Installation and maintenance

Transcription

1 Installation and maintenance CTS 700 by Nilan Compact P GEO 3 Compact Polar GEO 6 Version: 1.02, We reserve the right to make changes Page 1 of 40

2 Table of contents Table of contents... 2 General information before starting installation... 3 Safety... 4 Compact P... 5 The function... 5 Installing Compact P... 6 Condensation drain/water trap... 9 Water connection Power supply Duct connection Supplementary heating element DHW Fault finding Operation and maintenance Energy-saving tips for the optimal operation GEO 3 + GEO System construction Connection the heat pump Operation and maintenance Starting the heat pump Pressure in ground source loop (ground pipe) Filling the ground source loop with brine Water pressure in the central heating loop Filling water in the central heating loop Dirt filters in central heating and ground source loops Maintenance and Warranty Function Description Heat pump compressor Frequency-controlled compressor (variable capacity) Ground pipe and brine Condenser and heating circulation pump Permitted area of action for the heat pump Auxiliary heating Central heating Frost protection Event log Menu High pressure alarm Low pressure malfunction Leakage Installation Electrical connection GEO The heat pump must be connected to electrical installation by an authorised electrician Electrical connection GEO The heat pump must be connected to electrical installation by an authorised electrician Floor heating loop Ground source loop Testing for leaks: Brine filling Safety ground coil system Isolation of the tubes Drainage and collection tray Disposal of the heat pump Check list for brine/water pump system at start-up and commissioning Accessories / spare parts We reserve the right to make changes Page 2 of 40

3 General information before starting installation Check that the following papers have been supplied with the product: - Installation and maintenance (this document) - User manual - Wiring diagram Should you have any further questions concerning installation of the product after reading the guide, please contact your nearest Nilan dealer, by visiting The product is controlled by an CTS 700 control system, which provides a wide range of functions. Compact P is a heat recovery ventilation system with a capacity of up to 330m 3 /h at 100Pa external counter pressure. The system prioritises first the heat pump, second a 180-litre hot water tank and then intake air. The geothermal heat pump GEO is intended for heating homes with low-temperature heating systems with flow temperatures up to 45 C. Before the establishment of a geothermal system, it is important to obtain any potential permissions and approvals from the relevant authorities. The unit is supplied with integral G4 panel filter and humidity sensor. The unit can also be fitted with a pollen filter (accessory). This manual might describe functions and facilities that are not present in your system. IMPORTANT: If the plant is damaged in any way it must be inspected and repaired by an authorized person. We reserve the right to make changes Page 3 of 40

4 Safety Always disconnect the electrical supply to the heat pump if any malfunction occurs that cannot be remedied via the control unit. If any malfunction arises on the electrical part of the heat pump, always contact a licensed electrician to repair the fault. Avoid direct contact with the heating system pipes in the heat pump, as they can be very hot. Many types of antifreeze are hazardous to health, dangerous when ingested, and must be kept out of the reach of children. To protect the heat pump from damage, it is supplied with the following safety equipment: Expansion systems for central heating and brine/ground source loop Safety valves for central heating and brine/ground source loop Low and high-pressure cut-off switches for compressor Pressure guard brine loop/ground pipe (mandatory environmental pressure switch) Minimum/frost thermostat (cuts off the heat pump if the temperature becomes too low in the brine loop) The heat pump must be subjected to appropriate servicing in accordance with applicable laws and regulations so that the plant is maintained in a good condition and follow the requirements for safety and the environment. The responsibility for maintenance of the heat pump lies with the owner / user. The geothermal circuit contains antifreeze, which can damage groundwater if released. If you have any suspicions about leaks in your geothermal system, please contact an authorized service technician. We reserve the right to make changes Page 4 of 40

5 Compact P The function The installation of the plant must be performed by an authorized service technician or a field engineer who knows about heat pumps. Electrical installation/power supply (incl. Safety switch) must be installed by a certified electrician. The plant is connected according to the circuit diagram. The Compact P plant is a complete solution that ventilates the property and ensures a good indoor climate. Furthermore, the Compact P produces hot water. Unit components (function) The Compact P consists of a counter flow exchanger followed by a heat pump with a reversible cooling circuit. The unit draws the warm and humid air from moisture strained spaces, such as bathrooms, kitchens and utility rooms. The heat in the exhaust air flows through the counter flow exchanger, where it heats the fresh air and blows it into the rooms of the property, after. The energy that has not been utilized in the counter flow exchanger is recovered in the heat pump in order to produce hot water. When there is no need for the production of hot water, the heat pump can be used to heat the supply air as needed. During summertime, the heat pump can cool and dehumidify the warm air from outside in order to obtain a comfortable indoor climate. Figure 1: System build-up

