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Boiler service functions
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8.5 Siphon fill program
The trap filling programme ensures that the condensa-
tion trap is filled when the appliance is first installed or
after it has been shut down for a long period: The con-
densation trap prevents flue gas escaping from the
appliance into the room in which it is installed.
The trap filling programme is activated:
• the appliance is switched on at the master switch
• the burner has not been in operation for at least 48
hours
• the appliance is switched from summer to winter
mode.
The next time the heating or hot water system calls for
heat, the appliance is held at minimum output for 15
minutes. The trap filling programme remains active until
the appliance has completed 15 minutes of operation at
minimum output.
The text display shows “Siphon fill program” and the
2-digit display alternates between „-II-“ and the CH flow
temperature.
The factory setting is „1“ (activated).
9.2 Hot water on demand
The appliance is supplied with this function activated.
This function relates to mode, the button lights up.
The demand detection function enables maximum gas
and water economy.
Briefly turning a hot water tap on and then off again sig-
nals demand to the appliance which then heats up the
water to the set temperature.
Hot water is then available at short notice.
9.3 GFA-Asic error (automatic ignition module,
extended messages)
The status of, or an error message from the automatic
ignition module integrated in the PCB control board is
displayed.
Warning: if the condensation trap is not
filled, flue gas can escape!
B Only deactivate the trap filling program-
me in order to carry out servicing work.
B Always re-activate trap filling program-
me once servicing is complete.
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