To Connect The Electrical Wiring On The Indoor Unit; To Connect The Main Power Supply - Daikin ERHQ-BW1 Installer's Reference Manual

7 Installation
7.4.2 To connect the electrical wiring on the
indoor unit
1 To open the indoor unit, see To open the indoor unit.
2 Wiring should enter the unit from the top:
a b+c
Routing Possible cables (depending on unit type and installed options)
a
Low voltage
b
High voltage power supply
c
High voltage control signal
3 Routing of the wiring inside the unit should be as follows:
a b+c
4 Fix the cable with cable ties to the cable tie mountings to ensure
strain relief and to make sure that it does NOT come in contact
with the piping and sharp edges.
CAUTION
Do NOT push or place redundant cable length in the unit.
Installer reference guide
25
User interface
Power consumption digital inputs (field supply)
Outdoor ambient temperature sensor (option)
Indoor ambient temperature sensor (option)
Electrical meters (field supply)
Interconnection cable
Normal kWh rate power supply
Preferential kWh rate power supply
Power supply for backup heater
Power supply for bottom plate heater (option)
Preferential power supply contact
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

7.4.3 To connect the main power supply

1 Connect the main power supply.
In case of normal kWh rate power supply
X5M
X2M
X6Y
X6YA
X1M
1 2 3
1 2 3
X1A X19A
X6YB
30 31
a
EHVH/X16
Daikin Altherma - Low Temperature Split
4P313777-1 – 2012.05