Daikin VRV IV+ - Single Outdoor Units and Standard Multi-Outdoor-Unit Combinations >20 HP

18 | Piping installation
Installer and user reference guide
76
REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P561154-1A – 2020.10
If Then
The outdoor unit is positioned higher
than the indoor units
▪ Minimum connection ratio: 80%
▪ Size up the liquid piping (refer to "To
select the piping size"[471] for more
information)
▪ Activate the outdoor unit setting.
Refer to the service manual for more
information.
The outdoor unit is positioned lower
than the indoor units
▪ Minimum connection ratio varies
according to the height difference
between outdoor and indoor units:
- 40~60m: 80%
- 60~65m: 90%
- 65~80m: 100%
- 80~90m: 110%
▪ Size up the liquid piping (refer to "To
select the piping size"[471] for more
information)
▪ Activate the outdoor unit setting.
Refer to the service manual for more
information.
▪ No technical cooling
18.1.6 Single outdoor units and standard multi-outdoor-unit combinations >20 HP
Connection with only VRV DX indoor units
H3
1 5
H1
H2
3 2
4
a
b b
c
d
e
e
a Outdoor unit
b VRV DX indoor unit
c Multi BS unit
d BS unit
e VRV DX indoor unit