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PEGASUS D 30 K 100 LN
Heating output adjustment
The boiler's output PEGASUS D 30 K 100 LN setting must comply with the value given
in the technical data tablesec. 5.3. The gas valve is factory-set and provided with a ded-
icated gas diaphragm. When replacing the gas valve the adjustment screw 6 (fig. 19)
must screwed down.
Gas conversion
The unit can operate on natural gas (G20) or liquefied gas (G31) and is factory-set for
use with one of these two gases, as clearly shown on the packing and on the dataplate.
Whenever a different gas to that for which the unit is preset has to be used, a conversion
kit will be required, proceeding as follows:
1.
Replace the nozzles at the main burner and pilot burner, fitting the nozzles specified
in the technical data table in cap. 5.3, according to the type of gas used
2.
Remove the small protection cap 3 (fig. 19) from the gas valve. Using a small screw-
driver, adjust the ignition "STEP" for the required gas (G20 or G31); then refit the
cap.
3.
Adjust the gas pressure at the burner, setting the values given in the technical data
table for the type of gas used.
4.
Apply the sticker contained in the conversion kit, near the dataplate as proof of the
conversion.
fig. 19 - Gas conversion
Key
1
Pressure point upstream
2
Pressure point downstream
3
Protective cap
4
Ignition "STEP" regulator
5
Protective cap
6
Gas pressure adjustment screw
A
Honeywell VK 4100 C 1075 gas valve
B
Decrease pressure
C
Increase pressure
D
Ignition "STEP" adjustment for G20-G25 NATURAL gas
E
Ignition step adjustment for G30-G31 LIQUEFIED gas
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 discon-
necting from the systems or work 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. 19).
All manuals and user guides at all-guides.com
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
A
Checks during operation
•
•
•
•
•
•
•
4.3 Maintenance
B
Seasonal inspection of the boiler and flue
It is advisable to have the following checks carried out at least once a year:
•
•
•
•
•
•
•
•
•
Opening the front panel
To open the front panel, see the sequence in fig. 20.
B
cod. 3540T306 - Rev. 01 - 02/2015
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.
In case of a power failure while the boiler is working, the burners will go out and
relight automatically when the power is restored.
Make sure the fuel circuit and water systems are tight.
Check the efficiency of the flue and fume ducts during boiler operation.
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 flow of domestic hot water with the t given in the technical data
table: do not trust measurements made with empirical systems. The measurement
should be made with special instruments and as close as possible to the boiler, also
considering the heat lost from the pipes.
During heating operation, make sure circulating pump stops when a hot water tap is
opened, and that there is regular production of domestic hot water.
THE FOLLOWING OPERATIONS MUST ONLY BE CARRIED OUT BY
QUALIFIED PERSONNEL.
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. 24).
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.
Before carrying out any operation inside the boiler, disconnect the power supply
and close the gas cock upstream.
fig. 20 - Opening the front panel
EN
39
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