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AP3/05, AP3/10, AP3/15 Installation Instructions
Schedule
It is recommended that all key components of the heater should be inspected
on a regular basis, no greater than twelve monthly intervals, for continued safe
and efficient operation. The inspection should be carried out by a competent
person familiar with unvented systems and the components to be inspected
should include the following:
1. Sacrificial anode. The condition of the anode should be checked regularly
by an authorised Zip service provider as part of the preventive maintenance
programme and to ensure its effectiveness in protecting the vessel and
element from corrosion.
To check the condition of the anode visually through the flange opening first
remove the thermostat temperature probe and disconnect the electrical
wires to the element before unscrewing the element assembly and
removing it.
If the anode is badly corroded it should be replaced after removing it by
grasping with long tongs or other suitable tool through the flange opening
while unscrewing the securing nut on top of the vessel.
2. Expansion relief valve. Check correct operation.
3. T&P relief valve, if fitted. Check for correct operation.
4. Expansion vessel, if fitted. Check pressure – refer to label on vessel for
correct pressure.
5. Integral line strainer, if pressure reducing valve fitted. Inspect and clean
as necessary.
6. Check that the discharge pipe-work is free of any obstructions.
7. Check that all electrical connections are tight.
De-Installation
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 heater.
4. Remove the heater.
5. Drain the unit through the hot water supply connection.
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