
IS399 ECN3290 10
SCALE
The formation of scale within a hot water system is common and if left unchecked may cause
problems to the functioning of the appliance. In hard water areas scale formation builds up quicker
than in softer water areas therefore checks on scale formation need to be more frequent. It is
advisable, in order to prevent injury, the appliance be isolated and allowed to cool before inspecting
for scale deposits within the tank.
DE-SCALING THE APPLIANCE
It is recommended that the appliance be de-scaled regularly using an approved de-scaling
compound. Excessive scale deposits may become difficult to remove with some de-scaling
products.
Do not use hydrochloric acid based de-scaling compounds on stainless steel.
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To de-scale the appliance, isolate the appliance from the electricity supply.
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Fill with water to the indicated level.
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Turn on the electricity supply and heat the water to boiling then turn the thermostat off.
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Add the de-scaling compound a little at a time, allow the frothing to subside then set the unit on
full. Some de-scaling compounds may cause hot water to erupt. It is advisable to follow the
instructions of the manufacturers.
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Allow the appliance to heat for up to 30 minutes, then allow the water to cool.
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In the case of severe scale deposits it may be necessary to repeat the de-scaling process.
On completion of successful de-scaling isolate from the supply, evacuate the tank via the drain tap
then rinse with clean water.
DRAINING THE WATER
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Turn the unit off and isolate from the power supply.
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Allow the water to cool to a maximum of 55°C.
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Open the tap and allow the water to drain.
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Open the water control valve to allow you to swirl water around the tank to assist rinsing debris
through the tank.
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Close the tap to the safe locked position (see diagram below).
CLEANING THE TANKS
Food debris can be a health risk, ensure that food debris is cleaned from the unit after use.
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Remove any debris from the bottom of the tank.
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Wash the tanks, top surface of the body, basket drainer, overflow cover, basket support and
pan support with a warm detergent solution.
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Rinse out the tank flushing any traces of detergent into the drain.
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Close the drain taps into the safe locked position (see “Draining the water”).
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Replace the basket drainer, overflow cover, batter plate and pan support.
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Refill the tank with fresh water.