11 CIRCULATION PUMP OPERATING TIMES The default settings place the pump at energy saving for summer or winter modes. For heating or cooling, aside from being activated on demand by the temperature controller (in which the pump starts 30 seconds before the other outputs and shuts down 1 minute after them), the pump will also cyclically be switched ON for minutes and OFF for 15 when the temperature controller is satisfied. If the input for the TA selection, DHW only, is open, the pump will only perform cycles on demand by the controller. Continuous operation and only on demand by the controller activated by the technical assistance service by means of specific parameters are also possible. PUMP OPERATION 16

17 17 1 OUTDOOR UNIT NOISE LEVELS EHPOCA 8 EHPOCA 8 Sound power level Cooling 6.4 db(a) Sound pressure level Cooling 46 db(a), Heating 48 db(a) Conditions 1m in front and 1.5m high Sound power level (db) db(a) NC-70 NC-60 NC-50 NC-40 NC-30 NC Octave band frequency (Hz) Sound power level (db) Cooling Heating NC-70 NC-60 NC-50 NC-40 NC-30 NC Octave band frequency (Hz) EHPOCA 1 EHPOCA 1 Sound power level Cooling 70 db(a) Sound pressure level Cooling 5 db(a), Heating 53 db(a) Conditions 1m in front and 1.5m high Sound power level (db) db(a) NC-70 NC-60 NC-50 NC-40 NC-30 NC Sound power level (db) Cooling Heating NC-70 NC-60 NC-50 NC-40 NC-30 NC Octave band frequency (Hz) Octave band frequency (Hz) EHPOCA 15 EHPOCA 15 Sound power level Cooling 7 db(a) Sound pressure level Cooling 53 db(a), Heating 54 db(a) Conditions 1m in front and 1.5m high Sound power level (db) db(a) NC-70 NC-60 NC-50 NC-40 NC-30 NC Sound power level (db) Cooling Heating NC-70 NC-60 NC-50 NC-40 NC-30 NC Octave band frequency (Hz) Octave band frequency (Hz) 17

18 18 EHPOCA 18 EHPOCA 18 Sound power level Cooling 7 db(a) Sound pressure level Cooling 53 db(a), Heating 54 db(a) Conditions 1m in front and 1.5m high Sound power level (db) db(a) NC-70 NC-60 NC-50 NC-40 NC-30 NC Sound power level (db) Cooling Heating NC-70 NC-60 NC-50 NC-40 NC-30 NC Octave band frequency (Hz) Octave band frequency (Hz) Warnings The value obtained where the appliance is actually installed can be slightly higher than the values shown in these charts due to operating conditions, the structure of the building, background noise and other factors. Test results were obtained in an anechoic chamber. 13 HYDRAULIC CIRCUIT Key 1 System return temperature probe (adjustment) T1 Plate heat exchanger 3 System supply temperature probe (antifreeze) T 4 Manifold 5 Air relief valve 6 Safety valve (3 bar) 7 Pressure gauge 8 Circulation pump 9 Expansion vessel Differential pressure switch 11 Check valve (optional AI0331/) 1 Mesh filter (supplied) 13 Calibration valve 14 Three-way diverter valve (optional AI0606) 15 Shutoff valve 16 Resistor /4/6 kw (optional) 17 DHW storage tank temperature probe T3 A Water inlet B Water outlet C System (include puffer or hydraulic separat.) D Indoor unit E DHW tank F Possible support boiler 18

19 19 14 INDOOR UNIT DIMENSIONS OUTDOOR UNIT DIMENSIONS 8 MODEL MODELS G G A B C A B C H D H D E E F F I I L L M M 8M 1M 15M/T 18T DIMENSIONS A mm B mm C mm D mm E mm F mm G mm H mm I mm L mm M mm WEIGHT Net weight Kg

