EVI Split Combo Air to Water Heat Pump Service Manual
The EVI Split Combo Air to Water Heat Pump is a compact and efficient unit designed for both heating and cooling. This unit can be used for supplying sanitary hot water and house heating, and it can also be used with fan coil units. The unit features an electronic expansion valve, a water-side shell-tube heat exchanger, and an outdoor temperature probe for control and climatic compensation. The EVI Split Combo is reversible and can operate down to -20°C.
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Air to Water Heat Pump
EVI Split Combo Type
Service Manual
Before operation this product, please read the instructions carefully and save this manual for future.
Thank you for choosing our quality product.
Please read this manual carefully before use and follow the instructions to operate the unit in order to prevent damages on the device or injuries to staff.
Specifications are subject to change with product improvements without prior notice. Please refer to the specification sticker on the unit for upgraded specifications.
Heat pumps stand out for their compactness and high performances: operation down to ‐20’c. They are reversible and can be used for heating and for cooling in summer. They can also be used for fan coil units.
Heat pump has indoor unit and outdoor unit. Outdoor unit is connected to indoor module by copper connective pipe.
The outdoor unit has:
‐ Air‐side heat exchanger with copper pipes and aluminum fins, complete with grid protection.
‐ Axial fan
The inside unit has:
‐ Electronic expansion valve
‐ Water‐side shell‐tube heat exchanger complete with water‐flow‐switch.
‐ Outdoor temperature probe for control and climatic compensation of the water set point ( heat curve ).
‐ LCD controller with thermostat function, displaying and setting the operating parameters.
‐ Electronic control panel equipped with electrical terminal boards for connective external consents.
‐ Structure in painted galvanised stell complete with condensation tray.
‐ Compressor: scroll EVI hermetic compressor complete with thermal protection.
‐ Circulation pump
‐ Auxiliary electrical heater
‐ 3‐way‐water‐valve: the motorised reversal valve with connector for sanitary hot water tank
Optional:
‐ Buffer tank: used to limit operation of the compressor in short cycles and to provide a reserve for the defrosting phase on reversible air/water heat pump.
▌Working temperature range:
‐ in heating mode:
Outside air: ‐20 ~45
°C
Water: +18/+55’c
‐ in cooling mode :
Outside air: +15 ~45
°C
Water: +7/+25
°C
Maximum operating water pressure: 7bar.
When install the unit, be sure to check whether the selection of installation place, power supply specifications, usage limitation(piping length, height differences between indoor and outdoor units, power supply voltage and etc.) and installation spaces
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Content
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24‐25
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13‐14
7
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9
4 –5
6
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26‐28
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45‐46
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1 Safety precautions
If heat pump is not running in the winter, it is necessary to keep power supply connected for Anti‐freeze protection.
In cold weather (≤ 0°C), if heat pump is no longer needed, do drain out all the water inside the system.
1.1 Safety precautions
‐ Warning ‐ suggestion
Once abnormality like burning smell occurs, please cut off the power supply immediately and then contact with service center.
‐ prohibition
Be sure to pull out the power plug and drain the indoor unit and water tank when unit is not in use for a long time. Otherwise, the accumulated dust may cause overheating fire or freeze of water tank or coaxial heater exchanger in winter.
Make sure to use a dedicated power line for the heat pump only. Do not add other appliances to the line.
If the abnormality still exists, the unit may be damaged and electric shock or fire may result.
Before installation, please see if the voltage of local place accords with that on nameplate of unit and capacity of power supply, power cord or socket is suitable for input power of this unit.
Don't operate the unit with wet hand.
Otherwise, it may cause electric shock.
Before cleaning please cut off the power supply. Otherwise, it may cause electric shock or damage.
The power supply must adopt special circuit with leakage switch and enough capacity. It is mandatory to use a suitable circuit‐breaker for the heat pump and make sure the power supply to the heater corresponds to the specifications. Otherwise the unit might be damaged.
Never damage the electric wire or use the one which is not specified.
Otherwise, it may cause Overheating or fire.
The unit must be earthed to avoid any
risks caused by insulation defects.
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Please note whether the installation stand is firm enough or not.
Never insert any foreign matter into unit to avoid damage. And never insert your hands into the air outlet of outdoor unit.
Don't attempt to repair the unit by yourself.
If damaged, it may cause fall of the unit and injury of people.
Don't step on the top of the unit or place anything on it.
Never block the air inlet and outlet of unit.
Improper repair may cause electric shock or fire, so you should contact the service center to repair.
Keep pressurized spray, gas holder
and so on away from the unit above
1m. It may cause fire or explosion.
It may reduce efficiency or cause stop of the unit and even fire.
There is the danger of fall of things or people.
Select an installation place where noise and vibration when operation do not bother your neighbors.
Remove any snow from the units after snowfalls.
Make sure no water or other liquid drips into the electric box of the unit
Otherwise the unit might be damaged.
Check the water temperature before supplying any hot water or taking a shower. Could result in being burnt.
Do not touch the faucet while hot water is being supplied.
Could result in being burnt by hot water
Do not touch the relief valve, drainage pipe, drain outlet or drain elbow when inspecting the relief valve or while draining hot water.
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2 Working principle of a Heat Pump
(refrigerant circuit):
The refrigerant system consists of 6 main components:
EVI scroll type compressor, 4‐way‐valve, heat exchanger (condenser, refrigerant to water), electronic expansion valve, evaporator (air to refrigerant), Economizer.
Heat pump can absorb the heating from air source. This makes the heat pump a very environmentally friendly and
economically sound alternative for space heating.
* Evaporator: low temperature, low pressure refrigerant go through evaporator, to boil and turn from liquid to gas.
* Compressor: compressor absorb refrigerant, and compress to high temperature, high pressure status.
* Condenser: refrigerant release heat energy to heat exchanger. Refrigerant temperature reduces, and it returns from
gas status to liquid status.
The heat energy is absorbed by water, circulated by a circulation pump to indoor radiator or floor heating systems.
* EEV: at last the refrigerant go through the electronic expansion valve, where its pressure is reduced, and then continues to the evaporator.
