OPERATION
Cleaning, care and maintenance
4.2 Recommended settings
Your instantaneous water heater offers maximum precision and
maximum convenience in DHW provision. Should you nonetheless
be operating the appliance with a thermostatic valve, we recom¬
mend that you:
► Adjust the set temperature on the appliance to over 50 °C.
Then set the required set temperature on the thermostatic
valve.
Saving energy
The following recommended settings will result in the lowest en¬
ergy consumption:
- 38 °C for hand washbasins, showers, bath
- 55 °C for kitchen sinks
Temperature limit via internal anti-scalding protection
(qualified contractor)
If required, the qualified contractor can set a permanent temper¬
ature limit, for example in nurseries, hospitals etc.
When supplying a shower, the appliance temperature setting
range must be adjusted by the qualified contractorto 55 °C or less.
Limiting it in this way prevents water from flowing out of the
appliance at temperatures which could cause injury.
Recommended setting for operation with a thermostatic valve
and preheated water
► Set the temperature at the appliance to the maximum
temperature.
Following an interruption to the water supply
Material losses
To ensure that the bare wire heating system is not dam¬
aged following an interruption to the water supply, the
appliance must be restarted taking the following steps.
► Disconnect the appliance from the power supply by
removing the fuses/tripping the MCBs.
► Open the tap for one minute until the appliance and
its upstream cold water inlet line are free of air.
► Switch the power back ON.
6. Troubleshooting
Problem Cause Remedy
The appliance will not There is no power. Check the fuses/MCBs in
start despite the DHW your fuse box/distribu-
valve being fully open. tion board.
The aerator in the tap or Clean and/or descale the
the shower head is scaled aerator or shower head,
up or soiled.
The water supply has Vent the appliance and
been interrupted. the cold water inlet line.
When hot water is being The air detector detects The appliance restarts
drawn off, cold water air in the water. It switch- automatically after
flows for a short period,
es
off the heating output 1 minute.
briefly.
The required tempera- Internal anti-scalding The internal anti-scalding
ture
cannot be set. protection is activated. protection can only be
adjusted by the qualified
contractor.
Note
Programming unit displays and selected settings are re¬
tained following a power failure.
If you cannot remedy the fault, contact your qualified contractor.
To facilitate and speed up your request, provide the number from
the type plate (000000-0000-000000).
5. Cleaning, care and maintenance
► Never use abrasive or corrosive cleaning agents. A damp
cloth is sufficient for cleaning the appliance.
► Check the taps regularly. Limescale deposits at the tap out¬
lets can be removed using commercially available descaling
agents.
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DHB-E LCD I 29
ENGLISH
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