March / 2014 Page 15 CEX-O_CEX-U_Installation, Maintenance and User Instructions V1.02
Power limit
If the maximum power available from the appliance is
insufcient to heat the volume of hot water being drawn off
to the required temperature this will be indicated by “MAX”
on the display.
Reducing the ow rate will enable the required
temperature to be delivered.
Operation with solar systems
The appliance is suitable for use with solar heating systems
providing appropriate controls are in place to ensure that
the temperature of the water entering the unit does not
exceed 70ºC.
If the inlet temperature exceeds the set point, the “SUN”
symbol on the display indicates that the
heating power is switched off.
Maintenance and cleaning.
General cleaning
Do not use strong, corrosive spray or abrasive cleaners / chemicals.
Clean the casing, tapware, external lter, piping and all other ttings with a soft cloth and mild
soap and water.
Do not spray water over the tap as it may damage the low-voltage electronics.
Caution: Should any of the plastic ttings accidentally come into contact with cleaners with a PH
level less than 4, hypochlorite, hydrogen peroxide or any other aggressive chemical the affected
component must be replaced immediately.
Undersink units must never be located near, or cleaned with water jets. Avoid using airborne
pesticides near the undersink unit.
NOTE!
Maintenance work must only be carried out by a competent person familiar with instantaneous
water heaters.
Outlet ttings (jet regulator Fig. 5) should be unscrewed from the tap nozzle and cleaned at
regular intervals.
• Rinse the regulator with water and brush off the debris. For difcult to remove deposits,
soak in white vinegar (or a proprietary scale cleaner) for a few minutes and scrub with a
toothbrush.
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