Maintenance - Ferroli PEGASUS F2 N T Instructions For Use, Installation And Maintenance

Pegasus F2 N T
To avoid damage caused by freezing during long shutdowns in winter, it is advisable to drain all
water from the boiler and the system; or add a suitable antifreeze to the heating system.

3.3 Maintenance

The following operations must only be carried out by Qualifi ed Personnel.
easonal inspection of the boiler and fl ue
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t is advisable to carry out the following checks at least once a year:
• The control and safety devices (gas valve, thermostats, etc.) must function correctly.
• The fume ducts must be free of obstructions and leaks.
• The gas and water systems must be airtight.
• The burner and boiler shell must be clean. Follow the instructions in the next paragraph.
• The thermocouple must be free of scale and properly positioned (see fi g. 16).
• The water pressure in the cold water system must be about 1 bar; otherwise, bring it to that value.
• The expansion tank, if present, must be fi lled.
• The gas fl ow and pressure must correspond to that given in the respective tables (par. 4.3).
• The circulating pumps must not be blocked.
Safety devices
The Pegasus F2 N T boiler is equipped with devices that guarantee safety in the event of
operation anomalies.
Temperature limiter (safety thermostat) with automatic reset
This device prevents the water temperature in the system from exceeding boiling point. The maximum
intervention temperature is 110° C.
Automatic reset of the temperature limiter can only occur with cooling of the boiler (the temperature
must drop by at least 10° C) and identifi cation and consequent elimination of the problem that
caused the shutdown.
Fume sensor (fume thermostat) safety device with manual reset
The boiler is equipped with a device to control the evacuation of fumes (fume sensor - pos. 7 of fi g.
19). If there are any anomalies in the fume evacuation system with consequent return of burnt gas
in the environment, the unit shuts down. The hood is equipped with a temperature sensor bulb for
measuring and controlling the fume temperature.
Any leak of burnt gases into the environment causes an increase in the temperature detected by the
bulb, which causes the boiler to turn off within 2 minutes shutting off the gas to the burner. If the fume
sensor intervenes, unscrew the protection cover (7 of fi g. 19) located on the control panel and manually
reset the device. The boiler will resume operation.
If the sensor has to be replaced due to breakdown, only use original accessories and ensure that the
electrical connections and positioning of the bulb have been correctly carried out.
The fume sensor must not be cut-out for any reason!
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