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Check that the discharge pipe drains safely to waste and is readily visible.
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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.
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Open all outlet taps.
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Turn on the mains water supply.
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Close taps in turn as water flow stabilises with no air bubbles.
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Check for leaks.
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Check that no water is passing through the safety valve(s).
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Test the operation of the safety valve(s) by lifting/turning the lever/knob,
and observing that water flows through and safely to waste.
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Switch on electricity and set thermostat (see page 4).
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Check the water heats up.
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Check that “warning to user label” is secure and visible on the heater and
related warning labels are fitted to the controls.
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Demonstrate operation to user, including operation of safety valve(s) and
what to do if it/they operate(s).
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Give this handbook to the user and discuss future maintenance.
Maintenance
a) For the user
In order to obtain the best performance from the heater, the sacrificial anode must
be inspected every year at more regular intervals in aggressive water areas. If the
heating element is heavily coated with scale we recommend descaling 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.
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 4 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 (MW 10 U/15U - EW 10/15) disconnect pipes and
remove the heater from the wall.
ii)
for over-sink models (MW 10 O - MW 15 O) undo the cold water supply
pipe and open a hot water tap.
The heating element may be removed after taking out the thermostat
phials by undoing the M6 nut.
The assembly should then be turned through 90° anti-clockwise to ease
removal from the water container.
