Field Wiring - Daikin EKHWSU150B3V3 Installation Manual

Field wiring

See also "Field wiring diagram" on page 13.
A main switch or other means for disconnection,

having a contact separation in all poles, must be
incorporated in the fixed wiring in accordance with
relevant local and national legislation.
All field wiring and components must be installed by a

licensed electrician and must comply with relevant
European and national regulations.
The field wiring must be carried out in accordance

with the wiring diagram sticker supplied with the unit
and the instructions given below.
The domestic hot water tank must be earthed via the

unit.
Power circuit and cable requirements
Be sure to use a dedicated power circuit. Never use a

power circuit shared by another appliance.
Use one and same dedicated power supply for the

unit(s), backup heater and domestic hot water tank.
For cable requirements and specifications, see "Field wiring" in the
unit installation manual supplied with the unit.
NOTICE
Select the power cable in accordance with relevant local
and national regulations.
Thermistor cable
The distance between the thermistor cable and power supply cable
must always be at least 5 cm to prevent electromagnetic interference
on the thermistor cable.
Procedure
Switch off the power supply before making any
connections.
Connections to be made in the domestic hot water tank
electrical box
Make sure all field wiring is insulated from the surface of
the inspection hole or can resist temperatures to 90°C.
1 Prior to upwiring
Make sure to ensure strain relief of the power cable by correctly
mounting the PG nipple and PG nut (delivered with the tank).
EKUHWBB + EKUHW2WB + EKHWSU150-300B3V3
Domestic hot water tank with option kit for air to water heat pump
system
4P344370-1B – 2019.08
1x
2 Booster heater power supply
Connect the booster heater power
supply and thermal protection cable
as shown in wiring diagram sticker
on the inside of the switch box lid.
3 Solenoid valve power supply
Connect the solenoid valve power
supply cable as shown in the
following diagram sticker on the
inside of the switch box lid.
4 Solenoid valve
Connect the solenoid valve as
shown in the following diagram
sticker on the inside of the switch
box lid.
Connections to be made in the unit switch box
NOTICE
Only for EHBH/X:
X3M will not be installed. See figure in "For EHBH/X units
only" on page 8 for more details.
5 Mount the prewired contactor (K3M), circuit breaker (F2B) and
terminal blocks (X3M, X4M). The contactor and terminal blocks
should be fixed with the 3
6 Plug the connector connected to the contactor K3M in the socket
X13A on the PCB.
7 Plug the thermistor cable connector in the socket X9A on the
PCB.
8 Connect the prewired earth wires of the terminal block X3M and
X4M to the earthing screw.
9 Connect the booster heater power supply and thermal protection
cable (field supply) to terminal X4M earth, 1, 2, and X2M 13, 14.
10 For other models: Connect the booster heater power supply
cable to the terminal block X3M.
Only for EHBH/X: Connect the booster heater power supply
cable to the circuit breaker (F2B). The earth wire must be
connected to X4M.
11 Connect the solenoid valve power supply cable to terminal block
X7M as shown on wiring diagram B in paragraph "Connections
to be made in the domestic hot water tank electrical box" on
page 6.
12 Fix the cables to the cable tie mountings with cable ties to
ensure strain relief.
13 For other models: Set DIP switch SS2-2 on the PCB to ON.
Only for EHBH/X: Connections to the domestic hot water tank
must be enabled by installer settings on the indoor unit. Refer to
the installer reference guide.
14 When routing out cables, make sure that these do not obstruct
mounting of the unit cover.
2 screws supplied.
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Installation manual
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