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V - sequence of operation – LAARS IGI-180C-5(N,X) - Service Manual User Manual

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V - SEQUENCE OF OPERATION

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When the hot water tap is turned off, the water flow sensor stops revolving, and the magnetic pulse

ceases, indicating to the PCB that there is no water flowing, in turn the PCB closes the gas valves. The

combustion fan continues to operate for 65 seconds. This will provide quicker ignition when the tap is

turned on and off in rapid succession, and removes the need for a pre-purge cycle allowing the burner

to re-light immediately when a hot water tap is opened again.

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