Mitsubishi Electric PUMY-P36 Manuel D'installation page 7

4. Installing the refrigerant piping
4.2. Pipe length and height difference (Fig. 4-1)
A
A
L
r
B C D
B
a b c d
C
C C C
A+B+C+D+a+b+c+d+e
L = A+B+C+D+e
R = B+C+D+e
Outdoor higher
Outdoor lower
h
A
A
L
B
D
a b c d e
C C
C C C
A+a+b+c+d+e+f
L = A+f
R = f
Outdoor higher
Outdoor lower
h
Fig. 4-1
A
B First Branch
e
C Indoor unit
C
P36/48
P60
300 m [984 ft] 150 m [492 ft]
150 m [492 ft] 80 m [262 ft]
30 m [98 ft]
50 m [164 ft]
40 m [131 ft]* 40 m [131 ft]
15 m [49 ft]
A
r
B First Branch
C Indoor unit
D Cap
f
C
P36/48
P60
300 m [984 ft] 150 m [492 ft]
150 m [492 ft] 80 m [262 ft]
30 m [98 ft]
50 m [164 ft]
40 m [131 ft]
40 m [131 ft]*
15 m [49 ft]
Conversion formula
1/4 F
3/8 F
1/2 F
5/8 F
3/4 F
A, B, C, D
Liquid pipe
a, b, c, d, e, f
Model number Liquid pipe
05, 06, 08, 12, 15, 18
24, 27, 30, 36, 48, 54
72
Branch kit model
CMY-Y62-G-E
4-Branching header
CMY-Y64-G-E
Piping preparation
1
Outside diameter Insulation thickness
mm (inch) mm (inch)
6.35 (1/4) 8 (5/16)
9.52 (3/8) 8 (5/16)
12.7 (1/2) 8 (5/16)
15.88 (5/8) 8 (5/16)
19.05 (3/4) 8 (5/16)
2 Ensure that the 2 refrigerant pipes are insulated to prevent condensation.
3 Refrigerant pipe bending radius must be 4" (100 mm) or more.
Caution
thickness may cause dew drippage.
Warning:
When pumping down the refrigerant, stop the compressor before disconnect-
ing the refrigerant pipes. The compressor may burst and cause injury if any
foreign substance, such as air, enters the system.
(mm [inch])
Gas pipe
[5/8]
[3/8]
[3/4]
(mm [inch])
Gas pipe
[1/4] [1/2]
[3/8] [5/8]
[3/8] [3/4]
8-Branching header
CMY-Y68-G-E
Insulation material
7