Once demand is registered, the fan is started to vent any gases that may be present.
This phase is called pre-purge and lasts about 15 seconds.
The icon
is activated.
The message PRE PURGE appears.
During the pre-purge, the pressure switch closes.
The icon
is activated.
The message PRESSURE SWITCH appears.
This is then followed by the (pre-)glow of the hot surface igniter.
The icons
and are dimmed
The icon
is activated.
After a number of seconds pre-glow, the gas control valve is opened and ignition
takes place.
The icon
is activated.
The message IGNITION appears.
After ignition, the flame is detected and the appliance will be running. This means
that actual heating has started:
The icon
is dimmed.
The icon
is activated.
The message RUNNING appears.
When the water is up to temperature, the heat demand ceases and the post-purge
starts. This takes about 25 seconds.
The icons
, and are dimmed.
The icon
is activated.
The message POST PURGE appears.
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26 User part
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