5 Installation
uniSTOR GB
16
5.4.5 Electrical Connections and Controls
All electrical connections conform to BS 7671 and 6759-1.
The position of the discharge pipes (tundish), drain
valves and motorised valves etc. shall be positioned
away from any electrical components.
Warning:
The cylinder must be earthed.
5.4.5.1 Immersion Heater
The uniSTOR VIH 125 - 310 cylinders are equipped with a
factory fitted immersion heater.
All internal wiring is factory mounted.
Warning:
The immersion heater must be earthed.
Install a separate electrical supply to the immersion
heater in accordance with the current IEE wiring
regulations (BS 7671). The immersion heater must be
wired in 3 x 2.5 mm
2
heat-resisting cable from a double
pole isolating switch. The circuit must be protected by a
13 amp fuse. The connection details for the immersion
heater are shown in fig. 9.
Fig. 9 Immersion heater electrical connections
a Cylinder Controls
1
Thermostat (adjustable)
b Immersion heater
2 Thermal cut out (with Reset button)
3 Sensor
2
1
2
a
b
1
3
230 V AC
3 kW
1
2
3
N
L
Important:
The immersion heater incorporates an energy
cut-off device and must not under any
circumstances be replaced by a standard
immersion heater.
Only a correct genuine Vaillant spare part is permitted.
All uniSTOR cylinders with a volume of 260 l or 310 l are
provided with an additional boss to fit a second
immersiom heater. The immersion heater can be ordered
as accessory (No. 0020006765)
5.4.5.2 Electrical Connections to Cylinder
Controls
Fig. 10 Electrical Connections to Cylinder Controls
Note:
In case you do not wire the immersion heater then
connect the earth wire to the terminal marked E
on the immersion heater connector block.
Warning:
The uniSTOR cylinder must be eartherd.
The Vaillant uniSTOR and accompanying Vaillant boiler
may be controlled using various programmers and room
thermostats, details of which are given in section:
Control Options.
The uniSTOR cylinder has a prefitted cylinder thermal
cut out and thermostat.
2
1
a
b
1
2
3
N
L
1 7
2 10
3
To Wiring box:
0020005468_02_GB_042008.qxd 16.04.2008 14:17 Uhr Seite 16
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