Cleaning The Brazier; Dhw With Rapid Heat Exchanger; Dhw With Storage Tank; System With Puffer / Heat Accumulator - Cola DOMUSFIRE C17 Manuel D'installation, D'utilisation Et D'entretien

4.4.2 Cleaning the brazier

During normal operation in work mode, the 'BRAZIER CLEANING'
mode is activated at parameter-fixed intervals for a set duration.

4.4.3 DHW with rapid heat exchanger

When hot water is required, the display shows the message DHW EXCH and the LED indicated by the tap lights up.
The function is carried out only if the boiler is on, and the water inside the heating chamber has reached a sufficient
temperature.
In the remaining cases the service is not provided.

4.4.4 DHW with storage tank

This type of installation requires the use of an external thermostat or a water probe, which measures the DHW
storage tank (puffer) temperature.
In the former case, temperature SETTING is obtained by adjusting the puffer thermostat controller.
In the latter case, to modify the temperature it is necessary to press button P2 on the control panel and then increase
or decrease the temperature value with buttons P1 and P2.
The DHW function is activated when the temperature falls below the SET temperature. During the STANDBY phase,
the boiler automatically lights and goes to WORK mode. Once the work temperature of the heating chamber water is
reached, the supply of water to the storage tank (puffer) is activated. The boiler display shows the message DHW
and the respective LED lights up.
When the SET temperature of the storage tank is satisfied, the BOILER activates the heating system. If there is no
further demand, the boiler goes on STANDBY or to MODULATION, depending on the settings (see par. 4.6.2).
If the boiler is in OFF status, it does not light and does not provide the service.

4.4.5 System with puffer / heat accumulator

This type of installation requires the use of an external thermostat or a water probe, which measures the puffer water
temperature.
In the former case, temperature SETTING is obtained by adjusting the puffer thermostat controller.
In the latter case, to modify the temperature it is necessary to press button P2 on the control panel and then increase
or decrease the temperature value with buttons P1 and P2.
When the temperature drops below the SET external thermostat temperature:
If the boiler is in the AWAITING REQUEST stage, it automatically turns on and goes to WORK status and the supply
of water to the puffer is activated when the work temperature of the heating chamber water is reached.When the
puffer SET temperature is met, the boiler goes to AWAITING REQUEST (make sure to set the STANDBY function to
ON, see par. 4.6.2 ).
If the boiler is in OFF status, it does not turn on and does not provide the service.
It is possible to choose the temperature SETTING of the DHW storage tank and of heating from a min. of 54°C (STD
pump start value) to a max. of 80°C with minimum return temperature not lower than (50-55)°C in order to prevent
condensation inside the chamber.

4.5 Shutting down

To shut down the boiler, just press the button 'P4' for about 2
seconds.
The auger is immediately stopped and the fume extractor is brought
'FINAL CLEANING'
to high speed, making the message appear
on the display.
'OFF'
At the end of the operation the message appears in the
dialogue box.
During the shutdown stage the boiler cannot be restarted until the
fume temperature has fallen below a set value for a fixed time, with
'WAITING COOL'
the message appearing in the dialogue box.
At the end of the operation, the message 'OFF' will appear in the
dialog box.
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DOMUSFIRE C17-C24 HR