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Installation Procedure
CAUTION
• Make the electrical connection and leave the system
into "stand by mode". Do not turn on the system! This
is necessary for better vacuum operation (full OPEN
position of Electronic Expansion Valve - EEV -).
Tightening torque for body cap
(Refer to the table)
Charging core
Tightening torque for charging
port cap (Refer to the table)
3 Open the valve of the low pressure side of manifold
gauge counter clockwise.
4 Purge the air from the system using vacuum pump
for about 30 minutes.
• Close the valve of the low pressure side of
manifold gauge clockwise.
• Make sure that pressure gauge show -0.1MPa(-
76cmHg) after about 1 hour. This procedure is very
important in order to avoid gas leak.
• Turn off the vacuum pump.
• Remove the hose of the low pressure side of
manifold gauge.
English
22
5 Set spindle of both liquid side and gas side of stop
valve to the open position.
6 Mount the valve stem nuts and the service port cap
to the valve, and tighten them with a torque wrench.
Outer diameter
Step 9 Performing the gas leak test
Before completing the installation (insulation of the
cables, hose and piping and fixing of the indoor unit to
the installation plate), you must check that there are no
Vacuum
gas leaks.
Pump
To check for
gas leaks on
Outdoor unit
Spindle
Indoor unit
Outdoor unit
B(Gas)
A(Liquid)
• The designs and shape are subject to change
according to the model.
Tightening torque
Body cap
(mm)
(N•m)
ø 6.35
20 to 25
ø 9.52
20 to 25
ø 12.70
25 to 30
ø 15.88
30 to 35
Then, using a leak detector,check
the...
Valves on sections A and B.
Flare nuts at the end of sections C
Indoor unit
Charging port cap
(N•m)
10 to 12
the...
and D.
C
D
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