Daikin VRV - WII, Service Manual

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Features SiUS30-604
4 General Information
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.
Cold climate capability
General air cooled
air conditioning system
VRV-WII
Level difference
between indoor units:
up to 49 ft
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.
Total heating
capacity(%)
Outside air
temperature
(CDB)
-14.7
100
60
80
-12.6 -10.5 -9.5 -8.5 -7.0 -5.0 -3.0 0.0 3.0 5.0
Refrigerant piping
Water piping
VRV-WII
VRV-WII
Level difference
between
the VRV-WII units:
up to 6.5 ft
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
REFNET Joint
Actual piping length
after piping branch:
up to 130 ft
Standard system (Heat pump type)
*Example only.
• Actual length up to outside unit
branch piping: up to 33 ft
• Equivalent length up to outside
unit branch piping: up to 43 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