Ferroli PEGASUS F2 N 2S, PEGASUS F2 N 51 2S, PEGASUS F2 N 68 2S, PEGASUS F2 N 85 2S, PEGASUS F2 N 102 2S Instructions For Use, Installation And Maintenance
PEGASUS F2 N 2S
CAST IRON GAS BOILER
for heating with electronic
ignition and fl ame control
INSTRUCTIONS FOR USE,
INSTALLATION
AND MAINTENANCE
cod. 3544309/0 ediz. 01/2003
• Carefully read the warnings in this
instruction booklet since they provide
important information on safe installation, use and maintenance.
• This instruction booklet is an integral
part of the product and must be carefully
kept by the user for future reference.
• If the unit is sold or transferred to
another owner or if it is to be moved,
always make sure that the booklet
accompanies the boiler so that it can
be consulted by the new owner and/or
installer.
• Installation and maintenance must
be carried out by professionally qualifi ed personnel, according to current
regulations and the manufacturer’s
instructions.
• Incorrect installation or poor maintenance can cause damage or physical
injury. The manufacturer declines any
responsibility for damage caused by
errors in installation and use or by
failure to follow the manufacturer’s
instructions
• Before carrying out any cleaning or
maintenance operation, disconnect the
device from electrical power supply
using the switch and/or the special
cutoff devices.
• In case the unit breaks down and/or
functions poorly, deactivate it, do not
make any attempt to repair it or directly
intervene. Contact professionally
qualifi ed personnel.
• Any repair/replacement of products
must only be carried out by qualifi ed
professional personnel using exclusively
genuine parts. Failure to comply with
the above could affect the safety of
the unit.
• Yearly maintenance carried out by
qualified personnel is essential for
guaranteeing good operation of the
unit.
• This unit must only be used for the
purpose for which it was designed. Any
other use is considered improper and
therefore hazardous.
• After removing the packing, check the
integrity of the contents.
• Packing materials must not be left
within the reach of children as they are
potentially hazardous.
• In case of doubt do not use the unit,
and contact the supplier.
This symbol indicates “Caution”
and is placed next to all safety
warnings. Strictly follow these
instructions in order to avoid
danger and damage to persons,
animals and things.
This symbols calls attention to a
note or important notice
Certifi cation
The CE marking demonstrates that Ferroli
gas units conform to the requirements
contained in the applicable European
directives.
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Pegasus F2 N 2S
1. Operating instructions............................................................................4
1.1 Introduction.............................................................................................................4
1.2 Control panel ..........................................................................................................4
1.3 Turning on and off...................................................................................................5
1.4 Adjustments ............................................................................................................5
1.5 Maintenance............................................................................................................6
1.6 Anomalies................................................................................................................6
2. Installation ..............................................................................................7
2.1 General Instructions................................................................................................7
2.2 Place of installation .................................................................................................7
2.3 Plumbing connections.............................................................................................7
2.4 Gas connection .......................................................................................................8
2.5 Electrical Connections ............................................................................................9
2.6 Connection to the fl ue..........................................................................................10
2.7 Installing module generators................................................................................10
3. Service and maintenance......................................................................16
3.1 Adjustments ..........................................................................................................16
3.2 System start-up.....................................................................................................19
3.3 Maintenance..........................................................................................................20
3.4 Troubleshooting....................................................................................................24
4 Technical characteristics and data .........................................................26
4.1 Dimensions and connections ................................................................................26
4.2 General view and main components ....................................................................27
4.3 Technical data table ..............................................................................................28
4.4 Diagrams ...............................................................................................................29
4.5 Wiring diagrams....................................................................................................30
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Pegasus F2 N 2S
1. OPERATING INSTRUCTIONS
1.1 Introduction
Dear Customer,
Thank you for choosing Pegasus F2 N 2S, a FERROLI fl oor-standing boiler featuring advanced
design, cutting-edge technology, high reliability and quality construction. Please read this manual
carefully and keep it for future reference.
Pegasus F2 N 2S is a high-effi ciency heat generator for central heating running on natural or liquid gas
(confi gurable at installation time) and regulated by an advanced electronic control system.
The boiler shell consists of cast-iron elements whose particular shape guarantees high exchange
effi ciency under all operating conditions and an open-fl ue burner equipped with electronic ignition
and ionization fl ame control.
