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

PEGASUS D LN
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 Connection to the flue
The diameter of the flue connection pipe 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
section at least 50 cm long. Current standards must be complied with regarding the sizes
and installation of the flues and connection pipe.
The diameter of the anti-backflow device is given in fig. 23 and in fig. 24.

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 or injury caused by unqualified and
unauthorised people 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 output adjustment
The boiler's output PEGASUS D LN setting must comply with the value given in the tech-
nical data tablesec. 5.3. The gas valve is factory-set and provided with a dedicated gas
diaphragm. When replacing the gas valve the adjustment screw 6 (fig. 18) must screwed
down.
Gas conversion
The unit can run on 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 on the dataplate.
Whenever a gas different from that for which the unit is arranged has to be used, the spe-
cial 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. 18) from the gas valve. Using a small screw-
driver, adjust the ignition STEP for the required gas (G20-G25 position D fig. 18 or
G30-G31 position E fig. 18); 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
To convert the boiler from Natural Gas to LPG the gas diaphragm placed be-
tween the valve and the manifold pipe (ref. 1 - fig. 17) must be removed.
To convert the boiler from LPG to Natural Gas the gas diaphragm (ref. 1 -
fig. 17) must be inserted. The correct gas diaphragm for each boiler model is
given in the technical data table on sec. 5.3.
A
bar
cod. 3540U017 - Rev. 02 - 02/2015
fig. 17 - Gas baffle
Key fig. 17
1. Gas diaphragm
2. Seal
fig. 18 - Pressure adjustment
Key fig. 18
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 LIQUEFIEDgas
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
1 2
EN
31