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  1. Handleidingen
  2. Merken
  3. Mitsubishi Electric Handleidingen
  4. Airconditioners
  5. Mr.SLIM PCA-RP KA Series
  6. Installatiehandleiding

Installing The Refrigerant Piping; Precautions - Mitsubishi Electric Mr.SLIM PCA-RP KA Series Installatiehandleiding

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4. Installing the refrigerant piping

45 2
Flare cutting dimensions
Copper pipe O.D.
Flare dimensions
(mm)
A dimensions (mm)
6.35
9.52
12.7
15.88
19.05
Copper pipe O.D.
Flare tool for R410A
(mm)
6.35 (1/4")
9.52 (3/8")
12.7 (1/2")
15.88 (5/8")
19.05 (3/4")
Fig. 4-3
Fig. 4-1
8.7 - 9.1
12.8 - 13.2
16.2 - 16.6
19.3 - 19.7
23.6 - 24.0
B
Die
Copper pipe
Fig. 4-2
B (mm)
Clutch type
0 - 0.5
0 - 0.5
0 - 0.5
0 - 0.5
0 - 0.5

4.1. Precautions

For devices that use R410A refrigerant
• Use ester oil, ether oil or alkylbenzene oil (small amount) as the refrigera-
tion oil applied to the fl ared sections.
• Use C1220 copper phosphorus for copper and copper alloy seamless
pipes, to connect the refrigerant pipes. Use refrigerant pipes with the thick-
nesses specifi ed in the table 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 specifi ed refriger-
ant (R410A) to charge the refrigerant lines. Do not mix it with any other refrig-
erant 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.
RP35, 50
[ 6.35 thickness 0.8 mm
Liquid pipe
[ 12.7 thickness 0.8 mm
Gas pipe
• Do not use pipes thinner than those specifi ed 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 in-
sulation materials (specifi c gravity of 0.03, thickness of 9 mm or more).
• Apply thin layer of refrigerant oil to pipe and joint seating surface before tighten-
ing fl are nut.
• Use 2 wrenches to tighten piping connections.
• Use refrigerant piping insulation provided to insulate indoor unit connections. In-
sulate carefully.
B Flare nut tightening torque
Copper pipe O.D.
Flare nut O.D.
(mm)
[6.35
[6.35
[9.52
[12.7
[12.7
[15.88
[15.88
[19.05
C Apply refrigerating machine oil over the entire fl are seat surface.
D Use correct fl are nuts meeting the pipe size of the outdoor unit.
Available pipe size
RP35, 50
[6.35 Ο
Liquid side
—
[12.7 Ο
Gas side
Ο : Factory fl are 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
the sheet metal inside the unit.
3. Tighten the pipe covers 2 and 3 at the both ends (20 mm) with the supplied
bands 4.
A Gas tubing
E Pipe cover 3
B Liquid tubing
F Press the pipe cover against the sheet metal.
C Band 4
G Refrigerant tubing heat insulating material
D Pipe cover 2
4.4. For twin/triple combination
Refer to the outdoor unit installation manual.
RP60-140
[ 9.52 thickness 0.8 mm
[ 15.88 thickness 1.0 mm
Tightening torque
(mm)
(N·m)
17
14-18
22
34-42
22
34-42
26
49-61
29
68-82
29
68-82
36
100-120
36
100-120
RP60
RP71-140
[6.35
—
[9.52 Ο
[9.52 Ο
[15.88 Ο
[15.88 Ο
5

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Mr.slim pca-rp50 kaMr.slim pca-rp60 kaMr.slim pca-rp71 kaMr.slim pca-rp100 kaMr.slim pca-rp125 kaMr.slim pca-rp140 ka

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