10
GB
4. Installing the refrigerant piping
A
B
e1
d2
L2
d1
b1
c1
c2
b2
H
h3
h1
C
D
a1
a2
a3
a4
a5
a6
a7
a8
E
E
E
E
E
F
F
F
F
F
L1
A
Outdoor Unit
B
First joint (CMY, MSDD)
C
Branch header (CMY)
D
Branch box (PAC-MK∙BC(B))
E
CityMulti Indoor unit
F
M/S/P series Indoor unit
Permissible
length (One-way)
Total piping length
e1 + d1 + d2 + c1 + c2 + b1 + b2 + a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8
[
120 m
Farthest piping length (L1)
e1 + d2 + a1 or e1 + d1 + c1 + b2
[
70 m
Farthest piping length. Via Branch box (L2)
e1 + d1 + c1 + b1 + a8
[
80 m
Piping length between outdoor unit and branch box
e1 + d1 + c1 + b1
[
55 m
Farthest piping length from the first joint
d1 + c1 + b1 or d2 + a1
[
50 m
Farthest piping length after branch box
a8
[
25 m
Total piping length between branch boxes and indoor units
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
[
30 m (In case of outdoor unit is set lower than indoor unit)
In branch box/indoor unit section (h1)
h1
[
15 m
In each indoor unit (h3)
h3
[
12 m
Number of bends
|e1 + d2 + a1|, |e1 + d2 + a2|, |e1 + d2 + a3|, |e1 + d1 + c2|, |e1 + d1 + c1 + b2|,
|e1 + d1 + c1 + b1 + a4|, |e1 + d1 + c1 + b1 + a5|, |e1 + d1 + c1 + b1 + a6|,
|e1 + d1 + c1 + b1 + a7|, |e1 + d1 + c1 + b1 + a8|
[
15
*1: Branch box should be placed within the level between the outdoor unit and indoor units.
4.1.3-2 In case of using 2-branch boxes
A
B
d1
c1
L2
L1
c2
b2
b1
h1
h2
H
h3
C
D
D
a1
a2
a3
a4
a5
a6
a7
a8
a9
a10 a11
E
E
E
F
F
F
F
F
F
F
F
A
Outdoor Unit
B
First joint (CMY, MSDD)
C
Branch header (CMY)
D
Branch box (PAC-MK∙BC(B))
E
CityMulti Indoor unit
F
M/S/P series Indoor unit
Permissible
length (One-way)
Total piping length
d1 + c1 + c2 + b1 + b2 + a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 + a9 + a10 + a11
[
120 m
Farthest piping length (L1)
d1 + c1 + a1
[
70 m
Farthest piping length. Via Branch box (L2)
d1 + c2 + b2 + a11
[
80 m
Piping length between outdoor unit and branch boxes
d1 + c2 + b1 + b2
[
55 m
Farthest piping length from the first joint
c2 + b2 or c1 + a1
[
50 m
Farthest piping length after branch box
a11
[
25 m
Farthest branch box from outdoor unit
d1 + c2 + b2
[
55 m
Total piping length between branch boxes and indoor units a4 + a5 + a6 + a7 + a8 + a9 + a10 + a11
[
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
[
30 m (In case of outdoor unit is set lower than indoor unit)
In branch box/indoor unit section (h1+h2)
h1 + h2
[
15 m
In each branch unit (h1)
h2
[
15 m
In each indoor unit (h3)
h3
[
12 m
Number of bends
|d1 + c1 + a1|, |d1 + c1 + a2|, |d1 + c1 + a3|, |d1 + c2 + b1 + a4|, |d1 + c2 + b1 + a5|, |d1 + c2 + b1
+ a6|, |d1 + c2 + b1 + a7|, |d1 + c2 + b1 + a8|, |d1 + c2 + b2 + a9|, |d1 + c2 + b2 + a10|, |d1 + c2
+ b2 + a11|
[
15
*1: Branch box should be placed within the level between the outdoor unit and indoor units.
4.1.3. Mixed system (City Multi indoor units and M/S/P series indoor units via Branch box)
4.1.3-1 In case of using 1-branch box
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12/28/2017 11:24:53 AM