Samsung ACH1800E Technical Manual page 42

Air-Purge Procedure
3-5. Air-Purge Procedure
G Use the vacuum pump to remove N2 gas or air inside the indoor unit and pipes.
Tighten all pipe connections (A, B, C, D)
1
to prevent any leakage.
Check that the suction and liquid valves are
2
turned off clockwise to close the outdoor unit.
Remove the cap on the opposite side of the
Suction tube connection (A) and connect a hose
3
from the pressure gauge of which other end is
connected to the vacuum pump.
Operate the vacuum pump enough until the
4
pressure gauge indicates "0".
Disconnect the hose from the suction valve
5
carefully not to break the vacuum.
Turn on the suction and liquid valves
counterclockwise to open the outdoor unit to
6
the indoor unit.
Check the leakage on the connections.
7
(A, B, C, D)
8 Check each valve for leakage.
M
M
M
M
M
M
M
For mounting
Suction
Liquid
other end of
Valve
Valve
hose when
not in use
3-way valve
Indoor Unit
D
Liquid
pipe side
Liquid
valve
B
Outdoor Unit
3
INSTALLATION
Suspension hook
High
pressure
gauge
Hand
wheel
Finger tight
fittings
Connected to
high pressure
side
Charging
line
Vacuum pump
Half union
C
Suction(gas)
pipe side
Suction(gas)
valve
A
SAMSUNG | 41