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5.2.6
Secondary return
Validity: VIH RW GB 250 BES
OR VIH RW GB 300 BES
1
T-piece for the second-
ary return (included in
the scope of delivery for
the cylinder)
2
Domestic hot water
outlet
Carry out the installation in accordance with the basic dia-
gram above.
5.3
Electrical installation
Danger!
Risk of death from electric shock!
The power supply terminals L and N are live:
▶
Switch off the power supply.
▶
Secure the power supply against being
switched back on.
Caution.
Risk of material damage by drilling
through the product.
The product may be damaged by drilling
work.
▶
Do not drill through the product.
0020221303_02 uniSTOR HP Installation and maintenance instructions
2
3
4
5
1
3
Secondary return pipe
4
Circulation pump
5
Non-return valve
1
Immersion heater
2
Immersion heater ther-
mostat
5.3.1
Optional combination of thermostats
Use the wiring diagram in the system instructions for the
installation.
5.3.2
Thermostats
1
1
3
2
4
4
70
40
60 50
1
Thermal cut-out and re-
set knob for the immer-
sion heater
2
Thermal cut-out and re-
set knob for the primary
circuit
If you are using a control from another brand, use the op-
tional cylinder thermostats.
The thermostat connections make it possible to install a con-
nection box in addition to the Vaillant control.
Installation 5
3
1
3
1
3
2
4
2
4
2
70
40
70
40
60 50
60 50
4
1
3
Primary circuit thermo-
stat
4
Retainer for the temper-
ature sensor
2
1
3
2
4
3
70
40
60 50
3
Setting the temperature
of the primary circuit
4
Immersion heater tem-
perature control
11
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