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Piping installation
Installer and user reference guide
82
REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P687640-1 – 2022.07
A, B: Piping between outdoor unit and (first) refrigerant branch kit
Choose from the following table in accordance with the outdoor unit total capacity
type. Pipe A is in case of multi-connection the sum of the outdoor units connected
upstream. In case there is no first indoor branch kit (c), pipe A is connected to the
first BS unit.
HP class
Piping outer diameter [mm]
Liquid pipe
Suction gas pipe
HP/LP gas pipe
5~10
9.5
19.1
15.9
12~18
12.7
22.2
19.1
20~24
12.7
28.6
22.2
26~28
15.9
28.6
22.2
C: Piping between refrigerant branch kits, BS units, or refrigerant branch kits and BS units
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.
Example:
▪
Downstream
capacity
for
C'=[capacity
index
of
unit a1]+[unit a2]+[unit a3]+[unit a4]+[unit a5]+[unit a6]+[unit a7]
▪
Downstream capacity for C''=[capacity index of unit a3]+[unit a4]
Indoor unit
capacity index
Piping outer diameter [mm]
Liquid pipe
Suction gas pipe
HP/LP gas pipe
<150
9.5
15.9
12.7
150≤x<290
19.1
15.9
290≤x<450
12.7
22.2
19.1
450≤x<620
28.6
22.2
≥620
15.9
D: Piping between refrigerant branch kit or BS unit and indoor unit
Pipe size for direct connection to indoor unit must be the same as the connection
size of the indoor unit (in case indoor unit is VRV DX indoor).
Indoor unit capacity index
Piping outer diameter [mm]
Gas pipe
Liquid pipe
10~32
9.5
6.4
40~80
12.7
100~140
15.9
9.5
200~250
19.1
▪
If a size-up of the piping is required, refer to the table below.
e
e
e
h
g
g
g
h
h
b
d
c
a
f
f
a
Outdoor unit