Guangdong R410A Refrigerant Air Water Heat Pump User Manual

: August 28, 2024
: Guangdong

Table of Contents

Guangdong R410A Refrigerant Air Water Heat Pump
Specifications
Installation
Operation
FAQs
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Guangdong R410A Refrigerant Air Water Heat Pump

Specifications

Product Name: AIR-WATER HEAT PUMP
Refrigerant: R32

Product Information
The AIR-WATER HEAT PUMP is designed to provide heating using an environmentally friendly R32 refrigerant. The unit is suitable for outdoor installation and can be connected to various terminals such as fan coil units, floor heating, and low-temperature radiators. Additionally, it can be equipped with an auxiliary heater for enhanced heating performance.

Installation

Ensure the unit is installed outside with sufficient air ventilation around it.
2. Connect the unit to the desired terminals following the installation manual.
3. Check all items in the product packaging box before installation and report any damage immediately.
4. Use the recommended tools for installation, including a percussion drill, gradienter, copper pipe bending equipment, and others listed in the manual.

Operation

Before operating the machine, ensure it has been installed by professionals.
Refer to the operation manual for detailed instructions on using the heat pump.
In case of any issues or doubts, contact your dealer for assistance.

FAQs

Q: What should I do if I detect a refrigerant leak?
A: If you suspect a refrigerant leak, immediately turn off the unit, ventilate the area, and contact a qualified service personnel to handle the situation safely.

Q: Can the auxiliary heater be used as a standalone heating source?
A: Yes, the auxiliary heater can be used independently in case of outdoor unit failure or as a supplement to the heat pump at low temperatures.

Before operating the machine, make sure it is installed by professionals. If in doubt, please contact your dealer for advice and information.

Explanation of symbols display on the unit.

WARNING

This symbol shows that this appliance used a flammable refrigerant. If the refrigerant is leaked and exposed to an external ignition source, there is a risk of fire.

CAUTION

This symbol shows that the operation manual should be read carefully.

CAUTION

This symbol shows that a service personnel should be handling this equipment with reference to the installation manual.

CAUTION

This symbol shows that a service personnel should be handling this equipment with reference to the installation manual.

CAUTION

This symbol shows that information is available such as the operating manual or installation manual.

11bolt driver 12Wire stripper 13Vacuum pump 14Pressure gauge 15Electronic scale 16Adjustable wrench 17Protective equipment, such as gloves, glasses
2. Safety notice
In order to prevent personal injury or property damage to users and others, please be sure to follow the following instructions. The prompt or wrong operation may cause injury or damage if ignoring it.
The unit shall be installed in compliance with local laws, regulations and standards. Check the voltage and frequency. This machine is only used for grounding socket. Both indoor and outdoor unit shall be equipped with leakage protection switch and must be reliably connected to the ground.
The following security precautions need to be taken into account – Please read the following warnings before installing. – Please be sure to check the details that need attention, which includes many contents related to
security issues. – After reading the installation instructions, be sure to keep them for future reference.

Description of model name LPR-16ID/INV

Warning
Tear apart and throw away plastic packaging bags so that children will not play with them. Children playing with plastic bags face danger of death by suffocation.
Safely dispose of packing materials such as nails and other metal or wood parts that could cause injuries.
Ensure that the installation of Indoor and outdoor unit is safe and reliable.
If the machine is not installed firmly or not properly, it will cause damage. The minimum support weight required for installation is 20g/mm2, and full consideration should be given to strong winds, hurricanes or earthquakes. When installing the machine in a closed area or limited space, please consider the size and ventilation of the room to prevent suffocation due to refrigerant leakage.
That the appliance shall be disconnected from its power source during service and when replacing parts and, if that the removal of the plug is foreseen, it shall be clearly indicated that the removal of the plug has to be such that an operator can check from any of the points to which he has access that the plug remains removed. If this is not possible, due to the construction of the appliance or its installation, a disconnection with a locking system in the isolated position shall be provided.
Improper installation of equipment or accessories may result in electric shock, short-circuit, leakage, fire or other damage to the equipment. Be sure to only use accessories made by the supplier, which are specifically designed for the equipment and make sure to get installation
– 5-

done by a professional.

Caution: Risk of fire/flammable materials
Servicing shall only be performed as recommended by the equipment manufacturer. Maintenance and repair requiring the assistance of other skilled personnel shall be carried out under the supervision of the person competent in the use of flammable refrigerants.
All the activities described in this manual must be carried out by a licensed technician. Be sure to wear adequate personal protection equipment such as gloves and safety glasses while installation the unit or carrying out maintenance activities.
The appliance shall be installed in accordance with national wiring regulations. Use a specific wire and fix it on the terminal block (so that the connection can avoid the
pressure of the wire from being applied to the component. Incorrect wiring can cause fire. Make certain that all electrical work is carried out by qualified personnel according to the local
laws and regulations and this manual using a separate circuit. Insufficient capacity of the power supply circuit or improper electrical construction may lead to electric shocks or fire. Be sure to install a ground fault circuit interrupter according to local laws and regulations. Failure to install a ground fault circuit interrupter may cause electric shocks and fire. During installation or repair of the unit, please do not unplug or plug in the power supply, and do not leave the unit unattended (It may cause fire or electric shock) Do not touch or operate the unit when your hands are wet.(It may cause fire or electric shock) Before touching electric terminal parts, turn off power switch. When service panels are removed, live parts can be easily touched by accident. Do not touch water pipes during and immediately after operation as the pipes may be hot and could burn your hands. To avoid injury, give the piping time to return to normal temperature or be sure to wear protective gloves. Before touching electrical parts, turn off all applicable power to the unit. After completing the installation work, check to make sure that there is no refrigerant leakage. Never directly touch any leaking refrigerant and the refrigerant pipes.
– 6-

It could cause severe frostbite. During and immediately after operation as the refrigerant pipes may be hot or cold, depending on the condition of the refrigerant flowing through the refrigerant piping, compressor and other refrigerant cycle parts. Burns or frostbite are possible if you touch the refrigerant pipes. To avoid injury, give the pipes time to return to normal temperature or, if you must touch them, be sure to wear protective gloves.
Do not touch the internal parts (pump, backup heater, etc.) during and immediately after operation.
Touching the internal parts can cause burns. To avoid injury, give the internal parts time to return to normal temperature or, if you must touch them, be sure to wear protective gloves.
Do not pierce or burn. Do not place heaters or other electrical appliances near the power cord (It may cause fire or
electric shock) Please note that water cannot be poured directly from the unit. Do not let water enter
electrical components. (It may cause fire or electric shock)
If the unit is not used for a long time, it is recommended not to turn off the power supply. If the power is turned off, the protection devices of some products (such as water pump anti-lock and anti-freezing device) will not be available.
Cautions
Please carry out drainage system and the pipeline work according to the instructions. If the drainage system or pipeline is defective, water leakage may occur, and it should be dealt
with immediately to avoid getting other household products wet and damaged. Install the power wire at least 3 feet (1 meter) away from televisions or radios to prevent interference or noise. (Depending on the radio waves, a distance of 3 feet (1 meter) may not be sufficient to eliminate the noise.) Please do not clean the unit when the power is on. When cleaning the unit, please turn off the power after shutting down. Otherwise, you may be injured by a high-speed fan or electric shock. Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer. Do not wash the unit before switching off the external isolator. This may cause electric shocks or fire. Do not modify safety or control devices without consultation with the manufacturer. Do not install the unit in the following places:
– Where there is mist of mineral oil, oil spray or vapors. Plastic parts may deteriorate, and cause them to come loose or water to leak.
– Where corrosive gases (such as sulfurous acid gas) are produced. Where corrosion of copper pipes or soldered parts may cause refrigerant to leak.
– Where there is machinery which emits electromagnetic waves. Electromagnetic waves can disturb the control system and cause equipment malfunction.
– 7-

– Where flammable gases may leak, where carbon fiber or ignitable dust is suspended in the air or where volatile flammables such as paint thinner or gasoline are handled. These types of gases might cause a fire.
– Where the air contains high levels of salt such as near the ocean.
– Where voltage fluctuates a lot, such as in factories.
– In vehicles or vessels.
– Where acidic or alkaline vapors are present.

