Installing the air conditioner
Refrigerant pipe work
Insulating the pipes
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Make sure to insulated the refrigerant pipes with an insulation tape. If the
pipe is not insulated, condensate may form and drop into the indoor.
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Wind the refrigerant pipes and the drain hose with vinyl tapes.
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When you bend the pipe, try to secure large bending radius (over 100 mm)
to prevent the copper pipe from distorting.
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Use foamed polyethylene or EPDM foam, with thickness over 7 mm, as an
insulator.
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If the pipe is installed in a place with humidity over 80 % (such as within a
pit of a building, basement, sea shore, near hot spring or lake etc), use an
insulator with a thickness over 10 mm.
Vinyl
tape
Drain hose
Pipe insulator
Indoor/
outdoor unit
communication
cable
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Insulate the high pressure (liquid pipe)/low pressure (gas pipe) pipe, and finish it by winding up the vinyl tape around it.
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Make sure to insulate the pipe with no gap or cracks, and use adhesive between the connection part of the insulator to
prevent moisture from entering.
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Make sure that the thickness of the insulator doesn’t get thinner on the bending part of the pipes.
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Use extra insulator to secure thickness when the insulator becomes thinner.
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When the pipe hanger is installed, wind the extra PE Foam type insulator (over 5 mm) with the width 3 times wider than
the hanger. (Do not use cable tie as an hanger.)
Oil trap
Check the following list and install an oil trap.
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Install an oil trap only when the outdoor unit is at a higher level than the indoor unit.
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Based on cooling operation, install it on the gas side pipe only.
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Install the oil trap only in between the outdoor unit and the first branch joint and it should be installed at every 10 m.
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Radius of curvature (R) on the oil trap are as follows:
(Unit: mm)
Indoor unit
Branch joint
Cut on insulation
Insulation
Outdoor unit
Oil trap
(Gas side pipe:
Install it at every
10 m)
Pipe diameter (D)
Radius of curvature (R)
12.70
25 and over
15.88
32 and over
19.05
38 and over
22.23
41 and over
25.40
51 and over
28.60
57 and over
31.75
60 and over
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Height of the oil trap (H): 4R ≤ H ≤ 6R
ENGLISH-40
