Field Wiring Guidelines; Connection Of The Indoor Unit Power Supply And Communication Cable; Connection Of The Thermostat Cable - Daikin EKHBH054BA Manuel D'installation

Field wiring guidelines

Most field wiring on the indoor unit side is to be made on the
terminal block inside the switch box. To gain access to the
terminal block, remove the indoor unit cover and switch box
service panel, see "Opening the indoor unit" on page 9.
WARNING
Switch off all power supply – i.e. outdoor unit power
supply and backup heater and domestic hot water
tank power supply (if applicable) – before removing
the switch box service panel.
Cable tie mountings are provided at the bottom of the switch
box. Fix all cables using cable ties (field supply).
A dedicated power circuit is required for the backup heater.
Installations equipped with a domestic hot water tank (optional),
require a dedicated power circuit for the booster heater.
Please refer to the domestic hot water tank installation manual.
Connection of the indoor unit power supply and
communication cable
Power circuit and cable requirements
Power supply for the indoor unit is to be provided through the outdoor
unit. Data communication with the outdoor unit is provided through
the same cable.
For all guidelines and specifications regarding field wiring between
the indoor unit and the outdoor unit, please refer to the outdoor unit
installation manual.
Procedure
1 Using the appropriate cable, connect the power circuit to the
appropriate terminals as shown on the wiring diagram and the
illustration below.
2 Connect the ground conductor (yellow/green) to the grounding
screw on the switch box mounting plate.
3 Fix the cable with cable ties to the cable tie mountings to ensure
strain relief.
4 When routing out cables, make sure that these do not obstruct
mounting of the indoor unit cover, see figure 3.
Note: only relevant field wiring is shown.
X1M
1 2 3
1 2 3
1 2 3
Installation manual
18
X3M
Connection of the backup heater power supply
Power circuit and cable requirements
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 local laws and regulations.
Select the power cable in accordance with relevant local laws and
regulations. For the maximum running current of the backup heater,
refer to the table below.
Backup
heater
Indoor unit model capacity
EKHB*054BA3V3 3 kW
EKHB*054BA6V3 6 kW
Procedure
1 Using the appropriate cable, connect the power circuit to the
main circuit breaker as shown on the wiring diagram and the
illustration below.
2 Connect the ground conductor (yellow/green) to the grounding
screw on the X1M terminal.
3 Fix the cable with cable ties to the cable tie mountings to ensure
strain relief.
Note: only relevant field wiring is shown.
1x 230 V
L1

Connection of the thermostat cable

Connection of the thermostat cable depends on the application.
See also "Typical application examples" on page 4 and "Room
thermostat installation configuration" on page 22 for more information
and configuration options on pump operation in combination with a
room thermostat.
Thermostat requirements
Power supply: battery operated
Contact voltage: 24 V.
Procedure
1 Connect the thermostat cable to the appropriate terminals as
shown on the wiring diagram and installation manual of the room
thermostat kit.
2 Fix the cable with cable ties to the cable tie mountings to ensure
strain relief.
3 Set DIP switch SS2-3 on the PCB to ON. See "Room thermostat
installation configuration" on page 22 for more information.
Indoor unit for air to water heat pump system
Backup
heater Maximum
nominal Minimum overcurrent
voltage circuit amps protection
1x 230 V 14.3 A 20 A
1x 230 V 28.6 A 30 A
X1M X1M
X3M
L1 L1 L2 L2 L3 N
L2
EKHBH/X054BA
4PW54216-1