Daikin VRV W T-series - Basic Operation; Cool;Heat;Auto;Fan Operation; Dry Mode

4 Preparation
Installation manual
12
RWEQ96~432TAYCU
VRV W T-Series water-cooled system air conditioner
4P540122-1B – 2018.11
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 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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.
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
MBH class 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).
Outside unit
capacity type (MBH)
2 pipes 3 pipes
96 KHRP26A33T9 KHRP25A33T9
120~216 KHRP26M72TU9 KHRP25M72TU9
240~432 KHRP26M73TU9 KHRP25M73TU9
▪ 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
index
2 pipes 3 pipes
<72 KHRP26A22T9 KHRP25A22T9
72≤x<111 KHRP26A33T9 KHRP25A33T9
111≤x<246 KHRP26M72TU9 KHRP25M72TU9
≥246 KHRP26M73TU9 KHRP25M73TU9
▪ 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
index
2 pipes 3 pipes
<72 KHRP26M22H9
(Max. 4 branches)
or
KHRP26M33H9
(Max. 8 branches)
KHRP25M33H9
72≤x<111 KHRP26M33H9