6 Installing Compact P When installing the unit, it is important to take future service and maintenance into account. There should be a minimum clearance of 60 cm in front of the unit, measured from the Compact P front panel. When lifting the unit with straps it is important that the straps have an angle of maximum 45 C off perpendicular. Individual connectors have been marked out at the factory to facilitate installation. Please note the attached labels. The connectors should be connected to the duct system using flexible adapters (flex tube, soundproofed flex tube or similar). Figur 2: Duct Connections 1. Ø160 Udeluft Aussenluft Fresh air Air frais 2. Ø160 Tilluft Zuluft Inlet air Air pulsè 3. Ø160 Fraluft Abluft Exhaust air Air repris 4. Ø160 Afkastluft Fortluft Discharge air Air extrait We reserve the right to make changes Page 6 of 40

7 Figur 3: Sketch of Compact P The unit must be installed and leveled on a firm, vibration-free surface. There should be at least 10mm clearance to walls or other permanent installations. Although the unit itself is practically noise and vibration free, care must be taken to prevent any vibration from being propagated to adjoining parts of the building. The rear angular slide bar of the base frame of the Compact P can be removed in order to make it possible to push the unit towards the wall to hide water connections etc. It is important that the condensation outlet of the Compact P be connected to a drain. The unit is supplied complete with water trap. The outlet should be led frost-free with steady decline to the nearest drain. The safety valve overflow must also be led to a drain. If Compact P is enclosed by any covering, it must be possible to remove the covering easily. We reserve the right to make changes Page 7 of 40

8 TPanel T1: Outdoor air T2: Inlet air T3: Extract T4: Yield T5: Condenser T6: Evaporator T7: Supply air (after residual heating surface) T8: Supply air (before preheating surface) T9: On residual heat surface T11: Top of container T12: Bottom of container TPanel: CTS700 control panel T13: Brine, flow T14: Brine, return T16: Central heat, before condenser T17: Central heat, forward motion T18: Buffer tank, forward motion T20: Outside temperature T21: Hot-water tank, top T22: Hot-water tank, bottom T23: Evaporation temperature TPanel: CTS700 control panel Figur 4: Location of temperature sensors We reserve the right to make changes Page 8 of 40

9 Condensation drain/water trap Compact P is supplied with 20mm condensation outlet (PVC, GF fittings). The unit is also equipped with built-in water trap. The condensation outlet must be led frost-free with a steady decline of at least 1 cm/m to the nearest drain. The safety valve overflow must also be led to a drain. In order to prevent ice formation, it may be necessary to equip the condensation outlet with a heating cable where frost is possible Protecting the condensation outlet from frost is the responsibility of the fitter. We reserve the right to make changes Page 9 of 40

10 Water connection The inner tank surface is enamelled and the tank is equipped with a sacrificial anode. All connectors have 3/4 threads, with the exception of the anode access which is a 5/4 sleeve. All water pipes are connected to the bottom of the unit. If you wish, you can establish a hot water circulation system. Simply fit a return valve to the tank's circulation connector. If hot water circulation is not required, the connector and fitted blanking plug should be left untouched. Hot water circulation may result in considerable heat loss within the piping system. A large proportion of heat pump output may therefore be lost. To prevent heat loss, circulation and hot water pipes must be insulated with at least 30mm of mineral wool or other type of pipe insulating material. Figur 5: Location of sacrificial anode We reserve the right to make changes Page 10 of 40

11 Figur 6: Water connections 1. Tilslutning for cirkulationsrør ¾ Anschluss für zirkulationrohr ¾ Circulation pipe connection ¾ Branchement à tuyeau de circulation ¾ 2. Varmtvandsudtag ¾ Warm Wasser ¾ Hot water connection ¾ Sortie eau chaude ¾ 3. Koldt vandsindtag ¾ Kalt wasser ¾ Cold water connection ¾ Alimentation eau froide ¾ 4. Retur suppleringsspiral ¾ Rücklauf Sol ¾ Return supplementary coil ¾ Retour échangeur supplémentaire¾ 5. Fremløb suppleringsspiral ¾ Vorlauf Sol ¾ Inlet supplementary coil ¾ Alimenration échangeur supplémentaire ¾ Supplementary coil is standard only in the Compact P Sun and Compact P Cool Sun unit type. We reserve the right to make changes Page 11 of 40

