Selection Of Refrigerant Branch Kits - Daikin REYQ72TAYCU Manuel D'installation

7 .3 .2 . Piping between refrigerant branch kits 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)
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
07, 09, 12, 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)

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
REYQ 72, 96 T type
REYQ 120-192 T type
REYQ 240-384 T type
3P362438-9J English
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)
kit name
KHRP25A33T9
KHRP25M72TU9
KHRP25M73TU9
• 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)
< 72 KHRP25A22T9
72 ≤ × < 111 KHRP25A33T9
111 ≤ × < 246
KHRP25M72TU9
≥246 KHRP25M73TU9
• 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
72 ≤ × < 111
111 ≤ × < 230
KHRP25M72H9
≥230 KHRP25M73HU9
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
(for 2 pipes)
KHRP26A22T9
KHRP26A33T9
KHRP26M72TU9
KHRP26M73TU9
kit name
(for 2 pipes)
KHRP26M22H9:
maximum 4 indoor units
or
KHRP26M33H9:
maximum 8 indoor units
KHRP26M33H9
KHRP26M72H9
KHRP26M73H9
Branch kit name
BHFP26P100U
BHFP26P151U
10