Ferroli SIGMA Installation And Servicing Instructions page 22

3.01 Checks to be carried out before starting up for the fi rst time
When fi ring the boiler up for the fi rst time, it is good practice to check:
that the isolation valves between the boiler and central heating systems are open;
that the central heating system is well fi lled and vented;
that there are no gas or water leaks from the central heating system or boiler;
that the electric connections are correct and the earth wire of the boiler is connected to an effi cient earthing
installation;
that there are no infl ammable liquids or materials near the boiler;
that the central heating gas pressure and fl ow rate are as required.
3.0 Starting up the boi er
• Open the gas cock of the boiler.
• Vent air present in the pipe upstream of the gas valve.
• Turn on the switch (if present) or plug upstream of the boiler.
• Rotate the C.H. temperature adjustment knob above Min position.
• Set the room thermostat (if fi tted) to maximum.
• At this point, the burner ignites and the boiler starts to function automatically, controlled by its control
and safety devices.
ote If after completing the start-up procedure correctly, the burner fails to ignite and the boiler shut down warning
lights up, wait about 15 seconds then press the reset switch. The reset electronic control unit will repeat the start-up cycle.
If after a second attempt the burners still fail to ignite, consult the paragraph "Troubleshooting".
ote If there is a power failure while the boiler is in operation, the burners automatically go out and re-ignite
when the power returns.
If the system is fi lled with very cold water, the boiler will automatically light due to the frost thermostat sensing the low
temperature. The boiler will not shut down, until the water temperature reaches 10°C.
3.03 Shutting do n
o shut do n the boi er for short periods
Set the temperature adjustment knob to Off position.
o shut do n the boi er for ong periods
Turn off gas supply.
• Turn off the electricity supply.
The boiler is protected by integral frost protection, but if the boiler is not to be used for a long period of
time, the system should be drained.
ote The frost thermostat operates even if the temperature adjustment knob is in the O
therefore, if the system is drained, for the external electrical and gas supplies to be isolated.
It is recommended that a label be affi xed to the appliance to draw attention to the fact that the system
has been drained.
3.0 Checks and tests after fi rst start up
Check there are no leaks in the gas and water circuits.
Check correct boiler start up by carrying out start up and shut down tests using the boiler stat.
Check the integrity of the air-fl ue pipes during boiler operation.
Check that the gas consumption indicated on the meter corresponds to that given in Technical
1.0 ).
Check that water is circulating correct.
does not exceed 0°C.
Sigma
alance the radiators to ensure that the fl ow and return differential
position and it is necessary
ata (paragraph