12 Power supply Power supply including safety switch must be installed by an authorized electrician. The Comfort-unit must be connected according to the attached electrical chart. The unit is delivered with 3 m test cable for the CTS 700 panel. The panel should be connected to the CTS 700 control in the unit with cable type cat 5e twisted in pairs. (Maximum length 20m). The CTS 700 panel must be placed dry and frost-proof. The panels integrated feeler prevents further cooling of the building if the primary heat-supply stops by stopping the ventilation if the panel feeler gets below a specific value. (Factory setting is 10 C; the value can be set from 1-20 C.) Figure 7: CTS 700 control If a water heating element is installed in the system, the regulation vent must be connected electrically as described in the enclosed wiring diagrams. We reserve the right to make changes Page 12 of 40

13 Duct connection Ducting and fittings with rubber seals of tightness class B are recommended. It is also advisable that all duct connections to Compact P be made with approx. 1m of soundproofed flex tube in order to dampen sound emission. Ducting should be cut to length using a hacksaw or angle grinder and laid in accordance with the design drawing. Ducting is usually either attached to rafter feet using perforated strip or suspended in fitting strip. Avoid pinching the ducting in any way and any unnecessary bends. The ducting must be insulated. Sometimes, standard loft insulation can be used for the purpose. All ducting should be insulated with mineral wool to prevent heat loss and condensation. Such insulation requirements also apply to soundproofed flex tubing. It is recommended that two layers of 50mm insulating material be used. If ducting is installed in an unheated room, it is inadvisable to switch the system off for prolonged periods as air from heated rooms will rise into the ducting and condensate, thus possibly causing moisture problems. Loft insulation material Duct Granulate Figur 8: Insulation of ducting The discharge duct leads the exhaust air (from which the system has recovered the energy it contained) to the outside through the roof or outer wall. It is important that the roof stack or wall grille has at least the same area as the duct immediately ahead of the stack or grille. Any contraction will cause unnecessary pressure drop, which may reduce ventilation capacity. Holes for inlet and exhaust valves should be cut to fit the frame of the valve concerned. Secure the valve frame in position using screws and then attach the valve. Where the valves should be positioned depends on room design and use. It is, for example, inadvisable to install inlet valves immediately above where people usually sit as inlet air may sometimes be perceived as a draught. We reserve the right to make changes Page 13 of 40

14 Supplementary heating element DHW The hot water tank has a supplementary heating element of 1,5kW. The heating element can be activated and de-activated via the CTS 700 control, see the Settings Compac DHW settings menu. The temperature, at which the heating element should be active (T11), can be set in the Settings Compac DHW settings menu, see Directions for use of the CTS 700 control We reserve the right to make changes Page 14 of 40

15 Fault finding If problems arise during operation, please check the following before calling the service centre. Check that the alarm mark on the CTS 700 panel is displayed. If so, investigate the cause of the alarm and remedy the fault. If necessary, contact your local service centre. For details of alarms and how to reset them, please refer to the operating instructions for the CTS 700 controls. - Compact P is operating but with reduced output. Check that sufficient air is being supplied to Compact P. Check filters for excessive dirt accumulation. Check that valves are sufficiently open. In 98% of cases, the fault is caused by clogged filters. If necessary, increase the ventilation step. Any dampers to the open air should be shut at outdoor temperatures lower than 6 C. - Compact P is operating but there is no hot water. Check whether the tank has been emptied of hot water. If the system is equipped with a circulation pump but the circulation circuit has not been insulated, considerable heat loss may result, significantly reducing Compact P capacity. - Has the required water temperature (T12) (Not directly T12) been set correctly in the CTS controls? Usually, water temperature should be set to between C. Please refer to the CTS 700 operating instructions for details on checking and setting water temperature. Is the air supplied too cold or the quantity supplied too low? Check filters and valves. Check whether duct insulation is sufficient and complete. - Compact P is not operating. Check whether a fuse has blown. Check whether the hot water safety thermostat has cut out. If it has, press the button and the thermostat will cut in again once the water temperature has dropped C. If the thermostat continues to cut out, contact your local service centre. We reserve the right to make changes Page 15 of 40

16 Operation and maintenance At least every 3 months: The filters should be cleaned and renewed when needed. Usually the filters need to be renewed once every 3 month. The filter guard in the CTS 700 control can be used in order to make sure that the filters are checked. The filters can be cleaned by vacuuming or shaking them. Figur 9: Air Filter change Changing filters: 1. Loosen screws 2. Remove the filter hatch 3. Pull out the two filter frames for change/vacuuming Once a year: - The sacrificial anode must be checked to ensure that monitoring of the anode is intact. o The wire yellow/green is dismantled at the anode. This produces the Anode fail o The wire yellow/green is reassembled at the anode. Delete the alarm in the event log (reset). Delete is only for installation contractors. The hot-water tank can corrode if the anode is left unchanged. - The intake should be inspected and any uncleanness should be removed. - The evaporator should be inspected and cleaned. - It should be checked that the condensate has free passage through the water seal and the condensation drain. - The safety switch for the hot water tank should be controlled. - It is recommended to take out a subscription for service. We reserve the right to make changes Page 16 of 40

