Ferroli PEGASUS F2 51 Troubleshooting guide

INSTALLATION ANDINSTALLATION AND
INSTALLATION ANDINSTALLATION AND
INSTALLATION AND
MAINTENANCE INSTRUCTIONSMAINTENANCE INSTRUCTIONS
MAINTENANCE INSTRUCTIONSMAINTENANCE INSTRUCTIONS
MAINTENANCE INSTRUCTIONS
GAS-FIRED CAST-IRON BOILERSGAS-FIRED CAST-IRON BOILERS
GAS-FIRED CAST-IRON BOILERSGAS-FIRED CAST-IRON BOILERS
GAS-FIRED CAST-IRON BOILERS
WITH ELECTRONIC IGNITIONWITH ELECTRONIC IGNITION
WITH ELECTRONIC IGNITIONWITH ELECTRONIC IGNITION
WITH ELECTRONIC IGNITION
AND FLAME RECTIFICATION MONITORINGAND FLAME RECTIFICATION MONITORING
AND FLAME RECTIFICATION MONITORINGAND FLAME RECTIFICATION MONITORING
AND FLAME RECTIFICATION MONITORING
PEGASUS F2PEGASUS F2
PEGASUS F2PEGASUS F2
PEGASUS F2
Models 51 - 68 - 85 - 102Models 51 - 68 - 85 - 102
Models 51 - 68 - 85 - 102Models 51 - 68 - 85 - 102
Models 51 - 68 - 85 - 102
Appr. nr. A 9503 A - 0085 AQ 0765
cod. 3543463/0 - 01/01

Pegasus F2Pegasus F2
Pegasus F2Pegasus F2
Pegasus F2
2
ContentsContents
ContentsContents
Contents
1.1.
1.1.
1. General technical data .............................................................................................................. 3
2.2.
2.2.
2. Dimensions and technical data ................................................................................................. 3
3.3.
3.3.
3. Boiler installation ...................................................................................................................... 7
4.4.
4.4.
4. Wiring and connection diagrams...............................................................................................8
5.5.
5.5.
5. Startup and shutdown ............................................................................................................. 13
6.6.
6.6.
6. Regulating ............................................................................................................................... 15
7.7.
7.7.
7. Fuel conversion (from natural to l.p.g. Gas) ............................................................................. 19
8.8.
8.8.
8. Maintenance and cleaning ...................................................................................................... 20
9.9.
9.9.
9. Fault finding ............................................................................................................................ 21

3
Pegasus F2Pegasus F2
Pegasus F2Pegasus F2
Pegasus F2
1. GENERAL TECHNICAL DATA1. GENERAL TECHNICAL DATA
1. GENERAL TECHNICAL DATA1. GENERAL TECHNICAL DATA
1. GENERAL TECHNICAL DATA
1.011.01
1.011.01
1.01 IntroductionIntroduction
IntroductionIntroduction
Introduction
The Pegasus F2Pegasus F2
Pegasus F2Pegasus F2
Pegasus F2, with CE approval, is designed for use with natural gas (G20) or LPG (G31) for indirect
central heating and hot water.
1.021.02
1.021.02
1.02 Installation requirementsInstallation requirements
Installation requirementsInstallation requirements
Installation requirements
Only CORGI registered installers should fit the Pegasus boilers.
The boiler installation should comply with relevant British Standards Specifications, codes of practice,
and Current Building Regulations, together with any special Regional Requirements of the Local
Authorities, gas supplier and Insurance Companies.
2. DIMENSIONS AND TECHNICAL DATA2. DIMENSIONS AND TECHNICAL DATA
2. DIMENSIONS AND TECHNICAL DATA2. DIMENSIONS AND TECHNICAL DATA
2. DIMENSIONS AND TECHNICAL DATA
2.012.01
2.012.01
2.01 Dimensional data (see fig. 1 and table 2)Dimensional data (see fig. 1 and table 2)
Dimensional data (see fig. 1 and table 2)Dimensional data (see fig. 1 and table 2)
Dimensional data (see fig. 1 and table 2)
Fig. 1
a1a1
a1a1
a1 - Return 1" 1/2
a2a2
a2a2
a2 - flow 1" 1/2
a3a3
a3a3
a3 - Gas inlet 3/4"
a2
C
E
D
a1
a3
222
672
762
900
B
A
1000