20 0 16 CONNECTIONS INDOOR UNIT OUTDOOR UNIT B A L I C D E F G H Zone set up for hydraulic connections and refrigerant lines Zone set up for electric connections M L B G C D E Key 1 Water supply 1 (1 1/4 for 18) Water return 1 (1 1/4 for 18) 3 3/8 liquid line 4 5/8 intake line 5 Electric connections DIMENSIONS B C D E F G Indoor unit mm 46,5 4 15,5 40, Key A B C D E F G H I L M Control connection socket between units Inspection panel Cover A Front part Bottom Pipe outlet Right Cover B Back 5/8 gas line 3/8 liquid line 17 LENGTH AND HEIGHT DIFFERENCES OF REFRIGERANT CONNECTION L H H1 L Maximum allowed length development L m 50 Elevation difference limit between units if the outdoor unit is placed higher H1 m 30 Elevation difference limit between units if the outdoor unit is placed lower H m 15 Length of 3/8 and 5/8 connection pipes without additional gas load m 30 Additional R4A load per pipe meter between 30 and 50 m g/m 40 It is not necessary to implement siphons on the cooling lines as the compressors of the outdoor units are equipped with oil separators. 0

21 1 18 POSITIONING INDOOR UNIT OUTDOOR UNIT Top view 501 mm > 0 cm > 0 cm > 0 cm > 1 cm > 15 cm Side view > 15 cm > 15 cm gravel 19 ELECTRICAL CONNECTIONS The power line must be dimensioned appropriately to avoid voltage drops or overheating of cables or other devices situated on the line. Refer to the table below for dimensioning data. The power line must be isolated from the rest of the building's electric mains by means of a circuit breaker switch suited for the absorption of the unit with a differential relay and a maximum calibration equal to that prescribed by the individual electric standards. The cable must be double insulated multicore mod. H05VVF for indoor installations and mod. H07RNF for outdoor installations in a cable duct, with a minimum cross-section of 4 mm. The electric power supply of the outdoor unit (single-phase or threephase) must be connected together with the electric power supply terminals of the indoor unit using appropriately sized cables to avoid voltage drops or overheating. 8M 1M 15M 15T 18T Voltage V/50Hz N 400-3N Maximum absorbed power (model without resistor) kw Maximum absorbed current (model without resistor) A Maximum absorbed power (model with resistor) kw Maximum absorbed current (model with resistor) A

22 Terminals Description Serial connection terminals 1 and of outdoor unit (by installer). The connection is not polarised. Preferably use a screened bipolar cable with a minimum 1- cross-section of 0.35 mm for the connection, keeping the power cables separated. If a voltage of 30V is applied by accident, the 0.5A fuse of the outdoor unit blows to protect the circuit board. Configurable input to activate Anti-legionella function (purchase and have installer connect a time programmer). By activating the Anti-legionella function, the controller is capable of automatically performing thermal disinfection procedures on DHW systems equipped with recirculation, considerably decreasing the risk of the presence and proliferation of bacteria responsible for Legionella. The many variables linked to implementation of the systems upon which our equipment is installed do not allow the risk to be fully excluded. The disinfection function can be activated by connecting a time programmer at the inlet with default value at :00 am the night between Sunday and Monday, as this is statistically the time in which it is less likely that the utilities are used. Its duration depends on the features of the system. The Legionella bacteria reacts differently depending on the maximum temperature reached in the loop and as the temperature increases, the time duration decreases. The default parameters set in the device are: set temperature > 60 C for a duration of hours, but other settings are possible taking the following rules into account: over 70 C disinfection takes 30 minutes, - between 65 and 70 C disinfection takes 60 minutes, - between 60 and 65 C disinfection takes minutes, - between 57.5 and 60 C disinfection takes 180 minutes, - between 55 C and 57.5 C disinfection takes 40 minutes. The controller indicates execution of the Anti-legionella function when the LED flashes, runs a check of the actual execution of the action based on the preset parameters and afterwards exits the function after a timeout of 5 hours. During execution of the Anti-legionella function, the cooling or heating requirements of the system are not met. In order to avoid burns should hot water be withdrawn during the thermal disinfection phase, it is recommended to insert anti-burn safety devices on each utility. Connection for TA selection, DHW only, by remote potential-free contact. Prevents operation of summer and winter adjustments, just leaving domestic hot 5-6 water production active. Indicated on the display by the or LED switching off. Connection for ON/OFF selection by remote potential-free contact. Places appliance in stand-by deactivating all adjustments and indicated on the display by off. In stand-by, the device runs the antifreeze function, based on the ALo threshold and the reading of the T and T3 probes, the triggering of which is indicated on 7-8 the display alternately by off and ALo. This input can be set by the Service Centre to enable/disable the DHW function (in this case the stand-by indicated on the display by off only occurs if the TA input is open simultaneously). Electric power supply 30V (max 3A) for or 3 point system/dhw diverter valve (available as accessory AI0606). If a -point valve is used, connect terminals and DHW temperature detection probe input to be positioned in storage tank probe holder and connected by installer (max distance 50m). External air temperature detection probe input to be positioned next to probe in front of external condensing unit coil and electrically connected by installer (max distance 50m) Normally open potential-free contact for support boiler (max A). 0 ANTI-LEGIONELLA By activating the Anti-legionella function, the controller is capable of automatically performing thermal disinfection procedures on DHW systems equipped with recirculation, considerably decreasing the risk of the presence and proliferation of bacteria responsible for Legionella. The many variables linked to implementation of the systems upon which our equipment is installed do not allow the risk to be fully excluded. The disinfection function can be activated by connecting a time programmer at the inlet with default value at :00 am the night between Sunday and Monday, as this is statistically the time in which it is less likely that the utilities are used. Its duration depends on the features of the system. The Legionella bacteria reacts differently depending on the maximum temperature reached in the loop and as the temperature increases, the time duration decreases. The default parameters set in the device are: set temperature > 60 C for a duration of hours, but other settings are possible taking the following rules into account: - over 70 C disinfection takes 30 minutes, - between 65 and 70 C disinfection takes 60 minutes, - between 60 and 65 C disinfection takes minutes, - between 57.5 and 60 C disinfection takes 180 minutes, - between 55 C and 57.5 C disinfection takes 40 minutes. The controller indicates execution of the Anti-legionella function when the LED flashes, runs a check of the actual execution of the action based on the preset parameters and afterwards exits the function after a timeout of 5 hours. During execution of the Anti-legionella function, the cooling or heating requirements of the system are not met. In order to avoid burns should hot water be withdrawn during the thermal disinfection phase, it is recommended to insert anti-burn safety devices on each utility.

