Publicité
Les langues disponibles
Les langues disponibles
PEGASUS D
Accessing the electrical terminal block
Undo the two screws "A" located on the top part of the control panel and remove the
cover.
fig. 15 - Accessing the terminal board
3.6
Air/fume ducts
The diameter of the connecting pipe to the flue must not be less than that of the connec-
tion on the anti-backflow device. Starting from the anti-backflow device it must have a
vertical section at least 50 cm long. The current regulations must be respected regarding
the dimensioning and installation of the flues and connection pipe.
The boiler is a B11BS type equipped with a safety device (fume thermostat) that stops
the supply of gas and shuts down the unit in case of poor draught or disturbance in the
fume exhaust. Unit shutdown is indicated on the display with the code F04 (ref. cap. 3.4).
Restarting of the unit occurs automatically 20 minutes after the end of the fault that
caused the problem. In case of repeated intervention of the device, contact qualified per-
sonnel to check the flue and chimney and eliminate the fume evacuation fault.
B
This safety device must never be tampered with or deactivated. Any operation
on the device, or its replacement, must only be carried out by qualified person-
nel using the manufacturer's original replacement parts. A functional test must
be carried out after any operation on the device.
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 and/or injury caused by unqualified
and unauthorised persons tampering with the unit.
Turning on TEST mode
Press the heating buttons (details 3 and 4 - fig. 1) together for 5 seconds to activate the
TEST mode. The boiler lights at the maximum heating power set as described in the fol-
lowing section.
The heating symbol (detail 24 - fig. 1) and DHW symbol (detail 12 - fig. 1) flash on the
display.
fig. 16 - TEST mode
To deactivate the TEST mode, repeat the activation sequence.
The TEST mode is automatically disabled in any case after 15 minutes.
Heating system output adjustment
On PEGASUS D boilers, the firebox heating power and therefore the heat output deliv-
ered to the heating water can only be adjusted by means of the main burner through the
gas valve, (see fig. 17). The diagrams given in the section cap. 5.2 indicate the variation
in heat output delivered to the water according to the change in burner operating pres-
sure. Being able to adjust boiler output to the actual heating requirements means above
all reducing heat losses, and therefore obtaining fuel saving. Also, with the variation in
output, also regulated by the provisions, the boilers keep their efficiency levels and com-
bustion characteristics practically unchanged
This operation is carried out with the boiler working and the water storage tank heated.
1.
Using a small screwdriver, remove the secondary operator protection cap 5 of the
gas valve of fig. 17.
2.
Connect a manometer to the pressure point 2 (fig. 17) located below the gas valve,
and turn the boiler thermostat knob to the maximum value.
3.
Adjust the pressure to the required value by means of the screw 6 (fig. 17), referring
to the diagrams given in section cap. 5.2.
4.
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.
A
A
bar
cod. 3540U174 - Rev. 04 - 11/2018
Gas conversion
The unit can work with either 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 packing and data-
plate. Whenever a different gas to that for which the unit is arranged has to be used, the
special 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, according to the type of gas used
2.
Remove the small protection cap 3 (fig. 17) from the gas valve. Using a small screw-
driver, adjust the ignition "STEP" for the required gas (G20-G25 position D fig. 17 or
G30-G31 position E fig. 17); 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.
B
C
6
fig. 17 - 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
1
Pressure point upstream
2
Pressure point downstream
3
Protection cap
4
Ignition STEP regulator
5
Protection cap
6
Pressure adjustment screw
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 an operation on safety devices or parts of the boil-
er:
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. 17).
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.
If, after correctly carrying out the lighting procedures, the burners do not light
A
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
A
relight automatically when the power is restored.
A
5
1
2
3
4
D
E
EN
31
Publicité