This marking indicates that this product should not be disposed with other household wastes throughout the EU. To prevent possible harm to the environment or human health from uncontrolled waste disposal, recycle it responsibly to promote the sustainable reuse of material resources. To return your used device, please use the return and collection systems or contact the retailer where the product was purchased. They can take this product for environmental safe recycling.
DISPOSAL: Do not dispose this product as unsorted municipal waste.
Collection of such waste separately for special treatment is necessary. Do not dispose of electrical appliances as municipal waste, use separate collection facilities. Contact your local government for information regarding the collection systems available. If electrical appliances are disposed of in landfills or dumps, hazardous substance can leak into the groundwater and get into the food chain, damaging your health and well-being.
Confirm the safety of the installation area (walls, floors, etc.) without hidden dangers such as water, electricity, and gas before wiring/pipes.
Before installation, check whether the user’s power supply meets the electrical installation requirements of unit (including reliable grounding, leakage, and wire diameter electrical load, etc.). If the electrical installation requirements of the product are not met, the installation of the product is prohibited until the product is rectified.
Product installation should be fixed firmly, Take reinforcement measures, when necessary. When the unit has problems or peculiar smell, please do not continue to operate the unit.
Turn off the power immediately and stop the machine. Otherwise, electric shock or fire may be caused.
Please be careful when the product is not packaged or installed. Sharp edges can cut people. Take special care of the edges and fins of the heat exchanger.
After installation or maintenance, please check whether the refrigerant or refrigerant will leak. If the refrigerant is insufficient, the unit will not work normally.
The installation of external and internal machines must be flat and firm. Avoid vibration and water leakage.
Do not put your fingers into the fan and evaporator, do not introduce pointed objects through the grill into the fan.
– 8-

High speed fans can cause serious injury or break down of the machine. In order to avoid the danger of inadvertently resetting the thermal breaker, the equipment
cannot use external switching devices, such as timers, or be connected to a circuit that is often open or closed. This device is not designed for people with weak physical or mental behavior ability (including children), as well as people who have no use experience and do not understand the heating system. Unless it is used under the safety guidance and supervision of the person in charge, or has received training on the use of this equipment. Children should use the equipment under the supervision of adults to ensure their safe use of the equipment. If the power cord is damaged, it must be replaced by the manufacturer or its service agent or the same professional person to avoid danger. The cut-off device shall be incorporated into the fixed wiring, and the contact spacing gap of each effective conductor shall be at least 3mm.
Special requirements for R32
Do NOT have refrigerant leakage and open flame. Be aware that the R32 refrigerant does NOT contain an odour. The appliance shall be stored so as to prevent mechanical damage and in a well-ventilated
room without continuously operating ignition sources (example: open flames, an operating gas appliance) and the room size corresponds to the room area as specified for operation. Do NOT re-use joints which have been used already. Joints made in installation between parts of refrigerant system shall be accessible for maintenance purposes. Make sure installation, servicing, maintenance and repair comply with instructions and with applicable legislation (for example national gas regulation) and are executed only by authorized persons. Pipework should be protected from physical damage. Installation of pipework shall be kept to a minimum. To avoid Explosion or Burning, if need to weld the copper pipe for maintenance, must discharge all the R32 refrigerant and vacuum the heat pump from both high pressure valve and low pressure valve at the back of the heat pump.
– 9-

Normal refrigerant discharge cannot discharge all the R32 out from the system.
About Fluoridated Gases
– This air-conditioning unit contains fluoridated gases. For specific information on the type of gas and the amount, please refer to the relevant label on the unit itself. Compliance with national gas regulations shall be observed.
– Installation, service, maintenance and repair of this unit must be performed by a certified technician.
– Product installation and recycling must be performed by a certified technician. – If the system has a leak-detection system installed, it must be checked for leaks at least every 12 months. When the unit is checked for leaks, proper record-keeping of all checks is strongly recommended.
Frequency of Refrigerant Leakage Checks
– For unit that contains fluoridated greenhouse gases in quantities of 5 tons of CO2 equivalent or more, but of less than 50 tons of CO2 equivalent, at least every 12 months, or where a leakage detection system is installed, at least every 24 months.
– For unit that contains fluoridated greenhouse gases in quantities of 50 tonnes of CO2 equivalent or more, but of less than 500 tons of CO2 equivalent at least every six months, or where a leakage detection system is installed, at least every 12 months.
– For unit that contains fluoridated greenhouse gases in quantities of 500 tonnes of CO2 equivalent or more, at least every three months, or where a leakage detection system is installed, at least every six months.
– 10-

– This air-conditioning unit is a hermetically sealed equipment that contains fluoridated greenhouse gases.
Important Notice for Antifreeze to Avoid heat pump broken
1. Water flow switch MUST be installed during installation for heat pump air conditioning side to ensure proper water flow.
2. Must check if there is enough water flow after finish installation. You can check the inlet and outlet water temp difference must be about 5C when compressor is working in highest speed in heating mode.
3. Water filter MUST be installed before water go into PLATE HEAT EXCHANGER. The water filter need to be cleaned at least half an year.

4. Must use enough brine(glycol) in the water system in cold area. if the air temp is lower than -0 , for
the safety, you must use brine(glycol) as the fluid in the heat pump water system instead of pure water.
5. MUST keep the electricity power supply always connected even when you don’t use the heat pumps. Our heat pump has antifreeze function if with electricity connected. So If without enough glycol (antifreeze liquid) and if the electricity is cut off by accident for more than 30 minutes in winter, you need to
drain out all the inside water to protect the heat pump to be frozen.

Materials required for installation of heat pump Notes
1. Be sure to confirm the model name and the serial number of the unit.

Must be hard wired, plug is not allowed. Must comply with 60245 IEC57.

Wires specifications

Model

Power supply wires

Signal wires (Controller)

LPR-6ID/INV; LPR-8ID/INV

3 x 4mm²

4×0.95(diameter,±3mm

LPR-9ID/INV

LPR-12ID/INV;LPR-16ID/INV

3 x 5mm²

LPR-16IID/INV;LPR-19IID/INV

5x4mm²

Notes: The distance between power supply wires and signal wires should be kept at least 300mm.

Water pipe specifications
Model
LPR-6ID/INV; LPR-8ID/INV LPR-9ID/INV; LPR-12ID/INV LPR-16ID/INV; LPR- 16IID/INV; LPR-19IID/INV

Inlet/outlet water pipe (External thread) DN25
DN32

Water pipe 1” 1”

– 11-

Operating water pressure range Operating water pressure range 0.1 MPa to 0.3 MPa

Heating operating range Outdoor ambient temperature -25°C to 35°C

Water outlet temperature range 12°C to 65°C

Cooling operating range Outdoor ambient temperature -5°C to 43°C

Water outlet temperature range 5°C to 30°C

In cooling mode, the lowest outlet water temperature (TB out) that the unit can reach in different outdoor temperature (T4) is listed below:

In heating mode, the water flowing temperature (TB out) range in different outdoor temperature (T4) is listed below:

– 12-

In DHW mode, the water flowing temperature (TB out) range in different outdoor temperature (T4) is listed below:
– 13-

Water system sketch Notes: 1. During the winter, it is strictly prohibited to switch off the power supply for anti-freezing function of the unit. 2. When the unit is not used for a long period, please discharge the stored water in the unit. 3. After a long period, re-use the unit. Please follow the steps to check the water pump: a. Open the air-vent of the water pump. b. Check whether the rotator of the water pump is rotated normally by screwdriver. c. If the rotation is not smooth or normal, please rotate the rotator by screwdriver till it can rotate smoothly.
– 14-