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3 Explored view
3.1 indoor unit explored view
1 Economizer
2 Compressor
3 Heat exchanger (condenser)
4 Manometer
5 Manometer bracket
6 Accumulator
7 Left plate
8 Electrical control box
9 4‐way‐valve
10 Coil for EEV
15
16 controller
Controller bracket
29 Circulation pump
30 PCB
17 Return water connector 31
18 Top plate 32 Sensor
19 connector to water tank 33 Transformer
20 Connector to house
21 Return connector
22 Gas valve
23 Liquid valve
24 Right plate
11 Electronic expansion valve 25 Frame
34 Terminal
35 door
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12 filter
13 Front plate
14 Controller box
26 Electrical heater
27 3‐way‐water‐valve
28 Water‐flow‐switch
3.2 Outdoor unit explored view
1 Top panel
2 Separate panel
3 Evaporator
4 Motor bracket
5 Motor
6 Fan blade
7 Bottom plate heater
8 Left handle
9 Front panel
10 Plastic net
11 Near net
12 SPM module
13 Motor capacitor
14 Main circuit board
15 4‐way‐valve
16 4‐way‐valve coil
17 Sensor
18 Electronic expansion valve coil
19 Electronic expansion valve
20 Filter
21 Right panel
22 Right handle
23
24 Reactance
25 Copper pipe
26 Evaporator bottom heater
27 Compressor
28 Compressor heater
29 Gas connector
30 Liquid connector
31 Valve plate
32 Bottom plate
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3.3 main components
2 compressor
Pressure switch
3 Shell tube heat exchanger
Electronic expansion valve
Fan blade controller
evaporator
4‐way‐valve
Motor
Switch board
Main board
Room temp. sensor /
Outside air temp. sensor
Water tank/return/FEED/ temp. Sensor
3‐way‐water‐valve
Electrical heater and holder
Water flow switch
Circulation pump
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4. Applications
4.1 application: supply sanitary hot water, house heating
Recommended installation order:
1. Connect copper connective pipe between indoor unit and outdoor unit.
2. Connect indoor unit to the climate system, cold and hot water lines as well as any external heat sources.
3. Connect the load monitor, outdoor temperature sensor; any centralized load control and external contacts as well as the cable between outdoor units. .
4. Connect power supply to outdoor unit. .
Installation requirements
Max pressure for house heating
Highest recommended FEED / return temperature at dimensioned outdoor temperature
Max water outlet temperature with electrical heater
Max FEED line temperature with compressor
Min supply temperature cooling
Max supply temperature cooling
Max water flow for heat pump
Min water flow for heat pump
10kW 12kW 15kW
5 Bar
55/45°C
+65°C
+58°C
+7°C
+25°C
0.8l/s 1.1l/s 1.3l/s
0.4l/s 0.5l/s 0.6l/s
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5. Installation
5.1 installation plan
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5.2 Installation Outdoor Unit
Outdoor unit can be transported either vertically or horizontally. However it must be stored vertically and in dry conditions.
5.1.1 Select the Installation Place of Outdoor Unit
* The outdoor unit should be installed on a solid wall and fastened securely.
* The outdoor units should be installed close to the house, on a terrace, on the façade or in a garden. They are designed to operate in the rain but can also be installed under cover as long as there is sufficient ventilation. There should be no obstacles to hinder the free circulation of air to the exchanger inlet and outlet (see installation diagrams below).
* The emplacement of the outdoor unit should be carefully chosen and protected from prevailing winds in order for it to be compatible with environmental requirements: integration into the site, noise level.
* We particularly recommend:
• Not placing the outdoor unit close to sleeping areas
• Not placing it opposite a glazed wall
• Avoiding proximity to a terrace
* Moreover, we recommend positioning the unit above the average depth of snowfall in the region in which it is installed.
* It is necessary to provide clearance all around the appliance to carry out connection, commissioning and maintenance operations.
* The following procedure must be observed before connecting the pipes or electric cables.
1) Decide which the best position on the wall is and leave enough space to be able to carry out maintenance easily.
2) Fasten the outdoor unit support to the wall using screw anchors which are particularly suited to that type of wall.
3) Use a larger quantity of screw anchors than normally required for the weight they have to bear: during operation the machine vibrates and
Has to remain fastened in the same position for years without the screws becoming loose.
4) Mount the outdoor unit on the support using the four bolts supplied.
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* Please install the drain connector to the unit when necessary. In some cold areas
(temperature below 0°C), please don't use the
drain connector; otherwise it may clogged by ice.
5.3 Indoor Unit Installation
* It is recommended that indoor unit is installed in a room with existing floor drainage, most suitably in a utility room or boiler room.
* The surface must be firm, preferably a concrete floor or foundation.
* Install indoor unit with its back to an outside wall, ideally in a room where noise does not matter. If this is not possible, avoid placing it against a wall behind a bedroom or other room where noise may be a problem.
* The unit can be aligned using the adjustable feet.
* Route pipes so they are not fixed to an internal wall that backs on to a bedroom or living room.
* Ensure that there is approx. 500 mm free space in front of and 220 mm above the product for any future service.
Dimensioning expansion tank
The expansion tank’s volume must be at least 5 % of the total volume.
Example table
Total volume (l) Volume Expansion tank (l)
280 14
320
360
16
18
Initial pressure and max height difference
The initial pressure of the pressure expansion tank must be dimensioned according to the maximum height (H) between the tank and the highest positioned radiator, see figure. An initial pressure of 0.5 bars means a maximum permitted height difference of 5 m.
If the standard initial pressure in the pressure tank is not high enough it can be increased by filling via the valve in the expansion tank.
Any change in the initial pressure affects the ability of the expansion tank to handle the expansion of the water.
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5.5 Refrigeration Connection
5.5.1 Refrigeration connection
The commissioning of heat pump includes operations on the refrigeration circuit. Appliances must be installed,
commissioned, maintained and repaired by qualified, authorized personnel, pursuant to the requirements of prevailing directives, laws and regulations and in accordance with the codes of practice of the profession.
* Before shipped out from manufacturer, the indoor unit has been filled with refrigerant. Additional refrigerant may be filled when copper pipe is more than 5 meters. Outdoor unit do not have refrigerant inside.
* Check the liquid valve and the gas valve of the outdoor unit. The valves shall be completely shut off.
5.5.3 Refrigeration connection step
1. Connect the copper pipe to indoor unit.
2. Wipe the quick connectors with clean cloth to prohibit dust and impurity entering the pipes.
Align the centre of the pipe and fully screw in the angular nuts with Finger. connect other side of copper pipe to outdoor unit
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4. A vacuum pump and manifold gauge are needed.
Connect the pressure gauge to the vacuum pump.
Use Vacuum pump to remove the air from outdoor unit and copper pipe.
6. Use a 4mm hex wrench to open two valves of outdoor unit.
5. When vacuuming the outdoor unit and copper pipe, please turn on gas/liquid valve on outdoor unit ; but do not turn on gas/liquid valve on indoor unit, otherwise refrigerant leakage. Vacuum the unit for at least 15 minutes till negative value shown on the pressure gauge, and close the manifold gauge.