17 Tilbehør Zubehör Accessories Accessoires Figur 10: Safety Switch We reserve the right to make changes Page 17 of 40

18 Energy-saving tips for the optimal operation - Maintain a low temperature of the hot water. Try for example. at 45 C. - The auxiliary heating element should be cut off and only be used at very large hot-water demands. Please see CTS 700 directions - The ventilation speed should not be set higher than necessary. - Avoid hot-water circulation. - Spread out the bathing times as the Compact P needs 6-7 hours to heat the 180L water. - Insulate the ducting as prescribed. - Do not cool during winter time. We reserve the right to make changes Page 18 of 40

19 GEO 3 + GEO 6 System construction Electrical installation/power supply (including safety switch) should be installed by an authorised electrician. Connect the unit according to the wiring diagram supplied. Figure 71: Example of system design Function of ground source heat system The Geothermal heat pump GEO is designed for heating homes with low temperature heating systems with forward-flow temperatures of up to 45 C, for example floor heating systems. System components (function) The ground source heat system obtains heat from the ground through the ground pipe loop (3). The ground stores heat, which it accumulates from the sun in the summer and releases the heat to the ground pipe loop (3) in the winter. The temperature in the water/antifreeze mixture (= brine); from the ground pipes (1). Brine to be protected against freezing form a freezing point of -20 C to -18 C. To exploit the heat energy in the brine, the system uses a heat pump to transfer energy from a low temperature in the brine to a higher temperature in the central heating system. Circulation pumps (8) maintain flow in both the ground pipe loop (3) and the central heating/floor heating loop (10). The heat pump consists of an evaporator (4), compressor (5), condenser (6) and an expansion valve (7). These elements are connected and filled with a refrigerant in a closed cycle in a closed system. The antifreeze in the ground source loop is heated by the ground and cooled in the evaporator. After the evaporator the refrigerant is compressed in the compressor and the temperature and pressure of the refrigerant are increased. In the heat exchange process in the condenser, the refrigerant then releases heat energy to the central heating water, and the temperature of the central heating water rises. After the condenser the refrigerant pressure is reduced in the expansion valve, and the refrigerant continues into the evaporator where it cools the brine before flowing return into the ground pipe loop (2). An auxiliary heating element (9) is installed in the central heating loop, which can supplement the ground source loop in the event of particularly high heating demand. We reserve the right to make changes Page 19 of 40

20 Connection the heat pump Lable attached at the heat pump We reserve the right to make changes Page 20 of 40

21 Operation and maintenance When setting up the system, future service and maintenance should be taken into account. Minimum clearance in front of the system of at least 1m is recommended. Starting the heat pump Before starting the heat pump, check the following: Pressure in the central heating system, see Figure 13, point 17 Pressure in the ground heat exchanger system, see Figure 13, point 17 Check that both the central heating loop and the ground source loop have been ventilated. The central heating circuit has an excess flow valve or other circulation, which ensures the flow, see Figure 13, point 28 Check list for brine/water pump system at start-up and commissioning must be reviewed before starting. The heat pump can then be switched on at the safety switch. The heat pump is shut off at the safety switch. Figure 12: GEO installed with Compact P 1 central heating inflow - (3/4 ) 2 central heating return - (3/4 ) 3 brine inflow from ground pipe - (1 ) 4 brine return from ground pipe - (1 ) 5 safety valve - brine loop 6 manometer - brine loop Delivered loosely with GEO - safety valve and manometer for central heating loop We reserve the right to make changes Page 21 of 40