Scheme1 Heating & Cooling
– 15-

Scheme 2 Heating & Cooling & DHW
– 16-

Scheme 3 Heating & Cooling & DHW & Solar Thermal System
Note:
1. C4 water pump is used for both DHW and air conditioning water circulation. 2. Installer should check the actual water resistance and make sure to keep enough minimum water flow volume,
if necessary, more water pumps should be added. 3. Safety valve (air discharge valve) should be installed at the top of the water system for easy air discharge.
– 17-

3. Equipment Overview Outline drawing of unit: LPR-6ID/INV, LPR-8ID/INV ,LPR- 9ID/INV , LPR-12ID/INV

Outline drawing of unit: LPR-16ID/INV, LPR-16IID/INV

Capacity W D H A B

6Kw-12kw 1115 425 710 440 810

Outline drawing of unit: LPR-16ID/INV, LPR-19ID/INV

– 18-

Internal structure diagram of unit LPR-6ID/INV & LPR-8ID/INV & LPR-9ID/INV

No Part Name 1 Back grill assembly 2 Back panel 3 4-way valve 4 Plate heat exchanger 5 Water pump 6 Service valve 7 Right side panel 8 Base panel 9 Compressor 10 Electrical assembly 11 Electrical cover

Type

No

12

13

STF-0203G

14

15

15/7.0(G1 / I0=130) 16

17

18

19

DA150

20

21

22

Part Name Service panel Plastic handle Front panel Air outlet grille Plastic fan blade Fan motor Condensing assembly Fan motor bracket Top cover Auto air vent valve Water flow sensor

Type
460*170 YDK-80-6L-250HZ-230V)
G4/8″ (optional) YF-G1 (optional)

– 19-

Internal structure diagram of unit LPR-12ID/INV

No Part Name 1 Back grill assembly 2 Back panel 3 4-way valve 4 Plate heat exchanger 5 Water pump 6 Service valve 7 Right side panel 8 Base panel 9 Compressor 10 IPM heat radiating air duct 11 Electrical assembly

Type

No Part Name

12 Service panel

13 Plastic handle

STF-0203G 14 Front cover

15 Plastic grill

16 Plastic fan blade

HF-Dg4

17 Fan motor

18 Condensing assembly

19 Fan motor bracket

C-7RVN153 20 Top cover

21 Auto air vent valve

22 Water flow sensor

Type
460*125 YDK-90-6/250HZ-230V)
G4/8″ (optional) YF-G1 (optional)

– 20-

Internal structure diagram of unit LPR-16ID/INV, LPR-16IID/INV & LPR-19IID/INV

No Part Name 1 Top panel 2 Condenser 3 Devision Plate 4 IPM module 5 Main PCB 6 Electrical box 7 Expansion tank 8 Right-back panel 9 Auto air vent valve

No Part Name 10 Right panel 11 Water pump 12 Gas Liquid separator 13 Liquid accumulator 14 Electronic expansion valve 15 Four-way valve 16 High press switch 17 XXXX valve 18 Compressor
– 21-

No Part Name 19 Water flow meter 20 Plate heat exchanger 21 Base plate 22 Maintenance panel 23 Front panel 24 Fan 25 Fan motor 26 Motor holder 27 Copper Fin HE

4. Electrical wiring diagram
Electrical wiring diagram of the unit
– 22-

5. Field wiring
Warning At least one leakage switch or other disconnecting device shall be installed, and contact
spacing shall be set on all electrodes, which shall be included in the fixed wiring in accordance with relevant laws and regulations. Please turn off the power when wiring. All wiring and component installation work shall be completed by licensed electricians and comply with the laws and regulations of their country. Wiring shall be carried out in strict accordance with the circuit diagram and instructions of the unit. Use a special power supply. Do not use the power supply of other equipment. Ground wires must be installed. Do not connect the machine to the ground wire of public pipeline, lightning arrester or telephone. The incomplete ground wire will cause electric shock. Leakage protector must be installed, otherwise it is easy to cause electric shock accident.
Electrical data
(Rated input power/ rated current is for reference only, subject to the nameplate of the machine)

Model
LPR-6ID/INV LPR-8/9ID/INV LPR-12ID/INV LPR-16ID/INV LPR-16IID/INV LPR- 19IID/INV

Heat pump Unit

Input

Current

1260w

5.6 A

1810w

8.3A

2500w

11.5A

3340w

12.2A

3418W

5.5A

4060w

6.5A

External electric heater

Input

Current

3000W

13.6A

3000W

13.6A

3000W

13.6A

3000W

13.6A

3000W

13.6A

3000W

13.6A

Total Max. current
20A 22A 26A 27A 20A 22A

Wires
3 x4mm² 3 x4mm² 3 x5mm² 3 x5mm² 5 x4mm² 5 x4mm²

6. Plumbing engineering
Water volume and sizing expansion vessels
To assure proper operation of the unit, the pre-pressure of the expansion vessel might need to be adjusted. 1) Check that the total water volume in the installation, total water volume of the unit is at least
40-50L.
In most applications this minimum water volume will be satisfactory. In critical processes or in rooms with a high heat load though, extra water might be required. When circulation in each space heating loop is controlled by remotely controlled valves, it is
important that this minimum water volume is kept even if all the valves are closed.
2) Expansion vessel volume must fit the total water system volume. 3) To size the expansion for the heating and cooling circuit.
– 23-

The expansion vessel volume can follow the figure below:
Water circuit connection Water connections must be made correctly in accordance with labels on the unit, with respect to the water inlet and water outlet.
Be careful not to deform the unit’s piping by using excessive force when connecting the piping. Deforming the piping can cause the unit to malfunction. If air, moisture or dust gets in the water circuit, problems may occur. Therefore, always take into account the following when connecting the water circuit: Use clean pipes only. Hold the pipe end downwards when removing burrs. Cover the pipe end when inserting it through a wall to prevent dust and dirt entering. Use a good thread sealant for sealing the connections. The sealing must be able to withstand
the pressures and temperatures of the system. When using non-copper metallic piping, be sure to insulate two kind of materials from each
other to prevent galvanic corrosion. As copper is a soft material, use appropriate tools for connecting the water circuit.
Inappropriate tools will cause damage to the pipes. The unit is only to be used in a closed water system. Application in an open water circuit can lead to excessive corrosion of the water piping: Never use Zn-coated parts in the water circuit. Excessive corrosion of these parts may occur as
copper piping is used in the unit’s internal water circuit. When using a 3-way valve in the water circuit. Preferably choose a ball type 3-way valve to
guarantee full separation between the domestic hot water and floor heating water circuit. When using a 3-way valve or a 2-way valve in the water circuit. The recommended maximum
changeover time of the valve should be less than 60 seconds.
– 24-

Water circuit anti-freeze protection
All internal hydroponic parts are insulated to reduce heat loss. Insulation must also be added to the field piping.
The software contains special functions using the heat pump and backup heater (if it is available) to protect the entire system against freezing. When the temperature of the water flow in the system drops to a certain value, the unit will heat the water by using the heat pump. The freeze protection function will turn off only when the temperature increases to a certain value.
In event of a power failure, the above features would not protect the unit from freezing.
Note
When the unit is not running for a long time, make sure the unit is powered on all the time, if the power is cut off, the water in the system pipe needs to be drained out, and avoid the pump and pipeline system being damaged by freezing. To drain water from the system, make sure the Drain outlet of the needle valve is also drained. Also the power of the unit needs to be cut off after water in the system is drained clean. Water may enter into the flow switch and cannot be drained out and may freeze when the temperature is low enough. The flow switch should be removed and dried, then can be reinstalled in the unit.
Counterclockwise rotation, remove the flow switch. Drying the flow switch completely.
Check the water circulation
Note: The Max Water Pressure of the system pipe is 1.0MPa , otherwise it will cause rupture. A Y-type filter must be installed at the water inlet.
Before proceeding with the installation, please check the following points: The maximum water pressure is 0.3 MPa (Rated Water Pressure). To facilitate service and maintenance, please install a shut-off valve at the inlet and outlet. Pay attention to the installation position of the shut-off valve. It is recommended to install at least one drain valve in the lowest section of the water circulation system to drain the water cleanly during maintenance. The indoor unit has an automatic exhaust valve. Do not tighten the automatic exhaust valve, so as not to affect the automatic exhaust function in the water circuit. Pay attention to the parts in the piping to be able to withstand the maximum water pressure requirements of the system.
Water filling
1. Connect the water supply pipe to the inlet and outlet pipes of the system. 2. Make sure that the automatic exhaust valve has been opened (at least two turns). 3. Fill with water until the pressure shows close to 0.2 MPa.
Use the exhaust valve to exhaust the air in the waterway as much as possible in order to avoid the air going into the waterway which may cause the equipment to malfunction.
– 25-

