Ferroli PEGASUS D LN, Instructions For Use, Installation And Maintenance

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PEGASUS D LN
32 EN
4.2 Start-up
B
System start-up must be carried out by Qualified Personnel. Checks to be made at
first lighting and after all maintenance operations that involved disconnecting from
the systems or an operation on safety devices or parts of the boiler:
Before lighting the boiler
• Open any on-off valves between the boiler and the systems.
• Check the tightness of the gas system, proceeding with caution and using a soap
and water solution to detect any leaks in connections.
• Fill the water system and make sure all air contained in the boiler and system has
been vented by opening the air vent valve on the boiler and any vent valves on the
system.
• Make sure there are no water leaks in the system, domestic hot water circuits, con-
nections or boiler.
• Check the correct connection of the electrical system.
• Make sure the unit is connected to an efficient earthing system.
• Make sure there are no flammable liquids or materials in the immediate vicinity of
the boiler.
• Vent the air from the gas pipes by means of the gas valve pressure point 1 (fig. 18).
Lighting
Open the fuel on-off valves.
Connect the power to the unit.
For the next 120 seconds the display will show FH which identifies the heating system
air venting cycle.
During the first 5 seconds the display will also show the card software release.
When the message FH disappears, the boiler is ready to operate automatically whenever
domestic hot water is drawn or in case of a room thermostat demand.
A
If, after correctly carrying out the lighting procedures, the burners do not light
and the message A01 appears on the display, wait about 15 seconds and then
press the RESET pushbutton. The reset controller will repeat the lighting cycle.
If the burners do not light after several of attempts, consult the "Troubleshoot-
ing" section.
A
In case of a power failure while the boiler is working, the burners will go out and
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 systems.
• Check correct lighting of the boiler, by turning it on and off several times.
• Make sure the fuel consumption indicated on the meter matches that given in the
technical data table on cap. 5.3.
• Check the correct delivery of domestic hot water with the
'
t given in the technical
data table: do not trust measurements made with empirical systems. The measure-
ment should be made with specific instruments and as close as possible to the boil-
er, also considering the heat loss from the pipes.
4.3 Maintenance
B
The following operations must only be carried out by Qualified Personnel.
Seasonal inspection of the boiler and flue
It is advisable to have the following checks carried out at least once a year:
•
The control and safety devices (gas valve, thermostats, etc.) must function correctly.
• The fume ducts must be clean and free of obstructions.
• The gas and water systems must be tight.
• The burner and exchanger must be clean. Follow the instructions in the next section.
• The electrodes must be free of scale and properly positioned (see fig. 22).
• The water pressure in the system when cold must be approx. 1 bar; otherwise bring
it to that value.
• The expansion tank must be filled.
• The gas flow and pressure must correspond to that given in the respective technical
data tables.
• The circulating pumps must not be blocked.
Opening the front panel
To open the front panel, see the sequence in fig. 19.
B
Before carrying out any operation inside the boiler, disconnect the electrical
power supply and close the gas cock upstream.
fig. 19 - Front panel opening
Cleaning the boiler and flue
To clean the boiler properly (fig. 20):
•
Close the gas cock ahead of the boiler and disconnect the electrical power.
• Remove the front panel of the boiler.
• Lift the casing cover by pressing upwards.
• Remove the insulation placed over the anti-backflow device.
• Remove the fume chamber closing plate.
• Remove the burner assembly (see next section).
• Clean from the top downwards, using a flue brush.
• Clean the fume evacuation ducts between the cast iron elements of the boiler shell
with a vacuum cleaner.
• Carefully refit all the previously removed parts and check the tightness of the gas
circuit and the combustion ducts.
• During cleaning operations be careful not to damage the fume thermostat bulb at
the back of the fume chamber.
fig. 20 - Boiler cleaning
1 Casing cover
2 Fume chamber closing plate
3 Flue brush
7 Combustion analysis plug
Combustion analysis
A point for sampling fumes has been included inside the boiler, in the upper part of the
anti-backflow device (detail 7 - fig. 20).
To take the sample:
1.
Remove the upper panel of the boiler
2. Remove the insulation placed over the anti-backflow device;
3. Open the fume sampling point;
4. Insert the probe;
5. Activate the TEST mode
6. Wait 10-15 minutes for the boiler to stabilise*
7. Take the measurement.
A
Analyses made with an unstabilised boiler can cause measurement errors.
3
2
1
7
cod. 3540U017 - Rev. 02 - 02/2015