- (05-04) -
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CAUTION
Keep the "piping limitation" for correct operation.
Allowable height difference:
z
If the height difference between the indoor unit and outdoor unit is larger than the allowable value:
*The pressure loss will be larger → Insufficient cooling and heating
*The refrigerant in liquid pipe will flush → Refrigerant flow noise generate at indoor unit
*The refrigerant oil will not return → Insufficient refrigerant oil resulting in compressor damage
If the height difference between indoor unit is larger than the allowable value:
*The refrigerant flow balance will be poor → Insufficient cooling and heating (poor balance)
*Refrigerant oil will collect in the piping or non-operating indoor units
→ Insufficient refrigerant oil resulting in compressor damage
Pipe length:
z
If the pipe length is longer than prescribed:
*The pressure loss will be larger → Insufficient cooling and heating
*Too much refrigerant will be charged → Liquid backs up resulting in compressor damage
*The refrigerant oil will not return → Insufficient refrigerant oil resulting in compressor damage
Pipe size:
z
If the pipe size is larger than designated size:
*The refrigerant flow velocity will drop. Refrigerant oil will not return to the outdoor unit.
→ Insufficient refrigerant oil resulting in compressor damage
*The refrigerant in liquid pipe will flush easily → Insufficient cooling and heating
If the pipe size is smaller than designated size:
*The refrigerant circulation volume will drop → Insufficient cooling and heating
*The pressure loss will be larger → Insufficient cooling and heating
