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3. FOR THE USER
3.1. Instructions for use
Installation and commissioning of the water heater
should only be undertaken by a registered installer.
3.1.2 Filling the water heater
1. Assemble the drain-off tap and ensure it is closed;
2. Open the cold water tap to the water heater and open
all taps on hot water drain-off points to vent them.
Theheater is filled as soon as cold water pours out of
all drain-off points;
3. Close all taps at hot water drain-off points. The
heater is now under water supply pressure. At this
pressure, the relief valve if fitted may not release
water.
3.1.3 Turning the water heater on
1. Check that the water heater is filled with water and
that the gas pipe to the water heater is open;
2. Turn the temperature control knob fully to the leftl;
3. Turn on( the supply voltage by turning the main
switch. NOTE: if the frost-thermostat has been
turned on, the burner automation will immediately
start its ignition procedure);
4. Turn the ‘I/O’-switch on the column in the ‘T’ position.
The control lamp in the switch will now light;
5. Turn the temperature control switch in the desired
position, preferably position 3 (approximately 60°C).
The ventilation fan will start. the water heater will
ignite and work automatically.
3.2 Usage
The water temperature is controlled via the
temperature regulator. If the temperature in the water
heater falls below the set value, the temperature
regulator call for heat. The burner automation will
operate firstly the ventilation fan for its purge cycle, then
a spark will ignite the pilot burner. The softlite control
then ignites the main burner.
The temperature is indicated by the position of the
temperature dial:
Position 1 = app. 40°C
Position 2 = app. 50°C
Position 3 = app. 60°C
Position 4 = app. 70°C
At high temperatures, more calcium precipitation is
caused in the water heater. Moreover, the standby-
losses of the water heater are greater at higher
temperatures. It is recommended that the control-
thermostat be set at approximately 60°C. For reasons of
security, the water heater is provided with a high limit
and safety thermostats. If the high limit thermostat
operates, the burner will not fire until the water has
cooled sufficiently to allow the thermostat to
automatically reset. The water heater will then return to
the control of the temperature regulator.
If the safety thermostat operates due to high
temperature the ignition sequence must be repeated
after resetting the control.
3.3 Turning the water heater off
For short periods:
1. Turn the temperature knob fully to the left and turn
the ‘I/O’-switch in the ‘O’-position.
For longer periods:
1. Switch off the supply voltage;
2. Close the gas tap in the supply line;
3. Close the water supply tap;
4. If there is danger of frost, drain the water heater.
3.4. Maintenance
The water heater must be checked and cleaned
regularly (at least once a year) by an accredited installer,
so that proper operation is guaranteed. The bar burners,
the pilot burner and the control and safety valves must
also be checked.