Century Comfort-Aire RSG1618S1P Service Manual page 12

CYLINDER CONTAINING
CLEAN R-410A TO BE
USED FOR FLUSHING
(Positioned to deliver liquid
A
refrigerant)
1
VAPOR LINE
SERVICE VALVE
EXISTING
INDOOR
B
UNIT
LIQUID LINE SERVICE
VALVE
RECOVERY
CYLINDER
D
Cylinder with clean R-410A (positioned to deliver liquid refrigerant) to the
A
vapor service valve.
B Refrigerant gauge set (low side) to the liquid line valve.
Refrigerant gauge set center port to inlet on the recovery machine with
C
an empty recovery tank connected to the gauge set.
D Connect recovery tank to recovery machine per machine instructions.
Figure 7.
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GAUGE
MANIFOLD
LOW
NEW
OUTDOOR
UNIT
OPENED CLOSED
TANK
RETURN
C
INLET
DISCHARGE
RECOVERY MACHINE
1. Connect gauges and equipment as shown in Figure 7.
2. Set the recovery machine for liquid recovery and start
the recovery machine. Open the gauge set valves to
allow the recovery machine to pull a vacuum on the
HIGH
existing system line set and indoor unit coil.
3. Position the cylinder of clean R-410A for delivery of
liquid refrigerant and open its valve to allow liquid
refrigerant to flow into the system through the vapor
line valve. Allow the refrigerant to pass from the
cylinder and through the line set and the indoor unit
coil before it enters the recovery machine.
4. After all of the liquid refrigerant has been recovered,
switch the recovery machine to vapor recovery so
that all of the R-410A vapor is recovered. Allow the
recovery machine to pull the system down to 0.
5. Close the valve on the inverted R-410A drum and the
gauge set valves. Pump the remaining refrigerant out
of the recovery machine and turn the machine off.
Issue 2136 508228-01