Table 3 Total indoor unit capacity and pipe size
Total indoor unit capacity
(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 f5/8 f15.9 f1/2 f12.7
f3/8 f9.5
f5/8 f15.9
f3/8 f9.5
54 ≤ x < 72 f3/4 f19.1 f5/8 f15.9 f3/4 f19.1
72 ≤ x < 111 f7/8 f22.2
f3/4 f19.1
f7/8 f22.2
111 ≤ x < 162
f1-1/8 f28.6
f1/2 f12.7
162 ≤ x < 230
f1-1/8 f28.6
f5/8 f15.9
230 ≤ x ≤ 290 f1-3/8 f34.9 f3/4 f19.1
• In case of connection to the main pipe, refer to the installation manual included with the outdoor unit or
the equipment design materials.
Table 4 Indoor unit connection pipe size
Indoor unit capacity size
Pipe size (Outside diameter)
Gas pipe Liquid pipe
in. mm in. mm
07, 09, 12, 18 f1/2 f12.7 f1/4 f6.4
24, 30, 36, 42, 48, 54 f5/8 f15.9
f3/8 f9.5
72 f3/4 f19.1
96 f7/8 f22.2
• Table 5 lists Branch Selector unit connection pipe size.
Table 5 Branch Selector unit connection pipe size
Outdoor unit side (*1)
Branch Selector unit
Suction pipe High/low pressure gas pipe Liquid pipe
in. mm in. mm in. mm
BS4Q54TVJ
f7/8 f22.2
f3/4 f19.1
f3/8 f9.5
BS6Q54TVJ
f1-1/8
f28.6
f1/2 f12.7
BS8Q54TVJ
BS10Q54TVJ
f1-1/8 f28.6 f5/8 f15.9
BS12Q54TVJ
Indoor unit side (*2)
Branch Selector unit
Gas pipe Liquid pipe
in. mm in. mm
BS4Q54TVJ
f1/2 (f5/8) f12.7 (f15.9) f1/4 (f3/8) f6.4 (f9.5)
BS6Q54TVJ
BS8Q54TVJ
BS10Q54TVJ
BS12Q54TVJ
*1 If the pipe size differs from that of the size selected from Table 3, you will need a reducing joint (to be
supplied in the eld).
*2 The pipe diameter in parentheses can be used by cutting the pipes on the Branch Selector unit side
with a pipe cutter. For details, refer to “5-3 Piping connection.”
7
3P405106-9 English
01_EN_3P405106-9.indb 7 3/27/2015 1:53:09 PM
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