Pegasus F2Pegasus F2
Pegasus F2Pegasus F2
Pegasus F2
4
2.022.02
2.022.02
2.02 Technical dataTechnical data
Technical dataTechnical data
Technical data
The standard cast-iron PEGASUS F2PEGASUS F2
PEGASUS F2PEGASUS F2
PEGASUS F2 boiler is set to operate on natural gas (G20).
The boiler is designed to operate with a flow temperature of 82°C and a maximum ∆t of 20°C.
Table 3
MODEL
GAS FLOW RATE
PILOT
INJECTORS
Ø mm
0,24
0,24
0,24
0,24
G.P.L. G31
No.
OF MAIN
BURNERS
3
4
5
6
GAS SUPPLY
PRESSURE
(mbars)
GAS PRESS. AT
BURNER MANIFOLD
(mbars)
Pegasus F2 51
Pegasus F2 68
Pegasus F2 85
Pegasus F2 102
MODEL
DIMENSIONS CONNECTIONS
Table 2
A
mm
550
640
720
800
B
mm
96,5
96,5
106,5
106,5
C
Ø mm
180
180
200
200
D
mm
43
46
44
42
E
mm
35
38
36
34
RETURN
a1 Ø
1 1/2"
1 1/2"
1 1/2"
1 1/2"
WEIGHT
INCLUDING
PACKAGE
Kg.
Pegasus F2 51
Pegasus F2 68
Pegasus F2 85
Pegasus F2 102
1 1/2"
1 1/2"
1 1/2"
1 1/2"
FLOW
a2 Ø
GAS
a3 Ø
3/4"
3/4"
3/4"
3/4"
MAX
OPERATING
PRESSURE
(bars)
4
4
4
4
WATER
CONTENT
(liter)
22
26
30
34
MODEL
Table 1
Pegasus F2 51
Pegasus F2 68
Pegasus F2 85
Pegasus F2 102
NUMBER OF
SECTIONS
4
5
6
7
HEAT INPUT
(GROSS)
kW
62,2
83
103,8
124,3
HEAT INPUT
(NETT)
kW
56
74,8
93,5
112
HEAT
OUTPUT
kW
51
68
85
102
260
300
350
400
15 to 23
15 to 23
15 to 23
15 to 23
Nat. G20
37
37
37
37
LPG G31
13,3
13,3
13,3
13,3
Nat. G20
36
36
36
36
LPG G31
5,9
7,9
9,9
11,8
Nat. G20
m
3
/h
4,34
5,79
7,24
8,68
LPG G31
kg/h
0,4
0,4
0,4
0,4
Nat. G20
PRINCIPALES
INJECTORS
Ø mm
2,15
2,15
2,15
2,15
G.P.L. G31
3,5
3,5
3,5
3,5
Nat. G20

5
Pegasus F2Pegasus F2
Pegasus F2Pegasus F2
Pegasus F2
1
89
7
2463
5
Control panelControl panel
Control panelControl panel
Control panel
Fig. 2b
Front view of the boiler without front casingFront view of the boiler without front casing
Front view of the boiler without front casingFront view of the boiler without front casing
Front view of the boiler without front casing
Fig. 2a
KeyKey
KeyKey
Key
11
11
1 Temperature-pressure gauge
22
22
2 Boiler control thermostat
33
33
3 Ignition lockout re-set botton
44
44
4 Boiler on/off switch
55
55
5 Flue gas safety thermostat
66
66
6 Limit thermostat reset botton
77
77
7 Ignition PCB
88
88
8 Electronic panel (not available UK)
1 2
4
13
14
10
12
9
816
11
15
6 3
75
2.032.03
2.032.03
2.03 Main componentsMain components
Main componentsMain components
Main components
99
99
9 Control panel
1010
1010
10 Gas valve
1111
1111
11 Pilot burner assembly
1212
1212
12 Gas burner manifold
1313
1313
13 Gas pressure test point
1414
1414
14 Automatic air vent
1515
1515
15 Drain cock
1616
1616
16 Flue gas sampling point

Pegasus F2Pegasus F2
Pegasus F2Pegasus F2
Pegasus F2
6
Fig. 3
2.042.04
2.042.04
2.04 Characteristic pressure drop curveCharacteristic pressure drop curve
Characteristic pressure drop curveCharacteristic pressure drop curve
Characteristic pressure drop curve
Water pressure drop in all models is shown in fig.
3. The following diagram shows the pressure drop
in the boiler as a function of the water flow rate.
12345678910
10
20
30
40
50
60
70
80
90
4 EL.
100
5 EL.
6 EL.
7 EL.
∆P mbar
Flow rate
200
2.052.05
2.052.05
2.05 Safe discharge of combustion productsSafe discharge of combustion products
Safe discharge of combustion productsSafe discharge of combustion products
Safe discharge of combustion products
The boiler comes with a FLUE GAS SAFETY THERMOSTAT, which provides a high level of safety and
control over the discharge of combustion products. This thermostat cuts off the supply of gas to the
burner in the event of a faulty flue draft.
If the FLUE GAS SAFETY THERMOSTAT has been activated, you should unscrew the protection cover
(part no. 5 in fig. 2a and 2b) and manually
“reset” the thermostat. After that, the boiler
will return to normal operation.
If the FLUE GAS SAFETY THERMOSTAT
needs to be replaced, use original
manufacturer’s parts only and make sure
the electric connections and positioning of
the bulb (see fig. 4) are correct; NEVER
UNDER ANY CIRCUMSTANCES LEAVE
THE FLUE GAS SAFETY THERMOSTAT
DISCONNECTED FROM THE ELECTRIC
CIRCUIT.
In case of frequent tripping of the thermo-
static switch, contact qualified personnel
only.
During cleaning of the draft diverter, be
careful not to damage the thermostat phial.
Flue gas safety
thermostat phial
Boiler rear viewBoiler rear view
Boiler rear viewBoiler rear view
Boiler rear view
Fig. 4

