Refrigerant Pipe And Drain Pipe - Mitsubishi Electric CITY MULTI PKFY-P-VAM-E Serie Manual De Instalación

3. Installing the indoor unit
2-2
A
B
C
Fig. 3-6
A
Fig. 3-8

4. Refrigerant pipe and drain pipe

A
45°±2°
Fig. 4-1
B Refrigerant pipe sizes & Flare nut tightening torque
Liquid pipe
Tightening
Pipe size
torque
(mm)
(N.m)
P20/25/32/40 ODø6.35 (1/4") 14 - 18
P50 ODø9.52 (3/8") 34 - 42*
P63/80 ODø9.52 (3/8") 34 - 42
ODø9.52 (3/8") 34 - 42
P100/125
* 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
L
1
Fig. 3-7
C
C
B
B
C
B
R407C or R22
Gas pipe
Tightening
Pipe size
torque
(mm)
(N.m)
ODø12.7 (1/2") 49 - 61
ODø15.88 (5/8") 68 - 82*
ODø15.88 (5/8") 68 - 82
ODø19.05 (3/4") 100 - 120*
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)
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.
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. Flare dimensions
(mm) øA dimensions (mm)
ø6.35
ø9.52
ø12.7
ø15.88
ø19.05
R410A
Liquid pipe
Tightening
Pipe size Pipe size
torque
(mm) (mm)
(N.m)
ODø6.35 (1/4") 14 - 18 ODø12.7 (1/2")
ODø6.35 (1/4") 34 - 42 ODø12.7 (1/2")
ODø9.52 (3/8") 34 - 42 ODø15.88 (5/8")
ODø9.52 (3/8") 34 - 42 ODø15.88 (5/8")
C Apply refrigerating machine oil over the entire flare seat surface.
8.7 - 9.1
12.8 - 13.2
16.2 - 16.6
19.3 - 19.7
22.9 - 23.3
Flare nut O.D.
Gas pipe
Tightening
Liquid Gas
torque
pipe pipe
(N.m) (mm) (mm)
49 - 61 17
68 - 82 22
68 - 82 22
100 - 120
22
26
29
29
36