Daikin VRV IV RXYQ TYDN Series - 7.3.3. Piping between refrigerant branch kit and BP unit: F; 7.3.4. Piping between BP unit and Mini-split indoor unit: G; 7.3.5. Piping between refrigerant branch kit and indoor unit: E; 7.4. Selection of refrigerant branch kits

Installation Manual EDUS341411-N
20 Installation of Outdoor Units
3P362438-1B
10
3P362438-1B English
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).
6QVCNECRCEKV[KPFGZQH
connected indoor units
Gas pipe Liquid pipe
< 24 1/2 in. (12.7 mm) 1/4 in. (6.4 mm)
Űu < 57
5/8 in. (15.9 mm)
3/8 in. (9.5 mm)
> 57 3/4 in. (19.1 mm)
Example:
&QYPUVTGCOECRCEKV[HQT(ECRCEKV[KPFGZQHWPKVECRCEKV[KPFGZ
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.
+PFQQTWPKVECRCEKV[KPFGZ Gas pipe Liquid pipe
07, 09, 12 3/8 in. (9.5 mm)
1/4 in. (6.4 mm)
15, 18, 24 1/2 in. (12.7 mm)
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
ECRCEKV[KPFGZ
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, 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)
r 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.
r 'XGPCUVJGNGPIVJQHVJGRKRKPIKUNGUUVJCPHVOKVKUCDNG
to increase the diameter of piping to improve performance.
1
5
2 3
4
1 Outdoor unit
2 /CKPRKRGUQWVFQQTWPKVVQƂTUVTGHTKIGTCPVDTCPEJMKV
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
RXYQ72T type
3/4 in. (19.1 mm)
o 7/8 in. (22.2 mm)
3/8 in. (9.5 mm)
o 1/2 in. (12.7 mm)
RXYQ96T type
7/8 in. (22.2 mm)
o 1 in. (25.4 mm)
(a)
RXYQ120T type Increase is NOT allowed
1/2 in. (12.7 mm)
o 5/8 in. (15.9 mm)
RXYQ144T type
1-1/8 in. (28.6 mm)
o 1-1/4 in. (31.8 mm)
(a)
RXYQ168-216T type
5/8 in. (15.9 mm)
o 3/4 in. (19.1 mm)
RXYQ240T type Increase is NOT allowed
RXYQ264-336T type
1-3/8 in. (34.9 mm)
o 1-1/2 in. (38.1 mm)
(a)
3/4 in. (19.1 mm)
o 7/8 in. (22.2 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
(QTRKRKPIGZCORNGTGHGTVQ5GNGEVKQPQHRKRKPIUK\GQPRCIG|
r 9JGPWUKPITGHPGVLQKPVUCVVJGƂTUVDTCPEJHTQOVJGQWVFQQTWPKV
choose from the following table in accordance with the capacity of
VJGQWVFQQTWPKVGZCORNGTGHPGVLQKPVCUGG5GNGEVKQPQHRKRKPI
size).
Outdoor unit capacity type Kit name
RXYQ 72, 96T type KHRP26M33T
RXYQ 120-216T type KHRP26M72TU9
RXYQ 240-408T type KHRP26M73TU9
r (QTTGHPGVLQKPVUQVJGTVJCPVJGƂTUVDTCPEJGZCORNGTGHPGVLQKPVD
see 7.3. Selection of piping size), select the proper branch kit model
DCUGFQPVJGVQVCNECRCEKV[KPFGZQHCNNKPFQQTWPKVUEQPPGEVGFCHVGT
the refrigerant branch.
+PFQQTWPKVECRCEKV[KPFGZ Kit name
< 72 KHRP26M22T
Űu < 111
KHRP26M33T
Űu < 246
KHRP26M72TU9
ű KHRP26M73TU9
r Concerning refnet headers, choose from the following table in
accordance with the total capacity of all the indoor units connected
below the refnet header.
+PFQQTWPKVECRCEKV[KPFGZ Kit name
< 72
KHRP26M22H9:
OCZKOWOKPFQQTWPKVU
or
KHRP26M33H9:
OCZKOWOKPFQQTWPKVU
Űu < 111
KHRP26M33H9
Űu < 230
KHRP26M72H9
ű KHRP26M73H9