22 Pressure in ground source loop (ground pipe) The pressure must be inspected as often as several times a day in the initial days. If necessary, the system must be topped up with brine. See Figure 13, point 17 Brine pressure will stabilise after a few days and inspection can then be reduced to once a month. It is important that brine pressure is correct. Too little pressure in the ground source loop can/will trigger the alarm device in the ground source heat system. (low pressure) Brine may have to be added a couple of times during the first year in connection with ventilation of the ground source loop. Filling the ground source loop with brine The brine in the ground source loop comprises water and antifreeze. Ethanol, IPA alcohol, ethylene glycol or propylene glycol. The heat pump is equipped with a low-pressure switch, which ensures that the brine never becomes so cold that it freezes solid, and thus the ground source heat pump's heat exchanger is protected against frost damage. The frost protection mixture must be adapted to the operating temperatures in the ground source loop. It is very important that the frost protection fluid is mixed thoroughly before it is added to the ground source loop as no mixing takes place in the ground pipes. Failure to do so increases the risk of the heat pump freezing, thus creating a potential risk of frost damage. Brine may only be added/topped up by an authorised technician. Before loading, check that the ground coils are tight. How to fill brine into the ground source loop before start: The heat pump and circulation pump is switched off at the main switch before filling brine / antifreeze in the system There blocked on one valve at the circulating pump in the collector circuit Figure 13, point 18 Using a combined mixing and aeration tank equipped with a powerful filling pump filled brine of geothermal loop through filling taps Figure 13, point 13, until the geothermal pipe is vented. Duration at least 1 hour. Shut-off valve at the circulating pump in the collector circuit Figure 13, point 18, opened again and the heat pump section is filled and vented now, as ground circuit If brine has to be repeatedly added to the ground source loop, this indicates that the ground pipes are leaking. ALWAYS contact an authorised service technician immediately if you suspect leakage. Water pressure in the central heating loop The water pressure in the central heating loop must initially be inspected as often as several times a day. Top up the system with water, if necessary, see Figure 13, point 13 The water pressure will stabilise after a few days and inspection can then be reduced to once a month. If you have to add water to the central heating loop beyond the start-up phase, the system must be checked for leaks. We reserve the right to make changes Page 22 of 40

23 Filling water in the central heating loop Switch off the heat and circulation pumps at the main switch. Fill water into the central heating loop via the filler cock, Figure 13, item 13, until the correct water pressure is achieved, Figure 13, item 17 The automatic vents on the heat tank, central heating loop, etc., are activated automatically when water is added to the system. Add water to the system until the water pressure is correct. If the water pressure disappears entirely during filling, filling must be restarted right from the beginning. Restart the heat pump at the main switch. Dirt filters in central heating and ground source loops Immediately after the heat pump has been commissioned, a certain amount of dirt can accumulate in both loops. The dirt filter is located in the central heating string and in the ground pipe string outside the heat pump, as shown in Figure 13 The filters must be checked and cleaned several times daily after installation of the heat pump until the filters remain clean. In normal operation of the heat pump, it should be sufficient to check the filter twice a year. Cleaning the dirt filters: o o o o Switch off the heat pump at the main switch. Close the shut-off valves on each side of the filter. Pull out filter and rinse until clean. Replace the filter and open the shut-off valves. Then switch on the heat pump at the main switch. Maintenance and Warranty The heat pump must undergo appropriate service in accordance with applicable laws and regulations in order to keep the plant maintained in good condition and to fulfill demands on safety and environmental compliance. It is recommended that the owner / operator immediately after commissioning of the facility shall consult with a qualified service technician about the scope and frequency of servicing. The responsibility for maintenance of the heat pump is for the owner s / user s. Geothermal circuit containing coolant that can harm groundwater by leakage. Immediately contact a qualified service technician by suspected leaks in your geothermal system. The installer of heat pump is obliged to provide an assurance to the owner / operator in accordance with applicable laws and regulations. For specific warranty terms refer to the owner / user agreement with his supplier. A prerequisite for warranty obligation is that servicing and maintenance is carried out as described. We reserve the right to make changes Page 23 of 40

24 Function Description Heat pump compressor The system is protected with high and low-pressure switches that can stop the compressor and trigger an alarm. By heating demand the heat pump compressor starts when the temperature has dropped to setpoint minus the neutral zone. When the compressor is operating the central heating temperature is raised up to the respective set point before it goes out. The neutral zone helps to avoid frequent start / stop. The heat pump control has a restart time and a minimum time (see under HEAT PUMP) which likewise limits the number of starts/stops of the compressor Frequency-controlled compressor (variable capacity) The frequency is controlled by a PI regulator. The PI regulator parameters are set in the GEO menu. OTo avoid frequent ON / OFF couplings on the compressor because of the large hysteresis on central heating temperature, the compressor starts only when the PI controller's capacity reaches above 30%. The compressor stops when PI regulator capacity falls to under 1%. If the compressor continues to start/stop at short intervals, it may be necessary to set a wider neutral zone (in the Temperature / Regulate deadband Menu). The heat pump control has a restart time and a minimum time (see under GEO) which likewise limits the number of starts/stops of the compressor Ground pipe and brine The brine pump always runs with the compressor and starts 1 minute before and runs 1 minute longer. After a week of inactivity, the pump starts briefly to prevent blockage. The environmental pressure switch triggers an alarm and stops the system if there is a leak in the brine system. Condenser and heating circulation pump The system has a water-cooled condenser with a circulation pump. To prevent excessive condenser pressure in the event of failure of the high pressure switch, hot water is circulated in the central heating system until the temperature falls below the set maximum value for the compressor, before the compressor is started. After a week of inactivity, there is a brief periodic test run. In addition the pump has the following operating modes, which depend on the overriding control mode: - Winter operation: The pump runs constantly. - Summer operation: The pump is inactive (except for brief periodic test run). We reserve the right to make changes Page 24 of 40

