7
en
B
A
H
B
C
L
r
D
e
a
h
b
c
d
C
C
B
A
A
A
a
b
c
d
C
D
e
f
H
h
L
r
C
C
C
C
C
C
C
C
A
(mm)
Liquid pipe
Gas pipe
ø9.52
ø15.88
B, C, D
(mm)
Liquid pipe
Gas pipe
ø9.52
ø15.88
a, b, c, d, e, f
(mm)
Model number
Liquid pipe
Gas pipe
10, 15, 20, 25, 32,
40, 50
ø6.35
ø12.7
63, 80, 100, 125, 140
ø9.52
ø15.88
Branch kit model
CMY-Y62-G-E
4-Branching header
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
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
* When PKFY-P·VBM/PKFY-P10 – 32VLM/PFFY-P·VKM/PFFY-
P·VCM/PFFY-P·VL
✽
type indoor unit is included, use 30 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
* When PKFY-P·VBM/PKFY-P10 – 32VLM/PFFY-P·VKM/PFFY-
P·VCM/PFFY-P·VL
✽
type indoor unit is included, use 30 m.
Fig. 4-1
4.2.2. Connection with Branch Box (Fig. 4-2)
• 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
B
C
B
C
C
C
C
C
C
C
L
r
h2
b2
b1
c1
a6
a5
a4
a3
a2
h3
h1
H
a1
a7 a8
D
A
A
Outdoor unit
B
Branch box
C
Indoor unit
D
First joint
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
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 (
r
)
a8
[
25 m
Total piping length between branch boxes and indoor units
a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8
[
95 m
Permissible
height
difference
(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.
4.2. Pipe length and height difference
4.2.1. Connection without Branch Box (Fig. 4-1)
BH79D826H05.indb 7
2020/04/27 9:36:57
009
