Firebird Enviromax Condensing Range
2
10
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 10 - 15 minutes for domestic
hot water heat store to reach working temperature.
Central heating is controlled by setting the CH timer.
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 on the timer to ‘off’.
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 factory set to ensure that it
does not exceed 55˚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.
Combi
Mixing Valves
Slimline Combi
Mixing Valves
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