Vaillant auroTHERM VFK 900, Start-Up, Maintenance And Troubleshooting Manual

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Manual - Solar hot water systems 0020009607_02 40
tundish
300 mm
minimum
discharge pipe
metal hopper
head
Fig. 5.18 High discharge connection
5.8 Electrical installation
Wiring should be performed by a qualified specialist in
accordance with the building regulations, Part P of the
current IEE regulations and further applicable
regulations and directives.
Commercial standard lines should be used for wiring.
- Minimum cross-section of the wires: 0.75 mm
2
The following line lengths may not be exceeded:
- Bus wires: 300m
230 V connection lines and bus wires should be laid
separately if they are longer than 10 m.
The discharge pipes of the tundish, drain valves,
motorised valves etc. should be laid at a distance to
electrical components.
e Danger!
Danger of death from electric shock!
You must earth the solar cylinder for potential
equalisation.
5.8.1 Immersion heater
The auroSTOR VIH S GB 200 - 300 S solar cylinders
have been equipped with an immersion heater by the
manufacturer.
1
2
4
5
3
230 V AC
3 kW
1
2
3
N
L
Fig. 5.19 Electrical connection of the immersion heater
Key
1 Immersion heater thermal cut out with reset button
2 Cylinder
thermostat (adjustable)
3 Temperature sensors in immersion sleeves
4 Cylinder thermostat thermal cut out with reset button
5 Immersion heater thermostat (adjustable)
e Danger!
Danger of death from electric shock!
You must earth the immersion heater for
potential equalisation.
• Install a separate electrical power supply line for the
immersion heater in accordance with current IEE
regulations (BS 7671).
You must lay a heat-resistant line (3 x 2.5 mm2) from a
double pole isolating switch for the immersion heater.
The circuit must be protected by a 13 A fuse.
The connection of the immersion heater is illustrated in
detail in Fig. 5.19.
5 Installation