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3P477778-7G English
7 .3 .1 .
Piping between outdoor units and (first) refrigerant
branch kit: A, B
Choose from the following table in accordance with the outdoor unit
total capacity type, connected downstream.
Outdoor unit
capacity type
Piping outer diameter size
Suction gas
pipe
High/low
pressure gas
pipe
liquid pipe
REYQ72X type
3/4 in.
(19.1 mm)
5/8 in.
(15.9 mm)
3/8 in.
(9.5 mm)
REYQ96X type
7/8 in.
(22.2 mm)
3/4 in.
(19.1 mm)
REYQ120X type
1-1/8 in.
(28.6 mm)
1/2 in.
(12.7 mm)
REYQ144X type
7/8 in.
(22.2 mm)
REYQ168X type
5/8 in.
(15.9 mm)
REYQ192, 216X type
1-1/8 in.
(28.6 mm)
REYQ240X type
1-3/8 in.
(34.9 mm)
REYQ264-336X type
3/4 in.
(19.1 mm)
REYQ360-456
X
type
1-5/8 in.
(41.3 mm)
1-3/8 in.
(34.9 mm)
7 .3 .2 . Piping between refrigerant branch kits or refrigerant
branch kits and Branch Selector units: C
Choose from the following table in accordance with the indoor unit
total capacity, connected downstream. Do not let the connection pip-
ing exceed the refrigerant piping size chosen by the general system
model name.
Indoor unit
capacity index
Piping outer diameter size
Suction gas
pipe
High/low
pressure gas
pipe
liquid pipe
<54
5/8 in.
(15.9 mm)
1/2 in.
(12.7 mm)
3/8 in.
(9.5 mm)
54≤
×
<72
3/4 in.
(19.1 mm)
5/8 in.
(15.9 mm)
72≤
×
<111
7/8 in.
(22.2 mm)
3/4 in.
(19.1 mm)
111≤
×
<162
1-1/8 in.
(28.6 mm)
1/2 in.
(12.7 mm)
162≤
×
<230
1-1/8 in.
(28.6 mm)
5/8 in.
(15.9 mm)
230≤
×
<300
1-3/8 in.
(34.9 mm)
3/4 in.
(19.1 mm)
>300
1-5/8 in.
(41.3 mm)
Example:
Downstream capacity for C = capacity index of (unit 3 + unit 4 + unit 5
+ unit 6)
7 .3 .3 . Piping between refrigerant branch kits or Branch Selec-
tor units and indoor units: D
Pipe size for direct connection to indoor units must be the same as the
connection size of the VRV indoor units.
Indoor unit
capacity index
Piping outer diameter size
Gas pipe
liquid pipe
07, 09, 12, 18
1/2 in. (12.7 mm)
1/4 in. (6.4 mm)
24, 30, 36, 42,
48, 54
5/8 in. (15.9 mm)
3/8 in. (9.5 mm)
72
3/4 in. (19.1 mm)
96
7/8 in. (22.2 mm)
7 .4 . Selection of refrigerant branch kits
For piping example, refer to 7.3. Selection of piping size on page 9.
• When using REFNET joints at the first branch from the outdoor
units, choose from the following table in accordance with the capac-
ity of the outdoor unit (example: REFNET joint a - see 7.3. Selection
of piping size).
Outdoor unit capacity type
kit name
REYQ72, 96X type
KHRP25A33T9
KHRP25A33TA
REYQ120-216X type
KHRP25M72TU9
KHRP25M72TUA
REYQ240-456X type
KHRP25M73TU9
KHRP25M73TUA
• For REFNET joints other than the first branch (example REFNET
joint b - see 7.3. Selection of piping size), select the proper branch
kit model based on the total capacity of all indoor units connected
after the refrigerant branch.
Indoor unit
capacity index
kit name
(for 3 pipes)
(for 2 pipes)
<72
KHRP25A22T9
KHRP25A22TA
KHRP26A22T9
KHRP26A22TA
72≤
×
<111
KHRP25A33T9
KHRP25A33TA
KHRP26A33T9
KHRP26A33TA
111≤
×
<246
KHRP25M72TU9
KHRP25M72TUA
KHRP26M72T9
KHRP26M72TUA
≥246
KHRP25M73TU9
KHRP25M73TUA
KHRP26M73T9
KHRP26M73TUA
• Concerning REFNET headers, choose from the following table in
accordance with the total capacity of all the indoor units connected
after the REFNET header.
Indoor unit
capacity index
kit name
(for 3 pipes)
(for 2 pipes)
<72
KHRP25M33H9
KHRP25M33HA
KHRP26M22H9/
KHRP26M22HA:
maximum 4 inddor units
or
KHRP26M33H9/
KHRP26M33HA:
maximum 8 indoor units
72≤
×
<111
KHRP26M33H9
KHRP26M33HA
111≤
×
<230
KHRP25M72H9
KHRP25M72HA
KHRP26M72H9
KHRP26M72HA
≥230
KHRP25M73HU9
KHRP25M73HUA
KHRP26M73H9
KHRP26M73HA
INFORMATION
Maximum 8 branches can be connected to a header.
•
How to choose an outdoor multi connection piping kit (needed if the
outdoor unit capacity type is 144 or more). Choose from the follow-
ing table in accordance with the number of outdoor units.
Number of outdoor units
Branch kit name
2
BHFP26P100U
BHFP26P100UA
3
BHFP26P151U
BHFP26P151UA
01_EN_3P477778-7G.indb 10
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