Vaillant uniSTOR - Electric Immersion Heater; Wiring; Combination of Unistor Domestic Hot Water Cylinder and Controllers

Installation and maintenance instructions for uniSTOR 0020111105_00 11
3.1.3 Electric immersion heater
1
2
3
4
5
1
2
3
Fig. 3.4 Electric immersion heater operating elements
Key
1 Electric immersion heater temperature controller
2 Electric immersion heater TCO reset button
3 Electric immersion heater
The cylinder is equipped with an additional electric
immersion heater (3) with a heating output of 3 kW. The
electric immersion heater is located behind the top front
cladding. The electric immersion heater is designed for
use in unvented cylinders and has a thermostat with a
temperature controller (1) and a thermal cut-out (TCO)
with a reset button (2).
i
If you need to make a replacement, you must
use the correct electric immersion heater with a
thermal cut-out for overheating protection. The
seal of the electric immersion heater must also
always be replaced. Use only original replace-
ment parts from VaillantLtd.
i
Inspection access to the cylinder is available
through the immersion heater boss.
Setting the hot water temperature
You can set the hot water temperature by pointing the
arrow on the temperature controller (1) of the electric
immersion heater to a number between 1 and 5. The fol-
lowing table contains the approximate hot water temper-
ature for each of the five settings.
Setting Hot water temperature
1 20 °C
2 35 °C
3 45 °C
4 60 °C
5 68 °C
Table 3.1 Setting the hot water temperature
3.1.4 Hot water temperature regulation
You can control the hot water temperature using a
Vaillant dual-channel eBUS controller or a separate
hot water controller.
a
Danger!
Risk of burns and scalds!
Water at a temperature of more than 60 ºC
can escape from the water draw-off point.
> Install a hot water thermostat mixer in
the hot water pipe to provide effective
scald protection.
> Set the hot water thermostat mixer to
less than 60 ºC and check the tempera-
ture at a hot water draw-off point.
3.1.5 Wiring
If you are using an eBUS-compatible Vaillant gas-fired
wall-hung boiler, you can use the Vaillant Control Center
VR65 or the Vaillant VR61 mixer module for the system
cabling.
If you are using a non-eBUS-compatible Vaillant gas-
fired wall-hung boiler or a third-party boiler, you can
use a standard cabling box.
3.1.6 Combination of uniSTOR domestic hot water
cylinder and controllers
The following controllers can be used to regulate hot
water production:
Vaillant dual-channel eBUS controller, VR 65, VR 61,
or a timer (from a third-party manufacturer).
If you are using an eBUS-compatible Vaillant gas-fired
wall-hung boiler, you can control the heating using a pro-
grammable Vaillant VRT room thermostat or a VRC
weather compensator.
If you are using a non-eBUS-compatible Vaillant gas-
fired wall-hung boiler or a third-party boiler, you can use
a Vaillant VRT 30 room thermostat or one of the room
thermostats commonly available on the market.
Description of the unit 3