Note

When filling water, the air in the system may not be completely exhausted. The remaining air will be automatically discharged by the automatic exhaust valve after the unit runs for one hour. Additional water may be added afterwards.
The water pressure displayed on the remote controller’s display largely depends on the water temperature (the higher the water temperature, the greater the water pressure).
The water pressure must be kept> 0.03 MPa at all times to prevent air from entering the water circulation.
The unit may drain the excess water through the safety valve. Water quality should be complied with EN 98/83 EC Directives. The rated water flow must meet the requirements shown in the table below.

LPR-6ID/INV LPR-8/9ID/INV LPR-12ID/INV LPR-16ID/INV LPR-16IID/INV LPR- 19IID/INV

1.2m³ /h 1.8m³ /h 2.5m³ /h 3.0m³ /h 3.0m³ /h 3.5m³ /h

7. The installation of the unit
Transportation and storage The unit should be transported and stored vertically.

Precautions for choosing the installation location
Warning
Please take appropriate measures such as using a fine mesh fence to prevent the unit from being used as a habitat by some small animals. Contact of small animals with electrical parts may cause the unit to malfunction, smoke or catch
– 26-

fire. Please keep the surrounding environment clean.
Choose a place that is strong enough to support the weight and vibration of the unit. Choose a place with good ventilation and noise from the operation of the unit that will not cause
trouble to neighbors or users. Avoid installing it close to the bedroom, as the noise of the unit will cause trouble. There must be enough space to facilitate installation and maintenance. There must be enough space for ventilation, and there must be no obstacles within 1 meter in
front of the air outlet of the unit. No flammable gas leaks near the installation point. Install the unit, power cords and wires, and keep at least three meters away from the TV and
other radio devices to avoid interference with picture quality and sound quality. There is an electromagnetic interference problem, the distance must be increased, and the
electrical appliances must be shielded to ensure a good grounding. At the seaside or in places with high salinity, the corrosiveness is strong, which may shorten the
service life of the unit. When the external machine is defrosted, more condensed water will be generated. Drainage
facilities should be made to avoid affecting others. When installing the unit in a place exposed to strong wind, pay special attention to the following. Strong winds of 5 m/sec or more blowing against the unit’s air outlet causes a short circuit
(suction of discharge air), and this may have the following consequences: – Deterioration of the operational capacity. – Frequent frost acceleration in heating operation. – Disruption of operation due to rise of high pressure. – When a strong wind blows continuously on the front of the unit, the fan can start rotating very
fast until it breaks. Places where rain can be avoided as much as possible. Please connect the drainage pipe and ensure the drainage is smooth The drainage pipe must be
insulated to prevent freezing.
Installation space
Installation Drawing – 27-

The unit installation When installing the unit, please refer to the installation guide, and choose the installation location to meet the size requirements of the above figure. 1. Confirm that the strength and levelness of the installation position meet the installation
requirements, and the unit will not cause vibration or noise after installation. 2. Prepare four sets of basic M8 bolts, nuts, and shock-proof rubber pads. (Optional). 3. According to the foundation drawing, fix the machine with foundation bolts. It is better to screw it
into the foundation bolt, leaving 20mm on the foundation surface.
4. You need to install a separate circuit breaker in all installations.
A Water Flow Switch must be installed to avoid plate heat exchanger broken. Our heat pump units are already with built inside water flow meter switch. You can see parameter C47 water flow volume after installation.
Refill the refrigerant If you need to charge refrigerant again, check whether the pipe leaks. Refer to the nameplate of the unit for refrigerant type and quantity required.
Warning Except for the specified refrigerant (R32), do not mix other substances into the refrigerant
circulation pipe. When refrigerant leaks, ventilate the room as soon as possible.
– 28-

R32 refrigerant and other refrigerants cannot be directly discharged into the environment.
Note
Use R32 special vacuum pump. Using the same vacuum pump for different refrigerants may damage the vacuum pump or unit.
The needle valve on the gas pipe can be used for vacuumizing and charging refrigerant. Needle valve size: 7/16 “-20UNF, tightening force: 6N.m
Tighten the needle valve to the specified torque using a torque wrench. After refrigerant is charged, tighten the screw plug with a key.
Add R32
Note Add the specified amount of refrigerant and inject it into the liquid pipe in liquid form. Because the refrigerant is a mixed refrigerant, injected into the tube in a gaseous state may change the composition of the refrigerant and make it unable to operate normally. Before injecting, please check whether the cylinder is equipped with a siphon.
8. Pre operation inspection
Inspection before initial startup Switch off the power supply before making any connections.
1. Field wiring check Check whether the specifications of the connecting wire and the connection conditions meet the requirements. Check whether the capacity of the air switch and related specifications meet the requirements.
2. Fuses or protection devices Check that the fuses or the locally installed protection devices are of the size and type specified. Make sure that neither a fuse nor a protection device has been bypassed.
3. Ground wire Connect the ground wire correctly and tighten the ground terminal.
4. Fixed Check whether the unit is well fixed to avoid abnormal noise and vibration during startup.
– 29-

5. Equipment Check whether there are any damaged components inside the unit or the pipes are squeezed or deformed or flattened.
6. Refrigerant leak Check the unit for refrigerant leakage. If there is a leakage, please contact your local dealer.
7. Voltage Check and confirm the power supply voltage, which must be consistent with the requirements on the nameplate of the unit.
8. Auto exhaust valve Make sure that the exhaust port of the exhaust valve is open (releasing at least 2 turns).
9. Pressure relief valve Check if the backup heater vessel is completely filled with water by operating the pressure relief valve. It should purge water instead of air. OPERATING THE SYSTEM WITH THE BACKUP HEATER VESSEL NOT COMPLETELY FILLED WITH WATER WILL DAMAGE THE BACKUP HEATER!
10. Waterway valve Install each valve correctly and open it.
Operating the system after closing the valve will damage the pump!
Start up and Commissioning a. After the system inspection is finished, startup can begin. b. Connect the power supply; switch on the isolator to turn on the heat pump.
c. The circulation pumps starts immediately. After 30 seconds, the fan motor starts. After another 10 seconds, compressor starts.
d. Air is initially released from the hot water and venting may be necessary. If bubbling sounds can be heard from the heat pump, the circulation pump or radiators the entire system will require further venting. When the system is stable (correct pressure and all air eliminated) the automatic heating control system can be set as required.
e. Check heating water inlet/outlet temperature difference after the system is stable. f. Check the compressor exhaust and suction temperature. g. Adjust the parameters according to different weather conditions and user requirements.
9. Display interface and operating instructions
9.1 General instruction of user interface
– 30-

ICON

Description Turn on/off Enter search or Return To last page or go up To next page or go down Setting or confirm Enter mode selection

Name ON/OFF Return/Search
Up Down Enter/Confirm Mode

– 31-

9.2 Main interface introduction The main interface will vary according to different application configuration. Here are some possible configurations: 9.2.1 (Single Zone Water temp + DHW
The system includes control of single zone water temperature and DHW. 9.2.2 (Single Zone Room temp + DHW)
The system includes control of single zone room temperature and DHW. Note: Wired controller should be installed inside the room, to detect the room temperature. 9.2.3 (Dual Zone mixed + DHW)
The system includes control of single zone room temperature (Only heating) and single zone water temperature (Cooling or heating), and DHW.
– 32-

9.2.4 (Dual Zone water temp + DHW)
The system includes control of single zone water temperature (Only heating) and another single zone water temperature (Cooling or heating), and DHW. Note: Thermostat can only control the outlet water temperature. 9.3 Operation of interface 9.3.1 Unlock the interface If appearances on the left top of the interface, means the screen is locked:
Press for 3 seconds will disappear and screen is unlocked:
– 33-

Setting to ban lock/unlock: Press and find “01 Display setting, press and find ” 03 Screen lock’.