23 3 1 SYSTEM COMPONENTS AND DESCRIPTION OF PARTS The system is composed of a metal structure enclosing all the operating parts inside a series of panels. Only the control panel can be accessed from the outside. The following devices are present on the panel: A B C D E General appliance disconnector. External heat pump operating indicator light. The units with resistor have an RO switch to disable the outdoor unit (resistor or support boiler) which must therefore only be done for special requirements in heating or DHW mode. Do not turn the switch off in cooling mode. The controller which regulates and coordinates all the main functions of the appliance. This device allows regulation and control of all main functions of the appliance. In standard operation, the water temperature detected by the probe inside the DHW tank appears on the display. The DHW + HEATING OR COOLING / STAND-BY / DHW ONLY switch, by which normal mode can be set (in which the controller performs all the functions available), DHW only (in which summer or winter regulation is inhibited leaving only the production of domestic hot water active) or to place the regulator in standby during periods in which the appliance is not used. In stand-by, the device runs the antifreeze function, based on the ALo threshold and the reading of the T and T3 probes, the triggering of which is indicated on the display alternately by off and ALo. The pressure gauge which views the water pressure of the system. Allows to check the correct water pressure inside the circuit. It must range from 1 to bar. A B C D E CONTROLLER SETTING USER INTERFACE The interface normally displays the water temperature in the domestic hot water storage tank and allows to perform all operations linked to use of the tool, and in particular: - To set the summer/winter operating mode; - To view and rearm alarm situations; - To check the status of resources (setpoints, temperatures, outdoor unit and auxiliary heater operating hours). Aside from that described in this chapter, many other settings implying an in-depth knowledge of the appliance and system to which it is connected are possible to avoid seriously damaging the appliance. It is equipped with a 3-digit display to view temperatures or parameters and possible alarms, 6 LEDs for the indication of the comma (between the second and third digit, only indicated in measurements below 0 C), summer/winter status, DHW call, outdoor unit consent and alarm indication. Based on the readings of the system return (t1) and DHW temperature probes (t3 viewed by default on the display), on the setpoints, on the external temperature detected by the probe t4 and on the status of the inputs, the circuit board performs all the thermostatic adjustments required to meet the heating, cooling or domestic hot water production requirements by acting on the relays available and, by means of a PLL logic, on the adjustment signal by the external condenser. The production of domestic hot water, which has priority over other adjustments, obliges the outdoor unit to operate with the heat pump up to the desired set point (by default at 45 C and adjustable between 30 and 50 C) and simultaneously activates the 3-way valve in order to hydraulically deviate the hot water produced in the DHW storage tank. This adjustment is indicated when the specific LED switches on. The function can be deactivated by the Technical Service and in this case the system return probe (t1) will be viewed automatically on the display and the DHW probe (t3) ignored. The cooling function, enabled by the specific switch on the control panel, by closing of the ON/OFF input and of the TA temperature control contact and selected by pressing the key, obliges, by means of a PLL logic which acts based on the actual difference between the temperature detected by the system water return probe and the setpoint SEt at 1 C (adjustable between and 0 C), the production of cold water in order to exploit Inverter regulation modulation to a maximum. The heating function, enabled by the specific switch on the control panel, by closing of the ON/OFF input and of the TA temperature control contact and selected by pressing the key, acts, by means of a double PLL logic which takes into account both the actual difference between the temperature detected by the system water return probe and the setpoint SEt at 40 C (adjustable between 0 and 50 C) and the external air temperature (climatic adjustment), so as to have the outdoor unit work with the heat pump exploit the modulation algorithm to a maximum and if needed to activate the auxiliary heater based on the adjustments foreseen in paragraph.. This adjustment is indicated when the specific LED switches on. The external condensing unit is enabled whenever there is a thermostatic request compliant with the integration or switching adjustments described in paragraph., and it is disabled in case of an alarm, indicated by the LED and indicator light on the control panel switching on. The adjustments are mutually exclusive and the setting remains memorised even in the event of a power failure. 3

