Field Wiring - Daikin EKHWS050B3VJU Manuel D'installation

13 Connect the pressure relief valve (field supply, opening pressure
maximum 145 psi (10 bar)) and drain.
CAUTION
If a discharge pipe is connected to the pressure relief
device it must be installed in a continuously downward
direction and in a frost-free environment. It must be left
open to the atmosphere.

Field wiring

CAUTION
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 laws and regulations.
All field wiring and components must be installed by a
licensed electrician and must comply with relevant
local laws and 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 grounded via
the indoor unit.
Be sure to use a dedicated power supply. Never use a
power supply shared by another appliance.
Make sure all field wiring is insulated from the tank
body and heater element or can resist temperatures
to 194°F (90°C).
Select the power cable in accordance with relevant
local laws and regulations.
Be sure to install the required fuse or circuit breaker.
For cable requirements and specifications, refer to "Field wiring" in
the indoor unit installation manual supplied with the EKHBX unit.
Thermistor cable
The distance between the thermistor cable and power supply cable
must always be at least 2 inch (5 cm) to prevent electromagnetic
interference on the thermistor cable.
DANGER
Switch off all relevant power supply (outdoor unit, backup
heater, booster heater) before changing the connector.
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.
EKHWS050+080B3VJU
Domestic hot water tank for air to water heat pump system
4PW56114-1
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).
4
3
2
1
Cable entry:
1 Power supply booster heater (X6M)
2 Power supply to EKSOLHW* pump (X8M, grounding, 1-2)
3 Power supply from EKHBH/X or EBLQ, EBHQ, EDLQ, EDHQ
for EKSOLHW* (X8M, grounding, 1-2)
4 Thermal protector (Q3L, 3-4)
The power supply cable towards the booster heater
X4M→X6M and the cable towards the thermal protector
X2M (13-14)→Q3L (4-3) are separated. However, if
allowed according to local laws and regulations, these 2
cables can be combined in 1 cable (5 wires).
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 ground wires of the terminal block X3M
and X4M to the grounding screw.
7 Connect the booster heater power supply and thermal protection
cable (field supply) to terminal X4M ground, 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.
Installation manual
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