WH-ADC0916H9E8, WH-UD09HE8, WH-UD12HE8, WH-UD16HE8, WH-UX09HE8, WH-UX12HE8, WH-UX16HE8, WH-UQ09HE8, WH-UQ12HE8, WH-UQ16HE8 - Panasonic Air Conditioner Service Manual (repair manual). Page 5

5 

 WARNING 

18. 

During installation, install the refrigerant piping properly before run the compressor. Operation of compressor without fixing refrigeration 
piping and valves at opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury 
etc. 

19. 

During pump down operation, stop the compressor before remove the refrigeration piping. Removal of refrigerant piping while compressor 
is operating and valves are opened will cause suck-in of air, abnormal high pressure in refrigerant cycle and result in explosion, injury etc. 

20. 

Tighten the flare nut with torque wrench according to specified method. If the flare nut is over tightened, after a long period, the flare may 
break and cause refrigerant gas leakage. 

21. 

After completion of installation, confirm there is no leakage of refrigerant gas. It may generate toxic gas when the refrigerant contacts with 
fire. 

22. 

Ventilate the room if there is refrigerant gas leakage during operation. Extinguish all fire sources if present. It may cause toxic gas when the 
refrigerant contacts with fire. 

23.  Only use the supplied or specified installation parts, else, it may causes unit vibrate loose, water leakage, electrical shock or fire. 

24.  If there is any doubt about the installation procedure or operation, always contact the authorized dealer for advice and information. 

25.  Select a location where in case of water leakage, the leakage will not cause damage to other properties. 

26. 

When installing electrical equipment at wooden building of metal lath or wire lath, in accordance with electrical facility standard, no electrical 
contact between equipment and building is allowed. Insulator must be installed in between. 

27. 

Any work carried out on the Tank Unit after removing any panels which is secured by screws, must be carried out under the supervision of 
authorized dealer and licensed installation contractor. 

28.  This system is multi supply appliance. All circuits must be disconnected before accessing the unit terminals. 

29. 

For cold water supply has a backflow regulator, check valve or water meter with check valve, provisions for thermal expansion of water in 
the hot water system must be provided. Otherwise it will cause water leakage. 

30. 

The piping installation work must be flushed before Tank Unit is connected to remove contaminants. Contaminants may damage the Tank 
Unit components. 

31. 

This installation may be subjected to building regulation approval applicable to respective country that may require to notify the local 
authority before installation. 

32. 

The Tank Unit must be shipped and stored in upright condition and dry environment. It may laid on its back when being moved into the 
building. 

33. 

Work done to the Tank Unit after remove the front plate cover that secured by screws, must be carried out under the supervision of 
authorized dealer, licensed installation contractor, skilled person and instructed person. 

34. 

This unit must be properly earthed. The electrical earth must not be connected to a gas pipe, water pipe, the earth of lightening rod or a 
telephone. Otherwise there is a danger of electrical shock in the event of an insulation breakdown or electrical earth fault in the Tank Unit. 

 

 CAUTION 

1. 

Do not install the Tank Unit at place where leakage of flammable gas may occur. In case gas leaks and accumulates at surrounding 
of the unit, it may cause fire. 

 

2. 

Do not release refrigerant during piping work for installation, re-installation and during repairing a refrigeration parts. Take care of the 
liquid refrigerant, it may cause frostbite. 

 

3.  Do not install this appliance in a laundry room or other high humidity location. This condition will cause rust and damage to the unit. 

 

4. 

Make sure the insulation of power supply cord does not contact hot part (i.e. refrigerant piping, water piping) to prevent from 
insulation failure (melt). 

 

5. 

Do not apply excessive force to water pipes that may damage the pipes. If water leakage occurs, it will cause flooding and damage to 
other properties. 

 

6.  Do not transport the Tank Unit with water inside the unit. It may cause damage to the unit. 

 

7. 

Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room and damage the 
furniture. 

8.  Select an installation location which is easy for maintenance. 

9. 

Power supply connection to Tank Unit. 
• Power supply point should be in easily accessible place for power disconnection in case of emergency. 
• Must follow local national wiring standard, regulation and this installation instruction. 
• Strongly recommended to make permanent connection to a circuit breaker. 
  - Power Supply 1: Use approved 20A 4-poles circuit breaker with a minimum contact gap of 3.0mm. 
  - Power Supply 2: Use approved 20A 4-poles circuit breaker with a minimum contact gap of 3.0mm. 

10.  Ensure the correct polarity is maintained throughout all wiring. Otherwise, it will cause electrical shock or fire. 

11. 

After installation, check the water leakage condition in connection area during test run. If leakage occurs, it will cause damage to other 
properties. 

12.  If the Tank Unit not operates for long time, the water inside the Tank Unit should be drained. 

13. 

Installation work. 
It may need three or more people to carry out the installation work. The weight of Tank Unit might cause injury if carried by one person.