Daikin VRV IV RXYQ TYDN Series Engineering Data page 19

Installation Manual
7.3.3. Piping between refrigerant branch kit and BP unit: F
Pipe size for direct connection on BP unit must be based on the total
capacity of the connected indoor units (only in case Mini-split indoor
units are connected).
connected indoor units
< 24
< 57
> 57
Example:
of unit 5
7.3.4. Piping between BP unit and Mini-split indoor unit: G
Only in case Mini-split indoor units are connected.
07, 09, 12
15, 18, 24
7.3.5. 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
07, 09, 12, 18
24, 30, 36, 48, 54
72
96
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.
to increase the diameter of piping to improve performance.
1 Outdoor unit
2
3 Increase
4 First refrigerant branch kit
5 Indoor unit
3P362438-1B English
20
Gas pipe Liquid pipe
1/2 in. (12.7 mm) 1/4 in. (6.4 mm)
5/8 in. (15.9 mm)
3/8 in. (9.5 mm)
3/4 in. (19.1 mm)
Gas pipe Liquid pipe
3/8 in. (9.5 mm)
1/4 in. (6.4 mm)
1/2 in. (12.7 mm)
Piping outer diameter size
Gas pipe Liquid pipe
1/2 in. (12.7 mm) 1/4 in. (6.4 mm)
5/8 in. (15.9 mm)
3.4 in. (19.1 mm) 3/8 in. (9.5 mm)
7/8 in. (22.2 mm)
2 3 5
1
4
Size up for equivalent length for outdoor-indoor units over 295 ft. (90 m)
Outdoor unit capacity
Gas pipe
type
3/4 in. (19.1 mm)
RXYQ72T type
7/8 in. (22.2 mm)
7/8 in. (22.2 mm)
RXYQ96T type
1 in. (25.4 mm)
RXYQ120T type Increase is NOT allowed
RXYQ144T type
1-1/8 in. (28.6 mm)
1-1/4 in. (31.8 mm)
RXYQ168-216T type
RXYQ240T type Increase is NOT allowed
1-3/8 in. (34.9 mm)
RXYQ264-336T type
1-1/2 in. (38.1 mm)
RXYQ360-408T type Increase is NOT allowed
(a) If size is NOT available, increase is NOT allowed.
7.4. Selection of refrigerant branch kits
Refrigerant refnets
choose from the following table in accordance with the capacity of
size).
Outdoor unit capacity type
RXYQ 72, 96T type
RXYQ 120-216T type
RXYQ 240-408T type
see 7.3. Selection of piping size), select the proper branch kit model
the refrigerant branch.
< 72
< 111
< 246
Concerning refnet headers, choose from the following table in
accordance with the total capacity of all the indoor units connected
below the refnet header.
< 72
< 111
< 230
EDUS341411-N
Liquid pipe
3/8 in. (9.5 mm)
1/2 in. (12.7 mm)
(a)
1/2 in. (12.7 mm)
5/8 in. (15.9 mm)
(a)
5/8 in. (15.9 mm)
3/4 in. (19.1 mm)
3/4 in. (19.1 mm)
(a)
7/8 in. (22.2 mm)
Kit name
KHRP26M33T
KHRP26M72TU9
KHRP26M73TU9
Kit name
KHRP26M22T
KHRP26M33T
KHRP26M72TU9
KHRP26M73TU9
Kit name
KHRP26M22H9:
or
KHRP26M33H9:
KHRP26M33H9
KHRP26M72H9
KHRP26M73H9
10
3P362438-1B
Installation of Outdoor Units