Daikin VRV - WII Service Manual page 17

Features
Cold climate capability
Because the system is water cooled, the outside air temperature does not affect capacity.
Furthermore, water cooling means no defrost operation is required, so rapid starting assures
quick and comfortable heating in the coldest conditions.
Long refrigerant piping length
Within the refrigerant piping system, up to 390 ft of actual piping length and 164 ft of height
difference between the VRV-WII and indoor units are possible. Water piping does not enter
occupied spaces, so there is no worry of water leaking.
If the VRV-WII is above indoor units. 131 ft if the VRV-WII is below indoor units.
Standard system (Heat pump type)
VRV-WII
Level difference
between
the VRV-WII units:
up to 6.5 ft
• Actual piping length between the VRV-WII and
indoor units: up to 390 ft
• Equivalent piping length between the VRV-WII
and indoor units: up to 459 ft
• Total piping length between the VRV-WII and
indoor units: up to 980 ft
4
Total heating
capacity(%)
100
80
60
-14.7 -12.6 -10.5
VRV-WII
• Actual length up to outside unit
branch piping: up to 33 ft
• Equivalent length up to outside
unit branch piping: up to 43 ft
-9.5 -8.5 -7.0 -5.0 -3.0
Actual piping length
after piping branch: up to 130 ft
REFNET Joint
General air cooled
VRV-WII
air conditioning system
Outside air
temperature
0.0 3.0 5.0
*Example only.
Water piping
Refrigerant piping
Level difference between
the VRV-WII and indoor units:
Up to 164 ft if the VRV-WII is above
Up to 130 ft if the VRV-WII is below
Level difference
between indoor units:
up to 49 ft
General Information
SiUS30-604
(CDB)