Safety Flue Thermostat; Flue Pressure Switch; Replacement Of Parts; Automatic Calibration Function - Dunkirk DCC-150 COMBI Manuel D'installation, D'utilisation Et D'entretien

16.6 SAFETY FLUE THERMOSTAT

This device, positioned on the flue inside the boiler, interrupts the flow of gas to the burner if the temperature overheats.
After verifying the cause of the trip, press
WARNING
It is forbidden to disable this safety device.

16.7 FLUE PRESSURE SWITCH

This device, positioned inside the sealed chamber, interrupts the flow of gas to the burner in case the flue pressure exceeds
1.6 in w.c. (4 mbar). Verify if the vent is blocked before resetting the boiler.
DANGER
It is forbidden to disable this safety device.

16.8 REPLACEMENT OF PARTS

Perform the Automatic Calibration procedure as described below if one or more of the following components are replaced. Check
and adjust the CO % value as indicated in the "Combustion Table".
2
Components replaced:
• Primary heat exchanger
• Fan
• Gas valve
• Gas nozzle
• Burner
• Flame sensing electrode
IMPORTANT INFORMATION
When working on the appliance, check the condition and position of the flame sensing electrode and replace it if
necessary.

AUTOMATIC CALIBRATION FUNCTION

WARNING
Before performing this function make sure there are no heat demands in progress.
During this function ensure there is maximum heat exchange to the system in the Heating or DHW mode (DHW request)
in order to avoid the boiler shutting off due to overheating.
Press and together and hold down for at least 6 seconds. When the display indicates "On" press
after pressing the previous buttons).
IMPORTANT INFORMATION
If the display indicates "303" the Automatic Calibration function has not been activated. Disconnect the boiler from the
mains power supply for a few seconds and repeat the procedure.
When the function is enabled,
After the ignition sequence, which can also take place after a few attempts, the boiler performs three operations (each lasting
approximately 1 minute) going first to maximum power, then to ignition power and lastly to minimum power. Before moving on to
the following phase (from maximum power to ignition power and then to minimum power),
this phase, the power level reached by the boiler and the delivery temperature alternate on the display.
When , and flash together on the display, the calibration function has terminated.
Press to leave the function. The display shows ESC.
IMPORTANT INFORMATION
In case the Calibration function doesn't complete the function, press
speed (parameter P71) before performing again the function. For details see the Service Manual.
for at least 2 seconds.
and flash on the display
button to exit and decrease the Maximum fan
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(within 3 seconds
and appear on the display.During
240011373, Rev. G [03/31/2017]