3. FOR THE USER
3.1Commisioning
Warning
Installing and commissioning of this wa- ter heater should only be carried out by a qualified competent heating engineer.
3.1.1Filling 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 taps.
3.1.2Putting into operation
1.Check to see if the heater is filled with water by running a little to waste from a hot water tap connected to the heater;
2.Check wether the ON/OFF switch is in
3.Ensure gas supply is fully purged of air and turn on gas cock;
4.Ensure that power has been correctly supplied to the unit. Use a voltage tester to check that the live is to “L” and neutral to “N”. (Flame detection is phase sensitive);
5.When first starting, the controller can be in the lock out condition: depress the reset button to free the control. (After manual reset, an extended prepurge/waiting time will occur);
6.Switch the ON/OFF switch into ON position. If the pilot fails to ignite within 25 seconds the controls will go to lock out and the reset button will need to be reset (wait 15 seconds before attempting reset). It may be necessary to repeat the lighting sequence a number of times on the initial light up if all the air has not been purged from the gas supply;
7.The main burner pressure has been factory set but should be checked once normal operation is established (see ‘Ratings’ for settings);
8.Set the temperature regulator to the required setting (see ‘De- scalcification’).
3.1.3 Use
The appliance is under water supply pressure (maximum 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 sended by the thermostat. The main burner will shut down as soon as the preset temperature is achieved.
At high water temperatures there is more scale buildup in the appliance. It is for this reason that it is recommended to place the temperature control knob in position of 60 °C as the accumulation of scale will be reduced.
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