13
4.4
Selecting
Piping
Diameters
Tables
3
‐
4.4
to
3
‐
4.8,
below,
specify
the
required
pipe
diameters
for
the
indoor
and
outdoor
piping.
The
main
pipe
(L
1
)
and
first
indoor
branch
joint
(A)
should
be
sized
according
to
whichever
of
Tables
3
‐
4.4
and
3
‐
4.5
indicates
the
larger
size.
Figure
3
‐
4.3:
Selecting
piping
diameters
Table
3
‐
4.4:
Main
pipe
1
(L
1
),
indoor
main
pipes
(L
2
to
L
12
)
and
indoor
branch
joint
kits
Total
capacity
of
indoor
units
(kW)
Gas
pipe
(mm)
Liquid
pipe
(mm)
Branch
joint
kit
Capacity
<
16.6
Φ
15.9
Capacity
<
23
Φ
19.1
Φ
9.53
FQZHN
‐
01D
23
≤
Capacity
<
33
Φ
22.2
Φ
9.53
FQZHN
‐
02D
33
≤
Capacity
<
46
Φ
28.6
Φ
12.7
FQZHN
‐
03D
46
≤
Capacity
<
66
Φ
28.6
Φ
15.9
FQZHN
‐
03D
66
≤
Capacity
<
92
Φ
31.8
Φ
19.1
FQZHN
‐
03D
92
≤
Capacity
<
135
Φ
38.1
Φ
19.1
FQZHN
‐
04D
135
≤
Capacity
<
180
Φ
41.3
Φ
22.2
FQZHN
‐
05D
180
≤
Capacity
Φ44.5
Φ
25.4
FQZHN
‐
05D
Notes:
1.
The
main
pipe
(L
1
)
and
first
indoor
branch
joint
(A)
should
be
sized
according
to
whichever
of
Tables
3
‐
4.4
and
3
‐
4.5
indicates
the
larger
size.
N
1
(140)
N
4
(140)
N
7
(140)
N
8
(140)
N
10
(28)
N
12
(56)
N
11
(140)
N
3
(71)
N
6
(28)
N
13
(56)
A
B
G
H
K
I
L
C
E
L
1
L
2
L
3
L
5
L
7
L
8
L
11
L
12
L
9
a
c
d
f
g
h
j
l
m
k
M
N
g1
g2
g3
G
1
12HP
12HP
22HP
D
N
2
(140)
b
L
4
N
5
(140)
F
L
6
e
N
9
(71)
i
J
L
10
First
indoor
branch
joint
Alternative
outdoor
unit
arrangements
Main
pipe
M
g1
g2
M
N
O
G
2
G
1
Main
pipe
g1
g2
g3
g4
Legend
L
1
Main
pipe
Figures
in
parentheses
indicate
indoor
unit
capacity
indexes.
L
2
to
L
12
Indoor
main
pipes
a
to
m
Indoor
auxiliary
pipes
A to
L
Indoor
branch
joints
M
to
O
Outdoor
branch
joints
g
1
to
g
4
,
G
1
,
G
2
Outdoor
connection
pipes
Φ
9.53
FQZHN
‐
01D
16.6
≤
7
7
7
7
7
7
7
7
7
