Installing The Refrigerant Piping - Mitsubishi Electric PUMY-P36NKMU3 Installation Manual

4. Installing the refrigerant piping

4.2. Pipe length and height difference (Fig. 4-1)
A
A
L
r
B C D
a b c d
B
C
C C C
A+B+C+D+a+b+c+d+e
L = A+B+C+D+e
R = B+C+D+e
H Outdoor higher
Outdoor lower
h
* 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].
A
A
L
B
D
b
a c d e
C C
C C C
A+a+b+c+d+e+f
L = A+f
R = f
H Outdoor higher
Outdoor lower
h
* When PKFY-P06NBMU, PKFY-P08NHMU, PFFY-P06/08/12NEMU, or PFFY-
P06/08/12NRMU is included, use within 30 m [98 ft].
Fig. 4-1
A Outdoor Unit
B First Branch
e
C Indoor unit
C
P36/48
P60
HP36/48
[ 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 Outdoor Unit
B First Branch
r
C Indoor unit
D Cap
f
C
P36/48
P60
HP36/48
[ 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 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)
A, B, C, D
Liquid pipe
PUMY-P36/48
PUMY-HP36/48 ø9.52 [3/8]
PUMY-P60
a, b, c, d, e, f
Model number Liquid pipe
04, 05, 06, 08, 12, 15, 18 ø6.35 [1/4]
24, 27, 30, 36, 48, 54 ø9.52 [3/8]
72 ø9.52 [3/8]
Branch kit model
CMY-Y62-G-E
4-Branching header
CMY-Y64-G-E
Piping preparation
1 Table below shows the specifications of pipes commercially available.
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:
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.
(mm [inch])
Gas pipe
ø15.88 [5/8]
ø19.05 [3/4]
(mm [inch])
Gas pipe
ø12.7 [1/2]
ø15.88 [5/8]
ø19.05 [3/4]
8-Branching header
CMY-Y68-G-E
Insulation material
Heat resisting foam plastic 0.045
specific gravity
6
en