25 Permitted area of action for the heat pump - Brine temperature to the evaporator from ground hoses -5 C to +20 C - Central heating flow temperature +24 C to +55 C It is recommended to use GEO for central heating systems with a flow temperature of 30 C to 45 C, to obtain an energy-efficient operation and less wear on the heat pump compressor. Installation location: - Room temperature 5 C to 35 C and a relative humidity of 30-70% Auxiliary heating A 2.0 kw electric water heater is connected as a supplement to the heat pump, in the event that it cannot supply the desired heating, for example, in cold and windy weather. The auxiliary heating must be released for operation by the user. The auxiliary heating is activated if the forward water temperature falls below the minimum set value (minus neutral zone). The system thus ensures that the heat pump supplies the greatest share of energy. At the same time, the user, even during extraordinary demand, is ensured a well-defined comfort. The heat pump is delivered with optional additional heating turned off (OFF) as factory setting. The auxiliary heating will also be used as a reserve supply and to maintain normal comfort in situations where the heat pump is not operating due to installation work, a fault, etc. Under these circumstances, the compressor settings are overridden so that the auxiliary heating is not controlled by minimum values. Central heating During regular heat pump operation, compressor capacity is adjusted thus maintaining a predetermined central heating temperature in the house. The required central heating temperature depends on the heating demand in the house, which in turn depends on its size, insulation and the outside temperature. Several different temperature compensation modes can be selected. These can be activated separately or simultaneously. Pump control It is important that there is a physical circulation in the central heating circuit and that this operates together with the pump control. Input T9 A pressure controlled valve e.g. Danfoss ADVO only functions if it runs on a constant RPM control. Make sure that the central heating system (e.g. the central floor heating system) is applied on a potential free input on CTS 700 to start/stop the heat pump. If input is not applied CTS 700 solely has to operate the heat pump. The central floor heating control must not start/stop the central heating pump directly! Mentioned below are examples using pump graphs for a Grundfos Alpha pump with different installations of the pump control. We reserve the right to make changes Page 25 of 40

26 Fixed pace: Run step 3 or a constant RPM control in the step that secures a circulation at a minimum of 20% of the design flow when there is not a heating need from the central heating system. Auto. Can be used if there is a fixed circulation. Do not work for a pressure controlled circulation valve. Proportional pressure. Can be used if there is a fixed circulation. Do not work for a pressure controlled circulation valve. Constant pressure. Can be used if there is a fixed circulation. Do not work for a pressure controlled circulation valve. Circulation is set with a minimum flow of 20% of the design flow. We reserve the right to make changes Page 26 of 40

27 Frost protection A number of functions are built into the system to prevent frost damage. These functions are always active regardless of the operating modes and settings selected (including OFF). Any missing or defective temperature sensors or system components can of course render this protection ineffective: - When the outside temperature falls below 2 C, the central heating circulation pump will start. With that, any spaces under the eaves and any attic space are secured and you can also monitor water temperature. - If the central heating or room sensors fall below 2 C, all circulation pumps will start, along with the heat pump and auxiliary heating, and temperatures will, if possible, be raised to 5 C. Pre-heating sanitary hot water When there is a requirement of heating the sanitary water the three- way valve position is changed and the supply water will be feed from the compressor condenser and supply system through the hot-water tank. In this situation the water is not circulated through the central heating system. Prioritising between the sanitary water and central heating is always done like this so the sanitary water has to be met before domestic heating can be produced. There are two set points for the sanitary waters temperature. One for the wanted water temperature to activate the compressor heating, and in addition one minimum temperature, where the supplementary heating becomes active. At this mode of operation it is obtained that the heat pump delivers energy as long as there is not drawn larger amounts of sanitary water from the tank. We reserve the right to make changes Page 27 of 40

