4 Preparation
Installation manual
12
RWEQ96~432TAYD
∗
+ RWEQ96~432TATJ
∗
VRV W T-Series water-cooled system air conditioner
A, B, C: Piping between outside unit and (first)
refrigerant branch kit
Choose from the following table in accordance with the outside unit
total capacity type, connected downstream.
In case of heat pump mode
Unit: inch (mm)
Outside unit
capacity type (MBH)
Piping outer diameter size
Gas pipe
Liquid pipe
96
7/8 (22.2)
3/8 (9.5)
120, 144
1-1/8 (28.6)
1/2 (12.7)
192, 216
5/8 (15.9)
240
1-3/8 (34.9)
264~336
3/4 (19.1)
360~432
1-5/8 (41.3)
In case of heat recovery mode
Unit: inch (mm)
Outside unit
capacity type (MBH)
Piping outer diameter size
Suction gas
pipe
High/low
pressure gas
pipe
Liquid pipe
96
7/8 (22.2)
3/4 (19.1)
3/8 (9.5)
120
1-1/8 (28.6)
1/2 (12.7)
144
7/8 (22.2)
192, 216
1-1/8 (28.6)
5/8 (15.9)
240
1-3/8 (34.9)
264~336
3/4 (19.1)
360~432
1-5/8 (41.3)
1-3/8 (34.9)
D: Piping between refrigerant branch kits, branch
selector units, 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
Unit: inch (mm)
Indoor unit capacity
index
Piping outer diameter size
Gas pipe
Liquid pipe
<54
5/8 (15.9)
3/8 (9.5)
54≤x<72
3/4 (19.1)
72≤x<111
7/8 (22.2)
111≤x<162
1-1/8 (28.6)
1/2 (12.7)
162≤x<230
5/8 (15.9)
230≤x<300
1-3/8 (34.9)
3/4 (19.1)
≥300
1-5/8 (41.3)
In case of heat recovery mode
Unit: inch (mm)
Indoor unit capacity
index
Piping outer diameter size
Suction gas
pipe
High
pressure/low
pressure gas
pipe
Liquid pipe
<54
5/8 (15.9)
1/2 (12.7)
3/8 (9.5)
54≤x<72
3/4 (19.1)
5/8 (15.9)
72≤x<111
7/8 (22.2)
3/4 (19.1)
111≤x<162
1-1/8 (28.6)
1/2 (12.7)
162≤x<230
1-1/8 (28.6)
5/8 (15.9)
230≤x<300
1-3/8 (34.9)
3/4 (19.1)
≥300
1-5/8 (41.3)
Example:
Downstream capacity for D*=[capacity index of (unit 3 + unit 4 +
unit 5 + unit 6 + unit 7 + unit 8 + unit 9)]
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.
Unit: inch (mm)
Indoor unit capacity
index
Piping outer diameter size
Gas pipe
Liquid pipe
05~18
1/2 (12.7)
1/4 (6.4)
24~54
5/8 (15.9)
3/8 (9.5)
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
e
b
c
d
a
Outside unit
b
Main pipes
c
Increase
d
First refrigerant branch kit
e
Indoor unit
Unit: inch (mm)
Size up
Outside unit
capacity type (MBH)
Liquid piping outer diameter size
96
3/8
→
1/2 (9.5
→
12.7)
120, 144
1/2
→
5/8 (12.7
→
15.9)
192~240
5/8
→
3/4 (15.9
→
19.1)
264~432
3/4
→
7/8 (19.1
→
22.2)
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).
01_EN_4P602454-1C.indd 12
2020/07/29 16:16:39