24 4 3 AUXILIARY HEATER MANAGEMENT Aside from automatic intervention in the event of malfunctioning of the external condensing unit in winter and DHW mode, the function has 3 different activation algorithms of the K1 contactor, which pilots the auxiliary heater (only in units equipped with support resistor) and the support boiler contact, identical both in DHW and heating mode, which act independently one from the other: If the water detected by the inlet adjustment probe drops and remains for over 0 minutes* below a value double the set hysteresis, the controller activates the K1 contactor to integrate or switch* the heat pump. Integration Integra on or switching or switching with with timeout meout Water T. Setpoint Set- _hy Set- _hy SWITCHING INTEGRATION T>hto T<hto T>hto PDC Aux.. Hea ng PDC Aux. Hea ng. Time If a setpoint above 50 C* is set, the heat pump switches off and the K1 contactor is activated. When this function is active, the heat pump and auxiliary heater will never operate simultaneously. Commutazione resist./pdc per massima Switching for temp. water acqua temperature HIS > 50 C (sia sanit.che risc.) Aux. Hea ng PDC his-_hy his Set-_hY Setpoint Water T. If the external temperature detected by the probe t4 drops below -15 C* the controller will activate the K1 contactor switching to the heat pump. * This adjustment can be modified by the Service Centre. In units equipped with support resistor, three stages (, 4 or 6kW) can be connected depending on requirements and the electric power available. Switching for Commut.azione water temperature resist./pdc < -15 C per minima temp. esterna HOS Ext. air T. hos+ihy hos Aux. Hea ng Time SWITCHING PDC CLIMATE CONTROL ADJUSTMENT The adjustment makes it possible to create compensation algorithms for the winter setpoint, suitable for all installations, acting on the maximum (above which there is no longer a decrease in setpoint) and minimum external temperature values (under which the setpoint is maintained) and on the value of the setpoint off point delta. Climate control Regolazione adjustment Climatica Water T. _SP _SP-otS External T. oth otl 4

