Installation and maintenance instructions for uniSTOR 0020111105_00
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4
Fig. 5.8 Cylinder thermostat and thermal cut-out (TCO) for
reheating circuit
Key
1 Cylinder
thermostat
2 Cylinder thermostat protective earth terminal
3 Cylinder thermostat terminal 1
4 Primary heating circuit TCO protective earth terminal
5 Primary heating circuit TCO C terminal
6 Primary heating circuit TCO reset button
7 Primary heating circuit thermal cut-out (TCO)
i
Before wiring the control components, dismantle
the casing (
5
) (
¬ fig. 5.7
) to facilitate work on
the components. When reinstalling the casing,
use the cutouts in the casings for routing the
cables.
5.5.2 Connecting up the electric immersion heater
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2
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5
5
4
2
3
1
Fig. 5.9 Electrical connection of electric immersion heater
Key
1 Protective earth terminal (PE)
2 Cable
grip
3 Electric immersion heater
4 Neutral conductor terminal (N)
5 Outer conductor terminal (L)
e
Danger!
Risk of death from electric shock!
Without potential equalisation, life-threat-
ening voltage can reach the piping and
water draw-off points.
>
Earth the electric immersion heater.
b
Caution!
Corrosion and short circuits can occur
due to incorrect earthing!
If you insert an immersion heater into the
cylinder, the external voltage may build up
electrical potential in the water which can
result in the electrochemical corrosion of
the immersion heater.
>
Make sure that both the hot water and
cold mains inlets are connected to the
earth line by means of an earth cable
directly on the cylinder.
>
You must also make sure that the immer-
sion heater is connected to the earth line
via the earthing terminal.
Installation 5
