5
4. Installing the refrigerant piping
A
Flare cutting dimensions
B
Flare nut tightening torque
Copper pipe O.D.
Flare dimensions
Flare nut O.D.
Tightening torque
(mm)
øA dimensions (mm)
(mm)
(N·m)
ø6.35
8.7 - 9.1
17
14 - 18
ø9.52
12.8 - 13.2
22
34 - 42
ø12.7
16.2 - 16.6
26
49 - 61
ø15.88
19.3 - 19.7
36
69 - 82
100-120
90
°
±
0.5
°
ø
A
R0.4~R0.8
A
45
°±
2
°
B
C
D
* In case that the flare nut attached to indoor gas valve is used, gas leakage or even
pipe extraction will occur.
• When bending the pipes, be careful not to break them. Bend radii of 100 mm to 150
mm are sufficient.
• Make sure the pipes do not contact the compressor. Abnormal noise or vibration
may result.
1
Pipes must be connected starting from the indoor unit.
Flare nuts must be tightened with a torque wrench.
2
Flare the liquid pipes and gas pipes and apply a thin layer of refrigeration oil
(Applied on site).
• When usual pipe sealing is used, refer to Table 1 for flaring of R410A refrigerant
pipes.
The size adjustment gauge can be used to confirm A measurements.
Indoor unit (Liquid)
Indoor unit (Gas)
Outdoor unit (Liquid)
Outdoor unit (Gas)
RP3
Flare nut attached to
indoor liquid valve
Flare nut attached to
indoor gas valve
Flare nut attached to
outdoor liquid valve
Flare nut attached to
outdoor gas valve
RP4-6
Flare nut attached to
indoor liquid valve
* Flare nut in outdoor
unit accessories
Flare nut attached to
outdoor liquid valve
Flare nut attached to
outdoor gas valve
Copper pipe O.D.
A (mm)
(mm)
Flare tool for R410A
Flare tool for R22·R407C
Clutch type
ø6.35 (1/4")
0 - 0.5
1.0 - 1.5
ø9.52 (3/8")
0 - 0.5
1.0 - 1.5
ø12.7 (1/2")
0 - 0.5
1.0 - 1.5
ø15.88 (5/8")
0 - 0.5
1.0 - 1.5
Refrigerant
piping
A
Die
B
Copper pipe
Refrigerant and Drainage Piping Sizes
Item
Model
RP3-6
Liquid
ODø9.52 (3/8")
Gas
ODø15.88 (5/8")
Drainage piping
PVC ODø32 (1-1/4")
Table 1 (Fig. 4-2)
Fig. 4-1
A
A
B
Fig. 4-2
4.1. Precautions for devices that use R410A refrigerant
• Refer to page 3 for precautions not included below on using air conditioners
with R410A refrigerant.
• Use ester oil, ether oil, alkylbenzene oil (small amount) as the refrigeration oil
applied to the flared sections.
• Use C1220 copper phosphorus, for copper and copper alloy seamless pipes,
to connect the refrigerant pipes. Use refrigerant pipes with the thicknesses
specified in the table to the below. Make sure the insides of the pipes are
clean and do not contain any harmful contaminants such as sulfuric com-
pounds, oxidants, debris, or dust.
Warning:
When installing or moving the air conditioner, use only the specified refriger-
ant (R410A) to charge the refrigerant lines. Do not mix it with any other refriger-
ant and do not allow air to remain in the lines. Air enclosed in the lines can
cause pressure peaks resulting in a rupture and other hazards.
RP3-6
Liquid pipe
ø9.52 thickness 0.8 mm
Gas pipe
ø15.88 thickness 1.0 mm
• Do not use pipes thinner than those specified above.
4.2. Connecting pipes (Fig. 4-1)
• When commercially available copper pipes are used, wrap liquid and gas pipes
with commercially available insulation materials (heat-resistant to 100 °C or more,
thickness of 12 mm or more).
• The indoor parts of the drain pipe should be wrapped with polyethylene foam insu-
lation materials (specific gravity of 0.03, thickness of 9 mm or more).
• Apply thin layer of refrigerant oil to pipe and joint seating surface before tightening
flare nut.
A
• Use two wrenches to tighten piping connections.
B
• Use leak detector or soapy water to check for gas leaks after connections are com-
pleted.
• Apply refrigerating machine oil over the entire flare seat surface.
C
• Use the flare nuts as follows.
D
Table 1 (Fig. 4-1)
Summary of Contents for Mr.Slim PUNZ-RP-HA-A
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