Daikin EKHBX030BA Installation Manual page 21

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*030BA3V3 3 kW
EKHB*030BA6V3 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
X1M X1M
L1 L1 L2 L2 L3 N
L1 L2
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 23 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 23 for more information.
EKHBH/X030BA
Indoor unit for air to water heat pump system
4PW62568-1 – 07.2010
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
X3M
Connection of the first set point and second set point contacts
The connection of the set point contact is only relevant in case dual
set point contact is enabled.
See also "Typical application examples" on page 4 and "Dual set
point control" on page 30.
Contact requirements
The contact shall be a voltage free contact that ensure 24 V
(100 mA).
Procedure
1 Connect the contact of first set point and second set point to the
appropriate terminals as shown in the figure below
X2M
SP1
1 2 3 4
SP2
SP2 SP1
2 Fix the cables with cable ties to the cable tie mountings to
ensure strain relief.
3 Depending on the required pump operation set DIP switch
SS2-3 and field setting [F-00]. See "Pump operation
configuration" on page 23 and field setting [F-00] in "[F] Option
setup" on page 34.
Connection of the valve control cables
Valve requirements
Power supply: 24 V AC
Maximum running current: 100 mA
Wiring the 2-way valve
1 Using the appropriate cable, connect the valve control cable to
the X2M terminal as shown on the wiring diagram.
Wiring is different for a NC (normal closed) valve
NOTE
and a NO (normal open) valve. Make sure to
connect to the correct terminal numbers as detailed
on the wiring diagram and illustrations below.
Normal closed (NC) 2-way valve
X2M 5 6 7
M
NC
2 Fix the cable(s) with cable ties to the cable tie mountings to
ensure strain relief.
Wiring the 3-way valve
1 Using the appropriate cable, connect the valve control cable to
the appropriate terminals as shown on the wiring diagram.
NOTE Type of 3-way valve to be connected. (Delivered
with optional domestic hot water tank)
"SPST 3-wire" type 3-way valve
The 3-way valve should be fitted as such that
when terminal ports 9 and 10 are electrified,
the domestic hot water circuit is selected.
"SPST 3-wire" valve
X2M 8 9 10
M
2 Fix the cable(s) with cable ties to the cable tie mountings to
ensure strain relief.
First set point contact
Second set point contact
Normal open (NO) 2-way valve
X2M 5 6 7
M
NO
Installation manual
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