9.4 ON/OFF Operation 9.4.1 ON/OFF the zone-controller

To press or on the main interface to select the zone, Press and press ON/OFF the cooling or heating of the zone. Below exampleTo press or on the main interface to select the zone, Press
to confirm ON:

to confirm and press

9.4.2 ON/OFF the zone- Thermostat ThermostatSingle zonethermostat can control the mode and ON/OFF ThermostatDual zonethermostat can control the ON/OFF while controller can control the
mode.

9.4.3 ON/OFF the DHW- controller Make sure DHW is selected and active.
To press or on the main interface to select DHW, Press ON/OFF the DHW.

and press

to confirm

– 34-

9.5 Adjust expected temperature To press or on the main interface to select DHW/Zone, Press

and see the range:

To press or to adjust and press to “” confirm:
9.6 Mode of Zone setting To press on the main interface and see set mode:

To press or to select and press to confirm and savePress will cancel and quit.
– 35-

9.7 Time and date setting On main interface, Press and find “02 Time and date, press to enter, Use and to adjust the time
press and use and to adjust the year.
Press to confirm and savePress will cancel and quit. 9.8 Query Menu
Press on main interface and enter query menu, Three main menus for query: Curt.err query Status query Version query
press or to select and press to enter
– 36-

9.8.1 Curt.err query
When the error comes, the query interface will be shown as below, Press to check the detail of the error, and press to reset the error situation.

Note: For more information of Error code, see Appendix 2 9.8.2 Status query

In the Status query, you can press or to check the detail operating status of each item

Press to check Output querying (item with green means its active), Press Analog querying.

to go back

9.8.3 Version query In the version query, you can check version of the system.

– 37-

9.9 Settings Menu 9.9.1 Display settings
On main interface, Press and find “01 Display setting”:, press to enter,

You can find 01~10 items in the setting menu, use or to select and use to configure.
9.9.2 Time and date settings
On main interface, Press and find “02 Time and date:, press to enter, Use and to adjust the time

Press

to confirm and savePress

will cancel and quit.
– 38-

9.9.3 Timer settings On main interface, Press and find “03 Timer”, press to enter, Use and to adjust the timers
9.9.3.1 Timed on/off Press and enter Timed on/off for Daily Schedule/Weekly Schedule/Cancel timer setting, and press and enter Daily Schedule

Press and enter to Use and to adjust the time for start and end, and the mode and temperature.

Press to confirm and savePress will cancel and quit. Note: Hotw means DHW

For example: No.
1 2 3 4 5

Start 100 700 1100 1600 2000

End 600 900 1300 1900 2200

Mode Hotw Heat Cool Cool Hotw

– 39-

Temp 50 30 20 20 50

The heat pump will operate as below:

Time 100 600 700 900 1100 1300 1600 1900 2000 2200

Operation Hotw mode start up Hotw mode end Heating mode start up Heating mode end Cooling mode start up Cooling mode end Cooling mode start up Cooling mode end Hotw mode start up Hotw mode end

When the timers active, the will be on the main interface.

Note: The time settings should be within a same day in 24 hours, otherwise the timer will be invalid.

– 40-

Weekly Schedule setting. Press and enter to Use and to select and press to active the day. Use and to next page (next week) press to enter timer setting, (Timer setting is same as daily timer mentioned above)
– 41-

Cancel timer The Cancel timer can cancel and clear all the timer’s settings,
Press to confirm and clearPress will cancel and quit. 9.9.3.2 Sterilization timer
There are two ways to use the sterilization function: 1. Regular use (Timer) 2. Manual use The timed sterilization function is used to kill the bacteria in the hot water tank. The temperature of the hot water tank will be forced to reach 61-70 degrees (the specific value is determined by the parameter sterilization temperature). The sterilization temperature can be set in the advanced settings. Before using the sterilization function, please make sure to set the “User parameter” [Timed sterilization function] parameter to use (see the parameter table in 10.5 User parameters for this parameter). If the parameter value is disabled, the sterilization function cannot be started. The following describes the timing and manual use methods respectively. The timing use is as follows: Press and enter Sterilization timer
Use and to select and use to set the start time and days
– 42-

The priority of manual control is higher than that of timing control, Use and press to change the Current state: If the current status is’ Off ‘press to manually start Sterilization, If the current status is’ On ‘press to manually stop Sterilization,

to select

9.9.3.3 Silent timer

There are two ways to use the Silent timer: 1. Regular use (Timer) 2. Manual use

There are two levels of mute mode, level 1 and level 2. The maximum speed of the fan and compressor in level 2 mode is smaller than that in level 1. Next, we will introduce how to use timed mute:
Press and enter Silent timer:

The priority of manual control is higher than that of timing control, Use and to select press to change the Current state and Silent level: If the current status is’ Off ‘press to manually start Silent mode, if the current status is’ On ‘

press to manually stop Silent mode, when the Silent mode is active, the the main interface.

icon will be on

– 43-

9.9.3.4 DHW pump timer Press and enter DHW pump timer
Use and to select press to change the setting time.
9.9.4 WIFI settings
This remote controller has built-in WIFI module, which can establish communication with mobile phone APP and operate the unit using mobile phone APP. When configuring the remote controller to the WIFI network for the first time, it is necessary to ensure that the remote controller and the mobile phone are in the same WIFI signal, and the signal cannot be too weak. On main interface, press and find “03 Timer”, press to enter, we can see the current WIFI status, MAC address and the instructions.
– 44-

If the WIFI status shows connected to the cloud server ”, the remote controller has been distributed and can be operated on the account that has been distributed before. If the WIFI status displays other contents or needs to cancel the previously completed distribution network, the following steps can be followed (note: the account with completed distribution network and successful communication will no longer be able to operate the unit) When we see WIFI status: configuring the network in smart mode, we can start to connect to App. Pls scan the code for the connection instructions.
10. Test run and final checks
The installer is obliged to verify correct operation of unit after installation. Final checks Before switching on the unit, read following recommendations:
When the complete installation and all necessary settings have been carried out, close all front panels of the unit and refit the unit cover.
The service panel of the switch box may only be opened by a licensed electrician for maintenance purposes.
That during the first running period of the unit, required power input may be higher than stated on the nameplate of the unit. This phenomenon originates from the compressor that needs elapse of a 50 hours run in period before reaching smooth operation and stable power consumption.
11.Maintenance and service
In order to ensure optimal availability of the unit, a number of checks and inspections on the unit and the field wiring have to be carried out at regular intervals.
– 45-