7. Remove the service pipe of pressure gauge. Put copper nut back. Tighten them with a wrench.
Connect the electric cable as per wiring diagram, and bundle it with the connecting pipe.
6. Use a 4mm hex wrench to open two valves of outdoor unit.
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8. After confirming that there is no leakage from the system, when the compressor is not in operation, charge additional R410a refrigerant with specified amount to the unit through the service connector on liquid valve.
Be sure to charge the specified amount of refrigerant in liquid state to the liquid pipe. Since R410a is a mixed refrigerant, adding it in gas form may cause the refrigerant composition to change,
preventing normal operation.
5.5.4 Return refrigeration
If heat pump want to disconnect. Please return refrigerant R410a from outdoor unit back to indoor unit as following:
Run heat pump on ROOMCOOL operation mode.
4‐way‐valve switch ON, circulation pump switch ON, compressor start, fan start.
1. Remove the cap of two valves on indoor unit with the spanner.
2. Tighten the core of the liquid valve (the smaller one) with valve key at first. After about 20 seconds,
you can hear a special sound from compressor; tighten the core of the gas (the bigger one) with valve key.
3. Press to stop heat pump.
4. Tighten the cap of two valves.
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6. Loose the nut of the connect pipe to the outdoor unit valve with 2 spanner, disconnect the connect pipe and the two valves.
5.5.2 Maximum distances and quantity of refrigerant fluid to be loaded
5kW 7kW 10kW 12kW 15kW 18kW
Ø gas pipe 1/2 " 5/8" 5/8" 3/4" 3/4" 3/4"
Ø liquid pipe 1/4 " 3/8" 3/8" 1/2" 1/2" 1/2" max pipe length 20 m 20 m 20 m 20 m 20 m 20 m
The refrigerant R410a inside heat pump is suitable for 5 meter copper pipe. If the refrigerant link between outdoor unit and indoor unit is more than 5 meter,
Please fill 10g per meter for 5kW, 7kW; 30g per meter for 9kW, 12kW, 15kW, 18kW.
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5.6 Electrical connection
Electrical installation and service must be carried out under the supervision of a qualified electrician. Electrical installation and wiring must be carried out in accordance with the stipulations in force: maximum amperage on the outdoor unit
(thermodynamic unit). See the table below, distance of the appliance from the original power supply, upstream protection, and neutral operating conditions.
1.It is recommended to use a suitable breaker for the heat pump and make sure the power supply to the heater
Corresponds to the specifications.
Otherwise the unit might be damaged.
2.The power supply to the heat pump unit must be grounded.
3.Cable should be fixed tightly, to ensure it won't get loosen.
Connecting power supply
Incoming power supply cable is connected to terminal block from top cable clamp.
The cable must be dimensioned according to the applicable norms.
Connect the power cable as following:
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Connecting signal supply from indoor unit to outdoor unit
Connect cable on outdoor unit
Connect cable on indoor unit
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When the cable is connected to terminal, a screwdriver is used to open the terminal, see figure :
Connect room/outdoor temperature sensor
5.4 Room temperature sensor installation
When customer choose fan coil mode, he should install the room temperature senor as following:
1. Take the room temperature sensor out from the indoor unit.
2. Distance between the indoor unit and the remote room temperature senor should be less than 15 meter due to length of the connection c able of remote air temperature sensor.
3. Height from floor is approximately 1.5 meter;
4. Remote room temperature sensor can not be located where the area may be hidden when door is open;
5. Remote room temperature sensor can not be located where external thermal influence may be applied;
6. Remote room temperature sensor should be installed where space heating is mainly applied;
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5.7 Pipe connection
5.7.1 General
Pipe installation must be carried out in accordance with current norms and directives. Heat pump can operate with a return temperature of up to 50°C and outgoing temperature from the unit of 55°C.
Heat pump is not equipped with shut off valves; these must be installed outside the heat pump to facilitate any future servicing.
Heat pump can be connected to the radiator system, floor heating system and/or fan coil units.
Install the safety valve and manometer.
Indoor module is equipped with circulation pump, water‐flow‐switch, 3‐way‐water‐vave, electrical heater backup.
Note: this heat pump is split type with refrigeration link between outdoor unit and indoor module, it is not necessary to add glycol to the installation.
Buffer tank:
The installation of buffer tank is recommended for installations.
It is intended:
‐ Increase the water volume in an installation in order to limit the short‐cycle operation of the compressor. The greater
the water volume, the lower the number of start‐ups of the compressor and the longer its useful life.
‐ Guarantee on energy reserve for the defrosting phases.
Example of heat pump installations
‐ Heat pump split compact ‐ DHW production by independent tank ‐ Buffer tank for house heating
Connection of extra circulation pump
When connecting additional circulation pump, to achieve a higher flow capacity, see alternative "Underfloor heating systems" on page 25. Respective maximum flows must not be exceeded.
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Connecting the hot water tank
The water tank must be supplied with necessary set of valves.
* There must be a mixing valve if the temperature exceeds 60 °C.
* The safety valve must have a maximum 10.0 bar opening pressure and be installed on the incoming domestic water line according to outline diagram. The entire length of the overflow water pipe from the safety valves must be inclined to prevent water pockets and must also be frost proof.
* See section Dockings on page 23 for outline diagram.
5.7.2 Filling and venting the heating medium system
1. Check the water system for leakage.
2. Connect the filling pump and return line on the heating system's service connections as shown in figure.
3. Close the valve between the service connections.
4. Open the valves on the service connections (AV1, AV2).
5. Pushing the white manual lever down to bottom. (This has already been done when the machine leaves factory), then three way valve's water tank port is closed (the "B" port), room heat port is open (the "A" port).
6. Start the filling pump, and fill until there is fluid in the return pipe.
7. Open up Power ON from control panel to start machine, then heat medium water pump is running, the valve will return to the up position when power is restored.
8. Firmly pushing the white manual lever down to midway and in.
in this position both the 'A' and 'B' ports are open.
9. The filling pump and the heating medium pump are now operational. The fluid should circulate via the container with tap water until it emerges from the return hose without being mixed with air.
10. Stop machine, heat medium water pump stop running. Depressing the white manual lever lightly and then pulling the lever out, pushing the while manual lever down to bottom position, and then "A" port open, "B" port is closed.
