40
FUNCTIONS OF CONTROL SWITCHES /
CONTROL KEYS:
Pressing the switch
O
I
powers the panel and all the
operations connected to it.
By holding key
for few seconds it is possible to select the
following operation options:
-
WOOD COMB
-
AUTO COMB
-
BURN COMB
- - - - -
Stand-by (all off)
WOOD COMB
In this mode the wood boiler is in operation.
When boiler operation stops, the back-up boiler is NOT activated.
AUTO COMB
In this mode the wood boiler is in operation and the words Leg
Auto flash on the display; the boiler is working on wood.
When loading is completed, in the event of demand, the back-up
boiler is automatically activated.
BRUC COMB
In this mode the back-up boiler is in operation.
After selecting the
LEGN COMB
or
AUTO COMB
mode, by
pressing
for one second the fan is powered. This will
remain active as long as there is wood in the boiler wood com-
partment. This cycle is timed; therefore when activated with this
key, the board controls the boiler's ability to produce heat; when
it runs out, the boiler returns to the standby status after a preset
time during which no more heat is available. The load end status
is brought about by the flue gas temperature
The
key changes the SUMMER / WINTER setting; in
SUMMER mode the heating system pump is disabled.
The key
changes the priority between domestic hot water
and heating.
This key is active if there is a storage tank with a coil. It stops
heating in favour of DHW production and vice versa.
The storage tank water production cycle or storage tank load-
ing will automatically activate when the storage tank minimum
temperature is reached and it will de-activate when the storage
tank has reached the desired temperature.
When room heating is managed by the chronothermostat (or
room thermostat) control, with closed contact and sufficient
boiler temperature, the board activates the heating system pump.
The arrangement will be viewed on the display according to the
following phases:
- “DHW” setting, the boiler automatically activates domestic
hot water priority when the storage tank has reached the
minimum temperature.
- “OFF” setting when the boiler has requested neither DHW
or heating.
- “CH” setting when the boiler has been requested heating
through the chronothermostat (or room thermostat) input
contact.
- “MAINT” when a DHW or heating request is activated, and
parameter “P 0” is met.
The key
silences the sound alarm in case of overtem-
perature alarm.
In case of an alarm, all the pumps configured according to the
programmed operating mode are activated to disperse excess
heat (ANTI-INERTIA FUNCTION) and the fan stops.
The sound alarm is triggered automatically should the boiler's
flow temperature exceed the “P 2” value. At the same time, the
STORAGE TANK PUMP function LED and the SYSTEM PUMP
function LED on the display switch on.
The
key is used to reset the “self-diagnostics” con-
troller.
This operation does not affect the set parameters, which
are not modified.
Summary of Contents for NOVAIREX 35
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