Samsung Electronics
4-31
• Use the vacuum pump to remove N2 gas or air inside the indoor unit and pipes.
Installation
1. Tighten all pipe connections (A, B, C, D)
to prevent any leakage.
3. Remove the cap on the opposite side of the
Suction tube connection (A) and connect a hose
from the pressure guage of which other end is
connected to the vacuum pump.
4. Operate the vacuum pump enough until the
pressure guage indicates “0”.
5. Disconnect the hose from the suction valve
cafully not to break the vacuum.
2. Check that the suction and liquid valves are
turned off clockwise to close the outdoor unit.
6. Turn on the suction and liquid valves
counterclockwise to open the outdoor unit to the
indoor unit.
7. Check the leakage on the connections.
(A, B, C, D)
8. Check each valve for leakage.
Indoor Unit
D C
B A
Outdoor Unit
Half union
Suction(gas)
pipe side
Suction(gas)
valve
Liquid
pipe side
Liquid
valve
Suspension hook
High
pressure
gauge
Hand
wheel
Finger tight
fittings
Connected to
high pressure
side
Charging
line
Vacuum pump
For mounting
other end of
hose when
not in use
3-way valve
Liquid
Valve
Suction
Valve
Duct-ADH1800E-2-2 6/27/00 10:37 AM Page 4-31
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