System Layout; Connection Ratio - Daikin VRV HXY48TAVJU Engineering Data

HXY48TAVJU

3. System Layout

3.1 System Layout
The following table indicates the connectable number and capacity range of the low-temperature hydrobox and indoor units.
Please refer the dedicated Engineering Data Book for the specification of respective indoor units.
Minimum VRV indoor unit number
Minimum VRV indoor unit capacity ratio
Max hydrobox number
Total indoor capacity ratio range
3.2

Connection Ratio

When connecting the low-temperature hydrobox, connect VRV indoor units of its total capacity at least 50% of the outdoor unit capability to prevent
the secondary side water temperature from dropping or freezing during defrosting or ON/OFF of the indoor unit.
Total capacity of connected VRV indoor unit
50%
requires at least
Underfloor heating
ton
Refrigerant piping
VRV indoor unit
Low-temperature
of outdoor unit capacity.
hydrobox
Cold water / Hot water
Radiator Ceiling radiator
6 8
50% or more
1 1
50-130%
4
EDUS392021-F18
Heat exchange
between refrigerant
and water
10 12
1
2 2
14
2