DE-SCALE
To gain access to the internals of the water tank, the body lid must be
removed. Remove the 4 screws, break the lid gasket seal and lift it
clear of the body. A video of this procedure can be viewed under the
‘Technical Guides’ section on our website.
Note: Whenever the body lid has been removed from the boiler
a new lid gasket may be required to ensure a steam-tight joint.
Damage to the unit caused by a poor lid seal is not covered by
warranty.
Scale deposits should be removed from all internal surfaces,
particularly the heating element, thermistor and level sensors by
gently tapping or scraping. If the deposits are soft, use a nylon
pad and flush out. Abrasive cleaning materials containing scouring
powders and detergents must not be used, as such materials can
cause taste problems.
Suitable chemical de-scalants must only be used in accordance
with the manufacturer’s recommendations. This will prevent health
and safety issues, taste problems and potential damage to the
appliance. All trace of these chemicals must be removed before re-
commissioning the unit. Misuse of such chemicals is not covered by
the product warranty.
IMPORTANT Before re-commissioning the boiler it is important
that all scale and moisture is removed from the level sensors
and insulating gaskets to avoid a false signal being transmitted
through the scale. Failure to remove this scale and/or moisture
will cause the sensor to indicate to the PCB that water is covering
the element, whether or not water is present. In this situation the
PCB will energise the element causing failure. If in doubt, protect
the element by hand filling with water to the level of the draw-off
tap before switching on the electrical supply to the boiler.
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