20
Expelling air
• Screw down the cap of both the gas shut-off valve
and the liquid shut-off valve as well as the nut of the
service port.
• Use an Allen wrench to turn the liquid shut-off valve
90° counterclockwise, and close it again after 10
seconds.
• Use soapy water to check for gas leakage, especially
at all joints. If there is no gas leakage, turn the liquid
shut-off valve 90° counter-clockwise again.
• Press the cork of the service port at the gas shut-off
valve. After 10 seconds, a foggy gas is discharged,
meaning the air inside has been expelled.
• Use an Allen wrench to turn both the liquid shut-off
valve and the gas shutoff valve counter-clockwise
until they are fully open and then replace the valve
caps and tighten them.
Expansion of the pipe orifice
• Use a pipe cutter to cut off the broken pipe orifice.
• Remove burrs at the cut of the pipe orifice.
• Insert a nut into the pipe and expand the orifice
with specified tools, reamers for example.
• Check the quality of expanding technique.
Adding refrigerant
• If the connecting pipe is longer than 7 metres, add refrigerant as needed. (Cool only type) added
amount A=(Lm-7m) x 15g/m; (Heat pump type) added amount A= (Lm-7m) x 50g/m. (A: amount of
added refrigerant, L: the length of connecting pipe)
liquid
connecting pipe
allen wrench
gas
connection
pipe
valve
nuts
service port
service port cap
gas shut-off valve
liquid shut-off valve
Copper pipe
Oblique
Roughness
Burr
Burr
Reamer
Outer diameter
A (mm)
6.35mm (1/4")
2.0-2.5
9.52mm (3/8")
3.0-3.5
12.7mm (1/2")
3.5-4.0
15.88mm (5/8")
4.0-4.5
The length of connecting pipe (m)
7
8
9
10
(Cool only type) added amount (g)
0
15
30
45
(Heat pump type) added amount (g)
0
50
100
150
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