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3. FOR THE USER
3.1 Commissioning
Warning
Installing and commissioning (for the
first time) of this water heater should
only be carried out by a qualified
competent heating engineer.
3.1.1 Filling the water heater
1. Close the drain tap.
2. Open the cold water tap to the water
heater and open all taps where hot
water can be drained for de-
aeration. The water heater is filled
as soon as cold water flows from all
taps.
3. Close all hot water drain taps.
3.1.2 Putting into operation
1. Check whether the device has been
filled with water and whether the
gas supply to the water heater is
open.
2. Turn the temperature control knob
clockwise and place the control knob
in the ‘PILOT’-position ().
3. Remove the outer and inner door of
the combustion chamber.
4. Keep the control button pushed-in
and press the piezo-ignitor several
times until the pilot burns (see Figure
6).
5. Keep the control button () pushed-
in for approximately 20 seconds.
After releasing the button the pilot
should remain burning. If the pilot
extinguishes you should wait 5
minutes before repeating the ignition
procedure.
6. Subsequently remount the inner and
outer door; see “Mounting the inside
door”.
7. Turn the control button to the ‘ON’
(
) position.
8. Place the temperature control button
in the correct position, preferably
position 4 (approximately 60°C). The
appliance will now operate fully
automatically.
3.1.3 Use
The appliance is under water supply
pressure (with a maximum of 8 bar).
The amount of cold water that is added
is equal to the amount of hot water
used. The gas control block
automatically regulates the gas supply.
The main burner will ignite as soon as a
reduction in water temperature is
sensed by the control thermostat. The
main burner will shut down as soon as
the water temperature returns to the
preset temperature.
Position 1 = approximately 30°C
Position 2 = approximately 40°C
Position 3 = approximately 50°C
Position 4 = approximately 60°C
Position 5 = approximately 70°C
Higher water temperatures will cause
more scale build up in the appliance. It is
for this reason that it is recommended to
place the temperature control knob in
position 4 as the accumulation of scale
will be reduced at lower temperatures.
In addition a safety thermostat has been
fitted. This thermostat completely shuts
off the gas supply if the water
temperature reaches 82°C, also
extinguishing the pilot burner.
3.1.4 Putting out of operation
1. For short periods of time the control
knob should be turned to (); the
pilot keeps burning.
2. For longer periods of time the knob
should be turned to the (
) position;
the pilot is extinguished.
3. Close the gas tap in the supply pipe.
In case of longer interruptions or in
the event of risk of frost it is
recommended to also close the cold
water tap and to drain the appliance
after cooling (open the drain tap; it is
possible to connect a drain hose to
the drain tap; open the nearest hot
water drain point to prevent
airlocks).
To be able to drain the appliance
completely it should be disconnected
23


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