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

Pegasus F2 N T
Turning the boiler off temporarily
To turn the boiler off for a short period of time, just cut off power to the unit (by turning the boiler switch
off). In this way, power is cut off to all the electric parts and only the pilot light stays on.
Turning the boiler off for an extended period
Turn knob 1 as shown in fi g. 3 (on models 51-68), or press button 2 as shown in fi g. 4 (on models
85-102). This shuts off the gas line to both the main burner and the pilot. Close the gas cock ahead
of the boiler and cut off power to the unit.
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.
The boiler switch 6 has 3 positions, "0-1-TEST"; the fi rst two have the on-off function, the third
(unstable) must only be used for service and maintenance purposes.

1.4 Adjustments

System temperature adjustment
Turn knob 5 (fi g. 1) clockwise to increase the heating water temperature, turn anticlockwise to decrease
it. The temperature can be varied from a minimum of 30° C to a maximum of 90° C. However, it is
advisable not to operate the boiler below 50° C.
Room temperature adjustment (with optional room thermostat)
Using the room thermostat, set the temperature desired in the rooms. Controlled by the room
thermostat, the boiler lights and delivers water to the system at the temperature set by the
boiler control thermostat 5 (Fig. 1). The generator turns off when the desired temperature in
the rooms is reached.
If the room thermostat is not installed the boiler will keep the system at the temperature set
by the boiler control thermostat.
Water system pressure adjustment
The fi lling pressure with system cold, read on boiler hydrometer (detail 2 in fi g.1), must be about 1.0 bar.
If, during operation, the system pressure falls (caused by the evaporation of gas dissolved in the water) to
values below the minimum described above, the user must bring it back to the initial value by operating
the fi lling cock. At the end of the operation always close the fi lling cock.
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