7
Pegasus F2Pegasus F2
Pegasus F2Pegasus F2
Pegasus F2
3. BOILER INSTALLATION3. BOILER INSTALLATION
3. BOILER INSTALLATION3. BOILER INSTALLATION
3. BOILER INSTALLATION
(To be performed by qualified personnel only)
3.013.01
3.013.01
3.01 General warningsGeneral warnings
General warningsGeneral warnings
General warnings
The boiler should be installed according to current regulations (see para 1.02).
We suggest fitting isolating valves between the boiler and the heating system to isolate the boiler from
the system if necessary.
The rise in temperature of the heating water (the difference between the water flow and return
temperatures) should not exceed 20°C. This is so as to prevent possible damage caused by
condensation forming in the boiler.
Combustion products should be discharged through a flue with a cross section in accordance with
current standards and not less than the boiler flue outlet connection.
Connect the gas to the boiler in accordance with current regulations. The diameter of the boiler gas
inlet gas pipe does not dictate the choice of diameter for the pipe between the boiler and the gas meter
should be calculated based upon its length and pressure drop.
3.023.02
3.023.02
3.02 Boiler water characteristicsBoiler water characteristics
Boiler water characteristicsBoiler water characteristics
Boiler water characteristics
When the water supply has a hardness of more than 25 - 30 Fr., it should be treated before entering
the heating system to prevent both scaling (caused by hard water) and corrosion (caused by aggressive
water) in the boiler. Please remember that because of their low thermal conductivity, even small scales
just a few millimetres thick cause the boiler walls to overheat considerably with serious consequences.
You must treat the water used for the heating system in the following cases:You must treat the water used for the heating system in the following cases:
You must treat the water used for the heating system in the following cases:You must treat the water used for the heating system in the following cases:
You must treat the water used for the heating system in the following cases:
A) Very large systems (with large volumes of water).A) Very large systems (with large volumes of water).
A) Very large systems (with large volumes of water).A) Very large systems (with large volumes of water).
A) Very large systems (with large volumes of water).
B) Systems where partial or complete draining - and water refilling - are frequent.B) Systems where partial or complete draining - and water refilling - are frequent.
B) Systems where partial or complete draining - and water refilling - are frequent.B) Systems where partial or complete draining - and water refilling - are frequent.
B) Systems where partial or complete draining - and water refilling - are frequent.