This maintenance needs to be carried out by your local technician.
Warning ELECTRIC SHOCK
Before carrying out any maintenance or repairing activity, must switch off the power supply on the supply panel.
Do not touch any live part for 10 minutes after the power supply is turned off. The crank heater of compressor may operate even in standby. Please note that some sections of the electric component box are hot. Forbid touch any conductive parts. Forbid rinse the unit. It may cause electric shock or fire. Forbid leave the unit unattended when service panel is removed.
The following checks must be performed at least once a year by qualified person. Water pressure Check the water pressure, if it is below 1 bar, fill water to the system. Water filter Clean the water filter. Water pressure relief valve Check for correct operation of the pressure relief valve by turning the black knob on the valve counter-clock Wise: -If you do not hear a clacking sound, contact your local dealer. -In case the water keeps running out of the unit, close both the water inlet and outlet shut-off valves first and then contact your local dealer. Pressure relief valve hose Check that the pressure relief valve hose is positioned appropriately to drain the water. Backup heater vessel insulation cover Check that the backup heater insulation cover is fastened tightly around the backup heater vessel. Domestic hot water tank pressure relief valve (field supply) Applies only to installations with a domestic hot water tank. Check for correct operation of the pressure relief valve on the domestic hot water tank. Domestic hot water tank booster heater Applies only to installations with a domestic hot water tank. It is advisable to remove lime buildup on the booster heater to extend its life span, especially in regions with hard water. To do so, drain the domestic hot water tank, remove the booster heater from the domestic hot water tank and immerse in a bucket (or similar) with lime-removing product for 24 hours. Unit switch box -Carry out a thorough visual inspection of the switch box and look for obvious defects such as loose connections or defective wiring. -Check for correct operation of contactors with an ohm meter. All contacts of these contactors must be in open position. Use of glycol (Refer to “Water circuit anti-freeze protection”) Document the glycol concentration and the pH-value in the system at least once a year. -A PH-value below 8.0 indicates that a significant portion of the inhibitor has been depleted and that more inhibitor needs to be added.
– 46-

-When the PH-value is below 7.0 then oxidation of the glycol occurred, the system should be drained and flushed thoroughly before severe damage occurs.
Make sure that the disposal of the glycol solution is done in accordance with relevant local laws and regulations.
12.Trouble shooting
This section provides useful information for diagnosing and correcting certain troubles which may occur in the unit. This troubleshooting and related corrective actions may only be carried out by your local technician. General guidelines
Before starting the troubleshooting procedure, carry out a thorough visual inspection of the unit and look for obvious defects such as loose connections or defective wiring.

Warning When carrying out an inspection on the switch box of the unit, always make sure that the main switch of the unit is switched off.
When a safety device was activated, stop the unit and find out why the safety device was activated before resetting it. Under no circumstances can safety devices be bridged or changed to a value other than the factory setting. If the cause of the problem cannot be found, call your local dealer.
If the pressure relief valve is not working correctly and is to be replaced, always reconnect the flexible hose attached to the pressure relief valve to avoid water dripping out of the unit!

For problems related to the optional solar kit for domestic water heating, refer to the troubleshooting in the Installation and owner’s manual for that kit.

General symptoms

Symptom 1: The unit is turned on but the unit is not heating or cooling as expected

POSSIBLE CAUSES

CORRECTIVE ACTION

The temperature setting is not correct. Check parameters and running mode

The water flow is too low.

Check that all shut off valves of the water circuit are in the right position.
Check if the water filter is plugged. Make sure there is no air in the water system. Check on the manometer that there is sufficient water
pressure. The water pressure must be>0.1 MPa (water is cold). Make sure that the expansion vessel is not broken. Check that the resistance in the water circuit is not too high for the pump.

The water volume in the installation is too low.

Make sure that the water volume in the installation is above the minimum required value (refer to “Water volume and sizing expansion vessels”).

– 47-

Symptom 2: The unit is turned on but the compressor is not starting (space heating or domestic water heating)

POSSIBLE CAUSES

CORRECTIVE ACTION

The unit maybe operate out of its operation range (the water temperature is too low).

In case of low water temperature, the system utilizes the backup heater to reach the minimum water temperature first (12°C). Check that the backup heater power supply is correct. Check that the backup heater thermal fuse is closed. Check that the backup heater thermal protector is not activated. Check that the backup heater contactors are not broken.

Symptom 3: Pump is making noise (cavitation)

POSSIBLE CAUSES

There is air in the system.

Purge air.

CORRECTIVE ACTION

Water pressure at pump inlet is too low.

Check on the manometer that there is sufficient water pressure. The water pressure must be > 0.1 MPa (water is cold). Check that the manometer is not broken. Check that the expansion vessel is not broken. Check that the setting of the pre- pressure of the expansion
vessel is correct (refer to “Water volume and sizing expansion vessels”).

Symptom 4: The water pressure relief valve opens POSSIBLE CAUSES

CORRECTIVE ACTION

The expansion vessel is broken. Replace the expansion vessel.

The filling water pressure in the installation is higher than 0.3MPa.

Make sure that the filling water pressure in the installation is about 0.10~0.20MPa (refer to “Water volume and sizing expansion vessels”).

Symptom 5: The water pressure relief valve leaks

POSSIBLE CAUSES

CORRECTIVE ACTION

Dirt is blocking the water pressure relief valve outlet.

Check for correct operation of the pressure relief valve by turning the red knob on the valve counter clockwise:
If you do not hear a clacking sound, contact your local dealer. In case the water keeps running out of the unit, close both the
water inlet and outlet shut-off valves first and then contact your local dealer.

13. Information servicing

Checks to the area
Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized. For repair to the refrigerating system, the following precautions shall be complied with prior to conducting work on the system.
– 48-
Work procedure
Works shall be undertaken under a controlled procedure so as to minimize the risk of a flammable gas or vapour being present while the work is being performed.
General work area
All maintenance staff and others working in the local area shall be instructed on the nature of work being carried out, work in confined spaces shall be avoided. The area around the work space shall be sectioned off. Ensure that the conditions within the area have been made safe by control of flammable material.
Checking for presence of refrigerant
The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of potentially flammable atmospheres. Ensure that the leak detection equipment being used is suitable for use with flammable refrigerants, i.e. no sparking, adequately sealed or intrinsically safe.
Presence of fire extinguisher
If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire extinguishing equipment shall be available to hand. Have a dry power or CO2 fire extinguisher adjacent to the charging area.
No ignition sources
No person carrying out work in relation to a refrigeratiaon system which involves exposing any pipe work that contains or has contained flammable refrigerant shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion. All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the site of installation, repairing, removing and disposal, during which flammable refrigerant can possibly be released to the surrounding space. Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks. NO SMOKING signs shall be displayed.
Ventilated area
Ensure that the area is in the open or that it it adequately ventilated before breaking into the system or conducting any hot work. A degree of ventilation shall continue during the period that the work is carried out. The ventilation should safely disperse any released refrigerant and preferably expel it externally into the atmosphere.
Checks to the refrigeration equipment
Where electrical components are being changed, they shall be fit for the purpose and to the correct specification. At all times the manufacturer s maintenance and service guidelines shall be followed. If in doubt consult the manufacturer s technical department for assistance. The following checks shall be applied to installations using flammable refrigerants:
The charge size is in accordance with the room size within which the refrigerant containing parts are installed;
– 49-

