14
Installation Procedure
English
Installation Pr
oc
edur
e
Step 8 Performing the gas leak test
To identify potential gas leaks on the indoor unit, inspect the connection area of each refrigerant pipe using a leak
detector for R-410A.
Before creating a vacuum and adding refrigerant, pressurize the whole system with nitrogen using a cylinder with a
pressure reducer at a pressure above 4.1MPa (594.7 PSI) in order to detect leaks on the refrigerant fittings.
Made vacuum for 15 minutes and pressurizing system with nitrogen.
Liquid side
Gas side
Insulator
Step 9 Insulating the refrigerant pipes
Once you have checked that there are no leaks in the system, you can insulate the piping and hose.
1
Select the insulation of the refrigerant pipe.
• Insulate the gas side and liquid side pipe, noting the insulation thickness that must differ according to the pipe size.
• Standard: Less than an indoor temperature of 86°F (30°C), with humidity at 85%. If installing in a high humidity
environment, use one grade thicker insulator by referring to the table below. If installing in an unfavourable
environment, use thicker one.
• The heat-resistance temperature of the insulator must be more than 248°F (120°C).
Pipe
Outer diameter
Insulation Type (Cooling, Heating)
Remarks
General
[86°F(30°C), 85%]
High humidity
[86°F(30°C), over 85%]
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mm
inch
mm
inch
mm
inch
Liquid pipe
6.35~9.52
1/4~3/8
9
3/8
9
3/8
Heating resisting
temperature over
248°F(120°C)
12.7~50.80
1/2~2
13
1/2
13
1/2
Gas pipe
6.35
1/4
13
1/2
19
3/4
9.52~25.4
3/8~1
19
3/4
25
1
28.58~44.45
1 1/8~1 3/4
19
3/4
32
1 1/4
50.8
2
25
1
38
1 1/2
• When installing insulation in the places and conditions below, use the same insulation that is used for high humidity
conditions.
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Summary of Contents for AM AN1PCH Series
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