28 Event log Menu The Event log displays any Event log and an alarm overview for the Event log. If an alarm is triggered, an alarm icon will show on the display. Menu: Information Event log The alarm is displayed with an alarm code. To approve an alarm, press "Acknowledge" the individual alarm or "Acknowledge all alarms" Active alarms cannot be acknowledged before the system has registered that the alarm cause has been eliminated. There are three alarm levels: INFO : NOT CRITICAL : CRITICAL : General information for the user that does not affect operation. Given in the event of alarms, which permit continued operation with small inconveniences. This type of alarm means that operation stops entirely or is significantly reduced. High pressure alarm Refrigerant pressure in the condenser is too high. This is due to the fact that the heat pump cannot clear the heat it is producing. The central heating water is circulating too slowly. Possible causes: 1. Dirt filter in the central heating system is clogged 2. There is air in the central heating system ventilate the system 3. There is insufficient water in the central heating system. 4. The hot pump to the central heating system is not running. The pump should buzz quietly when operating Check 1 4 and correct the fault. Acknowledge the alarm by pressing the knob in the Alarm submenu when the alarm is displayed. Low pressure malfunction Refrigerant pressure in the evaporator is too low. This is due to the fact that there is not enough heat coming from the ground source loop. Either the brine is circulating too slowly or the brine is too cold when it returns from the ground loop. Possible causes: 1. There is air in the ground pipes ventilate the ground heat loop/ground pipes 2. There is insufficient brine in the ground pipes 3. The brine has frozen in the heat exchanger. The cold pump will be very hot 4. The cold pump to the ground pipes/ground source loop is not running. The pump should buzz slightly while operating Check 1 4 and correct the fault. Acknowledge the alarm by pressing the knob in the Alarm submenu when the alarm is displayed. Contact a service technician if the low pressure switch shuts down the system again after a few minutes. Don not attempt to start the system repeatedly, as this increases the risk of frost damage to the heat pump evaporator. We reserve the right to make changes Page 28 of 40

29 Leakage The pressure is too low in the ground pipes/ground source loop. This may mean that the ground pipes are leaking. Check the following: 1. Are all cocks open that should be open? 2. Is there enough brine in the system? Top up if necessary. Check 1 2 and correct the fault. Acknowledge the alarm by pressing the knob in the Alarm submenu when the alarm is displayed. Call a service technician if you cannot locate the fault yourself. We reserve the right to make changes Page 29 of 40

30 Installation GEO We reserve the right to make changes Page 30 of 40

31 Compact P SHW GEO Sensor T2 is placed in sensor pocket at the top of SHW We reserve the right to make changes Page 31 of 40

32 Compact P Solar GEO Sensor T2 is placed in sensor pocket in the Compact tank next to the T11 sensor Figure 13: Structural ground source pump system diagram. We reserve the right to make changes Page 32 of 40

33 Electrical connection GEO 3 The heat pump must be connected to electrical installation by an authorised electrician. 2x400V, 2L+N+PE, 13 A, 50Hz Standard Supply cable: 4x min. 1.5 mm², HO5W-F 3x230V, 3L+PE, 13 A, 50 Hz Supply cable: 4x min. 1.5 mm², HO5W-F 1x230V, L+N+PE, 20 A, 50 Hz Supply cable: 3x min. 2.5 mm², HO5W-F Option Option Supply cable is dimensioned according to existing local laws. As a standard the supply cable 4x1.5 mm² and the connection for 2x400 V, 2L+N+PE is delivered. The supplied electrical diagram shows how to connect the system to the grid. The variable heating temperature is based on the outside temperature, which is measured by the sensor T20 in the outside air duct. The outside air temperature compensation is adjustable in the PC-Software. Electrical connection GEO 6 The heat pump must be connected to electrical installation by an authorised electrician. 400/230 V 2L+N+PE, 16 A, 50 Hz Supply cable: 4x1.5mm², HO5W-F The supplied electrical diagram shows how to connect the system to the grid Floor heating loop IMPORTANT: An overflow valve must be installed (Figure 13, no. 28) in the floor heating loop with a fixed-speed circulation pump. Alternatively, individual thermostats must be installed to maintain sufficient flow. It is possible to connect an external run signal to the pump control unit (see wiring diagram) from eg a floor heating system. The controller works when "Input T9" is connected. After this the pump has to be switched on and off for central heating. We reserve the right to make changes Page 33 of 40

34 Ground source loop When setting up a ground source loop, there are a number of clearance requirements which must be complied with to ensure efficient and trouble-free operation. Furthermore, local authorities often stipulate their own requirements for installation and approval of the system before it is commissioned. We reserve the right to make changes Page 34 of 40

35 Figur 14: Eksempel på udlægning af jordslanger i samlebrønd Figure 15: Example of layout of ground pipes with collection inside footing. We reserve the right to make changes Page 35 of 40

