Mitsubishi Electric PUMY-P100 YHMB Manuel D'installation page 7

4. Installing the refrigerant piping
A
B
A+a+b+c+d+e+f = 120 m
= 80 m, R= f =
L = A+f
H = 50 m (Outdoor lower H
h = 12 m
A
L
r
B
D
a b c d e
C C
C C C
Fig. 4-1
A
45°±2°
A Flare cutting dimensions
B Flare nut tightening torque
Fig. 4-2
A (Fig. 4-2)
Copper pipe O.D. Flare dimensions
(mm) øA dimensions (mm)
ø6.35 8.7 - 9.1
ø9.52 12.8 - 13.2
ø12.7 16.2 - 16.6
ø15.88 19.3 - 19.7
B (Fig. 4-2)
Copper pipe O.D. Flare nut O.D.
(mm) (mm)
ø6.35
ø6.35
ø9.52
ø12.7
ø12.7
ø15.88
ø15.88
A
B
Fig. 4-3
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A+B+C+D+a+b+c+d+e = 120 m
L = A+B+C+D+e = 80 m
R= B+C+D+e
= 30 m
H = 50 m (Outdoor lower H = 20 m)
h = 12 m
L
r
e
B C D
a b c d
C
C C C
C
30 m
= 20 m)
A : Outdoor Unit
B : First Branch
C : Indoor unit
D : Cap
f
C
B
C
D
Tightening torque
(N·m)
17 14 - 18
22 34 - 42
22 34 - 42
26 49 - 61
29 68 - 82
29 68 - 82
36 100 - 120
A
A Die
B Copper pipe
A
Å Liquid pipe
PUMY-P100-140 ø9.52
B, C, D
Ç Total capacity of indoor units Å Liquid pipe
a, b, c, d, e, f
Î Model number Å Liquid pipe
15, 20, 25, 32, 40, 50 ø6.35
63, 80, 100, 125, 140 ø9.52
‰ Branch kit model
CMY-Y62-G-E
Ï 4-Branching header
CMY-Y64-G-E
4.2. Connecting pipes (Fig. 4-2)
Fig. 4-1 is a sample of piping system.
• 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. A
• Use two wrenches to tighten piping connections. B
• Use leak detector or soapy water to check for gas leaks after connections are com-
pleted.
• Apply refrigerating machine oil over the entire flare seat surface. C
• Use the flare nuts for the following pipe size. D
Gas side Pipe size (mm)
Liquid side Pipe size (mm)
• When bending the pipes, be careful not to break them. Bend radius of 100 mm to
150 mm is sufficient.
• Make sure the pipes do not contact the compressor. Abnormal noise or vibration
may result.
1 Pipes must be connected starting from the indoor unit.
Flare nuts must be tightened with a torque wrench.
2 Flare the liquid pipes and gas pipes and apply a thin layer of refrigeration oil
(Applied on site).
• When usual pipe sealing is used, refer to Table 3 for flaring of R410A refrigerant
pipes.
The size adjustment gauge can be used to confirm A measurements.
Table 3 (Fig. 4-3)
Copper pipe O.D.
Flare tool for R410A
(mm)
ø6.35 (1/4") 0 - 0.5
ø9.52 (3/8") 0 - 0.5
ø12.7 (1/2") 0 - 0.5
ø15.88 (5/8") 0 - 0.5
ø19.05 (3/4") 0 - 0.5
(mm)
ı Gas pipe
ø15.88
(mm)
ı Gas pipe
ø9.52 ø15.88
(mm)
ı Gas pipe
ø12.7
ø15.88
Ì 8-Branching header
CMY-Y68-G-E
Indoor unit Outdoor unit
15-50 63-140 100-140
ø12.7 ø15.88 ø15.88
ø6.35 ø9.52 ø9.52
A (mm)
Flare tool for R22·R407C
Clutch type
1.0 - 1.5
1.0 - 1.5
1.0 - 1.5
1.0 - 1.5
1.0 - 1.5
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