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English
7 .3 .2 . Piping between refrigerant branch kits: C
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
Gas pipe
Liquid pipe
< 54
5/8 in. (15.9 mm)
3/8 in. (9.5 mm)
54 ≤
×
< 72
3/4 in. (19.1 mm)
72 ≤
×
< 111
7/8 in. (22.2 mm)
111 ≤
×
< 162
1-1/8 in. (28.6 mm)
1/2 in. (12.7 mm)
162 ≤
×
< 230
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 1 + capacity index
of unit 2
7 .3 .3 . Piping between refrigerant branch kit and indoor unit: D
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
05, 07, 09, 12, 18
1/2 in. (12.7 mm)
1/4 in. (6.4 mm)
24, 30, 36, 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)
•
When the equivalent pipe length between outdoor and indoor units
is 295 ft. (90 m) or more, the size of the main pipes (both gas side
and liquid side) must be increased. Depending on the length of the
piping, the capacity may drop, but even in such a case it is possible
to increase the size of the main pipes.
• Even as the length of the piping is less than 295 ft. (90 m), it is able
to increase the diameter of piping to improve performance.
1
5
2
3
4
1 Outdoor unit
2
Main pipes (outdoor unit to first refrigerant branch kit)
3 Increase
4 First refrigerant branch kit
5 Indoor unit
Size up for equivalent length for outdoor-indoor units over 295 ft. (90 m)
Outdoor unit
capacity type
Gas pipe
Liquid pipe
RXLQ72T type
3/4 in. (19.1 mm)
→
7/8 in. (22.2 mm)
3/8 in. (9.5 mm)
→
1/2 in. (12.7 mm)
RXLQ96T type
7/8 in. (22.2 mm)
→
1 in. (25.4 mm)
(a)
RXLQ120T type
Increase is NOT allowed 1/2 in. (12.7 mm)
→
5/8 in. (15.9 mm)
RXLQ144T type
1-1/8 in. (28.6 mm)
→
1-1/4 in. (31.8 mm)
(a)
RXLQ192T type
5/8 in. (15.9 mm)
→
3/4 in. (19.1 mm)
RXLQ240T type
Increase is NOT allowed
(a) If size is NOT available, increase is NOT allowed.
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
RXLQ 72, 96 T type
KHRP26A33T9
RXLQ 120-192 T type
KHRP26M72TU9
RXLQ 240 T type
KHRP26M73TU9
• 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
< 72
KHRP26A22T9
72 ≤
×
< 111
KHRP26A33T9
111 ≤
×
< 246
KHRP26M72TU9
≥246
KHRP26M73TU9
• 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
< 72
KHRP26M22H9:
maximum 4 indoor units
or
KHRP26M33H9:
maximum 8 indoor units
72 ≤
×
< 111
KHRP26M33H9
111 ≤
×
< 230
KHRP26M72H9
≥230
KHRP26M73HU9
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
BHFP22P100U
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Summary of Contents for VRV Aurora RXLQ120TATJU
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