5 Installation
uniSTOR GB
16
5.4.5 Electrical Connections and Controls
All electrical connections conform to BS.
The position of the discharge pipes (tundish), drain
valves and motorised valves etc. shall be positioned
away from any electrical components.
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
a
b
230 V AC
3 kW
12
3
LN
2
1
2
1
3
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
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.
12
3
LN
1 7
2 10
3
To Wiring box:
1
2