Pegasus F2Pegasus F2
Pegasus F2Pegasus F2
Pegasus F2
8
4. WIRING AND CONNECTION DIAGRAMS4. WIRING AND CONNECTION DIAGRAMS
4. WIRING AND CONNECTION DIAGRAMS4. WIRING AND CONNECTION DIAGRAMS
4. WIRING AND CONNECTION DIAGRAMS
4.014.01
4.014.01
4.01 Electrical connectionsElectrical connections
Electrical connectionsElectrical connections
Electrical connections
- Electrical connections should be performed according to the diagrams shown here.
- Connect the boiler to a single-phase, phase neutral, 230 V ~ 50 Hz power supply through a standard
terminal block or outlet with 2A max. fuses connected between the boiler and the power support.
Remember that the boiler should always be provided with good earthing.
IMPORTANT:IMPORTANT:
IMPORTANT:IMPORTANT:
IMPORTANT: If on use a 230 V room thermostat, it must be in II class.
The manufacturer disclaims any liability for damage to property or persons caused by
failure to earth the boiler correctly.
General wiring diagram for mod. 51-68-85General wiring diagram for mod. 51-68-85
General wiring diagram for mod. 51-68-85General wiring diagram for mod. 51-68-85
General wiring diagram for mod. 51-68-85
Fig. 5a
Note:Note:
Note:Note:
Note:
• Dotted lines indicate connections to be performed during installation.
• Terminals L1, N1, 6 are reserved for connecting an electronic compensator (not available in UK)
17
22
72
20
83
117
32
24
82
25
98
L
N
230V
50Hz
X3
X6
X4
X5
14
616
9
2
53 713
1
3
1
4
2
129
1
12
9
C
4
18
17
7
5
19
2
1
3
42
31
6
8
N1
L1
114
116
160
63
118
2
92
15
13
14
11
10
S 4561 B
HONEYWELL
21
16
49
4
169
21
3
KeyKey
KeyKey
Key
2424
2424
24 Spark electrode
2525
2525
25 Pilot burner
3232
3232
32 Pump (not supplied)
4949
4949
49 Limit thermostat (manual reset)
6363
6363
63 Boiler control thermostat
7272
7272
72 Room thermostat
8282
8282
82 Ionization probe
8383
8383
83 Ignition PCB
9292
9292
92 Flue gas thermostat
9898
9898
98 Boiler on/off switch
114114
114114
114 Water flow pressure switch
(not supplied)
116116
116116
116 Gas pressure switch
117117
117117
117 Main gas valve
118118
118118
118 Pilot light gas valve
129129
129129
129 Ignition lockout re-set botton
160160
160160
160 Auxiliary contact
169169
169169
169 Suppression filter

9
Pegasus F2Pegasus F2
Pegasus F2Pegasus F2
Pegasus F2
Electrical connections diagram for mod. 51-68-85Electrical connections diagram for mod. 51-68-85
Electrical connections diagram for mod. 51-68-85Electrical connections diagram for mod. 51-68-85
Electrical connections diagram for mod. 51-68-85
Fig. 5b
Note:Note:
Note:Note:
Note:
• Dotted lines indicate connections to be performed during installation.
• Terminals L1, N1, 6 are reserved for connecting an electronic compensator (not available in UK)
49
83
25 82
160114 117
118
129
32
3514220191817161514131211 2221987610
LN
2
2
4
LN
39 171425671
1
N1
230V
50Hz
72
L1
C
X4
X5
X6
N
X3
1
L
S 4561 B
HONEYWELL
3
13 16
63
24
92
116
2423
3
1
2
169
4
1
4
2
3
98
KeyKey
KeyKey
Key
2424
2424
24 Spark electrode
2525
2525
25 Pilot burner
3232
3232
32 Pump (not supplied)
4949
4949
49 Limit thermostat (manual reset)
6363
6363
63 Boiler control thermostat
7272
7272
72 Room thermostat
8282
8282
82 Ionization probe
8383
8383
83 Ignition PCB
9292
9292
92 Flue gas thermostat
9898
9898
98 Boiler on/off switch
114114
114114
114 Water flow pressure switch
(not supplied)
116116
116116
116 Gas pressure switch
117117
117117
117 Main gas valve
118118
118118
118 Pilot light gas valve
129129
129129
129 Ignition lockout re-set botton
160160
160160
160 Auxiliary contact
169169
169169
169 Suppression filter

Pegasus F2Pegasus F2
Pegasus F2Pegasus F2
Pegasus F2
10
12
11
10
9
C
78
13
114
116
160
24
X6
X5
9
253713
3
1
4
2
129 163
2
92
15
14
49
2
3
42
6
31
L
1
230V
50Hz
25
20
X3
X4
14
83
61617
1
19
22
118
21
117
S 4561 B
HONEYWELL 82
32
18
17
16
4
5N1
L1
98
4
169
21
3
N
General wiring diagram for mod. 102General wiring diagram for mod. 102
General wiring diagram for mod. 102General wiring diagram for mod. 102
General wiring diagram for mod. 102
KeyKey
KeyKey
Key
2424
2424
24 Spark electrode
2525
2525
25 Pilot burner
3232
3232
32 Pump (not supplied)
4949
4949
49 Limit thermostat (manual reset)
6363
6363
63 Boiler control thermostat
8282
8282
82 Ionization probe
8383
8383
83 Ignition PCB
9292
9292
92 Flue gas thermostat
9898
9898
98 Boiler on/off switch
114114
114114
114 Water flow pressure switch (not supplied)
116116
116116
116 Gas pressure switch
117117
117117
117 Main gas valve
118118
118118
118 Pilot light gas valve
129129
129129
129 Ignition lockout re-set botton
160160
160160
160 Auxiliary contact
169169
169169
169 Suppression filter
Fig. 5c
Note:Note:
Note:Note:
Note: Dotted lines indicate connections to be performed during installation.
Terminals L1, N1, 6 are reserved for connecting an electronic compensator (not available in
UK)