Mitsubishi Electric PUMY-HP36NKMU1, Installation Manual, Page: 7 / 20

6
4. Installing the refrigerant piping
4.2. Pipe length and height difference (Fig. 4-1)
B
A
H
B C
L
r
D
e
a
h
b c d
C
C
A
C C C
B
A
A
a b c d
C
D
e f
H
h
L
r
C C
C C C
A, B, C, D (mm [inch])
Liquid pipe Gas pipe
PUMY-P36/48
ø9.52 [3/8]
ø15.88 [5/8]
PUMY-HP36/48
PUMY-P60 ø19.05 [3/4]
a, b, c, d, e, f (mm [inch])
Model number Liquid pipe Gas pipe
04, 05, 06, 08, 12, 15, 18 ø6.35 [1/4] ø12.7 [1/2]
24, 27, 30, 36, 48, 54 ø9.52 [3/8] ø15.88 [5/8]
72 ø9.52 [3/8] ø19.05 [3/4]
Branch kit model
CMY-Y62-G-E
4-Branching header 8-Branching header
CMY-Y64-G-E CMY-Y68-G-E
Piping preparation
1
Table below shows the specifications of pipes commercially available.
Outside diameter Insulation thickness
Insulation material
mm (inch) mm (inch)
6.35 (1/4) 8 (5/16)
Heat resisting foam plastic 0.045
specific gravity
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:
Be sure to use the insulation of specified thickness. Excessive thickness may
cause incorrect installation of the indoor unit and lack of 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.
A
Outdoor Unit
B
First Branch
C
Indoor unit
D
Cap
A
Outdoor Unit
B
First Branch
C
Indoor unit
Fig. 4-1
Conversion formula
1/4 F ø6.35 (1/4)
3/8 F ø9.52 (3/8)
1/2 F ø12.7 (1/2)
5/8 F ø15.88 (5/8)
3/4 F ø19.05 (3/4)
P36/48
HP36/48
P60
A+B+C+D+a+b+c+d+e
[
300 m [984 ft]
[
150 m [492 ft]
L = A+B+C+D+e
[
150 m [492 ft]
[
80 m [262 ft]
R
= B+C+D+e
[
30 m [98 ft]
H Outdoor higher
[
50 m [164 ft]
Outdoor lower
[
40 m [131 ft]*
[
40 m [131 ft]
h
[
15 m [49 ft]
* When PKFY-P06NBMU, PKFY-P08NHMU, PKFY-P04/06/08/12NLMU, PFFY-
P06/08/12NEMU, or PFFY-P06/08/12NRMU is included, use within 30 m [98 ft].
P36/48
HP36/48
P60
A+a+b+c+d+e+f
[
300 m [984 ft]
[
150 m [492 ft]
L = A+f
[
150 m [492 ft]
[
80 m [262 ft]
R
= f
[
30 m [98 ft]
H Outdoor higher
[
50 m [164 ft]
Outdoor lower
[
40 m [131 ft]*
[
40 m [131 ft]
h
[
15 m [49 ft]
* When PKFY-P06NBMU, PKFY-P08NHMU, PFFY-P06/08/12NEMU, or PFFY-
P06/08/12NRMU is included, use within 30 m [98 ft].
en
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