Technical Data And Characteristics; Dimensions And Connections; General View And Main Components - Ferroli PEGASUS LN 2S Serie Instructions D'utilisation, D'installation Et D'entretien

PEGASUS LN 2S
4.4 Troubleshooting
Fault Cure
After several lighting attempts , the Clean the pilot burner nozzles with compressed air.
electronic controller shuts down the
Check the regular gas flow to the boiler and that the air has been eliminated from the
boiler.
pipes.
Make sure the electrodes are correctly positioned and free of deposits (see
Make sure the boiler is connected to an efficient earth connection.
Check the connections to the ignition and ionisation electrodes.
The electrodes are not discharging in
Make sure the electrodes are correctly positioned and free of deposits (see
the ignition phase.
Control thermostat adjusted too low.
Check the power supply.
Check the connections to the ignition and ionisation electrodes.
Check the connections to the electronic flame controller.
Make sure the LINE -NEUTRAL are not inverted and that the earth contacts are effi-
cient.
Check the inlet gas pressure and any open gas pressure switches.
Reset the safety thermostat.
Make sure the room thermostat is closed.
The burner burns poorly: flames too Gas valve filter dirty.
high, too low or too yellow
Check the gas supply pressure.
Gas nozzles dirty.
Make sure the boiler is not dirty.
Make sure the ventilation in the room where the unit is located is sufficient for proper
combustion.
Smell of unburnt gas Make sure the boiler is clean.
Check the flue draught.
Make sure gas consumption is not excessive.
The boiler works but the temperature Check correct operation of the 2-stage control thermostat.
fails to increase
Make sure the gas valve 2nd stage operator (max. power) is fed.
Make sure gas consumption is not less than that provided for.
Make sure the boiler is perfectly clean.
Make sure the boiler is adequate for the system.
Make sure the heating pump is not blocked.
Temperature of the water to system too Check correct operation of the 2-stage control thermostat.
high or too low
Make sure the heating pump is not blocked.
Make sure the characteristics of the circulating pump are adequate for the system.
Explosion at burner. Ignition delays Make sure the gas pressure is sufficient and that the boiler casing is not dirty.
The control thermostat switches back Make sure the bulb is properly inserted in the sheath.
on with too great a temperature differ-
Check correct operation of the 2-stage thermostat.
ence
The boiler produces condensation Make sure the boiler is not operating at too low temperatures (below 50°C).
water
Make sure gas consumption is regular.
Check the efficiency of the flue.
The boiler goes out for no apparent Safety thermostat activation due to an overtemperature.
reason
To avoid unnecessary expense, before calling the After-Sales Service make
A
sure the boiler has not stopped due to no power or gas.

5. TECHNICAL DATA AND CHARACTERISTICS

5.1 Dimensions and connections

A
F
B
fig. 12 - Dimensions and connections
A Version PEGASUS 80 - 125 LN 2S
B Version PEGASUS 160 - 250 LN 2S
All manuals and user guides at all-guides.com
B
A
C
E
a2
a3
a1
D
cod. 3540T612 - Rev. 01 - 02/2015
Type and model A
PEGASUS 119 LN 2S 930
PEGASUS 136 LN 2S 1020 148 250 53 45 1050
PEGASUS 153 LN 2S 1100 148 250 58 43 1050
fig. 10
).
PEGASUS 170 LN 2S 1190 173 300 60 46 1050
PEGASUS 187 LN 2S 1270 173 300 58 44 1050
fig. 10
).
PEGASUS 221 LN 2S 1440 173 300 57 45 1050
PEGASUS 255 LN 2S 1610 198 350 62 46 1100
PEGASUS 289 LN 2S 1780 198 350 66 49 1100

5.2 General view and main components

A
9
8 7
17
16
14
13
15
fig. 13 - General view and main components
A Version PEGASUS 80 - 125 LN 2S
B Version PEGASUS 160 - 250 LN 2S
Key
1 "0 - 1 - TEST" switch
2 2-stage control thermostat
3 2nd stage electronic controller reset button
4 1st stage electronic controller reset button
5 Thermohydrometer
6 Plug
7 Safety thermostat
8 Prearrangement for fitting an electronic controller
9 Fume point on fume chamber
12 Gas pressure switch
13 Pilot burner complete with electrodes
14 Gas manifold
15 Pressure point
16 Drain cock
17 Gas valve with elect. controller 1st stage
17A 1st stage gas valve
18 Gas valve with elect. controller 2nd stage
18A 1st stage gas valve
a1
B C D E F heating
return
133 220 50 42 1050 2"
2"
2"
2"
2"
2"
2"
2"
B
5 4 6
3 2
1
12
18
13
17
15
EN
a2 a3
heating Gas
delivery inlet
2" 1"
2" 1"
2" 1" 1/2
2" 1" 1/2
2" 1" 1/2
2" 1" 1/2
2" 1" 1/2
2" 1" 1/2
18
18A
17A
33