47
Λ
9. Charge/recovery of refrigerant
9-1. Refrigerant charging
(1) Outdoor unit is charged with refrigerant when being delivered but additional
refrigerant shall be charged for some part of system.
(2) After completion of vacuum, keep the following instructions to fill the refrigerant
into the service port.
1) Check whether the stop valve of liquid and gas side are completely closed.
2) Fill the specified amount of refrigerant from the liquid stop valve service port
at the compressor stopped.
●
If the length of refrigerant piping is longer than specified, be sure to charge the refrigerant.
●
Do not charge the refrigerant from the gas side service port.
●
If the refrigerant charging is not done in 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 gas stop valve. If unavoidable,
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 15
O
C, it is better to charge in cooling operation,
and if the temperature is below that, it is better to charge in heating operation.
gas side stop valve (service port)
liquid side stop 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
DVM TM(chapter5-2)_E<03759 6/14/02 2:22 PM Page 47
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