Refrigerant Recovery Method - Daikin SkyAir RZF-A Series Service Manual

SiME281906E
1.3

Refrigerant Recovery Method

Make sure to recover the refrigerant when replacing components of the refrigerant system. The
procedure for refrigerant recovery is as follows.
Note that care must be taken to ensure the temperature does not increase too much during
refrigerant recovery for models with a fusible plug. (The fusible plug ejects refrigerant at
temperatures of 60°C and over)
Refrigerant recovery procedure
1. Refrigerant recovery from gas pipe (Approximately 1 min)
Close gas stop valve (liquid stop valve: open) and recover refrigerant from gas stop valve port.
2. Refrigerant recovery from liquid pipe (Approximately 1 min)
Recover refrigerant from liquid stop valve port.
3. Refrigerant recovery from outdoor unit (Approximately 2-3 min)
Recover refrigerant from outdoor unit refrigerant recovery port (1).
If refrigerant recovery port (1) pressure becomes lower than gas stop valve port pressure,
refrigerant will be recovered simultaneously from the gas stop valve port. Open gas stop valve
(2), and open the gas stop valve port (3) gradually to avoid pressure from rising rapidly.
Part 6 Service Diagnosis
Gas
stop valve
Indoor
Unit
CLOSE
Liq.
stop valve
OPEN
Liq. pipe
Gas pipe
Gas
stop valve
Indoor
Unit
CLOSE
Liq.
stop valve
OPEN
Liq. pipe
Gas pipe
Gas
stop valve
Indoor
Unit
Liq.
stop valve
OPEN
Liq. pipe
Gas pipe
Pressure gauge
Charge
hose
CLOSE
Ref.
recovery
port
Outdoor
Unit
Ref. recovery
machine
Pressure gauge
OPEN
Ref.
recovery
port
Outdoor
Unit
Ref. recovery
machine
(3)
Pressure gauge
CLOSE OPEN
OPEN
Ref.
recovery
port
(1)
Outdoor
Unit
Ref. recovery
machine
Maintenance Inspection
OPEN
Tank
CLOSE
Tank
(2)
CLOSE OPEN
Tank
100