25 5 4 ACCESSORIES STORAGE TANK FOR EHPOCA E-TANK TOTAL INTEGRATED SYSTEMS e-tank is the synthesis of stratification with its hydraulic flue achieving the best performance from low energy outputs. The ehpoca e-tank (energy tank) has been specifically developed for use with heat pumps. ehpoca e-tank contains technical system water. Therefore there is no intermediate heat exchanger which prevents the heat pump from supplying all its power until it reaches the set point Domestic cold water inlet Vent 3 Domestic hot water supply 4 High temperature heat pump supply 5 Boiler supply 6 DHW probe 7 Medium temperature heat pump supply 8 Heat pump return 9 Solar probe Solar energy supply 11 Solar energy return 1 Boiler return 13 Thermometer 14 Heating system supply 15 Possible supplementary electric resistor 16 Heating and floor system supply 17 Floor system return Ehpoca e-tank features A Total capacity l Foamed hard PU insulation 50 mm Total height with insulation mm Maximum diagonal height mm Tank with 50 mm foamed hard PU insulation ø mm Lower heat exchanger m Coil water content l Absorbed power kw Necessary coil flow rate m 3 /h Heating water production 80 /60 C (DIN 4708) m 3 /h Pressure drops mbar Flange ø mm 90/0 90/0 Weight empty kg Max. heating operating pressure bar 3 3 Max. exchanger operating pressure bar 6 6 Max. storage tank operating pressure C K J I H G F E D C B O N M L DHW heat exchanger features 4 5 Heat exchanger surface m Coil water content l Absorbed power kw 80 0 Necessary coil flow rate m 3 /h 3.4 4,3 DHW production 80 /60 C (DIN 4708) m 3 /h.0.5 Pressure drops mbar Coefficient (DIN 4708) NL 0 33 Model A B C D E F G H Model I J K L M N O

26 6 DIGITAL CONTROL UNIT FOR SOLAR PANEL SYSTEMS Description This device is a control unit to control thermal solar panel systems. Equipped with 3 Outputs ( load relays + 1 Alarm relay) and 3 Inputs (Probes) it can configure and manage up to 7 different solar panel systems. By selecting one of the 7 system layouts, the control unit will automatically manage the outputs and inputs of the chosen system. Furthermore the configuration of the hydraulic diagram of the system, the status of the outputs, the status of the probes and further information and data can be viewed on the backlit LCD display. Technical features Configurations SCH 01 Solar heating system with 1 tank, supplementary heating excluded. SCH 0 Solar heating system with 1 tank, supplementary heating included. TECHNICAL FEATURES Power supply Absorption Digital control unit 30V~ ±% 50Hz < VA Type of sensors 3 x NTC 5 C ±1% Sensor operating limits -50 C C (collector) -50 C.. +1 C (storage tank) Temperature reading range -0 C C Precision Resolution Offset ± C 0.1 C (-0 C C) 1 C (145 C C) on S1: ±5.0 C on S: ±5.0 C on S3: ±5.0 C Installer Password (default 0000) Acoustic Signals Back light switch-off Logic of OUT Relay Contact capacity On/Off (default On) 0 sec after last press NOR=N.O. REV=N.C. (default N.O.) x(1)a voltage-free contacts Protective rating IP 40 Operating temp. 0 C.. 40 C Storage temp. - C C SCH 06 Solar heating system with 1 tank and only probes. Connections TS1-TS-TS3 ΔT 1- TMC MTEN TM3 TAH TAF AFR Temperature of safety devices on probes Differential between probes S1-S Minimum collector temperature Enable/disable minimum temperature limitation Maximum temperature on probe S3 Integration temperature on probe S3 Antifreeze temperature Enable/disable antifreeze function ALARM S1 (or COL ), S, S3 are NTC temperature sensors. For the sensor S1, a probe must be used with range -50 C..+00 C (probe supplied with blue cable), while for the other sensors probes with range -50 C..+1 C can be used (probes supplied with yellow cable). If systems with solar panels are made, the probes corresponding to S1 and S3 must be exclusively with the range -50 C. +00 C. The outputs OUT1, OUT and the alarm output are voltage-free. It is recommended to apply a A 50V~ fuse on the power line of the control unit, which intervenes in case of short circuits on the loads. EARTH TERMINAL BOARD: Based on the control unit, there is a brass terminal board to connect the earth protective conductors of the various devices connected to the control unit. S FUSE A 6