11. Stop the filling pump and clean the particle filter.
12. Start the filling pump; open the valve between the service connections.
13. Close the valve on the service connection's return line. Now pressurize the system (to max 3 bars) with the filling pump.
14. Close the valve (AV2) on the service connection.
15. Stop the filling pump.
16. Select the auto operating mode using the operating mode button.
Push the white gear onto the position of middle, and then use your thumb to press it inside, this time both port A and port B are in open state.
Please use screwdriver to unclench the white gear of the three way valve.
Then the white fear will move back to
the original position. The three way valve will turn to port B automatically.
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A mesh filter must be installed in front of the water inlet of the unit and water tank, for keeping the water quality and collecting impurity contained in the water. Take care to keep the water filter mesh towards the bottom. Check valve is recommended to be installed at both sides of the filter, so as to clean or change the filter in an easier way.
5.7.3 Drainage
1) drain of heating system
Close the shut‐off valves in heating medium system. Open
the drain valve. A small amount of water runs out.
2) drain chassis of heat pump
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5.74 Circulation pump capacity diagram on heating medium side
Adjustment, charge flow
Adjusting the temperature difference (ΔT) between the flow temperature and the return temperature during hot water charging or at high load.
This is easily done by using the temperatures measured in Channel T2 (flow temperature) less Channel T3 (return temperature), this temperature difference (ΔT) is adjusted using circulation pump. Adjustment is performed with stable operation about 5 minutes after start, or about 5 minutes after defrosting with a cold outdoor temperature.
The temperature difference must be less than 5’c.
10kW, 12kW 15kW, 18kW
Adjust water flow
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6 switch board
When install or maintain heat pump, compressor, hot water pump and outdoor fan motor can be start forcibly by switch board.
A0 1: control compressor
AA M: control hot water pump
BA M: control outdoor fan motor
After testing, switch board will set OFF.
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6 Control panel
6.1 description of control panel
To be able to select the desired menu and increase or reduce preset values, you will use the five buttons.
•
Up button with a plus
•
Down button with a minus
•
right button
•
left button
•
Power ON/OFF button
8.2 Symbols
Heat pump is running.
Electrical heater is activated.
The figure indicates capacity step.
Warm water mode is activated.
Empty symbol, indicates warm Water temperature sensor is less than setting temperature.
Full symbol, indicates warm water temperature reach to setting temperature.
House heat/cool mode is activated.
8.3 General information
8.3.1 Menu Navigation
Press to next menu or select parameter. Press to previous menu. Press parameters of a menu.
and to navigate
A cursor (arrow) on the left‐hand side of the display indicates which menu can be opened. Press also to increase or reduce parameter value.
8.3.2 Display of current operating mode
and
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During normal operation, the screen will display following information:
z Current room temperature : 18°c z Heat pump operation mode: OFF (heat pump stop)
Press to start/stop heat pump.
If heat pump set OPERATION OFF mode for long time during winter, please remember to remove out all the water the heating system to
avoid any damage caused by freezing.
z Which day of the week, clock z Current activated operation mode
8.4 Menus
84.1 main‐menu INFORMATION
Press or to main‐menu INFORMATION.
Press and to navigate sub‐menu.
Press enter to sub‐menu.
84.2 Sub‐Menu OPERATION
This menu is used to select operation modes:
•
ROOMCOOL :
•
ROOMHEAT1 : ( heat curve )
FEED setting water temperature will change according to outside air temperature. The screen will display
“OPER. ROOMHEAT1 “. HEATCURVE can change by CURVE value, ROOM value, part HEATCURVE. Heat pump
(compressor, electrical heater) run/stop according to Calculation Integral.
•
ROOMHEAT2:
FEED setting water temperature is fixed. The screen will display “OPER. ROOMHEAT2 “. Heat pump run/stop according to setting FEED.
•
WARMWATER :
Warm water mode activate or inactivate. The screen will display “OPER. WARMWATER “.
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•
Select HEAT PUMP ON/OFF: heat pump activate or inactivate.
•
Select ADD. HEAT ON/OFF: The electrical heater activate or inactivate.
If you want to change operation mode: a. Press to main menu INFORMATION. Press and to navigate to sub‐menu OPERATION. b. Press to enter sub‐menu OPERATION. Press and to navigate to desired mode. c. Press to select or cancel. The symbol display or disappear. d. Press to exit setting. And press to the top OPERATION, and press
to back to main menu.
8.4.3 Sub‐Menu HEAT CURVE
This menu is used to set parameter of heat curve for operation mode ROOMHEAT1.
Operation mode ROOMHEAT1 should be activated.
Menu Text Description Adjustable by
CURVE
MIN
MAX
FEED setting water temperature when the outside air temperature is 0°C User
Min FEED temperature allowed. User
Max FEED temperature allowed. User
CURVE 5
CURVE 0
Part HEATCURVE 5 when outside air temperature is +5°C.
Part HEATCURVE 0 when outside air temperature is 0°C.
CURVE – 5 Part HEATCURVE ‐5 when outside air temperature is ‐5°C.
HIGH T°STOP Heat pump stops when outside air temperature ≥ value on right.
LOW T°STOP Heat pump stops when outside air temperature ≤ value on right.
User
User
User
User, if require
User, if require
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8.4.3 Sub‐Menu TEMPERATURE
This menu shows temperatures of sensor.
Menu Text
OUT
ROOM
Outside air temperature
Description
Room temperature. And set ROOM value in HEATROOM1.
FEED supply line temperature of heating system;
In brackets is set point value in HEATROOM2.
In brackets is setting FEED value according to OUT in HEATROOM1
RETURN Return temperature of heating system.
WARMWT Warm water temperature in water tank;
In brackets is the setting temperature for warm water.
All temperatures change from last 60 minutes is stored in PCB and some temperatures can be viewed in curve.
Press following temperature 3 second to see history curve.
* FEED
* RETURN
* WARMWT
Adjustable by
‐‐‐‐‐‐‐
Installation contractor. To be adapted to each individual unit
Installation contractor. To be adapted to each individual unit
Not adjustable.
Installation contractor. To be adapted to each individual unit
8.4.5 Sub‐Menu INTEGRAL
Electrical heater has three steps (2.5kW + 2.5kW + 2.5kW).
Menu Text Description
OFF
CMP.A
When calculation integral ≥ OFF (setting value), heat pump stop.
When calculation integral < CMP.A (start value), compressor start.
And calculation integral ≥ OFF (stop valve), compressor stop.
ADD1
ADD2
When calculation integral < ADD1 (start value), electrical heater 1 start.
