Frigidaire FRS095YC1 Instruction Manual page 15

Air purging with vacuum pump
1. Check that each tube(both liquid and gas side tubes) between the indoor
and outdoor units have been properly connected and all wiring for the test
run has been completed. Remove the service valve caps from both the gas
and the liquid side on the outdoor unit. Note that both the liquid and the gas
side service valves on the outdoor unit are kept closed at this stage.
2. When relocate the unit to another place, perform evacuation using vacuum
pump.
3. Pipe length and refrigerant amount:
Air purging
Connective
metod
pipe length
Less than 5 m Use vacuum pump.
5~10 m Use vacuum pump.
Caution in handling the packed valve
1. Open the valve stem until it hits against the stopper. Do not try to open it
further.
2. Securely tighten the valve stem cap with a spanner or the like. Valve stem
cap tightening torque (See Tightening torque table in page 19).
Refrigerant
Outdoor unit Indoor unit
Gas
A
C
D
B
Packed valve
Half union
27
Additional amount of
refrigerant to be charged
R22:
30g (Pipe length-5)
R410:
20g (Pipe length-5)
Flare nut
Stopper
Cap
Valve body
Valve stem
When using the vacuum pump
For method of using a manifold valve, refer to its operation manual.
1. Completely tighten the flare nuts,
A, B, C, D, connect the manifold
valve charge hose to a charge port
of the low-pressure valve on the
gas pipe side.
2. Connect the charge hose
connection to the vacuum pump.
3. Fully open the handle Lo of the
manifold valve.
4. Operate the vacuum pump to
evacuate. After starting evacuation,
slightly loose the flare nut of the Lo
valve on the gas pipe side and
check that the air is entering
(Operation noise of the vacuum
pump changes and a compound
meter indicates 0 instead of minus)
5. After the evacuation is complete,
fully close the handle Lo of the
manifold valve and stop the
operation of the vacuum pump.
Make evacuation for 15 minutes or
more and check that the compound
meter indicates -76cmHg (-1x10
Pa).
6. Turn the stem of the packed valve
B about 45o counterclockwise for
6~7 seconds after the gas coming
out, then tighten the flare nut again.
Make sure the pressure display in
the pressure indicator is a little
higher than the atmosphere
pressure.
7. Remove the charge hose from the
Low pressure charge hose.
8. Fully open the packed valve stems
B and A.
9. Securely tighten the cap of the
packed valve.
Indoor unit
Outdoor unit
Manifold valve
Charge hose
-76cm/Hg
Handle Hi
Handle Lo
Charge hose
Vacuum pump
28