The boiler outfi t moreover includes an automatic boiler air vent valve, a 2-stage control thermostat,
a safety thermostat and fl ue thermostat.
Thanks to the electronic ignition and fl ame control system, unit operation is for the most part
automatic.
The user only has to set the system temperature by means of the control thermostat.
1.2 Control panel
To access the control panel, lift the front door.
1234567 8
Key
1 Arrangement for thermostatic controller
2 Boiler pressure thermometer
3 Manual reset safety thermostat cover
4 Flue thermostat cap
5 Plug
6 Flame control reset button with block light
7 2-stage boiler control thermostat
8 0 - 1 - TEST switch
fi g. 1
4
Pegasus F2 N 2S
1.3 Turning on and off
Ignition
• Open the gas valve ahead of the boiler.
• Turn on or insert any switch or plug ahead of the boiler
• Turn the boiler switch “8” onto 1 (Fig. 1).
• Turn knob “7” to the preselected temperature and any room thermostat to the desired temperature
value. At this point, the burner will light and the boiler begins to function automatically, controlled
by its adjustment and safety devices.
• If the boiler is equipped with an electronic thermostatic controller mounted at position 1 of Fig. 1,
the user must also take into account the manufacturer’s instructions.
If, after correctly carrying out the lighting procedure, the burners do not light and the pushbutton
light “6” comes on, wait about 15 seconds and then press the above-mentioned pushbutton.
The fl ame controller reset in this way will then repeat the ignition cycle. If the burners do not
light after a number of attempts, consult the anomalies paragraph.
In case of an electrical power failure while the boiler is working, the burners will go out and
re-ignite automatically when power is restored.
Turning off
Close the gas cock ahead of the boiler, turn knob “8” onto the 0 position and disconnect the
electrical power.
To avoid damage caused by freezing during long shutdowns in winter, it is advisable to drain all
water from the boiler and the system; or add a suitable antifreeze to the heating system.
The boiler switch “8” has 3 positions, “0-1-TEST”; the fi rst two have the on-off function, the third
(unstable) must only be used for service and maintenance purposes.
1.4 Adjustments
System temperature adjustment
Turn knob “7” (Fig. 1) clockwise to increase the heating water temperature, turn anticlockwise to
decrease it. The temperature can be varied from a minimum of 30°C to a maximum of 90°C. However,
it is advisable not to operate the boiler below 45°C.
Room temperature adjustment (with optional room thermostat)
Using the room thermostat, set the temperature desired in the rooms. Controlled by the room
thermostat, the boiler lights and delivers water to the system at the temperature set by boiler
adjustment thermostat “7” (Fig. 1). The generator turns off when the desired temperature in
the rooms is reached.
If the room thermostat is not installed the boiler will keep the system at the temperature set
by the boiler control thermostat.
Water system pressure adjustment
The fi lling pressure with system cold, read on boiler hydrometer (detail 2 in Fig.1), must be about 1.0 bar.
If, during operation, the system pressure falls (caused by the evaporation of gas dissolved in the water) to
values below the minimum described above, the user must bring it back to the initial value by operating
the fi lling cock. At the end of the operation always close the fi lling cock.
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Pegasus F2 N 2S
1.5 Maintenance
The user must have the heating system serviced by qualifi ed personnel at least once a year and combustion
checked at least every two years. Consult chapter 3.3 of this manual for more information.
The boiler casing, panel and aesthetic parts can be cleaned with a soft damp cloth, possibly soaked in
soapy water. Do not use any abrasive detergents and solvents.
1.6 Anomalies
Listed below are the anomalies that can be caused by simple, user-solvable problems.
Before calling the assistance service, check that the problem is not due to there being no
gas or electricity.
Symbol Fault Cure
Boiler blocked by the flame controller
Boiler shutdown due to insufficient system
pressure (only if a water pressure switch is
installed on the system)
Boiler shutdown due to insufficient
combustion products evacuation.
Boiler shutdown due to water
overtemperature
Make sure that the gas cocks ahead of the boiler and on the meter
are open.
Press the lit pushbutton-indicator light.
In case of repeated shutdowns, contact the nearest assistance centre.
Fill the system to 1-1.5 bar cold by means of the system filling cock.
Close the cock after use.
Unscrew flue thermostat cover and press the button below.
In case of repeated shutdowns, contact the nearest assistance
centre.
Unscrew the safety thermostat cover and press the button below.
