Mitsubishi Electric PUMY-P112VKM [7/39] Installing the refrigerant piping

Mitsubishi Electric PUMY-P112VKM [7/39] Installing the refrigerant piping
7
A (mm)
È Liquid pipe É Gas pipe
PUMY-P112-140 ø9.52 ø15.88
B, C, D (mm)
Ê Total capacity of indoor units È Liquid pipe É Gas pipe
ø9.52 ø15.88
a, b, c, d, e, f (mm)
Ë Model number È Liquid pipe É Gas pipe
15, 20, 25, 32, 40, 50 ø6.35 ø12.7
63, 80, 100, 125, 140 ø9.52 ø15.88
Ì Branch kit model
CMY-Y62-G-E
Í 4-Branching header Î 8-Branching header
CMY-Y64-G-E CMY-Y68-G-E
* When connecting the CONNECTION KIT (PAC-LV11M-J) and an M-series indoor
unit, refer to the installation manual for the CONNECTION KIT when selecting the
pipe size and piping length.
4. Installing the refrigerant piping
A
H
B C
L
D
e
a
h
b c d
A
a
b
c d e f
H
h
L
A : Outdoor Unit
B : First Branch
C : Indoor unit
D : Cap
A+B+C+D+a+b+c+d+e 300 m
L = A+B+C+D+e 150 m
ℓ = B+C+D+e 30 m
H 50 m (Outdoor lower H 40 m)
h 15 m
A+a+b+c+d+e+f 300 m
L = A+f 150 m, ℓ = f 30 m
H 50 m (Outdoor lower H 40 m)
h 15 m
Fig. 4-1
4.2.2. Connection with Branch Box (Fig. 4-2)
Flared connections
This unit has flared connections on each indoor unit and branch box and outdoor
unit sides.
Remove the valve cover of the outdoor unit, then connect the pipe.
Refrigerant pipes are used to connect the branch box and outdoor unit.
Fig. 4-2
L
I
h2
b2
b1
c1
a6a5
a4a3a2
h3
h1
H
a1
a7 a8
Outdoor unit
Branch box
Indoor unit
Permissible
length
(one-way)
Total piping length
c1 + b1 + b2 + a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 150 m
Farthest piping length (L)
c1 + b2 + a8 80 m (b2 55 m, a8 25 m)
Piping length between outdoor unit and branch boxes
c1 + b1 + b2 55 m
Farthest branch box from the first joint (b2)
b2 30 m
Farthest piping length after branch box (l)
a8 25 m
Total piping length between branch boxes and indoor units
a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 95 m
Permissible
height differ-
ence
(one-way)
In indoor/outdoor section (H)*1
H 50 m (In case of outdoor unit is set higher than indoor unit)
H 40 m (In case of outdoor unit is set lower than indoor unit)
In branch box/indoor unit section (h1)
h1 + h2 15 m
In each branch unit (h2)
h2 15 m
In each indoor unit (h3)
h3 12 m
Number of bends
| c1 + b1 + a1 |, | c1 + b1 + a2 |, | c1 + b1 + a3 |, | c1 + b1 + a4 |, | c1 + b1 + a5 |, | c1 + b2 + a6 |,
| c1 + b2 + a7 |, | c1 + b2 + a8 | 15
*1 Branch box should be placed within the level between the outdoor unit and indoor units.
*1
4.2. Pipe length and height difference
4.2.1. Connection without Branch Box (Fig. 4-1)

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