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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 ush out. Abrasive cleaning materials containing scouring
powders and detergents must not be used, 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 from
the appliance 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 sensor
insulating gaskets, to avoid a false signal being transmitted
through the scale to the boiler body. Failure to remove this
scale and/or moisture could cause the sensor to indicate to
the PCB that water is covering the elements, whether or not
water is present. In this situation the PCB could energise
the elements causing failure. The elements are tted with a
none-resettable thermal cut-out, which will trip if an element
is energized in air. In this case the boiler should be switched
off, allowed to cool completely and the level sensors cleaned
thoroughly as stated above, before replacing elements and
switching the boiler back on. If in doubt, protect the elements
by hand lling with water to the level of the draw-off tap before
switching on the electrical supply to the boiler.
SERVICE INSTRUCTIONS CONTINUED
General function
The printed circuit board (PCB) controls the heating and lling
functions of the boiler by monitoring the thermistor and level
sensors. The PCB also controls the external light unit to indicate
the current state of the boiler. Red and yellow LED’S on the circuit
board indicate whether the PCB has energised the element or
solenoid respectively.
Should an element fail and need to be replaced, it may be
necessary to replace the lid gasket to ensure a reliable steam-
seal.
Note: the elements have a permanent ‘Live’ feed, and the
‘Neutral’ is switched.
Printed Circuit Board (PCB) replacement
In the event of a PCB failing and a replacement being required, full
instructions will be supplied. It is important to note however, that the
Triac device must be securely mounted against the copper heat-sink
to ensure reliable heat dissipation. Heat transfer compound is also
supplied with all replacement circuit boards.
Adjusting the Water Temperature Set Point
The temperature potentiometer (Pot) is pre-set at Calomax and
will only require adjustment in exceptional circumstances. Contact
Calomax for advice.
Water boils at different temperatures depending on barometric
pressure. The temperature should not be tuned higher than 98
°C
, or
over boiling may occur during low barometric pressure conditions,
causing steam to be ejected from the over ow pipe.
