10
Instruc
tions f
or user - 9120-34313 - DEX - 801047 - No
v
ember 2012 v1.00
10. Maintenance
Cleaning and replacing the fi lter strainer
The cold water connection of the appliance is fi tted with an integral
shut-off valve and fi lter strainer. Soiling of the strainer may reduce
hot water output from the unit.
The strainer should be cleaned or replaced as follows:
1. Isolate the electrical supply to the unit.
2. Remove the appliance cover and close the shut-off valve (see
Fig 12) in the cold water connection piece to position II.
3. Unscrew the screw plug (A) from the cold water connection
piece and take out the strainer (B) (see Fig 13).
4. The strainer can now be cleaned or replaced.
5. After re-fi tting the strainer tighten the screw plug.
6. Slowly open the shut-off valve in the cold water connection
piece to position 1.
7. Vent the unit by carefully opening and closing the hot water tap
several times until all air has been eliminated from the water
heater and no more air emerges.
8. Re-fi t the appliance cover and restore power to the unit.
Fig 13
Fig 12
N.B. Maintenance work must only be carried out by a qualifi ed tradesperson familiar with instantaneous water heaters.
Plastic surfaces and sanitary fi ttings should only be wiped with a damp cloth.
Never use abrasive or chloric cleaning agents or solvents.
Outlet fi ttings (tap nozzles and shower heads) should be unscrewed and cleaned at regular intervals.
The electrical and plumbing components should be inspected regularly by a competent person to ensure proper functioning and opera-
tional safety. Water quality should be considered when determining the frequency of inspection.
Each time the appliance is emptied (e.g. due to work on the plumbing system, if there is a risk of freezing or in case of maintenance), the
appliance must be vented by opening and closing the hot water tap until all air has been eliminated from the water heater and no more
air emerges before re-connecting to the electrical supply.
