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9
Example of connection 2: When there is a branch downstream from the BS unit
Table 1 Indoor unit total capacity and pipe size
*1 In the case of connection to the main pipe, refer to the installation manual provided to the outdoor unit or
the Engineering data book.
Table 2 Indoor unit connection pipe size
*2 The BS 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 2
, follow the instructions in “6-5 PIPING CON-
NECTION” and use the included pipe to make the connection.
Table 3 BS unit connection pipe size
6-5 PIPING CONNECTION
Follow the connection example below and connect the site piping.
(mm)
Indoor capacity index
(Q)
Piping size (outer diameter × minimum thickness)
Suction gas pipe
HP/LP gas pipe
Liquid pipe
Q < 150
φ
15.9 × 0.99
φ
12.7 × 0.80
φ
9.5 × 0.80
150
≤
Q < 200
φ
19.1 × 0.80
φ
15.9 × 0.80
200
≤
Q < 290
φ
22.2 × 0.80
φ
19.1 × 0.80
290
≤
Q < 420
φ
28.6 × 0.99
φ
12.7 × 0.80
420
≤
Q
≤
600
φ
28.6 × 0.99
φ
15.9 × 0.80
(mm)
Capacity type of indoor units
Piping size (outer diameter × minimum thickness)
Gas pipe
Liquid pipe
20, 25, 32, 40, 50
φ
12.7 × 0.80
φ
6.4 × 0.80
63, 80, 100
φ
15.9 × 0.99
φ
9.5 × 0.80
(mm)
BS unit
Piping size (outer diameter)
Gas pipe
Liquid pipe
BSV4Q100PV1
φ
15.9
φ
9.5
BSV6Q100PV1
Indoor unit
Indoor unit
Indoor unit
Refrigerant branch kit
<Downstream>
<Upstream>
BS
unit
Gas
pipe
Liquid
pipe
Liquid pipe
Suction gas pipe
HP/LP gas pipe
To refrigerant branch
kit or outdoor unit
Use the following pipes:
Gas pipe:
φ
15.9 × 1.0
Liquid pipe:
φ
9.5 × 0.8
Determine using
Table 1
based on the total capacity
of the indoor units
connected downstream. *1
(mm)
Refer to the installation manual and
Engineering data book included with the
outdoor it to decide on the respective sizes of
pipes connecting to the refrigerant branch kits
and those connecting between the refrigerant
branch kits and indoor units.
Suction gas pipe (Site piping)
HP/LP gas pipe (Site piping)
Liquid pipe (Site piping)
When the downstream indoor unit total capacity is 100 or less and when one indoor unit with
a capacity of 63 to 100 is connected downstream.
Unit A
Unit B
Unit C
Unit D
Gas pipe (Site piping)
Liquid pipe (Site piping)
BS unit
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01_EN_3P194121-4J.fm Page 9 Wednesday, June 10, 2009 12:39 PM