27 C C bar C C bar 8 7 SOLAR UNIT Regulation unit for solar system complete with ogive connection kit for tube Cu Ø mm, flow regulator with calibration range 1 l/min with ½" cock to fill/drain/wash system, 3-speed pump (optional), ball valve 3/4 with thermometer and blue knob with removable integrated check valve. Safety unit with: pressure gauge 0- bar, safety valve 6 bar, flexible tube attachment to connect expansion vessel, ½" cock to fill/drain/wash system. Ball valve ¾ on system supply with thermometer and red knob with removable integrated check valve, supply pipe with built-in degasser and adjustable hand-operated 3/8 air relief valve. Black EPP insulation, 40 g/l density, consisting in front and rear shell and control unit cover. Maximum operating temperature C. Set up for insertion of 9 different control unit trademarks. Maximum operating pressure 8 bar. Supplied with wall support kit Flow regulator 1 l/min with ½" M cock to fill/drain/wash system Supply ball valve DN 0 with check valve 3 Return ball valve DN 0 with check valve 4 Supply pipe 5 Red handle 6 Blue handle 7 Thermometers 8 Caps 9 Safety unit with: pressure gauge 0- bar, safety valve 6 bar, flexible tube attachment, ½" M cock to fill/drain/wash system Wall support 11 Gasket kit 1 Pump in return 13 Insulation consisting in front and rear shells and control unit cover 14 Hose connection 15 Ogive connection kit for tube Cu Ø mm Pump characteristic curve (max. speed) - Pressure drops ΔP (m H O) 8 78,4 7 68, ΔP (kpa) Technical features 5 49,0 Digital control unit TECHNICAL FEATURES Check valve opening 350 mm HO Nominal diameter DN 0 - ¾" Max. pressure Max. temperature C Ball valve material OT 58 Check valve material OT 58 Insulation material Gasket material Unit height Insulation size 8 bar Black EPP 40 g/l Viton - Centellen 30 mm x360x mm , 9,4 19,6 9, Q (l/h) 7

28 8 MOTORISED THREE-WAY VALVE KIT FOR DOMESTIC HOT WATER 4 SERVOCONTROL The 3-point control without relay (diverter) for ON - OFF operation (all open or all closed) has a two-way electric motor. It can be powered at 30/1/4V AC, 50/60 Hz, has a manoeuvring time of 35 sec and a torque on the control rod of 11 Nm Protective rating: IP 65. Operating ambient temperature: minimum - C maximum 50 C VALVE BODY The 3-way full passage vertical valve is equipped with male connections with 1 swivel fittings used for models 8, 1 and 15. If removed, the diameter increases to 1 1/4 making the valve suitable for model 18. It is capable to operate in a temperature range from 7 C to 0 C and has a nominal operating pressure of 16 bar (which is the same maximum operating pressure differential supported by the valve). It can be used with water and fluids compatible with EPDM and TEFLON. 1 Body Ball 3 Sleeve 4 Control rod 5 Ball gasket 6 Rod gasket 7 Balance O-ring 8 Control rod O-ring The inside ball has 3 holes, one of which is positioned on the common route, which is therefore always open, the second directed on one of the two inlet routes and the third hole is positioned perpendicular to the second hole: orientation towards the other inlet route requires a 90 rotation. The 3-hole ball valve body has the characteristic of closing one inlet route while beginning to open another at the same time. For a short while, during the manoeuvre phase, all three routes are therefore intercommunicating. When the manoeuvre is finished, the valve goes back to being a diverter. Common route (always open) Common route (always open) Pressure drops Kv (m 3 /h with p = 0kPa = 1bar) = 16 The general expression (valid for water and technically similar fluids) for calculating pressure drops, knowing the flow rate value, is the following: Servocontrol opening routes A and C in communication Servocontrol opening routes B and C in communication Electrical connections TERMINAL BOARD HEAT PUMP Overall dimensions 3-WAY VALVE 1 neutral valve opening control 3 valve closing control DN Ø Ø1 A B C D E / The servocontrol, in the absence of electric power, remains where it is. Do not apply the phase to both terminals and 3! When the valve is completely closed, a power phase is available on terminal 5 (maximum load 1A resistive) to be used as remote control (to signal position, relay activation, pump, etc.) while vice versa with the valve completely open, the power phase is available on terminal 5. 8