Vaillant uniSTOR - Electrical Installation

20 Installation and maintenance instructions for uniSTOR 0020111105_00
5.5 Electrical installation
e
Danger!
Risk of death from electric shock!
Improperly executed electrical connections
can impair the operational safety of the
unit.
> The electrical installation may only be
performed by a competent person appro-
ved at the time by the Health and Safety
Executive.
e
Danger!
Risk of death from electric shock!
If the appliance is not earthed, life-threat-
ening voltage can reach the piping and
water draw-off points.
> The appliance must be earthed.
Wiring should be installed by a qualified, competent per-
son in accordance with the building regulations, Part P
of the current IEE regulations, and all other applicable
regulations and directives.
You can use standard commercial cables for the wiring:
– Minimum cross-section of conductors: 1.5mm
2
– Maximum length of bus cables: 300m
230 V supply lines and bus cables must be laid sepa-
rately above lengths of 10 m.
i
The discharge pipes of the tundish, drain valves
and motorised valves, etc. must be laid at a dis-
tance from electrical components.
5.5.1 Electrical connection of control components
1
2
3
4
5
3
1
2
4
5
8
6
2
7
Fig. 5.7 Cylinder temperature control
Key
1 Electric immersion heater cover
2 Primary heating circuit immersion sleeve (NTC)
3 Cover cap for reset button for reheating circuit TCO
4 Primary heating circuit temperature controller
5 Casing
6 Primary heating circuit thermal cut-out
7 Cylinder thermostat
8 Electric immersion heater
5 Installation