The ventilation machinery and outlets are operating adequately and are not obstructed; If an indirect refrigerating circuit is being used, the secondary circuits shall be checked for the
presence of refrigerant; marking to the equipment continues to be visible and legible. Marking and signs that are illegible shall be corrected; Refrigeration pipe or components are installed in a position where they are unlikely to be
exposed to any substance which may corrode refrigerant containing components, unless the components are constructed of materials which are inherently resistant to being corroded or are suitably protected against being so corroded.
9) Checks to electrical devices
Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures. If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is satisfactorily dealt with. If the fault cannot be corrected immediately but it is necessary to continue operation, and adequate temporary solution shall be used. This shall be reported to the owner of the equipment so all parties are advised.
Initial safety checks shall include: That capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking; That there no live electrical components and wiring are exposed while charging, recovering or purging the system; That there is continuity of earth bonding.
10) Repairs to sealed components
a) During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being worked upon prior to any removal of sealed covers, etc. If it is absolutely necessary to have an electrical supply to equipment during servicing, then a permanently operating form of leak detection shall be located at the most critical point to warn of a potentially hazardous situation.
b) Particular attention shall be paid to the following to ensure that by working on electrical components, the casing is not altered in such a way that the level of protection is affected. This shall include damage to cables, excessive number of connections, terminals not made to original specification, damage to seals, incorrect fitting of glands, etc.
Ensure that apparatus is mounted securely. Ensure that seals or sealing materials have not degraded such that they no longer serve the
purpose of preventing the ingress of flammable atmospheres. Replacement parts shall be in accordance with the manufacturer s specifications.
The use of silicon sealant may inhibit the effectiveness of some types of leak detection equipment. Intrinsically safe components do not have to be isolated prior to working on them.
11) Repair to intrinsically safe components
Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this
– 50-

will not exceed the permissible voltage and current permitted for the equipment in use. Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmosphere. The test apparatus shall be at the correct rating. Replace components only with parts specified by the manufacturer. Other parts may result in the ignition of refrigerant in the atmosphere from a leak.
12) Cabling
Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse environmental effects. The check shall also take into account the effects of aging or continual vibration from sources such as compressors or fans.
13) Detection of flammable refrigerants
Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks. A halite torch (or any other detector using a naked flame) shall not be used.
14) Leak detection methods
The following leak detection methods are deemed acceptable for systems containing flammable refrigerants. Electronic leak detectors shall be used to detect flammable refrigerants, bu the sensitivity may not be adequate, or may need re-calibration.(Detection equipment shall be calibrated in a refrigerant- free area.) Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant. Leak detection equipment shall be set at a percentage of the LFL of the refrigerant and shall be calibrated to the refrigerant employed and the appropriate percentage of gas (25% maximum) is confirmed. Leak detection fluids are suitable for use with most refrigerants but the use of detergents containing chlorine shall be avoided as the chlorine may react with the refrigerant and corrode the copper pipe-work. If a leak is suspected, all naked flames shall be removed or extinguished. If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, or isolated (by means of shut off valves) in a part of the system remote from the leak. Oxygen free nitrogen (OFN) shall then be purged through the system both before and during the brazing process.
15) Removal and evacuation
When breaking into the refrigerant circuit to make repairs of for any other purpose conventional procedures shall be used, However, it is important that best practice is followed since flammability is a consideration. The following procedure shall be adhered to:
Remove refrigerant; Purge the circuit with inert gas; Evacuate; Purge again with inert gas; Open the circuit by cutting or brazing.
The refrigerant charge shall be recovered into the correct recovery cylinders. The system shall be flushed with OFN to render the unit safe. This process may need to be repeated several times.
Compressed air or oxygen shall not be used for this task.
Flushing shall be achieved by breaking the vacuum in the system with OFN and continuing to fill until
– 51-

the working pressure is achieved, then venting to atmosphere, and finally pulling down to a vacuum. This process shall be repeated until no refrigerant is within the system.
When the final OFN charge is used, the system shall be vented down to atmospheric pressure to enable work to take place. This operation is absolutely vital if brazing operations on the pipe-work are to take place.
Ensure that the outlet for the vacuum pump is not closed to any ignition sources and there is ventilation available.
16) Charging procedures
In addition to conventional charging procedures, the following requirements shall be followed: Ensure that contamination of different refrigerants does not occur when using charging equipment. Hoses or lines shall be as short as possible to minimize the amount of refrigerant contained in them. Cylinders shall be kept upright. Ensure that the refrigeration system is earthed prior to charging the system with refrigerant. Label the system when charging is complete(if not already). Extreme care shall be taken not to overfill the refrigeration system. Prior to recharging the system it shall be pressure tested with OFN. The system shall be leak tested on completion of charging but prior to commissioning. A follow up leak test shall be carried out prior to leaving the site.
17) Decommissioning
Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its detail. It is recommended good practice that all refrigerants are recovered safely. Prior to the task being carried out, an oil and refrigerant sample shall be taken.
In case analysis is required prior to re-use of reclaimed refrigerant. It is essential that electrical power is available before the task is commenced.
a) Become familiar with the equipment and its operation.
b) Isolate system electrically
c) Before attempting the procedure ensure that: Mechanical handling equipment is available, if required, for handling refrigerant cylinders; All personal protective equipment is available and being used correctly; The recovery process is supervised at all times by a competent person; Recovery equipment and cylinders conform to the appropriate standards.
d) Pump down refrigerant system, if possible.
e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system.
f) Make sure that cylinder is situated on the scales before recovery takes place.
g) Start the recovery machine and operate in accordance with manufacturer s instructions.
– 52-

h) Do not overfill cylinders. (No more than 80% volume liquid charge).
i) Do not exceed the maximum working pressure of the cylinder, even temporarily.
j) When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the equipment are removed from site promptly and all isolation valves on the equipment are closed off.
k) Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked.
18) Labeling
Equipment shall be labeled stating that it has been DE-commissioned and emptied of refrigerant. The label shall be dated and signed. Ensure that there are labels on the equipment stating the equipment contains flammable refrigerant.
19) Recovery
When removing refrigerant from a system, either for service or decommissioning, it is recommended good practice that all refrigerants are removed safely.
When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed. Ensure that the correct numbers of cylinders for holding the total system charge are available. All cylinders to be used are designated for the recovered refrigerant and labeled for that refrigerant(i.e special cylinders for the recovery of refrigerant). Cylinders shall be complete with pressure relief valve and associated shut-off valves in good working order.
Empty recovery cylinders are evacuated and, if possible, cooled before recovery occurs.
The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at hand and shall be suitable for the recovery of flammable refrigerants. In addition, a set of calibrated weighing scales shall be available and in good working order.
Hoses shall be complete with leak-free disconnect couplings and in good condition. Before using the recovery machine, check that it is in satisfactory working order, has been properly maintained and that any associated electrical components are sealed to prevent ignition in the event of a refrigerant release. Consult manufacturer if in doubt.
The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder, and the relevant Waste Transfer Note arranged. Do not mix refrigerants in recovery units and especially not in cylinders.
If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to make certain that flammable refrigerant does not remain within the lubricant. The evacuation process shall be carried out prior to returning the compressor to the suppliers. Only electric heating to the compressor body shall be employed to accelerate this process. When oil is drained from a system, it shall be carried out safely.
20) Transportation, marking and storage for units
– 53-

Transport of equipment containing flammable refrigerants Compliance with the transport regulations Marking of equipment using signs Compliance with local regulations Disposal of equipment using flammable refrigerants Compliance with national regulations Storage of equipment/appliances The storage of equipment should be in accordance with the manufacturer’s instructions. Storage of packed (unsold) equipment Storage package protection should be constructed such that mechanical damage to the equipment inside the package will not cause a leak of the refrigerant charge. The maximum number of pieces of equipment permitted to be stored together will be determined by local regulations.
14. Error code list and solution

Err code MALFUNCTION OR PROTECTION 2 EEPROM data error fault 3 System ambient temperature fault 5 Total outlet water temperature fault 6 System maintenance data error 9 Insufficient water flow 10 Water tank electric overload

THE EXCLUSION METHOD
Initialize all parameters. If the fault still cannot be solved after initialization, please contact us! Check whether the sensor is connected normally; Check whether the temperature sensor is normal.
Check whether the temperature sensor is normal.
Initialize system maintenance settings. If the fault still cannot be solved after initialization, please contact us! Check whether the corresponding input point is closed.
/

12 Hot water tank temperature fault

Check whether the temperature sensor is normal.

14

System fault

total

outlet

water

temperature

Check whether the temperature sensor is normal.

15

Floor fault

heating

inlet

water

temperature

Check whether the temperature sensor is normal.

82 Solar temperature sensor failure

Check whether the temperature sensor is normal.

