SiUS30-1301
Field Setting from Condensing Unit
Field Setting
123
3.7.4 Setting of Refrigerant Additional Charging Operation
When additional refrigerant is not charged all with condensing unit in stop mode, operate the condensing unit and charge
the liquid refrigerant from the service port of liquid stop valve. The additional charging operation is activated by Branch
Selector button switch on the condensing unit PCB.
Additional refrigerant charge total flow
Note:
The stop valve operations are different from Heat Pump and Heat Recovery connection, refer to following page for detail.
Confirm discharge, suction and
liquid stop valves closed.
Is all refrigerant charged?
Is all refrigerant charged?
YES
NO
YES
NO
Turn OFF the power.
Charge through service port of
liquid stop valve.
Open discharge gas, liquid,
suction gas
stop valve.
Open liquid stop valve.
Disconnect charge hose.
End of charge method.
Stop refrigerant charge.
STEP 1
Start additional refrigerant charge mode.
(Setting Mode 2 : Refer to operation procedure
detail on next page.)
Open discharge & suction
gas
stop valve.
Liquid side stop valve:
1. Fully open the liquid side stop valve.
2. After 10 minutes, fully close liquid line stop
valve and then, open the valve by turning
180º.
(
∗
)
STEP 2
Additional
charge
with
compressor
operation
Additional
charge
without
compressor
operation