3P405106-10 English
7
Example of connection 1: When 1 indoor unit is connected downstream from the Branch Selector unit
To refrigerant branch
kit or outdoor unit
*
Suction gas pipe
<Upstream>
<Downstream>
Gas pipe
Indoor unit
Liquid pipe
High/low pressure
gas pipe
Liquid pipe
Determine using
Table 3 based
on the total capacity of the indoor
units connected downstream.
Select from
Table 4 depending
on the capacity type of the
indoor unit.
Branch
Selector
unit
Example of connection 2: When there is a branch downstream from the Branch Selector unit
Indoor unit
Indoor unit
Indoor unit
Gas pipe
Liquid pipe
Determine using
Table 3 based
on the total capacity of the indoor
units connected downstream.
For information on selecting the size of piping between
the refrigerant branch kits and between a refrigerant
branch kit and the indoor unit, refer to the installation
manual that came with the outdoor unit or Engineering
Data Book.
To refrigerant branch
kit or outdoor unit
Suction gas pipe
High/low pressure
gas pipe
Liquid pipe
Branch
Selector
unit
Refrigerant branch kit
<Upstream>
<Downstream>
Table 3 Indoor unit total capacity and pipe size
Total capacity index of
indoor units (x)
Pipe size (Outside diameter)
Upstream
Downstream
Suction
High/low pressure
Liquid
Gas pipe
Liquid pipe
in.
mm
in.
mm
in.
mm
in.
mm
in.
mm
x
<
54
f
5/8
f
15.9
f
1/2
f
12.7
f
3/8
f
9.5
f
5/8
f
15.9
f
3/8
f
9.5
54
≤
x
<
72
f
3/4
f
19.1
f
5/8
f
15.9
f
3/4
f
19.1
72
≤
x
≤
96
f
7/8
f
22.2
f
3/4
f
19.1
f
7/8
f
22.2
Table 4 Indoor unit connection pipe size
Capacity type of indoor
units
Pipe size (Outside diameter)
Gas pipe
Liquid pipe
in.
mm
in.
mm
07, 09, 12, 18
f
1/2
f
12.7
f
1/4
f
6.4
24, 30, 36, 42, 48, 54
f
5/8
f
15.9
f
3/8
f
9.5
72
f
3/4
f
19.1
96
f
7/8
f
22.2
* The Branch Selector unit downstream connection pipe sizes are shown below. If the pipe diameter differs
from that of the indoor unit connection pipe size selected from
Table 4, follow the instructions in “5-5
Piping connection” and use the included pipe to make the connection.
Table 5 Branch Selector unit connection pipe size
Branch Selector unit
Pipe size (Outer diameter)
Gas pipe
Liquid pipe
in.
mm
in.
mm
BSQ36TVJ
f
5/8
f
15.9
f
3/8
f
9.5
BSQ60TVJ
BSQ96TVJ
f
7/8
f
22.2
01_EN_3P405106-10.indb 7
4/21/2015 4:29:05 PM
