FireBird Combi 120, Installation Commissioning Servicing & User Instructions

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3
OPERATING INSTRUCTIONS
14
3-D Boiler Operation and Control
Boiler Operation and Control
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 Boilers are available with built-in timers.
Timer Switch
Pos. A
Constant
Timer Switch
Pos. B
Timed
Timer Switch
Pos. C
Off