Refrigerant Pipe And Drain Pipe - Mitsubishi Electric CITY MULTI PKFY-P-VAM-E-Serie Installationshandbuch

3. Installing the indoor unit
2-2
C
Fig. 3-6

4. Refrigerant pipe and drain pipe

A
B Refrigerant pipe sizes & Flare nut tightening torque
Pipe size
ODø6.35 (1/4")
P20/25/32/40
ODø9.52 (3/8")
P50
ODø9.52 (3/8")
P63/80
P100/125 ODø9.52 (3/8")
* Use the provided flare nut for the following pipes: Liquid pipe of P50, P100, P125, and gas pipe of P50.
4
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3
A
B
L
1
Fig. 3-7
C
A
Fig. 3-8
B
45°±2°
C
B
Fig. 4-1
R407C or R22
Liquid pipe Gas pipe
Tightening
Pipe size
torque
(mm) (mm)
(N.m)
14 - 18 ODø12.7 (1/2")
34 - 42* ODø15.88 (5/8")
34 - 42 ODø15.88 (5/8")
34 - 42 ODø19.05 (3/4")
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2-2 Lift the indoor unit by hooking the supporting piece (attached to the mount
board) to the ribs on the back of the unit as shown. (Fig. 3-6)
When piping work etc. is complete, replace the supporting piece on the mount
board.
(If the unit is not fixed securely, vibration may occur during operation.)
A Mount board
B Supporting piece
C Rib
3 If the flare pipe is to be embedded into the wall in advance: (Fig. 3-7)
• Determine the length of pipe to be embedded by marking on the mounting plate
as a reference.
L Mark
1 Wall mounting fixture
3.3. Mounting the unit (Fig. 3-8)
C
1 Securely place the hanging fixtures for the indoor unit over the catches on the wall
mounting fixture.
A Indoor unit
B Wall mounting fixture
C Catch
2 When piping has been completed, install the indoor unit and wall mounting fixture
with fixing screws.
B
4.1. 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.
• Use two wrenches to tighten piping connections.
• Use refrigerant piping insulation provided to insulate indoor unit connections. Insu-
late carefully.
A Flare cutting dimensions
Copper pipe O.D.
(mm)
ø6.35
ø9.52
ø12.7
ø15.88
ø19.05
Liquid pipe
Tightening
Pipe size
torque
(mm)
(N.m)
49 - 61 ODø6.35 (1/4")
68 - 82* ODø6.35 (1/4")
68 - 82 ODø9.52 (3/8")
100 - 120* ODø9.52 (3/8")
C Apply refrigerating machine oil over the entire flare seat surface.
Flare dimensions
øA dimensions (mm)
8.7 - 9.1
12.8 - 13.2
16.2 - 16.6
19.3 - 19.7
22.9 - 23.3
R410A
Gas pipe
Tightening Tightening
Pipe size
torque torque
(mm)
(N.m) (N.m)
14 - 18 ODø12.7 (1/2") 49 - 61
34 - 42 ODø12.7 (1/2") 68 - 82
34 - 42 ODø15.88 (5/8") 68 - 82
34 - 42 ODø15.88 (5/8") 100 - 120
Flare nut O.D.
Liquid Gas
pipe pipe
(mm) (mm)
17 26
22 29
22 29
22 36