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4. Refrigerant piping work
4.5. Purging procedures leak test
PURGING PROCEDURES
Connect the refrigerant pipes (both the liquid and gas pipes) between the indoor
and the outdoor units.
Remove the service port cap of the stop valve on the side of the outdoor unit
gas pipe. (The stop valve will not work in its initial state fresh out of the factory
(totally closed with cap on).)
Connect the gage manifold valve and the vacuum pump to the service port of
the stop valve on the gas pipe side of the outdoor unit.
Run the vacuum pump. (Vacuumize for more than 15 minutes.)
Check the vacuum with the gage manifold valve, then close the gage manifold
valve, and stop the vacuum pump.
Leave it as is for one or two minutes. Make sure the pointer of the gage mani-
fold valve remains in the same position. Confirm that the pressure gage show
-0.101 MPa (-760 mmHg)
Stop valve
*Close
Stop valve
*Open
Hexagonal wrench
Service port
*4 to 5 turns
5. Electrical work
5.1. Outdoor unit (Fig. 5-1, Fig. 5-2, Fig. 5-3, Fig. 5-4)
Remove the service panel.
1
Wire the cables referring to the Fig. 5-1, Fig. 5-, Fig. 5-3 and the Fig. 5-4.
2
SUZ-SA71VA
L N
1 S 2 S
S3
For Power supply
Fig. 5-1
Compound pressure
-0.101 MPa
gauge (for R410A)
(-760 mmHg)
Pressure gauge
(for R410A)
Gauge manifold
valve (for R410A)
Handle
Handle High
Low
Charge hose
Stop
(for R410A)
valve
Vacuum
(or the vacuum
pump
pump with
Window
the function
Adapter for
to prevent the
Charge hose
preventing
back flow)
(for R410A)
the back flow
S1
S2
S3
1
2
Indoor unit
A
Outdoor unit
B
Wired main switch (Earth leakage breaker)
C
Earth
D
Remove the gage manifold valve quickly from the service port of the stop valve.
After refrigerant pipes are connected and evacuated, fully open all stop valves
on gas and liquid pipe sides.
Operating without fully opening lowers the performance and causes trouble.
Pipe length :
7 m maximum
No gas charge is needed.
Tighten the cap to the service port to obtain the initial status.
Retighten the cap.
Leak test
Pipe length exceeding 7 m
Charge the prescribed
amount of gas.
5
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