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7.3.1.
Piping between outdoor units and (first) refrigerant
branch kit: A, B, C
Choose from the following table in accordance with the outdoor unit
total capacity type, connected downstream.
Piping outer diameter size
Outdoor unit
Suction gas
capacity type
pipe
3/4 in.
REYQ72X type
(19.1 mm)
7/8 in.
REYQ96X type
(22.2 mm)
REYQ120X type
REYQ144X type
1-1/8 in.
(28.6 mm)
REYQ168X type
REYQ192, 216X type
REYQ240X type
1-3/8 in.
(34.9 mm)
REYQ264-336X type
1-5/8 in.
REYQ360-456X type
(41.3 mm)
7.3.2. Piping between refrigerant branch kits, Branch Selector
units, or refrigerant branch kits and Branch Selector units: D
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.
Piping outer diameter size
Indoor unit
Suction gas
capacity index
pipe
5/8 in.
<54
(15.9 mm)
3/4 in.
54≤×<72
(19.1 mm)
7/8 in.
72≤×<111
(22.2 mm)
111≤×<162
1-1/8 in.
(28.6 mm)
162≤×<230
1-3/8 in.
230≤×<300
(34.9 mm)
1-5/8 in.
≥300
(41.3 mm)
Example:
Downstream capacity for D* = capacity index of (unit 3 + unit 4 + unit 5
+ unit 6 + unit 7 + unit 8 + unit 9)
7.3.3. Piping between refrigerant branch kits or Branch Selec-
tor units and indoor units: E
Pipe size for direct connection to indoor units must be the same as the
connection size of the VRV indoor units.
Piping outer diameter size
Indoor unit
capacity index
Gas pipe
05, 07, 09, 12, 15, 18
1/2 in. (12.7 mm)
24, 30, 36, 42,
5/8 in. (15.9 mm)
48, 54
72
3/4 in. (19.1 mm)
96
7/8 in. (22.2 mm)
English
High/low
pressure gas
Liquid pipe
pipe
5/8 in.
(15.9 mm)
3/8 in.
(9.5 mm)
3/4 in.
(19.1 mm)
1/2 in.
(12.7 mm)
7/8 in.
(22.2 mm)
5/8 in.
(15.9 mm)
1-1/8 in.
(28.6 mm)
3/4 in.
1-3/8 in.
(19.1 mm)
(34.9 mm)
High/low
pressure gas
Liquid pipe
pipe
1/2 in.
(12.7 mm)
5/8 in.
3/8 in.
(15.9 mm)
(9.5 mm)
3/4 in.
(19.1 mm)
1/2 in.
(12.7 mm)
5/8 in.
(15.9 mm)
1-1/8 in.
(28.6 mm)
3/4 in.
(19.1 mm)
Liquid pipe
1/4 in. (6.4 mm)
3/8 in. (9.5 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
REYQ72, 96X type
REYQ120-216X type
REYQ240-456X type
• 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
(for 3 pipes)
KHRP25A22T9
<72
KHRP25A22TA
KHRP25A33T9
72≤×<111
KHRP25A33TA
KHRP25M72TU9
111≤×<246
KHRP25M72TUA
KHRP25M73TU9
≥246
KHRP25M73TUA
• 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
(for 3 pipes)
<72
KHRP25M33H9
KHRP25M33HA
72≤×<111
KHRP25M72H9
111≤×<230
KHRP25M72HA
KHRP25M73HU9
≥230
KHRP25M73HUA
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 192 or more). Choose from the follow-
ing table in accordance with the number of outdoor units.
Number of outdoor units
2
3
Kit name
KHRP25A33T9
KHRP25A33TA
KHRP25M72TU9
KHRP25M72TUA
KHRP25M73TU9
KHRP25M73TUA
Kit name
(for 2 pipes)
KHRP26A22T9
KHRP26A22TA
KHRP26A33T9
KHRP26A33TA
KHRP26M72TU9
KHRP26M72TUA
KHRP26M73TU9
KHRP26M73TUA
Kit name
(for 2 pipes)
KHRP26M22H9/
KHRP26M22HA:
maximum 4 indoor units
or
KHRP26M33H9/
KHRP26M33HA:
maximum 8 indoor units
KHRP26M33H9
KHRP26M33HA
KHRP26M72H9
KHRP26M72HA
KHRP26M73HU9
KHRP26M73HUA
Branch kit name
BHFP26P100U
BHFP26P100UA
BHFP26P151U
BHFP26P151UA
10
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