85 Indoor temperature sensor failure 86 Inverter water pump failure 97 0# compress low pressure fault 98 0# compress high pressure fault 101 0# Fin temperature sensor fault

Check whether the temperature sensor is normal.
Check whether the variable frequency water pump is normal. Check whether the input status of the low voltage signal of the press is normal! Check whether the input state of the high-pressure signal of the press is normal!
Check whether the temperature sensor is normal.

– 54-

Err code MALFUNCTION OR PROTECTION

THE EXCLUSION METHOD

102 0# Exhaust temperature sensor fault 103 0# Exhaust temperature is too high 104 0# J5 pressure sensor fault

Check whether the temperature sensor is normal.
Check whether the temperature sensor is normal. Check for lack of refrigerant.
Check whether the sensor is connected properly

105 0# J6 pressure sensor fault

106

0# The pressure sensor pressure is too low

107

0# High pressure sensor pressure too high

108 0# Suction temperature sensor fault

Check whether the sensor is connected properly Check high pressure Check high pressure Check whether the temperature sensor is normal.

110 0# Suction temperature too low

Detect the amount of refrigerant

111 0# Emergency defrosting frequently

Detect the amount of refrigerant

112

0# The difference between suction and discharge temperature is unusual

Check whether the suction temperature and discharge temperature are normal.

113

0# Cool mode evaporation temperature Check whether low pressure or post-valve

is too low

temperature is normal

115

0# Ambient temperature limits compressor on

116

0# The inlet water temperature of the plate heat exchanger is too low

Check the inlet water temperature of the plate heat exchanger

117

0# The inlet water temperature of the plate heat exchanger is too high

Check the inlet water temperature of the plate heat exchanger

118 0# Fan 1 speed is abnormal

Check whether the PWM fan wiring is normal

119 0# Fan 2 speed is abnormal

Check whether the PWM fan wiring is normal

124

0# Frequency conversion communication Check whether the communication line is properly

failure

connected and in good contact.

125

0# Frequency conversion communication Inverter fault number is detailed in “Inverter fault

failure

table” Check the type of inverter fault

This fault prompt will appear when the inverter is

126

0# board frequency conversion model setting

connected for the first time. If the fault cannot be recovered automatically, power on again. If it still cannot recover, there is no corresponding press model

in the variable frequency drive.

129

0# Refrigerant sensor fault

gas

side

temperature Check whether the temperature sensor is normal.

130

0# Refrigerant sensor fault

liquid

side

temperature

Check whether the temperature sensor is normal.

164 0# Auxiliary electric heating overload /

165 0# water tank electric overload

/

166

0# The temperature of the outgoing Check the outlet water temperature of the plate heat

water is too low

exchanger

167

0# The temperature of the outgoing Check the outlet water temperature of the plate heat

water is too high

exchanger

– 55-

Err code MALFUNCTION OR PROTECTION

THE EXCLUSION METHOD

168
171
174
175
178 179 65535
Er.ocb (1)
Er.ocA (2)
Er.ocd (3)
Er.ocn (4)
Er.ouA (5)
Er.ocd (3)
Er.oud (6)
Er.oun (7)
Er.ouE (8)

0# Plate heat exchanger inlet water Check whether the sensor is connected normally;

temperature sensor fault

Check whether the temperature sensor is normal.

0# Plate heat exchanger outlet water Check whether the sensor is connected normally;

temperature sensor fault

Check whether the temperature sensor is normal.

0# The temperature difference between the board and the board is too large

Check the outlet water temperature of the plate heat exchanger and the return water temperature of the plate heat exchanger

0# The temperature difference between Check the outlet water temperature of the plate heat

the inlet and outlet of the plate heat exchanger and the return water temperature of the

exchanger is unusual

plate heat exchanger

0# Internal and external machine Check whether the communication line is properly

communication failure

connected and in good contact.

0# The protocol version of the board is The version of the internal machine protocol is too

too low

low, please upgrade the program.

Display communication failure

Check whether the connection between the indoor unit and the display screen is normal.

Instantaneous overcurrent at start

· Check the model and model parameters of the press · Wait for the press to stop completely before starting
it · Check whether the UVW output line is
short-circuited · Seek service

Speed up overcurrent

· Check the model and model parameters of the press · Check the input power supply · Select an inverter with a large power level · Extend the acceleration time · Seek service

Overcurrent during deceleration operation

· Check the model and model parameters of the press · Select the inverter with large power level · Extend the deceleration time

Constant speed running over current

· Check the model and model parameters of the press · Check the input power supply · Check the load · Select the inverter with large power level

Accelerate overvoltage

· Check the input power · Wait for the press to stop completely before starting
it · Check the model and model parameters of the press

Overvoltage during deceleration

· Check the input power · Check the model and model parameters of the press · Extend the deceleration time

Overvoltage at constant speed

· Check the input power supply · Check the model and model parameters of the press · Properly extend the acceleration and deceleration
time

Overvoltage during standby

· Check input power supply,wiring · Check input power supply,wiring · Check and replace

Undervoltage during operation

· Check installation wiring · Check input voltage · Adjust parameters to eliminate oscillation

– 56-

Err code MALFUNCTION OR PROTECTION Er.dcL(9) input phase loss

Er.PLI (10)

output phase loss

Er.PLo (11)

Power device protection

Er. FoP (12)

Inverter overheating

Er.oLI (14)

Inverter overload (PFC overheating)

Er.oLL (15)
Er.EEF (16) Er.oLP (17)
Er.ULd (18)

Motor overload PFC startup failed Instantaneous overcurrent at start Motor speed is too high

Er.Co1 (19)

Motor D axis current is too large

Er.Co2 (20)

Motor Q-axis current is too large

Er.EEP (21)

parameter storage failed

Er.CFE (22)

Communication exception

Er.ccF (23) Er.ArF (24)
Er. Aco (25)

Current detection failure PFC temperature detection failure Motor stalls during startup

THE EXCLUSION METHOD
· Check the output wiring, check the motor and cable
· Check the model and model parameters of the press · Rewiring · Add output reactor or filter · Seek service · Reduce the ambient temperature · Seek service · Clean the air duct or replace the fan · Check the load or choose a high-power inverter · Check fan, air duct and ambient temperature · Extend acceleration time · Check input voltage · Check press model and model parameters · Check the model and model parameters of the press · Check the model and model parameters of the press · Check the input voltage · Check the input voltage · Please power off for a few minutes, then power on again and start again, or seek service
· Check the press model and model parameters
· Check the press model and model parameters
· The phase sequence of the press is reversed, or the press is not connected · Check the model and model parameters of the press · Check the model and model parameters of the press · Start up after a few minutes of shutdown · Seek service · Replace the motor · Check the stator resistance of the motor and replace
the motor · Check the model and model parameters of the press · Start up after a few minutes of shutdown · Seek service · Replace the motor · Check the stator resistance of the motor and replace
the motor · Power off and then power on and try again, if the problemstill exists, please seek service · Check the control board and variable frequency drive
board and wiring · Check the communication parameters · Check the communication circuit wiring and
grounding · Power off and then power on and try again, if the problemstill exists, please seek service · Power off and then power on and try again, if the problemstill exists, please seek service · Check the model and model parameters of the press · Restart after a few minutes of shutdown · Check the model and model parameters of the press
– 57-

Err code MALFUNCTION OR PROTECTION

THE EXCLUSION METHOD

Er.PGo (26)
Er.rHo (27) Er. Abb (28) Er.Io1 (29) Er.Io2 (30)
Er.PnL (31)
Er.rr1 (32)
Er.PF1 (33)
Er.PF2 (34)
Er.PF2 (35)

· Replace the motor

· Check the stator resistance of the motor, replace the

motor

· Check the motor load

· Check the model and model parameters of the press

· Restart after a few minutes of shutdown

· Check the model and model parameters of the press

Motor stalls during operation

· Replace the motor