In case of repeated shutdowns, contact the nearest assistance centre.
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Pegasus F2 N 2S
2. INSTALLATION
2.1 General Instructions
This device must only be used for the purpose for which it is specially designed.
This unit is designed to heat water to a temperature below boiling point at atmospheric
pressure and must be connected to a heating system and/or a water supply system for
domestic use, compatible with its performance, characteristics and its heating capacity.
Any other use is considered improper.
THE BOILER MUST ONLY BE INSTALLED BY QUALIFIED PERSONNEL, IN ACCORDANCE WITH ALL
THE INSTRUCTIONS GIVEN IN THIS TECHNICAL MANUAL, THE PROVISIONS OF CURRENT LAW,
ANY LOCAL REGULATIONS AND THE RULES OF PROPER WORKMANSHIP.
Incorrect installation can cause damage or physical injury for which the manufacturer declines
any responsibility.
2.2 Place of installation
This unit is an “open chamber” type and can only be installed and operated in permanently ventilated
rooms. An insuffi cient fl ow of combustion air to the boiler will affect its normal operation and fume
evacuation. Also, the fumes forming under these conditions (oxides) are extremely harmful to health
if dispersed in the domestic environment.
Therefore the place of installation must be free of dust, fl ammable materials or objects or corrosive
gases. The room must be dry and not subject to freezing.
When positioning the boiler, leave suffi cient space around it for normal maintenance activities.
2.3 Plumbing connections
The heating capacity of the unit should be previously established by calculating the building’s heat
requirement according to current regulations. For good operation and long life of the boiler, the
plumbing system must be well proportioned and always complete with all those accessories that
guarantee regular operation and running.
If the delivery and return pipes follow a path where air pockets could form in certain places, it is
advisable to install vent valves at these points. Also, install a discharge device at the lowest point in
the system to allow its complete emptying.
If the boiler is installed at a lower level than the system, it is advisable to provide a fl ow-stop valve to
prevent the natural circulation of system water.
The temperature drop between the delivery manifold and the return to the boiler should not
exceed 20°C.
Do not use the water system pipes to earth electrical appliances.
Before installation, carefully wash all the pipes of the system to remove residues or impurities that
could affect the unit’s good working.
Make the connections to the corresponding connections as shown in Fig. 2.
7
Pegasus F2 N 2S
It is advisable to install on-off valves between the boiler
Rear View
and heating system allowing the boiler to be isolated
from the system if necessary.
Make the boiler connection in such a way that its
internal pipes are free of stress.
Type and model
Pegasus F2 N 51 2S
Pegasus F2 N 68 2S
Pegasus F2 N 85 2S
Pegasus F2 N 102 2S
B
550
640
720
800
C
180
180
200
200
43
46
44
42
a2
Delivery
Heating
1” 1/2
1” 1/2
1” 1/2
1” 1/2
35
38
36
34
a1
E
Return
Heating
1” 1/2
1” 1/2
1” 1/2
1” 1/2
D
a3
Inlet
gas
3/4”
3/4”
3/4”
3/4”
B
fi g. 2
Characteristics of the water system
In the presence of water harder than 25° Fr, we recommend the use of suitably conditioned water in order
to avoid possible scaling in the boiler, caused by hard water, or corrosion produced by aggressive water.
It should be remembered that, because of its low thermal conductivity, even scaling of just a few mm thick
causes signifi cant overheating of the boiler walls with consequent serious problems.
Water treatment is indispensable in the case of very large systems (containing large amounts of water) or
with frequent introduction of replenishing water in the system. If partial or total emptying of the system
becomes necessary under these conditions, it is advisable to refi ll it with treated water.
Filling boiler and system
The fi lling pressure with system cold system must be about 1 bar. If, during operation, the system
pressure falls (caused by evaporation of gas dissolved in the water) to a value below the minimum
described above, the user must bring it back to the initial value. For correct operation of the boiler,
when hot, its pressure must be about 1.5-2 bar.
2.4 Gas connection
Before making the connection, ensure that the unit is arranged for operation with the type of
fuel available and carefully clean all the pipes of the gas system to remove any residues that
could affect good functioning of the boiler.
The gas must be connected to the relative connector (see Fig. 2) in conformity with current standards,
with rigid metal pipes or with continuous fl exible s/steel wall tubing, placing a gas cock between the
system and the boiler. Make sure that all the gas connections are tight.
