6
Operating instructions for uniSTOR 0020111106_00
3
Description of the unit
The Vaillant uniSTOR domestic hot water cylinder is
available in six sizes: 120, 155, 180, 210, 260 or 310 litres
and meets the requirements of EN 12897:2006. The cyl-
inder is made from stainless steel and is insulated with
EPS with heat radiation absorbers.
The unvented domestic hot water cylinder works with
the pressure of the water supply line and does not need
a cold water tank for its supply. To enable the cylinder
to work as well as possible, a cold water supply with an
appropriate pressure and flow rate is required.
3.1.1 Safety
devices
The cylinder is delivered with all safety and control
devices for the operation of the unvented domestic
hot water supply system:
– Temperature/pressure relief valve (90 ºC, 7 bar)
– Pressure reducing valve (3.5 bar) with line strainer
– Expansion relief valve (one-way valve, 6.0 bar)
– Thermal cut-out for electric immersion heater
– Primary heating circuit thermal cut-out.
3.1.2
Hot water temperature regulation
You can set the hot water temperature and primary
heating times on the controller. One of the following
controllers may be used depending on the design of
your system:
Vaillant dual-channel eBUS controller
Cylinder thermostat in conjunction with a timer.
Observe the operating instructions for the installed con-
troller or timer.
Electric immersion heater
The cylinder is equipped with an additional electric
immersion heater with a heating output of 3 kW.
The electric immersion heater is designed for use in
unvented cylinders and has a thermostat with a temper-
ature controller and a thermal cut-out (TCO) with a reset
button.
3.1.3
Functional elements of cylinder
3
4
2
1
Fig. 3.1 Functional elements of cylinder
Key
1 Front
cladding
2 Cylinder
thermostat
3 Thermal
cut-out
4 Electric immersion heater
The following are premounted at the factory for the
uniSTOR domestic hot water cylinder:
– Cylinder thermostat (
4
) and primary heating circuit ther-
mal cut-out (
3
)
– Electric immersion heater (
2
) with thermal cut-out and
cylinder thermostat
3 Description of the unit
