EKHWS150~300A3V3 + EKHWS200+300A3Z2
Domestic hot water tank for air to water heat pump system
4PW42336-1
Installation manual
3
Safety devices
■
Thermal protector — The booster heater in the domestic hot
water tank is equipped with a thermal protector. The thermal
protector is activated when the temperature becomes too high.
When activated, the protector has to be reset on the domestic
hot water tank by pressing the red button (for access, remove
the electrical box lid).
■
Pressure relief valve — A pressure relief valve (field supply) in
accordance with relevant local and national regulations, and with
an opening pressure of maximum 10 bar must be connected to
the pressure relief valve connection.
■
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.
Outlook diagram
Outlook diagram, see figure 2.
Installation guidelines
Keep in mind the following guidelines when installing the domestic
hot water tank:
■
The installation location is frost-free.
■
Make sure to make the piping in size 1" or more (and reduce to
3/4" at the inlet of the tank) as to have sufficient water volume in
the piping between indoor unit and domestic hot water tank.
■
Locate the domestic hot water tank in a suitable position to
facilitate ease of maintenance; remember access is required to
the electrical box. Refer to the grey-coloured zones indicated in
figure 2.
■
Provide a connection for the pressure relief valve blow-off and
drain.
■
To avoid back siphonage it is advised to install a non-return
valve on the water inlet of the domestic hot water tank in
accordance with local and national regulations.
■
Take care that in the event of a leak, water can not cause any
damage to the installation space and surroundings.
■
The domestic hot water tank model
EKHWS(U)150A3V3 can be floor or wall
mounted. In case of wall mounting, wall
mounting kit EKWBSWW150 is required
(separate ordering).
Installing the domestic hot water tank
1
Check if all domestic hot water tank accessories (see
"Accessories" on page 1) are enclosed.
2
When floor mounting, place the domestic hot water tank on a
level surface. When wall mounting (only for EKHWS(U)150A3V3
model), make sure the wall is sturdy. In both cases, make sure
the domestic hot water tank is mounted level.
3
Apply thermal paste to the thermistor and insert the thermistor
as deep as possible in the thermistor socket. Fix using the nut
provided.
Connecting the water circuits
Refer to the chapter "Typical application examples" described in the
installation manual delivered with the indoor unit for details on
connecting the water circuits and the motorised 3-way valve.
1
Connect the water inlet and water outlet.
2
Connect the hot and cold water supply tubes.
3
Connect the pressure relief valve (field supply, opening pressure
maximum 10 bar) and drain.
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.
■
The domestic hot water tank relief valve connections
may not be used for other purpose.
■
Do not install heaters without thermal cut-outs.
The electrical box lid must only be opened by a
licensed electrician.
Switch off the power supply before opening the
electrical box lid.
1
Hot water and pressure relief valve connection
2
Recirculation hole
3
Flow inlet connection from the main indoor unit
4
Return outlet connection to the main indoor unit
5
Cold water connection
6
Domestic hot water tank electrical box cable entry
7
Thermistor socket
8
Threaded thermistor hole for use with solar kit option. See
Installation manual EKSOLHWAV1.
9
Domestic hot water tank electrical box cable entry for use with
optional solar kit
Domestic hot water tank model H1 H2 H3 H4
EKHWS150A3V3
900 475 185 605
EKHWS200A3V3/Z2
1150 630 200 830
EKHWS300A3V3/Z2
1600 630 200 830
NOTE
To install adequate connections between the indoor
unit and the domestic hot water tank, it is important
that the 3-way valve is fitted correctly.
■
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.
