- Check that the discharge pipe drains safely to waste and is readily visible.
- Check, in the case where some components are not factory fitted, that they are
marked so as to refer to the warning label on the water heater.
- Open all outlet taps.
- Turn on the mains water supply.
- Close taps in turn as water flow stabilises with no air bubbles.
- Check for leaks.
- Check that no water is passing through the safety valve(s).
- Test the operation of the safety valve(s) by lifting/turning the lever/knob, and
observing that water flows through and safely to waste.
- Switch on electricity and set thermostat to at 60°C to reduce the build up of scale
in hard water areas.
- Check the water heats up.
- Check that <<warning to user label>> is secure and visible on the heater and
related warning labels are fitted to the controls.
- Demonstrate operation to user, including operation of safety valve(s) and what to do
if it/they operate(s).
- Give this handbook to the user and discuss future maintenance.
- Drain and refill the entire system ensuring it is flushed in accordance with BS6700.
Maintenance
a) For the user
In order to obtain the best performance from the heater, the sacrificial anode must
be checked every year and replaced as necessary. If the heating element is heavily
coated with scale we recommend descaling and removing any lime deposit from the
heater at the time of this inspection. Where the additional cold water controls are
fitted, the expansion vessel will need to be recharged by the installer.
Important note: The heater must be serviced annually. Failure to service which
includes inspection and replacement of the sacrificial anode will invalidate
warranty.
b) For the installer
WARNING: Switch off the power first
Access to the electrical components, the magnesium anode and water container is
gained by unscrewing the 2 screws on the front cover.
If the thermal cut-out has operated the cause must be found before resetting.
To drain the heater close the service valve and:
i) for under-sink models disconnect pipes and removed the heater from the wall.
ii) for over-sink models undo the cold water supply pipe and open a hot water tap.
The heating element may be removed (after taking out the thermostat phials on
model 30 L) by undoing the M6 nut.
The assembly should then be turned through 90° anti-clockwise to ease removal
from the water container.
Once the element is free from the water container the anode may then be
inspected and removed if necessary.
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