Installation 5
0020221297_05 uniSTOR Installation and maintenance instructions
11
5.2.7
Installing a secondary return
Validity:
VIH GB 250/3 BES
OR VIH GB 300/3 BES
1
2
3
4
5
1
T-piece for the second-
ary return (included in
the scope of delivery for
the cylinder)
2
Domestic hot water
outlet
3
Secondary return pipe
4
Circulation pump
5
Non-return valve
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.
70
60 50
40
70
60 50
40
1
3
2
4
1
3
2
4
1
2
3
4
1
Immersion heater
2
Immersion heater ther-
mostat
3
Primary circuit thermo-
stat
4
Retainer for the temper-
ature sensor
5.3.1
Optional combination of thermostats
Use the wiring diagram in the system instructions for the
installation.
5.3.2
Thermostats
70
60 50
40
70
60 50
40
1
3
2
4
1
3
2
4
1
2
3
4
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
3
Setting the temperature
of the primary circuit
4
Immersion heater tem-
perature control
Summary of Contents for uniSTOR VIH GB 3 BES Series
Page 23: ......
