44
P5417009-rev.6
7
Diameter of Pipe Connected to Indoor Unit
(Two Pipes Portion)
The pipe diameter should be the same as the indoor
unit pipe connection size.
Indoor Unit
Capacity
(MBH)
Gas
*11
Liquid
6 - 15
1/2 (12.7)
1/4 (6.35)
*12
18 - 54
5/8 (15.88)
3/8 (9.52)
60 - 72
3/4 (19.05)
3/8 (9.52)
96
7/8 (22.2)
3/8 (9.52)
*11 For the exclusive use of cooling operation, connect
the low pressure gas pipe to the gas pipe of the
indoor unit.
*12 When liquid piping length is longer than 49ft (15m),
use 3/8inch (9.52mm) diameter pipe to connect to
the indoor unit (two pipes portion).
5
Diameter of Pipe between Change-Over Box and Multi-Kit
For Change-Over Box (Generation 1)
Change-Over Box
Model
Total Indoor Unit
Capacity (MBH)
Low Pressure
Gas
*7
High/Low Pressure
Gas
*7
COB048/096B21S
(Generation 1)
≤ 29
5/8
[5/8
(15.88)
(15.88)]
1/2
[1/2
(12.7)
(12.7)]
30 - 59
3/4
[7/8
(19.05)
(22.2)]
5/8
[3/4
(15.88)
(19.05)]
60 - 96
7/8
[1-1/8
(22.2)
(28.58)]
3/4
[7/8
(19.05)
(22.2)]
For Change-Over Box (Generation 2)
*8
Change-Over Box
Model
Total Indoor Unit
Capacity (MBH)
Low Pressure Gas
High/Low Pressure
Gas
Liquid
*9
COBS048/096B22S
COB04M132B22S
COB08/12M264B22S
(Generation 2)
≤ 47
5/8 (15.88)
1/2 (12.7)
3/8 (9.52)
48 - 71
3/4 (19.05)
5/8 (15.88)
3/8 (9.52)
72 - 95
7/8 (22.2)
3/4 (19.05)
3/8 (9.52)
96 - 119
7/8 (22.2)
3/4 (19.05)
1/2 (12.7)
120 - 143
1-1/8 (28.58)
7/8 (22.2)
1/2 (12.7)
144 - 215
1-1/8 (28.58)
7/8 (22.2)
5/8 (15.88)
216 - 264
1-3/8 (34.93)
1-1/8 (28.58)
3/4 (19.05)
*7 If the number of connected indoor unit exceeds four, the low pressure gas and high/low pressure gas pipes need to
change size in square bracket. In addition, the gas and liquid pipes of
6
“Diameter of Pipe (Two Pipes Portion)” and
7
“Diameter of Pipe Connected to Indoor Unit (Two Pipes Portion)” need to increase one size respectively. In this
case, prepare a field-supplied reducer.
*8 If the size of
5
“Diameter of Pipe between Change-Over Box and Multi-Kit” is larger than the size of
3
“Main Pipe
Diameter”, adjust the size of
5
“Diameter of Pipe between Change-Over Box and Multi-Kit” to the same size as
3
“Main Pipe Diameter”
*9 Change-Over Box (COBS048/096B22S) is not connected to liquid pipe.
6
Diameter of Pipe (Two Pipes Portion)
Total Indoor Unit
Capacity
(MBH)
Gas
*10
Liquid
< 47
5/8 (15.88)
3/8 (9.52)
48 - 71
3/4 (19.05)
3/8 (9.52)
72 - 95
7/8 (22.2)
3/8 (9.52)
96 - 119
7/8 (22.2)
1/2 (12.7)
120 - 143
1-1/8 (28.58)
1/2 (12.7)
144 - 215
1-1/8 (28.58)
5/8 (15.88)
216 - 299
1-3/8 (34.93)
3/4 (19.05)
> 300
1-5/8 (41.28)
3/4 (19.05)
*10 For the exclusive use of cooling operation, connect
the low pressure gas pipe to the gas pipe of line
branch or header branch for two pipes portion.
inch (mm)
inch (mm)
inch (mm)
inch (mm)
Содержание YVAHR072B32S
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