And calculation integral ≥ CMP.A (stop value), electrical heater 1 stop.
When calculation integral < ADD2 (start value), electrical heater 2 start.
And calculation integral ≥ ADD1 (stop value), electrical heater 2 stop.
ADD3 When calculation integral < ADD3 (start value), electrical heater 3 start.
And calculation integral ≥ ADD2 (stop value), electrical heater 3 stop.
Adjustable by
USER
USER
USER
USER
USER
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The relation between those parameter is: OFF > CMP.A > ADD1 > ADD2 > ADD3 a. on sub‐menu INTEGRAL.
Press and to navigate to OFF. b. Press to enter OFF setting. Press to change setting value, each press is 10.
and
8.4.5.1 Calculation Integral (CI)
CI = (current FEED – setting FEED) * 1 minute
CI
...
‐11 ~ ‐20
Corresponding valve
...
‐20
‐1 ~ ‐10
1 ~ 10
11 ~ 20
‐10
10
20
... ...
1) FEED is less than setting FEED
For example, outside air temperature = ‐8 °C, setting FEED = 48°C. PCB will calculate CI every 1 minute.
Compressor start 1 minute later, setting FEED = 48°C, return = 30°C, FEED = 31°C; so CI = (31‐48)*1 = ‐17 = ‐20.
Compressor start 2 minute later, setting FEED = 48°C, return = 30°C, FEED = 33°C; so CI = (33‐48)*1 + (‐20) = ‐40.
Compressor start 3 minute later, setting FEED = 48°C, return = 30°C, FEED = 35°C; so CI = (35‐48)*1 + (‐40) = ‐60.
......
Compressor start 25 minute later, setting FEED = 48°C, return = 30°C, FEED = 35°C; so CI = (35‐48)*1 + (‐480) = ‐500.
Compressor start 26 minute later, setting FEED = 48°C, return = 30°C, FEED = 35°C; so CI = (35‐48)*1 + (‐500) = ‐520.
Æ ADD1 switch ON
Compressor start 26 minute later, setting FEED = 48°C, return = 30°C, FEED = 36°C; so CI = (36‐48)*1 + (‐500) = ‐520.
Compressor start 27 minute later, setting FEED = 48°C, return = 30°C, FEED = 36°C; so CI = (36‐48)*1 + (‐520) = ‐540.
Compressor start 28 minute later, setting FEED = 48°C, return = 30°C, FEED = 36°C; so CI = (36‐48)*1 + (‐540) = ‐560.
Æ ADD2 switch ON
- 30 -
Compressor start 29 minute later, setting FEED = 48°C, return = 30°C, FEED = 37°C; so CI = (37‐48)*1 + (‐560) = ‐580.
Compressor start 30 minute later, setting FEED = 48°C, return = 30°C, FEED = 37°C; so CI = (37‐48)*1 + (‐520) = ‐600.
Compressor start 31 minute later, setting FEED = 48°C, return = 30°C, FEED = 37°C; so CI = (37‐48)*1 + (‐540) = ‐620.
Æ ADD3 switch ON
2) FEED is more than setting FEED
For example, outside air temperature = ‐8 °C, setting FEED = 48°C. PCB will calculate CI every 1 minute.
0 minute, previous CI = ‐570, FEED = 55°C.
1 minute later, setting FEED = 48°C, FEED = 55°C; so CI = (55‐48)*1 + (‐570) = ‐560
2 minute later, setting FEED = 48°C, FEED = 55°C; so CI = (55‐48)*1 + (‐560) = ‐550
Æ ADD3 switch OFF
...
7 minute later, setting FEED = 48°C, FEED = 54°C; so CI = (54‐48)*1 + (‐510) = ‐500
Æ ADD2 switch OFF
...
51 minute later, setting FEED = 48°C, FEED = 53°C; so CI = (53‐48)*1 + (‐70) = ‐60
Æ ADD1 switch OFF
...
57 minute later, setting FEED = 48°C, FEED = 52°C; so CI = (52‐48)*1 + (‐10) = 0
Æ Compressor stop
8.4.5.2 INTEGRAL
The heat demand in the house depends on the season and weather conditions and is not constant. The heat demand can be expressed as temperature difference over time and can be calculated giving an integral value as a result (heat demand). To calculate the integral value, the control system uses several parameters.
A heat deficit is needed to start the heat pump, and there are four integral values, COM.A (default value = ‐60), which starts the compressor and ADD1 (electrical heater 1, factory set = ‐500), ADD2 (electrical heater 2, factory set = ‐550), ADD3 (electrical heater 3, factory set = ‐600) which starts the auxiliary electrical heater. During heat production, the deficit reduces and when the heat pump stops, the inertia in the system causes a surplus of heat.
The integral value is a measurement of the area under the time axis and is expressed in degree minutes. The figure below shows the factory settings for the integral values that the heat pump has.
When the integral value reduces to set value for INTEGRAL COMP.A, the compressor starts. If the integral value continues to reduce to ADD1, ADD2, and ADD3 for electrical heater 1, 2, 3 switch ON.
Symbol explanation :
1 Heat surplus, heat pump stop
2 Heat deficit, heat pump stop
3 compressor running area
4 electrical heater 1 running area
8 electrical heater 1 start
9 electrical heater 2 start
10 electrical heater 3 start
11 electrical heater 3 stop
5 electrical heater 2 running area 12 electrical heater 2 stop
6 electrical heater 3 running area 13 electrical heater 1 stop
7 compressor start
14 compressor stop
- 31 -
8.4.5 Sub‐Menu OPERATION TIME
Menu Text Description
HEAT PUMP Total operating hours of heat pump since installation.
Operating time will not reset to zero.
ADD 1
ADD 2
Total operating hours of electrical heater (3kW) since installation.
Operating time will not reset to zero.
Total operating hours of electrical heater (6kW) since installation.
Operating time will not reset to zero.
ADD 3 Total operating hours of electrical heater (9kW) since installation.
Operating time will not reset to zero.
8.4.6 Sub‐Menu RESET
Reset to factory setting value.
. On main‐menu INFORMATION.
Adjustable by:
USER
USER
USER
USER
Press and navigate to sub‐menu RESET. b. Press 3 second, the screen will display "RESET...”. c. A few seconds later, screen return to main menu, all parameter reset to factory setting value.
8.4.8 Sub‐Menu MAN TEST
a. On main menu INFORMATION.
Press and navigate to sub‐menu MAN TEST. b. Press 3 second to sub‐menu MAN TEST.
c. You can select ON/OFF to test each part.
