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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 com-
petent 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
How to put into operation:
1. Make sure the device is filled with
water and the gas pipe to the boiler
is open.
2. Turn the temperature-control knob
fully to the right and turn the control
knob to the position ‘PILOT FLAME’
(
✸
).
3. Keep the control knob depressed
and press the piezo igniter a few
times until the pilot flame is burning
(see Fig. 8).
4. Keep the control knob (
✸
)
depressed for about 20 seconds.
When released, the pilot flame
should continue to burn. Should the
pilot flame go out, wait 5 minutes
before repeating the ignition
procedure. The size of the pilot
flame may be adjusted (see also
‘Adjusting the pilot flame’).
5. Turn the control knob to the ‘ON’
( ) position.
6. Turn the temperature-control knob
to the desired position, preferably to
position 4 (approx. 60°C). The
device will now operate
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
For a short period:
1. Turn back the control knob to ‘PILOT
FLAME’ (
✸
); the pilot flame will
continue to burn. The main burner
cannot ignite.
For a longer period:
1. Turn the control knob to ‘OFF’ (
●
);
the pilot flame will go out.
2. Shut the gas valve in the supply
pipe. In case of very long intervals,
in combination with a risk of frost, it
is recommended to also shut off the
cold-water supply and to drain the
cooled-down device by opening the
drain valve – a drain hose may be
connected to it – and opening the
nearest hot-water tap for aeration.
