Daikin Altherma EKHWS150B3V3, Installation Manual

EKHWS150~3 E300B3Z2

Domestic hot water tank for air to water heat pump system

4PW54951-1

Installation manual

5

Field wiring

Power circuit and cable requirements

For cable requirements and specifications, refer to "Field wiring" in
the indoor unit installation manual supplied with the EKHBH/X unit.

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 for EKHWS*V3 and EKHWS*Z2

Connections to be made in the domestic hot water tank
electrical box

1

Refer to the wiring diagram sticker in the domestic hot water
tank switch box.

2

Make sure to ensure strain relief of the cable by correct use of
the PG nipple and PG nut (mounted on the domestic hot water
tank).

Connections to be made in the indoor unit switch box

3

Mount the prewired contactor (K3M), circuit breaker (F2B) and
terminal blocks (X3M, X4M). The contactor must be fixed with
the 2 supplied contactor screws and the terminal blocks must be
fixed with the 2x 2 supplied tapping screws.

4

Plug the connector connected to the contactor K3M in the
socket X13A on the PCB.

5

Plug the thermistor cable connector in the socket X9A on the
PCB.

6

Connect the prewired earth wires of the terminal block X3M and
X4M to the earthing screw.

7

Connect the booster heater power supply and thermal protection
cable (field supply) to terminal X4M earth, 1, 2, and X2M 13, 14.

8

Connect the booster heater power supply cable to the terminal
block X3M.

9

Fix the cables to the cable tie mountings with cable ties to
ensure strain relief.

10

Set DIP switch SS2-2 on the PCB to ON.

11

When routing out cables, make sure that these do not obstruct
mounting of the indoor unit cover.

■

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 supplied with the unit and the
instructions given below.

■

The domestic hot water tank must be earthed via the
indoor unit.

■

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
outdoor unit, indoor unit, backup heater and domestic
hot water tank.

NOTE

Select the power cable in accordance with relevant
local and national regulations.

Make sure all field wiring is insulated from the tank body
and heater element or can resist temperatures to 90°C.

Switch off the power supply before making any
connections.