- 32 -
8.4.5 Sub‐Menu DEFROST
Defrost has two mode :
* Intelligent defrost: start temp and exit temp set by PCB.
* Manual defrosts: all defrost parameter set by customer.
DEF. TIME: range of setting defrost time: (2 ~~ 20 min). Default is 15 min.
INTERVAL: range of setting defrost interval: (25 ~~ 70 min). Default is 30 min.
START TEMP: range of start defrost temperature: (‐8 ~~ ‐15°C). Default is ‐4°C.
SINCE TIME: Show last value of defrost time. Not adjustable.
BETW.DEFR: Show last value of defrost interval. Not adjustable.
8.4.5.1 Intelligent defrost:
1st defrost start condition (the first defrost period is 40 minutes):
Heat pump first to run, when compressor run continuously for 40 minutes, PCB check if evaporator temperature < ‐4°C, then start defrosting.
During defrost
Electrical heater switch ON, circulation pump run.
Defrost exit condition:
When evaporator temperature reach to 12°C, or max defrost running time = 15 minutes, Defrost exist.
Next defrost start condition:
The next defrost period will be changed according to last defrosting status, the calculation as following:
Defrost running time (minutes) 1~2 3~4 5~6 7~8 9~10 11~12 13~15
Defrost INTERVAL (minutes)
6.14.2 Manual defrost:
Defrost start condition:
60 55 50 45 40 35 30
When compressor runs continuously for 30 minutes, PCB checks if evaporator temperature < ‐4°C, then start defrost.
Defrost exit condition:
When evaporator temperature reach to 12°C, or max defrost running time = 15 minutes, Defrost exist.
- 33 -
8.4.5 Setting for operation mode WARMWATER
The setting range of water tank temperature is 20°C ~70°C.
a. On sub‐menu OPERATION, select WARMWATER mode. b. On sub‐menu TEMPERATURE, press and to navigate to WARMWT. c. Press to enter water tank temperature setting, water tank temperature.
flesh. Press and to increase, reduce setting d. Press
to exit water tank temperature setting.
8.4.5 Setting for operation mode ROOMHEAT2
The setting FEED temperature is fixed. The max setting FEED temperature is 45°C.
a. On sub‐menu OPERATION, select ROOMHEAT2 mode. b. On sub‐menu TEMPERATURE, press and to navigate to FEED. c. Press to enter FEED setting, flesh. Press and to increase, reduce setting FEED temperature. d. Press to exit FEED setting.
8.4.5 Heat curve for operation mode ROOMHEAT1
The heat curve calculates the supply temperature depending on the outdoor temperature. The lower the outdoor temperature, the higher the supply temperature. In other words, the supply temperature of the water fed to the heating system will increase linearly as the outdoor air temperature falls.
The heat curve will be adjusted in connection with installation. It must be adapted later on, however, to obtain a pleasant indoor temperature in any weather conditions. A correctly set heat curve reduces maintenance and saves energy.
Select ROOMHEAT1 mode, the setting FEED water temperature will change according to outside air temperature.
Heat curve is changed by CURVE value, ROOM value and part HEATCURVE :
- 34 -
8.4.6 Adjustment of CURVE value
If you change heat curve by CURVE value, the gradient will change. CURVE value is setting FEED water temperature at outside air temperature = 0°C.
And the setting return water temperature at outside air temperature ‐8°C change at the same time.
a. On sub‐menu HEATCURVE, press and to navigate to CURVE. b. Press to CURVE value setting. Press and to increase, reduce CURVE value. c. Press return to sub‐menu HEATCURVE.
8.4.6 Adjustment of ROOM value
If you change heat curve by ROOM value, the gradient does not change. The whole curve move upwards or downwards based on ROOM value.
Factory setting of ROOM value is 0°C.
The range ROOM valve is ‐9°C ~ 9°C.
- 35 -
a. On sub‐menu TEMPERATURE, press and to navigate to ROOM. b. Press to enter ROOM value setting, press or to increase or reduce ROOM value. c. Press to exit to sub‐menu TEMPERATURE. Press to exit to main‐menu INFORMATION. d. press and to navigate to HEATCURVE, press to enter sub‐menu HEATCURVE.
e. press and to navigate to CURVE, press
to enter CURVE valve setting.
If ROOM value reduce ‐5, the gradient does not change. The whole curve move downwards ‐5°C.
If ROOM value reduce 5, the gradient does not change. The whole curve move upwards ‐5°C.
8.4.6 Adjustment of Par t Heat Curve:
You can change partly HEATCURVE at outside air temperatures ‐5°C, 0°C and +5°C.
The gradient does not change. Only part of HEATCURVE change.
There are three setting on menu: part HEATCURVE 5, part HEATCURVE0, part HEATCURVE ‐5.
The setting range of part HEATCURVE is ‐3°C ~ 3°C. Factory setting value is 0°C.
The right picture is CURVE valve 40°C at outside air temperature 0°C
a. Press to exit to sub‐menu HEATCURVE.
- 36 -
b. Press and to navigate to CURVE 5. press to enter part HEATCURVE 5 c. Press or to increase or reduce part HEATCURVE 5 value. d. Press exit to sub‐menu HEATCURVE.
8.4.7 sub‐menu SETTING:
8.4.8 sub‐menu STERILIZE:
- 37 -
8.4.9 Alarm:
If any error on heat pump, the screen will display an alarm message.
Table: Alarm Messages
Message Signification
LOW PRESS ERROR Low pressure switch. Compressor stop.
HIGH PRESS ERROR High pressure switch. Compressor stop.
MOTOR P ERROR
ADD ERROR
OUT SENSOR
The relay of compressor or outdoor fan motor is overloaded. Compressor stop.
Over‐heating protection.
Fault in outside air temperature sensor.
The value 0°C will be used for calculation of supply line set point value for HEATCURVE.
FEEDLINE SENSOR
RETURN SENSOR
WARM WATER
ROOM SENSOR
Fault in supply line sensor. All operation stops, except hot water pump.
Return line sensor fault.
Error warm water sensor. No warm water production.
Room temperature fault. The value 20°C will be used for ROOM value on HEATCURVE.
POWER SUPPLY
HIGH RETURN
Alarm that indicates that there is an incorrect phase sequence to the compressor.
Alarm that indicates that high return temperature prevents the compressor’s operation.
CMPAIR OVER
1) Message: LOW PRESS ERROR
Cause Troubleshooting
Lack of refrigerant.
Compressor exhaust temperature is more than 105°C. Compressor over‐heat protection.
