DE GB
22
The device should be isolated from the electricity supply before any work is done on live com-
ponents.
Remove the fuses or isolate the device in another way.
The main water valve should be closed before any work is done on the water pipe.
If the water supply is interrupted, e.g. due to maintenance on the mains water supply, then the
following steps should be undertaken before returning the device to operation:
1. Remove the fuses or isolate the device in another way.
2. Open a hot water valve connected to the device until the air is vented from both the device
and the cold water supply pipe.
3. Replace the fuses or reconnect the supply.
4. Maintenance
Maintenance
This device does not require any maintenance by the user. Professional maintenance may only be
carried out by duly authorised technical staff. Maintenance, e.g. verifying electrical safety, should
only be undertaken by a qualified electrician, observing the relevant regulations (IEEE, etc.).
If faulty, never try to repair the hot water device yourself. Please contact the nearest service
specialist or the party that supplied the appliance originally.
Care
The enclosure can simply be cleaned with a damp cloth. Do not use aggressive cleaners or cleaners
with a scouring effect!
Entkalkung
A service inspection should be performed by authorized and qualified technical staff every year.
De-scaling of the device during this inspection is highly recommended, especially when you live in an
area with hard water exceeding 12°dH (German standard of hardness). Higher water temperature will
intensify calcification. It is therefore recommended to set the device at maximum 55°C (energy-saving
setting= „E“ for Hydrex in areas with extremely hard water >16°dH.
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