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Installation of indoor unit
INSTALATION INSTRUCTIONS
Connecting the refrigerant pipe
1) Use torque wrenches when tightening the flare nuts to prevent damage to
the flare nuts and gas leaks
2) Align the centres of both flares and tighten the flares and tighten the flare nuts 3 or 4 turns by hand.
Then tighten them fully with the torque wrenches
3) To prevent gas leakage, apply refrigeration oil on both inner and outer surfaces in the flare. (Use refrigeration
oil for R410A.
Flare nut tightening torque
Gas side
Liquid side
09K/12K
18K
09K/12K/18K
3/8 inch
1/2 inch
1/4 inch
31-35 N.m
50-55 N.m
15-20 N.m
Caution on piping handling
1)Protect the open end of the pipe against dust and moisture.
2)All pipe bends should be as gentle as possible. Use a pipe bender for
bending.(Bending radius should be 30 to 40mm or larger.)
Selection of copper and heat insulation materials
• When using commercial copper pipes and fittings, observe the following:
1) Insulation material: Polyethylene foam
Heat transfer rate:0.041 to 0.052W/mK(0.035 to 0.045kca/(mh
°C) Refrigerant
gas pipe's surface temperature reaches 110
°C max. Choose heat insulation
materials that will withstand this temperature
2)Be sure to insulate both the gas and liquid piping and to provide insulation dimensions as below.
Gas side
Liquid side
Gas pipe thermal insulation
Liquid pipe
thermal insulation
09K/12K
18K
09K/12K
18K
O.D. 9.5mm
O.D. 12.7mm
O.D. 6.4mm
I.D. 12-15mm
I.D. 14-16mm
I.D. 8-10mm
Thickness 0.8mm
Thickness 10mm Min.
3)Use separate thermal insulation pipes for gas and liquid refrigerant pipes
Flare
nut
Open-end wrench (fixed)
Connection pipe
nut
Содержание ACP-12CT35GEEI
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