Using manometer apparatus and thermometer, check that the unit’s overheating is correct for the specific refrigerant. remedy
Follow the correct procedure (depending on type of
refrigerant) to add the correct amount of refrigerant.
If there appears to be a leak in the refrigerant circuit,
Electronic expansion valve defective or incorrectly set.
Cable break or loose cable on low pressure switch
* Using manometer apparatus and
Thermometer check what the over heating reading of the unit is.
* Also check that bulb and capillary tube are
undamaged and that the bulb is correctly installed.
* Check that both cables are connected to
the pressure switch.
* Using the buzzer, check that there are no cable breaks. In order to do this, disconnect the cables from the pressure switch and carry out leak tracing and any necessary corrective action.
If the overheating reading does not correspond with the instructions for the specific refrigerant, adjust the expansion valve until the correct value is obtained.
See separate instructions for cooling techniques.
If overheating cannot be adjusted with the expansion valve or if the capillary tube/bulb is damaged, replace it.
If a cable has come loose, reconnect it.
If there is a cable break, replace the cable.
- 38 -
circuit board.
2) Message:
HIGH PRESS ERROR
Low pressure switch cut out. Compressor is stopped. No warm water is produced.
Cause
Closed or partially closed thermostats/ valves in the heating system.
The circulation pump that is defective or has jammed.
Troubleshooting
Check that the thermostats/valves in the heating system is open.
Is there voltage to the circulation pump? remedy
Open closed thermostats/valves.
Cable break or loose cable to high pressure switch
* Check that both cables are connected to the pressure switch.
* Using the buzzer, check that there are no cable breaks. In order to do this, disconnect the cables from the pressure switch and circuit board.
Use SWITCH BOARD to check that the circulation
pump is active.
Check if there is voltage to the circulation pump, if there is, and it does not run, the circulation pump is jammed. If this is the case, open the bleed screw and
try to release the paddle wheel using a screwdriver for example.
If there is no voltage to the circulation pump, check if there is voltage from the main board, see wiring diagram. If there is voltage from the main board, check the components between the main board and the circulation pump.
If a component is defective, replace it.
If a cable has come loose, reconnect it.
If there is a cable break, replace the cable.
Overfilled refrigerant circuit.
Blocked condenser on the water side.
Using manometer apparatus and thermometer, check that the unit’s overheating is correct for the specific refrigerant.
If there is no strainer in the heating system, there is a risk of dirt sticking in the condenser and blocking it. Unfortunately there is no easy way of checking if the
condenser is blocked.
You can carry out a test by allowing the compressor and circulation pumps to remain in operation and after a while,
Follow the correct procedure (depending on type of refrigerant) to add the correct amount of refrigerant.
If there appears to be a leak in the refrigerant circuit, carry out leak tracing and any necessary corrective action.
If the condenser is thought to be blocked, try flushing it. If this does not work, it must be replaced.
- 39 -
Blocked condenser on the refrigerant side. check that the pressure pipe becomes hot and that the circulation pumps work (for circ.pumps with a bleed screw, unscrew it and feel if the pump rotor rotates using a screwdriver).
Then read the temperature on both connection pipes to the condenser:
If the temperature difference is <5°C, the condenser is not blocked.
If the temperature difference is >13°C, the condenser is probably blocked.
Using manometer apparatus and thermometer, check that the unit’s overheating is correct for the specific refrigerant.
3) Alarm sensor ( all )
Cause
Sensor fault
Troubleshooting
* When reading the resistance of the alternatively cable fault. sensors, the sensor leads must first be disconnected from the control equipment or terminal block.
* First take a reading from the sensor including cable and check against the temperature sensor resistance table.
* If the read off value does not correspond with the table, only measure the sensor
Cause and check the table.
4) Message: POWER SUPPLY
Troubleshooting
The incoming phases have the incorrect sequence (only applies to
3‐phase heat pumps).
* If the text POWER SUPPLY. appears in the display when the heat pump is powered,
(only appears in the first 10 minutes) this means that the phases have the incorrect sequence.
* When the compressor is running, check
the pressure pipe temperature by feeling
the pressure pipe. If the phases are correctly sequenced it should be hot (not just warm) even a distance from the compressor.
* When the compressor runs with the phases incorrectly sequenced a strange noise may be heard (loud, rattling) when the compressor runs backwards.
If the condenser is thought to be blocked by oil for example, try blowing nitrogen through it to release the oil. If this does not work, it must be replaced remedy
If the sensor gives a correct value, the cable is defective.
If the sensor does not give a correct value, the sensor is defective. remedy
If the phases are in the incorrect order, switch two incoming phases at the main terminal block and recheck according to the troubleshooting window.
- 40 -
5) Message:
ADD ERROR
Cause
Water flow switch fault.
No or insufficient water circulation in the heating system.
Troubleshooting
Check what the water‐flow‐switch shows. Is it a plausible/actual value?
Measure the resistance of the sensor, check against the ohm table in Measurement points.
Check:
* That the circulation pump spins
* That the shut‐off valves are open.
* That the strainer is not blocked.
* That there is no air in the heating system. remedy
If the water‐flow‐switch is defective, replace it.
The circulation pump may have jammed. If so, open the bleed screw and try to release the paddle wheel using a screwdriver for example.
Open closed valves or taps.
Check, and, if necessary, clean the strainer.
If necessary, bleed the heating system according to the installation instructions
Check insufficient water‐flow or block on heating system.
Check this sensor.
A over‐heat sensor 100°C on electrical heater holder switch
* Water temperature inside electrical heater holder is more than 100°C.
* this sensor fault
OFF
5) Message: CMPAIR OVER
Cause
Compressor
Troubleshooting
Check what the sensor shows. Is it a exhaust sensor fault plausible/actual value?
Measure the resistance of the sensor, check against the ohm table in Measurement points.
Using manometer apparatus and Lack of refrigerant, not enough refrigerant in the system. thermometer, check that the unit’s overheating is correct for the specific refrigerant. remedy
If the sensor is defective, replace it.
Follow the correct procedure (depending on type of refrigerant) to add the correct amount of refrigerant.
If there appears to be a leak in the refrigerant circuit, carry out leak tracing and any necessary corrective action. If leak tracer is not available, brush soap water on the suspected leak and look for bubbles. Also check for oil as this can come out from the refrigerant circuit.
6.16 4‐way‐valve:
4‐way‐valve switch ON on heating mode, switch OFF on cooling mode, defrosting.
