FireBird Enviromax Combi C20, Техническое руководство

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Firebird Enviromax Condensing Range
2
8
HOUSEHOLDER
DOMESTIC HOT WATER
PRODUCTION
Domestic hot water production cycle commences once
the timer has been set and switched on. If boiler and
system are cold allow 20 - 30 minutes for domestic hot
water heat store to reach working temperature. Central
heating is controlled by setting the time switch - also
located on this panel. The boiler control system always
gives priority to domestic hot water production by
automatically overriding the central heating mode as
necessary. The interruption to central heating lasts only
as long as the demand for hot water continues. This has
no significant effect on the heating circuit. Once hot
water demand has ceased the boiler will automatically
return to central heating mode if there is a demand.
When hot water only is required turn central heating
timer switch to ‘off’.
If alternative programmer is used then refer to separate
programmer instructions.
BY REQUEST COMBI C BOILERS ARE AVAILABLE
WITH BUILT-IN TIMERS.
DOMESTIC HOT WATER
OPERATION
Hot water is available on demand by turning on a hot
tap. This activates the sensor which powers the
domestic hot water pump ensuring that all boiler hot
water is diverted to the domestic heat exchanger which
heats the incoming mains water to give instant mains
pressure hot water.
Hot water is then mixed with mains cold water by a
thermostatic mixing valve set to ensure that it does not
exceed 65°C. This is shown in accompanying
photograph below.
The burner may continue to run after hot water draw off
has ceased - to ensure the pre-set temperature is
restored in the heat store. This may also occur at any
time if the control system senses that there is a need to
replenish the heat store, i.e. if there has been natural
temperature drop in heat store during long periods of
low demand for domestic hot water.