■ Remove and clean any oxidation from the burner.
■ Check that the seal of the room-sealed chamber is undamaged and positioned correctly.
■ Check the primary heat exchanger and clean if necessary.
■ Check the maximum and minimum modulation pressures and the modulation itself.
■ Check the condition and operation of the ignition and gas safety systems. If necessary, remove and clean the
scaling from the ignition and flame detection electrodes, paying particular attention to replace them at the correct
distance from the burner.
■ Check the heating safety systems: temperature limit safety thermostat, pressure limit safety device.
■ Check the pre-fill pressure of the expansion vessel (see expansion vessel data plate).
■ For safety reasons, periodically check the integrity and operation of the exhaust system.
■ Check that the connection to the mains electricity supply complies with that reported in the water heater’s
instruction manual.
■ Check the electrical connections inside the control panel.
■ Check the D.H.W flow rate and temperature.
■ Check that the condensate drain system is working correctly, including any parts of the system outside the water
heater such as condensate collection devices along the length of the flue and/or any acid neutralising devices.
■ Check that the condensate flows freely and that there are no exhaust fumes present within the appliance.
Warranty will not be offered if recommended maintenance is not followed.
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