6.17 3‐way‐water‐valve:
3‐way‐water‐valve switches ON on ROOM HEATING/COOLING mode, switch OFF on WATER TANK HEATING,
cycle‐refrigerant, defrosting. When heat pump stop, 3‐way‐water‐valve switch OFF.
- 41 -
6.18 circulation pump:
In WATER TANK HEATING mode, circulation pump stop when water tank temperature reach to setting temperature.
Circulation pump start when water tank temperature drop down, compressor start.
In ROOM HEATING/COOLING mode, circulation pump run all time. And circulation pump stop when error occur.
In floor heating mode, when Outlet water over‐heat protection, circulation pump run.
- 42 -
8. Wiring diagram:
* Outdoor wiring diagram for 380V‐50Hz‐3phase
- 43 -
* Outdoor wiring diagram for 230‐50Hz‐1phase
* Outdoor wiring diagram for all model
- 44 -
9. Temperature sensor resistance table:
9.1 compressor exhaust temperature sensor resistance t °c ‐‐ kΩ 50 k
‐16
‐15
‐14
‐13
‐20
‐19
‐18
‐17
‐12
‐11
‐10
‐24
‐23
‐22
‐21
‐28
‐27
‐26
‐25 t °c
‐30
‐29
‐9
‐8
R(KΩ)
866.96
815.70
479.34
452.68
427.67
404.17
382.11
361.35
341.86
323.53
767.71
722.87
680.87
641.59
604.82
570.34
538.03
507.74
306.29
290.06
274.78
260.4
246.85
9
10
7
8
5
6
3
4
11
12
13
1
2
‐1
0
‐5
‐4
‐3
‐2 t °c
‐7
‐6
14
15
R(KΩ)
234.08
222.02
140.00
133.21
126.79
120.72
114.96
109.51
104.34
99.456
210.69
199.98
189.86
180.34
171.33
162.81
154.78
147.19
94.826
90.426
86.262
82.312
78.561
30
31
32
33
26
27
28
29
34
35
36
22
23
24
25
18
19
20
21 t °c
16
17
37
38
R(KΩ)
75.001
71.625
47.857
45.817
43.877
42.027
40.265
38.585
36.987
35.462
68.416
65.368
62.474
59.719
57.104
54.620
52.253
50.000
34.007
32.619
31.297
30.034
28.827
53
54
55
56
49
50
51
52
57
58
59
45
46
47
48
41
42
43
44 t °c
39
40
60
61
R(KΩ)
27.677
26.578
18.635
17.932
17.260
16.616
16.001
15.410
14.844
14.302
25.528
24.524
23.566
22.648
21.773
20.935
20.134
19.368
13.782
13.284
12.807
12.384
11.909
76
77
78
79
72
73
74
75
80
81
82
68
69
70
71
64
65
66
67 t °c
62
63
83
84
R(KΩ)
11.487
11.083
8.0903
7.8193
7.5586
7.3077
7.0667
6.8345
6.6109
6.3960
20.694
10.321
9.9628
9.6187
9.2882
8.9706
8.6655
8.3723
6.1890
5.9894
5.7976
5.6126
5.4346 t °c
85
86
99
100
101
102
95
96
97
98
103
104
105
91
92
93
94
87
88
89
90
106
107
R(KΩ)
5.2629
5.0974
3.8506
3.7351
3.6238
3.5162
3.4123
3.3120
3.2150
3.1214
4.9379
4.7842
4.6359
4.4931
4.3552
4.2222
4.0939
3.9700
3.0310
2.9435
2.8589
2.7772
2.6982
‐15
‐14
‐13
‐12
‐11
‐10
‐9
‐8 t °c
‐20
‐19
‐18
‐17
‐16
9.2 water/ambient/evaporator temperature sensor resistance t °c – kΩ 5 k
50
51
52
53
54
55
56
57 t °c
45
46
47
48
49
3.1943
3.0815
2.9733
2.8694
2.7697
2.6740
2.5821
2.4939
R(KΩ)
3.8354
3.6961
3.5626
3.4346
3.3120
37
38
39
40
41
42
43
44 t °c
32
33
34
35
36
5.1978
5.0000
4.8109
4.6300
4.4569
4.2912
4.1327
3.9808
R(KΩ)
6.3328
6.0846
5.8475
5.6210
5.4046
24
25
26
27
28
29
30
31 t °c
19
20
21
22
23
8.7999
8.4377
8.0925
7.7635
7.4498
7.1506
6.8652
6.5928
R(KΩ)
10.9023
10.4393
9.9987
9.5794
9.1801
11
12
13
14
15
16
17
18 t °c
6
7
8
9
10
R(KΩ)
19.6768
18.7693
17.9092
17.0937
16.3203
15.5866
14.8903
14.2293
13.6017
13.0055
12.4391
11.9008
11.3890
1
2
3
‐2
‐1
0
4
5 t °c
‐7
‐6
‐5
‐4
‐3
R(KΩ)
37.4111
35.5384
33.7705
32.1009
30.5237
29.0333
27.6246
26.2927
25.0330
23.8412
22.7133
21.6456
20.6345
2.0320
1.9651
1.9007
1.8387
1.7790
1.7216
1.6663
1.6131
R(KΩ)
2.4091
2.3276
2.2493
2.1740
2.1017 t °c
58
59
60
61
62
63 1.3319
64 1.2908
65 1.2511
66
1.2128
R(KΩ)
1.5618
1.5123
1.4647
1.4188
1.3746
- 45 t °c
108
109
122
123
124
125
118
119
120
121
114
115
116
117
110
111
112
113
R(KΩ)
2.6218
2.5479
1.9814
1.9280
1.8764
1.8263
1.7778
1.7308
1.6852
1.6411
2.4764
2.4072
2.3403
2.2755
2.2128
2.1522
2.0934
2.0365
10. Dimension
* Outdoor Unit Dimension
Model 5kW 7kW 9kW 12kW 15kW 18kW
No of fan 1 1 1 2 2 2
L
W
H
840
285
610
830
310
710
880
360
770
830
310
1200
930
390
1220
930
390
1220
* Indoor Unit Dimension
- 46 -
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Key Features
- Compact design and high performance
- Reversible operation for heating and cooling
- Electronic expansion valve
- Water-side shell-tube heat exchanger
- Outdoor temperature probe for control
- LCD controller with thermostat function
- Auxiliary electrical heater
- Optional buffer tank for defrosting
Frequently Answers and Questions
What is the operating temperature range of the EVI Split Combo?
What is the maximum operating water pressure for the EVI Split Combo?
What is the recommended installation order?
Does the EVI Split Combo require glycol?
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