Daikin ARXC20BV1B, Руководство по установке

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• Do not use mineral oil on fl ared part.
• Prevent mineral oil from getting into the system as this would
reduce the lifetime of the units.
• Never use piping which has been used for previous installations.
• Only use parts which are delivered with the unit.
• Do never install a drier to this R32 unit in order to guarantee its
lifetime.
• The drying material may dissolve and damage the system.
• Incomplete
fl aring may cause refrigerant gas leakage.
WARNING
Do not reuse joints which have been used once already.
CAUTION
4
REFRIGERANT PIPING
1) Use the fl are nut fi xed to the main unit. (To prevent cracking of the fl are nut by aged deterioration.)
2) To prevent gas leakage, apply refrigeration oil only to the inner surface of the fl are. (Use refrigeration oil for R32.)
3) Use torque wrenches when tightening the fl are nuts to prevent damage to the fl are nuts and gas leakage.
CAUTION
Align the centres of both flares and tighten the flare nuts 3 or 4 turns by hand. Then tighten them fully with the torque
wrenches.
1. Cautions on pipe 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.
2. Selection of copper and heat insulation materials
When using commercial copper pipes and fi ttings, observe the following:
1) Insulation material: Polyethylene foam
Heat transfer rate: 0.041 to 0.052W/mK (0.035 to 0.045kcal/(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
O.D. 12.7mm O.D. 6.4mm I.D. 14-16mm I.D. 8-10mm
Minimum bend radius Thickness 10mm Min.
40mm or more 30mm or more
Thickness 0.8mm
(C1220T-O)
3) Use separate thermal insulation pipes for gas and liquid refrigerant pipes.
Ø Tube, D A (mm)
Inch mm Imperial
(Wing-nut Type)
Rigid
(Clutch Type)
1/4" 6.40 1.3 0.7
3/8" 9.52 1.6 1.0
1/2" 12.70 1.9 1.3
5/8" 15.88 2.2 1.7
3/4" 19.05 2.5 2.0
Flare’s inner surface
must be fl aw-free
The pipe end must
be evenly fl ared in
a perfect circle.
Make sure that the
fl are nut is fi tted.
Check
[Apply oil]
Apply refrigeration oil to the
inner surface of the
fl are.
Do not apply refrigeration
oil to the outer surface.
Do not apply refrigeration oil to
the fl are nut to avoid tightening
with excessive torque.
Flare nut
[Tighten]
Torque wrench
Spanner
Pipe union
Flare nut
Wall
Rain
Be sure to
place a cap.
If no fl are cap is
available, co ver the
fl are mouth with tape to
keep dirt or water out.
Pipe Size, mm (in) Torque, Nm/(ft-lb)
6.40 (1/4") 18 (13.3)
9.52 (3/8") 42 (31.0)
12.70 (1/2") 55 (40.6)
15.88 (5/8") 65 (48.0)
19.05 (3/4") 78 (57.6)
Inter-unit wire
Drain hose
Liquid pipe
insulation
Gas pipe
insulation
Finishing tape
Gas pipe
Liquid pipe