English
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Example of connection 2: When there is a branch downstream from the BS unit
Table 1 Indoor unit total capacity and pipe size
Table 2 Indoor unit connection pipe size
* 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 CONNEC-
TION” 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)
Total capacity of indoor units
(Q)
Piping size (outer diameter × minimum thickness)
Upstream
Downstream
Suction gas pipe
HP/LP gas pipe
Liquid pipe
Gas pipe
Liquid pipe
Q < 150
φ
15.9 × 0.99
φ
12.7 × 0.80
φ
9.5 × 0.80
φ
15.9 × 0.99
φ
9.5 × 0.80
150
≤
Q < 200
φ
19.1 × 0.80
φ
15.9 × 0.99
φ
19.1 × 0.80
200
≤
Q
≤
250
φ
22.2 × 0.80
φ
19.1 × 0.80
φ
22.2 × 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, 125
φ
15.9 × 0.99
φ
9.5 × 0.80
200
φ
19.1 × 0.80
250
φ
22.2 × 0.80
(mm)
BS unit
Piping size (outer diameter)
Gas pipe
Liquid pipe
BSVQ100P
φ
15.9
φ
9.5
BSVQ160P
BSVQ250P
φ
22.2
Indoor unit
Indoor unit
Indoor unit
Gas pipe
Liquid pipe
Determine using
Table 1
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
HP/LP gas pipe
Liquid pipe
BS
unit
Refrigerant branch kit
<Upstream>
<Downstream>
Suction gas pipe (Site piping)
HP/LP gas pipe (Site piping)
Gas pipe (Site piping)
Liquid pipe (Site piping)
Liquid pipe (Site piping)
BS unit
(Top)
BSVQ100P type
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.
01_EN_3P194121-1E.fm Page 9 Thursday, September 4, 2008 5:33 PM
