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ATC Electrical & Mechanical,
ATC House, Broomhill Drive, Tallaght, D24 EF99, Ireland
IE: 01 4678301, UK:0203 564 9164, Email [email protected]
opening the service valve, open the service valve until constant water flows from the hot
outlet. Once water is flowing, close the hot water tap. Failure to carry out this step can
crack the lining of the heater and result in leaks.
To start the heating cycle:
Make sure tank is full of water, otherwise damage to the water heater may occur.
For the 10 and 15 Litre heaters turn the switch on and then follow the 5Ltr instruction
below.
For the 5 Litre heater, turn the temperature adjustment knob clockwise to 3/4 maximum
and the indicator light will come on to show the element is heating. The indicator light will
remain on until the temperature setting has been reached, at which point the light will go off.
When the temperature drops below the set point of the thermostat the indicator light
will automatically come back on. This is a “pilot light” indicating the unit is in the heating
process.
To Set the Temperature.
After the water heater has reached the set point outlined above check the water tempera-
ture
—
do not place hands directly under water outlet as there could be a risk of scalding.
If it is necessary to adjust thermostat turn the dial clockwise to increase the temperature
and anti-clockwise to decrease it.
PERIODIC MAINTENANCE AND PARTS REPLACEMENT
Maintenance should only be carried out by a qualified service person.
Note: For most of these operations the power supply should be turned off and the water
will have to be drained from the heater.
Draining the Heater
1. Isolate the power supply.
2. Shut off water inlet valve.
3. Remove water heater and invert over a sink to allow water to drain from tank safely.
Removing the Heating Element
1. Turn off power supply and drain the heater (see previous section).
2. Remove the cover screw and cover.
3. Disconnect electrical cables attached to element.
4. Unscrew the heating element retaining nuts and remove compression bracket.
5. Remove the element.
De-scaling the Heating Element
Scale deposits can dramatically affect the heating efficiency of the element. Heavy scale
can even cause the element to burn out. The element can be descaled either chemically
or manually:
1. Remove heating element (see previous section)
2. Soak the element in white vinegar or other descaling solution. Once descaled, rinse