Zip Varipoint III Installation, Maintenance and User Instructions - November 2010
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Maintenance
Schedule
It is recommended that all key components of the heater should be inspected
six monthly for continued safe and efficient operation. The components to be
inspected should include the following:
1
Expansion relief valve. Check correct operation.
2
Expansion vessel pressure should be checked – refer to label on vessel
for correct pressure.
3
Pressure and temperature relief valve. Check correct operation.
4
All valves should be replaced after 5 years.
Fault Finding
Fault
Possible causes
Water not heating
1 Electricity supply fault.
2 Over temperature cut-out tripped.
3 Faulty thermostat.
4 Faulty element.
Discharge from any relief valve
1 Thermostat fault.
2 Excessive mains water pressure.
3 Expansion vessel lost charge (if fitted).
4 Faulty expansion relief valve.
5 Faulty pressure reducing valve (if fitted).
To De-install the Heater
1
Switch off and disconnect the electrical supply.
2
Close the mains water supply isolating valve.
3
Disconnect the inlet and outlet water connections at the top of the unit.
4
Remove the heater.
5
Drain the unit through the hot water supply connection.
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