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PEGASUS 56
•
Make sure there are no water leaks in the system or boiler.
•
Check the correct connection of the electrical system.
•
Make sure the unit is connected to an efficient earthing system.
•
Make sure the pressure and gas flow values are those required for heating.
•
Make sure there are no flammable liquids or materials in the immediate vicinity of
the boiler
Lighting the boiler
•
Open the gas cock ahead of the boiler.
•
Vent the air from the pipe ahead of the gas valve.
•
Turn on the switch or insert the plug (if present) ahead of the boiler
•
Turn the boiler switch (ref. 6 - fig. 46) to position 1.
•
Turn the knob 5 (fig. 46) to a value above 50°C and that of the room thermostat (if
present) to the required temperature value. The burner will light and the boiler be-
gins to function automatically, controlled by its adjustment and safety devices.
If the burners do not light and the pushbutton
B
indicator comes on after correctly carrying out
the lighting procedure, wait about 15 seconds
and then press the above pushbutton. The re-
set controller will repeat the lighting cycle. If
the burners do not light after the second at-
tempt, refer to par. 3.4 "Troubleshooting".
The boiler switch 6 has 3 positions "0-1-
TEST"; the first two have the on-off function,
the third (unstable) must only be used for
service and maintenance purposes (see wir-
ing diagrams).
In case of a power failure while the boiler is working, the burners will go out and
A
relight automatically when the power is restored.
Checks during operation
•
Make sure the fuel circuit and water systems are tight.
•
Check the efficiency of the flue and fume ducts while the boiler is working.
•
Make sure the water is circulating properly between the boiler and the system.
•
Check correct lighting of the boiler, by turning it on and off several times using the
room thermostat or boiler thermostat.
•
Make sure the fuel consumption indicated on the meter matches that given in the
technical data table in cap. 20.
Turning off
To temporarily turn the boiler off, just the turn main switch 6 (fig. 46) to 0.
To shut down the boiler for prolonged periods:
•
Turn knob of the main switch 6 (fig. 46) to 0;
•
Close the gas cock ahead of the boiler;
•
Disconnect the power to the unit;
To avoid damage caused by freezing during
B
long idle periods in winter, it is advisable to
drain all water from the boiler and system; or
add a suitable antifreeze to the heating sys-
tem.
4.3 Maintenance
The following operations must only be carried
B
out by Qualified Personnel.
Seasonal inspection of the boiler and flue
It 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 tight.
•
The burner and boiler shell must be clean. Follow the instructions in the next section.
•
The electrodes must be free of deposits and properly positioned (see fig. 53).
•
The water pressure in the system when cold must be approx. 1 bar; otherwise bring
it to that value.
•
The expansion tank, if present, must be filled.
•
The gas delivery and pressure must correspond to that given in the technical data
table (see sec. 20.3).
•
The circulating pumps must not be blocked.
Safety devices
The boiler PEGASUS 56 is equipped with devices that guarantee safety in case of oper-
ation faults.
Automatic-reset temperature limiter (safety thermostat)
This device prevents the water temperature in the system from exceeding boiling point.
The maximum cut-in 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 identification and consequent elimination
of the problem that caused the shutdown. The safety thermostat (detail 7 of fig. 46) is
located inside the control panel.
Fume sensor safety device (fume thermostat)
The boiler is equipped with a fume evacuation control device (fume sensor - ref. 3 of
fig. 46). In case of anomalies in the fume evacuation system with consequent return of
burnt gases in the room, the unit shuts down. The anti-wind hood is equipped with a tem-
perature sensor bulb for measuring and controlling the fume temperature.
Any leakage of burnt gases in the room causes a temperature increase detected by the
bulb, causing the boiler to shut down within 2 minutes and stopping the gas to the burner.
If the fume sensor cuts in, unscrew the protection cover (ref. 3 of fig. 46) located on the
control panel and manually reset the device. The boiler will start working again.
If the sensor has to be replaced due to a failure, only use original accessories and ensure
that the electrical connections and bulb positioning are correctly carried out.
THE FUME SENSOR MUST NOT BE CUT
B
OUT FOR ANY REASON!
Opening the front casing
To open the boiler front panel, see the sequence in fig. 49.
Before carrying out any operation inside the
B
boiler, disconnect the power and close the gas
cock upstream.
cod. 3540S424 - Rev. 00 - 10/2020
1
2
fig. 4 - Front panel opening
EN
31
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