Pegasus F2
14
5. STARTUP AND SHUTDOWN
5.01 Checks to be carried out at first startup
It is good practice to check the following at first startup: that the cutoff valves between the boiler and
heating system are open; that all is well pressurized and vented; that there are no gas or water leaks
from the water system or boiler; that the electrical connections are correct and the earthing cable
connected to a good earthing system; that there are no inflammable liquids or materials in the
immediate vicinity of the boiler and that the flue is not blocked.
5.02 Startup procedure
-
Set the boiler control thermostat knob to the desired temperature (not below 50
°
C).
-
Open the gas cock upstream from the boiler.
-
Vent gas supply pipework.
-
Switch on boiler.
At this point the electronic control unit takes over and after a preset pause sends a command to the pilot
valve to open and triggers off the discharge to the spark electrodes, igniting the pilot burner.
The pilot burner flame, ionizing the detection electrode, sends a signal to the electronic control unit
which in turn sends a command to the main valve to open, igniting the main burner.
The boiler now functions automatically, controlled by the boiler control thermostat and/or by any other
command/control devices (room thermostat, electronic thermostat board, etc.).
Note: If after having closely followed the startup procedure the burners fail to light and the reset button
warning light on the electronic control unit is lit, it means that the board has locked out and you
should wait about 10 seconds before pressing the reset button.
After resetting, the board repeats the startup cycle.
If the burners still fail to light after the second attempt, read paragraph 9, “Fault finding”.
In the event of the electric power supply to the boiler being cut off, the burners shut down and
light up again automatically when the power returns.
5.03 Temporary shutdown
To turn the boiler off temporarily, simply switch off the power supply to the boiler. The electrical
components will be without power and the main and pilot burners will remain off.
5.04 Long-term boiler shutdown
Turn off inlet gas cock to the boiler and switch off the power supply.
Caution: If the boiler remains unused for long periods during the winter, in order to avoid frost
damages you should pour a suitable anti-freeze into the system or drain it completely.
5.05 Inspections and controls after startup
At first startup:
- Make sure the gas supply is perfectly leakproof.
- Make sure the pilot light is adequate and well adjusted.
- Test boiler ignition by starting it and turning it off using the control thermostat.
- Check that no flue products escapes from the boiler draft diverter indicating that either the flue is
blocked or the draft is insufficient.
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