45
Λ
9. Charge/recovery of refrigerant
9-1. Refrigerant charging
(1) Outdoor unit is pre charged with refrigerant but additional refrigerant will be required.
(2) After completion of evacuation, use the following instructions to charge
the refrigerant into the service port.
1) Check whether the shut offs liquid and suction line are completely closed.
2) Fill the specified amount of refrigerant into liquid shut off valve service port
with the compressor stopped.
●
If the length of refrigerant piping is longer than specified, unit will require additional refrigerant.
●
Do not charge the refrigerant into the suction service port.
●
If the refrigerant charging is not done by the above method, press the refrigerant charging
button
✻
1)
on outdoor unit PCB to operate the unit. After approximately 30 minutes,
charge the specified amount of refrigerant to the service port of suction valve. Check the
pressure table as per the outdoor temperature to charge the refrigerant.
●
When refrigerant is charged with cooling operation, the refrigerant charge through
port of the stop valve in gas pipe is possible, but refrigerant charge port separately
available should be used to input the refrigerant operation heating operation.
If the outdoor temperature is more than 59
O
F, it is better to charge in cooling operation,
and if the temperature is below that, it is better to charge in heating operation.
suction shut off valve (service port)
liquid shut off valve (service port)
scale vacuum pump
indoor unit
Outdoor unit
Key 1
Pump down
Key 2
Refrigerant charge
Key 3
Reset
Key 4
Test-operation
✻ 1) MUF-✻✻✻
✻ 1) RVMH(C)-✻✻✻
Press times
1
2
3
Key 1
Heating refrigerant charge
Heating test operation
Key 2
Cooling refrigerant charge
Cooling test operation
Pump down
Key 3
Reset
Key 4
View Mode
5-2.Installation_TM_E_06890 2/27/03 10:16 AM Page 45
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