20
Installation instructions & user manual
9120-25693 v3.00 Oct 2018 - ZIP CEX
Technical support
Tel: 0345 6 005 005 email: service@zipindustries.co.uk www.zipwater.co.uk
OPERATION
MAINTENANCE & CLEANING
When operating with preheated water (e.g. with solar
systems), ensure that the maximum inlet temperature
is not exceed.
If the inlet temperature exceeds the setpoint, the icon
on the digital display indicates that the heating
power is switched off.
Top-up heating
Unit provides no output
General cleaning
Purging after maintenance work
This instantaneous water heater features an automatic air bubble protection system to
prevent it from inadvertently running dry. Nevertheless, the appliance must be purged
of air before using it for the first time. Each time the appliance is emptied (e.g. after
work on the plumbing system, if there is a risk of frost or following repair work), the
appliance must be re-purged before it is used again.
• Disconnect the instantaneous water heater from the mains power supply.
• Unscrew the jet regulator on the outlet fitting and open the cold water tap valve to
flush out the water pipe and avoid contaminating the appliance or the jet regulator.
• Open and close the hot water tap until no more air emerges from the pipe and all air
has been eliminated from the water heater.
• Only then should you re-connect the power supply again to the instantaneous water
heater and screw the jet regulator back in.
• The appliance activates the heater after approx. 10 seconds of continuous water
flow.
• Plastic surfaces and fittings should only be wiped with a damp cloth. Do not use
abrasive or chlorine-based cleaning agents or solvents.
• For a good water supply, the outlet fittings (special tap aerators and shower heads)
should be unscrewed and cleaned at regular intervals. Periodically, the electrical
and plumbing components should be inspected by an authorised professional in
order to ensure proper functioning and operational safety at all times.
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