Ensure the discharge pipe can cope with this flow rate continuously. Release the Temperature and Pressure
relief valve. The flow should stop completely.
Open the expansion relief valve and likewise check that water flows freely through the discharge pipe, that
the discharge pipe can cope with the flow rate and that the water flow ceases when the valve is released.
Switch on the electrical supply and select an appropriate heater setting on the thermostat knob
(the thermostat is adjustable in the approximate range 20°C to 65°C.
The neon indicator light comes on when the element is heating.
4. Operation
This water heater will store water at a temperature selected via the thermostat on the front of the heater.
To set the temperature turn the control clockwise to increase the temperature and anti-clockwise to decrease
it. The indicator light comes on when the unit is heating.
Maximum energy efficiency and product life is obtained avoiding very high temperature settings. The optimal
temperature setting balances these factors.
The maximum temperature settings is about 65 degrees, this can be excessively hot for some
situations. In situations where very young children, the elderly or other vulnerable people are
likely users a suitable thermostatic mixing valve should be fitted by your installer.
If there is any risk of frost the heater should be left switched on at it lowest heat setting. If the heater is to be
left unused for long periods, it should be drained.
This unit should be maintained in accordance with the instruction in the sections 12-16.
Never interfere with any safety valves.
Beware that hot water discharged from safety valves could be very hot.
5. Maintenance
Draining the unit
To drain the unit disconnect electrical supply and close service valve on cold inlet.
Open the drain cock on cold inlet and open a hot water outlet to enable air to replace draining water.
Note that a small quantity of water will remain in the tank. This residual water can be drained
by removing the heating element.
Electrical components
Always switch the electrical supply off before undertaking any maintence to the heater unit.
Servicing of electrial parts should only be undertaken by competent individuals.
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