To Select Refrigerant Branch Kits - Daikin VRV W T-Series Installation Manual

4 Preparation
In case of heat recovery mode
Outside unit
capacity type (MBH)
Suction gas
pipe
96 7/8 (22.2)
120 1-1/8 (28.6)
144
192, 216
240 1-3/8 (34.9)
264~336
360~432 1-5/8 (41.3)
D: Piping between refrigerant branch kits or
refrigerant branch kit and branch selector unit
Choose from the following table in accordance with the indoor unit
total capacity type, connected downstream. Do not let the
connection piping exceed the refrigerant piping size chosen by the
general system model name.
In case of heat pump mode
Indoor unit capacity
index
Gas pipe
<54 5/8 (15.9)
54≤x<72 3/4 (19.1)
72≤x<111 7/8 (22.2)
111≤x<162 1-1/8 (28.6)
162≤x<230
230≤x<300 1-3/8 (34.9)
≥300 1-5/8 (41.3)
In case of heat recovery mode
Indoor unit capacity
index
Suction gas
pipe
<54 5/8 (15.9)
54≤x<72 3/4 (19.1)
72≤x<111 7/8 (22.2)
111≤x<162 1-1/8 (28.6)
162≤x<230
230≤x<300 1-3/8 (34.9)
≥300 1-5/8 (41.3)
Example:
▪ Downstream capacity for E=[capacity index of unit 1]
▪ Downstream capacity for D=[capacity index of unit 1]+[capacity
index of unit 2]
E: Piping between refrigerant branch kit or branch
selector unit and indoor unit
For heat pump mode and heat recovery mode
Pipe size for direct connection to indoor unit must be the same as
the connection size of the VRV indoor units.
Installation manual
12
Unit: inch (mm)
Piping outer diameter size
High/low Liquid pipe
pressure gas
pipe
3/4 (19.1) 3/8 (9.5)
1/2 (12.7)
7/8 (22.2)
1-1/8 (28.6) 5/8 (15.9)
3/4 (19.1)
1-3/8 (34.9)
Unit: inch (mm)
Piping outer diameter size
Liquid pipe
3/8 (9.5)
1/2 (12.7)
5/8 (15.9)
3/4 (19.1)
Unit: inch (mm)
Piping outer diameter size
High Liquid pipe
pressure/low
pressure gas
pipe
1/2 (12.7) 3/8 (9.5)
5/8 (15.9)
3/4 (19.1)
1/2 (12.7)
1-1/8 (28.6) 5/8 (15.9)
3/4 (19.1)
Indoor unit capacity
index
Gas pipe
05~18 1/2 (12.7)
24~54 5/8 (15.9)
72 3/4 (19.1)
96 7/8 (22.2)
▪ If a size-up of the piping is required, refer to the table below.
a
c
b
d
a
Outside unit
b Main pipes
c Increase
d First refrigerant branch kit
e Indoor unit
Size up
MBH class Liquid piping outer diameter size
96
120, 144
192~240
264~432
4 .3 .3

To select refrigerant branch kits

Refrigerant refnets
For piping example, refer to "4.3.2 To select the piping size" on
page 11.
▪ When using refnet joints at the first branch counted from the
outside unit side, choose from the following table in accordance
with the capacity of the outside unit (example: refnet joint a).
Outside unit 2 pipes
capacity type (MBH)
96 KHRP26A33T9
120~216 KHRP26M72TU9
240~432 KHRP26M73TU9
▪ For refnet joints other than the first branch (example refnet joint b),
select the proper branch kit model based on the total capacity
index of all indoor units connected after the refrigerant branch.
Indoor unit capacity 2 pipes
index
<72 KHRP26A22T9
72≤x<111 KHRP26A33T9
111≤x<246 KHRP26M72TU9
≥246 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 2 pipes
index
<72 KHRP26M22H9
(Max. 4 branches)
KHRP26M33H9
(Max. 8 branches)
72≤x<111 KHRP26M33H9
VRV W T-Series water-cooled system air conditioner
Unit: inch (mm)
Piping outer diameter size
Liquid pipe
1/4 (6.4)
3/8 (9.5)
e
Unit: inch (mm)
3/8 → 1/2 (9.5 → 12.7)
1/2 → 5/8 (12.7 → 15.9)
5/8 → 3/4 (15.9 → 19.1)
3/4 → 7/8 (19.1 → 22.2)
3 pipes
KHRP25A33T9
KHRP25M72TU9
KHRP25M73TU9
3 pipes
KHRP25A22T9
KHRP25A33T9
KHRP25M72TU9
KHRP25M73TU9
3 pipes
KHRP25M33H9
or
RWEQ96~432TAYCU
4P540122-1B – 2018.11