Connection To The Flue; Service And Maintenance - Ferroli PEGASUS 56 Instrucciones De Uso, Instalación Y Mantenimiento

The layout of the terminals for the various connections is given in the wiring diagrams in
cap. 20.
fig. 2 - Control panel opening
Key / sequence
1 Boiler cover
2 Fixing plate and screw
3 Control panel

3.6 Connection to the flue

The flue connection pipe diameter must not be less than that of the connection on the
anti-backflow device. Starting from the anti-backflow device it must have a vertical sec-
tion at least 50 cm long. Comply with the current standards regarding installation and siz-
es of the flues and connection pipe.

4. SERVICE AND MAINTENANCE

4.1 Adjustments
All adjustment and conversion operations must be carried out by Qualified Personnel.
The manufacturer declines any liability for damage to property and/or persons resulting
from unqualified and unauthorized persons tampering with the unit.
Heating system output adjustment
This operation is carried out with the boiler working.
Connect a manometer to he pressure point 2 (fig. 48) located downstream of the gas
valve, and turn the boiler thermostat knob (ref. 5 - fig. 46) to the maximum value.
After removing the protection cap 5 (fig. 48), adjust the gas pressure at the burner by
turning the screw 6 to the required value (see technical data table and output variability
diagrams given in cap. 20).
Then turn the burner on and off 2 or 3 times by means of the control thermostat and
check that the pressure value is that just set; otherwise, another adjustment must be
made to bring the pressure to the correct value.
30
EN
1
2
3
cod. 3540S424 - Rev. 00 - 10/2020
PEGASUS 56
Gas conversion
The unit can work with Natural gas (G20-G25) or liquefied gas (G30-G31) and is factory-
set for use with one of the two gases, as clearly shown on the data plate. Whenever a
gas different from that for which the unit is arranged has to be used, the special conver-
sion 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. 20, according to the type of gas used
2. Remove the small protection cap 3 (fig. 48) from the gas valve. Using a small screw-
driver, adjust the ignition "STEP" for the desired gas (G20-G25 position D fig. 48 or
G30-G31 position E fig. 48); then refit the cap.
3. Adjust the gas pressure to the burner, setting the values indicated in the technical
data table for the type of gas used.
4. Apply near the data plate the sticker contained in the conversion kit, as proof of the
conversion.
5
7
8
B C
6
fig. 3 - Pressure adjustment
A 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
F Electronic controller
1 Pressure point upstream
2 Pressure point downstream
3 Protection cap
4 Ignition STEP regulator
5 Protection cap
6 Pressure adjustment screw
7 Alarm LED
8 RESET button
4.2 Start-up
System start-up must be carried out by Quali-
B
fied Personnel. Checks to be made at first
lighting, and after all maintenance operations
that involved disconnecting from the systems
or work on safety devices or parts of the boil-
er:
Before lighting the boiler:
• Open any on-off valves between the boiler and the system.
• 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 the system
has been vented.
F
A
1
2
3
4
D
E