Mitsubishi Electric Mr.SLIM PCA-RP GA Série Manuel D'installation page 5

4. Installing the refrigerant piping
A B
45°±2°
Fig. 4-1
A Flare cutting dimensions
Copper pipe O.D. Flare dimensions
(mm) øA dimensions (mm)
ø6.35
ø9.52 12.8 - 13.2
ø12.7 16.2 - 16.6
ø15.88 19.3 - 19.7
ø19.05 23.6 - 24.0
A
A
B
Fig. 4-2
Copper pipe O.D.
Flare tool for R22·R407C
(mm)
ø6.35 (1/4")
ø9.52 (3/8")
ø12.7 (1/2")
ø15.88 (5/8")
ø19.05 (3/4")
C
DE
G
Fig. 4-3
C
8.7 - 9.1
A Die
B Copper pipe
A (mm)
Flare tool for R410A
Clutch type
0 - 0.5 1.0 - 1.5
0 - 0.5 1.0 - 1.5
0 - 0.5 1.0 - 1.5
0 - 0.5 1.0 - 1.5
0 - 0.5 1.0 - 1.5
A
C
D
E
F
4.1.2. For devices that use 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.
Liquid pipe ø6.35 thickness 0.8 mm
Gas pipe ø12.7 thickness 0.8 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-
D
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.
• Use two wrenches to tighten piping connections.
• Use refrigerant piping insulation provided to insulate indoor unit connections. Insu-
late carefully.
B Flare nut tightening torque
Copper pipe O.D.
(mm)
ø6.35
ø6.35
ø9.52
ø12.7
ø12.7
ø15.88
ø15.88
ø19.05
C Apply refrigerating machine oil over the entire flare seat surface.
D Use correct flare nuts meeting the pipe size of the outdoor unit.
Available pipe size
RP35, 50
ø6.35
Liquid side
ø9.52
ø12.7
Gas side ø15.88
–
P25
ø6.35
Liquid side
–
ø12.7
Gas side –
–
: Factory flare nut attachment to the heat-exchanger.
4.3. Indoor unit (Fig. 4-3)
Installing procedures
1. Slide the supplied pipe cover 2 over the gas tubing until it is pressed against the
sheet metal inside the unit.
2. Slide the provided pipe cover 3 over the liquid tubing until it is pressed against
B
the sheet metal inside the unit.
3. Tighten the pipe covers 2 and 3 at the both ends (15 - 20 mm) with the supplied
bands 4.
A Gas tubing
B Liquid tubing
C Band 4
D Pipe cover 2
4.4. For twin/triple combination
Refer to the outdoor unit installation manual.
RP35, 50 RP60-140
ø9.52 thickness 0.8 mm
ø15.88 thickness 1.0 mm
Flare nut O.D. Tightening torque
(mm)
17
22
22
26
29
29
36 100 - 120
36 100 - 120
RP60 RP71
ø6.35 –
ø9.52 ø9.52
– –
ø15.88 ø15.88
– –
P35, 50, 60, 71 P100, 125, 140
– –
ø9.52 ø9.52
– –
ø15.88 –
– ø19.05
E Pipe cover 3
F Press the pipe cover against the sheet metal.
G Refrigerant tubing heat insulating material
(N·m)
14 - 18
34 - 42
34 - 42
49 - 61
68 - 82
68 - 82
RP100, 125, 140
–
ø9.52
–
ø15.88
ø19.05
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