Daikin BS1Q10ACV1B Installation Manual page 12

Example of connection 2: When there is a branch downstream from the BS unit
To refrigerant branch
kit or outdoor unit
Table 1 Indoor unit total capacity and pipe size
Total capacity of indoor units
(Q)
Q < 150
150 ≤ Q < 200
200 ≤ Q ≤ 250
Table 2 Indoor unit connection pipe size
Capacity type of indoor units
15, 20, 25, 32, 40, 50
63, 80, 100, 125
200
250
* 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
CONNECTION" and use the included pipe to make the connection.
Table 3 BS unit connection pipe size
BS unit
BS1Q10
BS1Q16
BS1Q25
6-5 PIPING CONNECTION
Follow the connection example below and connect the site piping.
BS1Q10 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.
Suction gas pipe (Site piping)
HP/LP gas pipe (Site piping)
Liquid pipe (Site piping)
10
Determine using Table 1 based
on the total capacity of the indoor
units connected downstream.
<Upstream> <Downstream>
Suction gas pipe
BS
unit
HP/LP gas pipe
Liquid pipe
Upstream
Suction gas pipe HP/LP gas pipe
φ15.9x0.99 φ12.7x0.80
φ19.1x0.80 φ15.9x0.99
φ22.2x0.80 φ19.1x0.80
Gas pipe
φ12.7x0.80
φ15.9x0.99
φ19.1x0.80
φ22.2x0.80
Gas pipe
φ15.9
φ22.2
BS unit
(Top)
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.
Gas pipe
Liquid pipe
Indoor unit
Piping size (outer diameter x minimum thickness)
Liquid pipe
φ9.5x0.80
Piping size (outer diameter x minimum thickness)
Piping size (outer diameter)
Gas pipe (Site piping)
Liquid pipe (Site piping)
Refrigerant branch kit
Indoor unit Indoor unit
Downstream
Gas pipe
φ15.9x0.99
φ19.1x0.80
φ22.2x0.80
Liquid pipe
φ6.4x0.80
φ9.5x0.80
Liquid pipe
φ9.5
(mm)
Liquid pipe
φ9.5x0.80
(mm)
(mm)
English