Daikin Altherma EHBH08DA6V7 - To Connect the Main Power Supply; To Connect the Backup Heater Power Supply

4 Installation
Installation manual
10
EHBH/X04+08DA*V7
Daikin Altherma 3 R W
4P618951-1 – 2020.03
Routing Possible cables (depending on unit type
and installed options)
a
Low voltage
▪ Preferential power supply contact
▪ User interface used as room thermostat
(option)
▪ Power consumption digital inputs (field
supply)
▪ Outdoor ambient temperature sensor
(option)
▪ Indoor ambient temperature sensor
(option)
▪ Electrical meters (field supply)
▪ Safety thermostat (field supply)
b
High voltage power
supply
▪ Interconnection cable
▪ Normal kWh rate power supply
▪ Preferential kWh rate power supply
c
High voltage control
signal
▪ Heat pump convector (option)
▪ Room thermostat (option)
▪ Shut-off valve (field supply)
▪ Domestic hot water pump (field supply)
▪ Alarm output
▪ Changeover to external heat source
control
▪ Space cool/heat operation control
d
High voltage power
supply (factory-
mounted cable)
▪ Power supply for backup heater
CAUTION
Do NOT push or place redundant cable length in the unit.
4.5.3 To connect the main power supply
1 Connect the main power supply.
In case of normal kWh rate power supply
X2M
X1M
1 2 3
1 2 3
1 2 3
1 2 3
X1A
X11YB
X11YA X11Y
1 2 3
a
a Interconnection cable (=main power supply)
In case of preferential kWh rate power supply
Connect X11Y to X11YB.
X5M
X2M
X1M
1 2 3
1 2
N L
N L3
S1S
a
bc
X11YA
X1A
X11YB X11Y
9 10
5
1 2 3
6
a Interconnection cable (=main power supply)
b Normal kWh rate power supply
c Preferential power supply contact
2 Fix the cables with cable ties to the cable tie mountings.
INFORMATION
In case of preferential kWh rate power supply, connect
X11Y to X11YB. The necessity of separate normal kWh
rate power supply to indoor unit (b) X2M/5+6 depends on
the type of preferential kWh rate power supply.
Separate connection to the indoor unit is required:
▪ if preferential kWh rate power supply is interrupted
when active, OR
▪ if no power consumption of the indoor unit is allowed at
the preferential kWh rate power supply when active.
INFORMATION
The preferential kWh rate power supply contact is
connected to the same terminals (X5M/9+10) as the safety
thermostat. Thus, the system can have EITHER
preferential kWh rate power supply OR a safety
thermostat.
4.5.4 To connect the backup heater power
supply
CAUTION
If the indoor unit has a tank with a built‑in electrical booster
heater, use a dedicated power circuit for the backup heater
and booster heater. NEVER use a power circuit shared by
another appliance. This power circuit must be protected
with the required safety devices according to the applicable
legislation.
CAUTION
To guarantee the unit is completely earthed, always
connect the backup heater power supply and the earth
cable.
The backup heater capacity can vary, depending on the indoor unit
model. Make sure that the power supply is in accordance with the
backup heater capacity, as listed in the table below.