36 Testing for leaks: As cracks in the pipes can occur during handling/transport, it is important to pressure test the pipes individually for leaks immediately before covering with earth. Testing for leaks should be carried out in accordance with the applicable regulations. Brine filling After completed and substantiated testing for leaks, the system can be filled with brine. Brine filling should be performed by an authorised technician. Brine can be purchased ready-mixed with corrosion inhibitors or the fluid can be mixed before filling. We recommend that you use ready-mixed brine containing corrosion inhibitors. If mixing the brine yourself, the water quality must be appropriate to brine and to the materials in the system. In the case of ready-mixed brine, product safety data sheets are enclosed which document the composition of the brine. Brine and water must be mixed thoroughly before filling; a bulk container can be used, for example. Use a powerful pump to remove air pockets from the ground pipes before filling them with brine. Calculate pumping time for filling the system at an established pumping rate. It will not take less than the calculated pumping time to fill the system with brine. Prevent air from entering the ground pipes during filling. Safety ground coil system The ground source heating pipes are equipped with a low pressure switch which triggers an alarm in the event of a fall in pressure in the ground pipe. In the event of an alarm, the system must be disconnected and prevented from restarting automatically. The ground pipe system must be dimensioned as a closed system with a standing pressure of kpa. Isolation of the tubes All piping to and from the ground tubes / geothermal heating circuit must be insulated up to the heat pump, so that no condensation occur on the cold pipes. Drainage and collection tray There may be advantageously established drains condensate from the heat pump and water from the safety valve during heat pump. It is mandatory to established collection tray at the safety valve on the collector side. Disposal of the heat pump Please contact your municipality or its authorized installer, when the heat pump must be disposed, as the heat pump and brine must be disposed in accordance with applicable laws. We reserve the right to make changes Page 36 of 40

37 Check list for brine/water pump system at start-up and commissioning The check list must be followed at start-up and commissioning of the complete heating system. Reference is made to the text in the manual for further details. Before the system is put into opereation the following item must be checked and notes made. Brine circuit Control Yes/No Memo Date Brine heat/source circuit is tight? Brinetype N/A Brine concentration % N/A % The brine concentrationen, freezing temperature (registered -20 C til -18 C) N/A C The brine is properly mixed prior to filling of the circuit? The brine cicuit is purge of air? The pressure of the brine circuit, bar gauge N/A bar Any leakage from the relief valve must be collected. Brine must not run into any sewers The brine circuit is connected correctly to the heat pump (which can be damage) Design flow of brine circuit N/A m 3 /h Actual flow brine circuit N/A m 3 /h There is risk of low pressure cut-out failures and risk of freezing the evaporator of the heat pump, if these instructions are not followed. We reserve the right to make changes Page 37 of 40

38 Central heating circuit Control Yes/No Memo Date The heating circuit is tight? The heating circuit is purged of air after filling the system Pressure of the heating circuit, bar gauge N/A bar The safety valve of the heating circuit is mounted correctly and has correct opening pressure The is a bypass, which ensures a sufficient flow through the condenser (eliminates HP cut-out) The circulation pump must be dimensioned for the specific installation The circulation pump is in constant operation or is controlled by the heat pump Strainer is mounted Strainer has been cleaned after circulation of water The design flow of the heating circuit N/A m 3 /h The actual flow of the heating circuit N/A m 3 /h Flow circuit with a closed central heating circuit. N/A m 3 /h We reserve the right to make changes Page 38 of 40

39 Electircal supply and controls Control Yes/No Memo Date The mains supply, protection and connection, must be according to the wiring diagram and manual. Chosen form of regulation in the control, fixed or variable heating temperature N/A Fixed Variabel Selected setpoint Elected curve for central heating temperature N/A C curve The ourdoor sensor is mounted when weather compensation is used (variable temperature of central heating). Central temperature compliance requirements for max. 45 C In case a remote running signal from the heat system is used, connection must be made and heat pump controller configured for this Supplementing electrical heating element is activated if required, after the system has been filled with water and put into operation The recommended seetings of the controls, described in the manual, are checked. Any adjustments are noted for later reference. The mains supply, protection and connection, must be according to the wiring diagram and manual. We reserve the right to make changes Page 39 of 40

40 GEO 3 with 3 kw HP out-put (acc. to EN14511, 0/35 C) Evaporator (brine circuit) Condenser (central heating circuit) Flow approx. 1.4 m 3 /h (0.39 l/s) 1.0 m 3 /h (0.29 l/s) Pressuredrop heat exchanger approx. 15 kpa 15 kpa Temperature change approx. 3 C 5 C A flow circuit at a minimum of 20% of the design flow. N/A 0.10 m3/h (0.03 l/s) GEO 6 with 6 kw HP out-put (acc. to EN14511, 0/35 C) Evaporator (brine circuit) Condenser (central heating circuit) Flow approx. 1,4 m 3 /h (0.39 l/s) 1,0 m 3 /h (0.29 l/s) Pressuredrop heat exchanger approx. 15 kpa 15 kpa Temperature change approx. 3 C 5 C A flow circuit at a minimum of 20% of the design flow. N/A 0.20 m3/h (0.06 l/s) Accessories / spare parts Filters Type Antal Nilan varenummer Filter G Pollen filter F Figur 16: Accessories/spare parts We reserve the right to make changes Page 40 of 40