Installation Manual For Indoor Unit
! Caution
In installation, if there is refrigerant gas leakage, please take ventilation measures immediately. The refrigerant gas will generate poisonous gas upon contacting fire.
After installation, please verify that there is no refrigerant leakage. The leaked refrigerant gas will produce poisonous gas when meeting fire source such as heater and furnace etc.
Allowable pipe length and drop
These parameters differ according to the outdoor unit. See the instruction manual attached with the outdoor unit for details.
Pipe material and size
Pipe material | Phosphorus deoxidized copper seamless pipe (TP2) for air conditioner | |||
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| Gas side | ÿ12.70 | ||
Pipe size | Liquid side | ÿ6.35 | ||
(mm) |
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Gas side | ÿ15.88 | |||
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| Liquid side | ÿ9.52 | ||
Supplementary refrigerant
The refrigerant supplementation shall be as specified in the installation instructions attached with the outdoor unit R22
The adding procedure shall be aided with a measuring meter for a specified amount of supplemented refrigerant.
Requirement
Overfilling or underfilling of refrigerant will cause compressor fault. The amount of the added refrigerant shall be as specified in the instructions.
Connection of refrigerant pipe
Conduct flared connection work to connect all refrigerant pipes.
The connection of indoor unit pipes must use double spanners. 
The installing torque shall be as given in the following table.
Connecting pipe | Installing torque |
O.D.(mm) | |
ÿ6.35 | 11.8 |
ÿ12.70 | 49.0 (5.0 |
ÿ9.52 | 24.5 |
ÿ15.88 | 78.4 (8.0 |
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