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iNSTALLATiON
maintenance
f After 5 years, the threaded immersion heater must be re-
moved for inspection as part of the maintenance. Inspect
the threads for corrosion. Replace the threaded immersion
heater if any signs of corrosion are found. Subsequently, the
threaded immersion heater must be removed and examined
every 3 years.
f Carry out a visual inspection of the following parts:
- Valves
- External taps and fittings
- Threaded immersion heater
- Electrical connections
12.7 Replacing the combination valve
f Once the combination valve has been removed from the DHW
cylinder, it can be dismantled by unscrewing the separate
parts. The entire combination valve can be removed from the
upper connection by unscrewing it.
f Do not tighten the combination valve when refitting it. A
double o-ring provides the seal.
f To create the seal, screw the combination valve downwards
until it will not go any further. Then turn it back less than one
full turn, so that it points in the required direction.
12.8 Removing / replacing the drain valve
f Disconnect the appliance from the mains power supply at the
MCB/fuse in the distribution board.
f Drain the appliance. See chapter "Maintenance / Draining the
appliance".
f Once the DHW cylinder is fully drained, unscrew the rear
locking ring behind the drain valve. To do this, turn the lock-
ing ring clockwise.
f Pull off the drain valve.
f To reinstall the drain valve, follow all the steps in reverse
order.
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Troubleshooting
