Mitsubishi Electric City Multi PUMY-P200YKM2-ER Installation Manual page 7

4. Installing the refrigerant piping
A
A+a+b+c+d+e+f [ 150 m
A
L = A+f [ 80 m, ℓ = f [ 30 m
H [ 50 m (Outdoor lower H [ 40 m)
h [ 15 m
A
L
r
B
D
a b c d e
C C
C C C
Fig. 4-1
A
c1
D b1
B
H
a1*1
h1
a2 a3
C
C C
h3
Fig. 4-2
Total piping length
Farthest piping length (L)
Permissible
Piping length between outdoor unit and branch boxes
length
Farthest branch box from the first joint (b2)
(one-way)
Farthest piping length after branch box (r)
Total piping length between branch boxes and indoor units
In indoor/outdoor section (H)*1
Permissible
height
In branch box/indoor unit section (h1)
difference
In each branch unit (h2)
(one-way)
In each indoor unit (h3)
Number of bends
*1 Branch box should be placed within the level between the outdoor unit and indoor units.
A+B+C+D+a+b+c+d+e [ 150 m
L = A+B+C+D+e [ 80 m
ℓ = B+C+D+e [ 30 m
H [ 50 m (Outdoor lower H [ 40 m)
h [ 15 m
A
L
r
e
B C D
a b c d
B
C
C C C
C
A : Outdoor Unit
B : First Branch
C : Indoor unit
D : Cap
f
C
A Outdoor unit
B Branch box
C Indoor unit
D First joint
L
b2
B
h2
r
a5 a6 a7 a8
a4
C
C C
C
C
4.1.1. Connection without Branch box (Fig. 4-1)
A
Liquid pipe
L [ 60 m
L > 60 m
B, C, D
Total capacity of indoor units
16.0 kW
–
16.1 29.1 kW
–
L: The farthest piping length from the outdoor unit to an indoor unit.
a, b, c, d, e, f
Model number Liquid pipe
10, 15, 20, 25, 32,
40, 50
63, 80, 100, 125, 140
200
Branch kit model
CMY-Y62-G-E
4-Branching header
CMY-Y64-G-E
Note:
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.
4.1.2. 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.
c1 + b1 + b2 + a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 [ 150 m
c1 + b2 + a8 [ 80 m
c1 + b1 + b2 [ 55 m
b2 [ 30 m
a8 [ 25 m
a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 [ 95 m
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)
h1 + h2 [ 15 m
h2 [ 15 m
h3 [ 12 m
| 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
(mm)
Gas pipe
ø9.52 ø19.05
ø12.7 ø19.05
(mm)
Liquid pipe Gas pipe
ø9.52
L [ 60 m
ø15.88
L > 60 m ø12.7
ø9.52
L [ 60 m
ø19.05
L > 60 m ø12.7
(mm)
Gas pipe
ø6.35 ø12.7
ø9.52 ø15.88
ø9.52 ø19.05
8-Branching header
CMY-Y68-G-E
en
6