Ballu BSGI 09, Service Manual

Page: 12 / 51

4
4
.
.
R
R
E
E
F
F
R
R
I
I
G
G
E
E
R
R
A
A
N
N
T
T
F
F
L
L
O
O
W
W
D
D
I
I
A
A
G
G
R
R
A
A
M
M
EVACUATION 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 for more than 15 minutes and at this time confirm that the pressure gage
indicates -0.1 Mpa (-76 cmHg).
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 manifold valve remains
in the same position.
Close
Open
Hexagonal
wrench
Stop valve
pipe
Connection
Gage manifold valve
Stop valve
Liquid pipe
Stop valve
Hexagonal wrench
Gas pipe
Caps
Service port
Vacuum pump
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
7m maximum
No gas charge is
needed.
Pipe length
exceeding 7m
Charge the prescribed
amount of gas.
Tighten the cap to the service port to obtain the initial status.
Retighten the cap.
Leak test
4-3. Evacuation direction
：
9
BSGI 09(12)