Daikin REYQ120TTJU, Installation Manual

Page: 13 / 46

10 3P362438-3H English
7 .3 .2 . Piping between refrigerant branch kits or refrigerant
branch kit and BS unit: D
Choose from the following table in accordance with the indoor unit
total capacity type, connected downstream. Do not let the connec-
tion piping 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 D = capacity index of (unit 3 + unit 4 + unit 5
+ unit 6)
7 .3 .3 . Piping between refrigerant branch kit and indoor unit: E
Pipe size for direct connection to indoor unit must be the same as the
connection size of the VRV indoor unit.
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 unit,
choose from the following table in accordance with the capacity of
the outdoor unit (example: REFNET joint a - see 7.3. Selection of
piping size).
Outdoor unit capacity type kit name
REYQ 72, 96T type KHRP25A33T9
REYQ 120-216T type KHRP25M72TU9
REYQ 240-456T type 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 index of all indoor units con -
nected after the refrigerant branch.
Indoor unit
capacity index
kit name
3 pipes 2 pipes
< 72 KHRP25A22T9 KHRP26A22T9
72 ≤
×
< 111 KHRP25A33T9 KHRP26A33T9
111 ≤
×
< 246 KHRP25M72TU9 KHRP26M72TU9
≥246 KHRP25M73TU9 KHRP26M73TU9
• Concerning REFNET headers, choose from the following table in
accordance with the total capacity of all the indoor units connected
below the REFNET header.
Indoor unit
capacity index
kit name
3 pipes 2 pipes
< 72
KHRP25M33H9
KHRP26M22H9:
maximum 4 indoor units
or
KHRP26M33H9:
maximum 8 indoor units
72 ≤
×
< 111 KHRP26M33H9
111 ≤
×
< 230 KHRP25M72H9 KHRP26M72H9
≥230 KHRP25M73HU9 KHRP26M73H9
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 Branch kit name
2 BHFP26P100U
3 BHFP26P151U
01_EN_3P362438-3H.indb 10 1/14/2015 10:19:32 AM