The capacity of the gas meter must be suffi cient for the simultaneous use of all equipment connected
to it. The diameter of the gas pipe leaving the boiler does not determine the diameter of the
pipe between the unit and the meter; it must be chosen according to its length and loss of head,
in conformity with current standards.
Do not use the gas pipes to earth electrical appliances.
8
Pegasus F2 N 2S
2.5 Electrical Connections
Connection to the electrical grid
The boiler must be connected to a single-phase, 230 Volt-50 Hz electric line.
The unit’s electrical safety is only guaranteed when correctly connected to an effi cient earthing
system executed according to current safety standards. Have the effi ciency and suitability of
the earthing system checked by professionally qualifi ed personnel. The manufacturer is not
responsible for any damage caused by failure to earth the system. Also make sure that the
electrical system is adequate for the maximum power absorbed by the unit, as specifi ed on
the boiler dataplate, in particular ensuring that the section of the system’s cables is suitable
for the power absorbed by the unit.
The boiler is prewired and supplied with a connector located inside the control panel, arranged for
connection to an electronic thermostatic controller (see wiring diagrams in paragraph 4.5). In addition,
it is equipped with a three-pole cable for connection to the electricity line. The mains connections
must be made with a permanent connection and equipped with a bipolar switch whose contacts have
a minimum opening of at least 3 mm, interposing fuses of max. 3A between the boiler and the line. It
is important to respect the polarities (LINE: brown wire / NEUTRAL: blue wire / EARTH: yellow-green
wire) in making connections to the electrical line.
Access to the electrical terminal board and internal components of the
control panel
To access the electrical components inside the control panel, follow the sequence in
Fig. 3 - 4 - 5 - 6.
The layout of the terminals for the various connections is given in the wiring diagrams in the
technical data chapter.
Fig. 3 - Unscrew the 2 self-tapped screws holding
the boiler cover.
Fig. 5 - Unscrew and take out the two screws and both
plates holding the control panel.
Fig. 4 - Lift by pressing upwards and take off the cover
that is held at the sides of the boiler by pins.
Fig. 6 - Turn the control panel forwards.
9
Pegasus F2 N 2S
40 cm max.
System delivery
System return
Any additional sensitive elements of the system’s control
and safety devices, temperature sensor, pressure
switch, thermostat bulb, etc., must be located on the
delivery pipe within 40 cm. of the rear wall of the
boiler casing (see Fig. 7).
fi g. 7
2.6 Connection to the fl ue
The diameter of the fl ue connection pipe must not be less than that of the connection on the
anti-backfl ow device. Starting from the anti-backfl ow device it must have a vertical section at least
50 cm long. Current standards must be complied with regarding the dimensioning and installation
of the fl ues and connection pipe.
The diameters of the anti-backfl ow device collars are given in the table of Fig. 2.
2.7 Installing module generators
INSTALLATION MUST ONLY BE PERFORMED BY QUALIFIED PERSONNEL, IN ACCORDANCE WITH
ALL THE INSTRUCTIONS GIVEN IN THIS TECHNICAL MANUAL, THE PROVISIONS OF CURRENT
LAW, THE PRESCRIPTIONS OF UNI AND CEI STANDARDS, ANY LOCAL REGULATIONS AND THE
RULES OF PROPER WORKMANSHIP.
General Warnings
It is advisable to install on-off valves between the boiler (module) and the system allowing the
boiler to be isolated from the system if necessary. In this case each boiler must be fi tted with a
safety valve operating on the delivery pipe.
If the delivery and return pipes follow a path where air pockets could form in certain places, it is
advisable to install vent valves at these points.
The heating water temperature drop, the difference between the system delivery and return temperature,
must be lower than 20°C. To prevent condensation in the boiler and the associated damage.
Evacuate the products of combustion by means of a fl ue, whose cross-section must conform to current
standards and anyhow be no less than that of the coupling to the module generator fume manifold. If it is
wished to use manifolds to discharge the fumes, see the charts of Fig. 8 and 9.
All the couplings between the boiler and the fl ue must be airtight.
The capacity of the gas meter must be suffi cient for the simultaneous use of all the generators
connected to it.
Make the various boiler connections in such a way that their pipes are free of mechanical stress.
Make the gas connections of the single generators in accordance with current regulations.
10
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