Refrigerant Pipe; Positioning Refrigerant And Drain Piping - Mitsubishi Electric CITY MULTI PKFY-P63VFM-E Installationshandbuch

4. Refrigerant pipe

A
45°±2°
Fig. 4-1
B Refrigerant pipe sizes & Flare nut tightening torque
Liquid pipe
Tightening
Pipe size
(mm)
P20/25/32/40 ODø6.35 (1/4")
ODø9.52 (3/8")
P50
P63/80 ODø9.52 (3/8")
P100/125 ODø9.52 (3/8")
* Use the provided flare nut for the following pipes: Liquid pipe of P50, gas pipe of P50, P100, and P125.
1
E
25 B
Fig. 4-2
2
F G
30
37
74
Fig. 4-3
3
J
M
Fig. 4-4
Gas pipe
Thermal insulating
material for liquid pipe
Thermal insulating
refrigerant piping
Fig. 4-5
B
C
B
R407C or R22
Gas pipe
Tightening
Pipe size
torque torque
(mm)
(N.m) (N.m)
14 - 18 ODø12.7 (1/2") 49 - 61
34 - 42* ODø15.88 (5/8") 68 - 82*
34 - 42 ODø15.88 (5/8") 68 - 82
34 - 42 ODø19.05 (3/4") 100 - 120*
C
D
D
55
B
120
1110 183 C
B
H I
30
39
98 32
37
74
340
L
Liquid pipe
Band (large) 4
Insulation material 3
Band (small) 4
Band (small) 4
material for
Liquid pipe
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
R410A
Liquid pipe
Tightening
Pipe size
torque
(mm)
(N.m)
ODø6.35 (1/4") 14 - 18
ODø6.35 (1/4") 34 - 42
ODø9.52 (3/8") 34 - 42
ODø9.52 (3/8") 34 - 42
C Apply refrigerating machine oil over the entire flare seat surface.

4.2. Positioning refrigerant and drain piping

1 Position of refrigerant and drain piping (Fig. 4-2)
2 Determine the position of the knockout holes on the unit body (Fig. 4-3)
A
• Make the knockout holes using a saw blade or an adequate knife.
111
Caution:
The side panel must be removed before drilling a knockout hole in it.
If a hole is made with the side panel in place, the refrigerant pipe within the unit
could be damaged.
3 L-shaped connection pipe (for gas piping) (Fig. 4-4)
A 107 mm (P63), 102 mm (P100)
B Drain hose
C Liquid pipe
D Gas pipe
E Drain hose in left-side piping
F Knockout holes on the unit body
G For left-side piping
K
J
4.3. Refrigerant piping (Fig. 4-5)
1) Indoor unit
Caution:
Before connecting right, lower, left or left rear piping, connect the supplied L-
shaped connection pipe B to the on-site piping.
Tape
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
Gas pipe
Tightening Liquid
Pipe size
torque
pipe
(mm)
(N.m) (mm)
ODø12.7 (1/2") 49 - 61 17
ODø12.7 (1/2") 68 - 82
22
ODø15.88 (5/8") 68 - 82 22
ODø15.88 (5/8") 100 - 120 22
H For lower-side piping
I For right-side piping
J L-shaped connection pipe (option)
K Unit side
L On-site piping side
M Piping
Flare nut O.D.
Gas
pipe
(mm)
26
29
29
36
5