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EN
EN
1. GENERAL INSTRUCTIONS
•
Carefully read the instructions contained in this instruction booklet.
•
After boiler installation, inform the user regarding its operation and give him this manual, which is an integral
and essential part of the product and must be kept with care for future reference.
•
Installation and maintenance must be carried out by professionally qualified personnel, according to current
regulations and the manufacturer's instructions. Do not carry out any operation on the sealed control parts.
•
Incorrect installation or inadequate maintenance can result in damage or injury. The Manufacturer declines
any liability for damage due to errors in installation and use or failure to follow the instructions.
•
Before carrying out any cleaning or maintenance operation, disconnect the unit from the power supply using
the system switch and/or the special cut-off devices.
•
In case of a fault and/or poor operation, deactivate the unit and do not attempt to repair it or directly intervene.
Contact professionally qualified personnel. Repair/replacement of the products must only be carried out by
professionally qualified using original spare parts. Failure to comply with the above could affect the safety of
the unit.
•
This unit must only be used for its intended purpose. Any other use is considered improper and therefore
dangerous.
•
The packing materials are potentially hazardous and must not be left within the reach of children.
•
The images given in this manual are a simplified representation of the product. In this representation there
may be slight and insignificant differences with respect to the product supplied.
2. OPERATING INSTRUCTIONS
2.1 Introduction
Dear Customer,
Thank you for choosing PEGASUS LN 2S, a floor-standing boiler FERROLI featuring advanced
design, cutting-edge technology, high reliability and quality construction. Please read this manual
carefully and keep it for future reference.
PEGASUS LN 2S is a high-efficiency heat generator with low NOx emissions for central heating,
running on natural gas or liquefied gas, equipped with an advanced electronic control system.
The boiler shell consists of cast iron elements whose particular shape guarantees high exchange
efficiency in all operating conditions and an open-flue burner equipped with electronic ignition and
ionisation flame control.
Partial (1st stage) or total (1st + 2nd stage) burner ignition enables the unit to supply two separate
outputs according to system requirements.
The boiler also has an automatic boiler air vent valve, a 2-stage control thermostat and a safety
thermostat.
Thanks to the electronic ignition and flame control system, unit operation is for the most part auto-
matic.
The user only has to set the system temperature by means of the control thermostat.
2.2 Control panel
To access the control panel, lift the front door.
fig. 1 - Control panel
Key
1
Arrangement for thermostatic controller
2
Boiler pressure/temperature gauge
3
Manual reset safety thermostat cover
4
Manual reset fume thermostat cover
5
Flame controller reset button with 1st stage shutdown indicator
6
Flame controller reset button with 2nd stage shutdown indicator
7
2-stage boiler control thermostat
8
0 - 1 - TEST switch
2.3 Turning on and off
Lighting
•
Open the gas cock ahead of the boiler.
•
Turn on or insert any switch or plug ahead of the boiler.
•
Turn the boiler switch “8” to 1 (fig. 1).
•
Turn the knob "7" to the required temperature and that of a possible room thermostat to the
required temperature value. The burner will light and the boiler begins to function automati-
cally, controlled by its adjustment and safety devices.
•
If the boiler is equipped with an electronic thermostatic controller fitted in position 1 of fig. 1,
the user must also take into account the manufacturer's instructions.
A
If, after correctly carrying out the lighting procedures, the burners do not light and but-
tons-shutdown indicator "5 - 6" come on, wait about 15 seconds then press the above-
mentioned buttons. The flame controllers reset in this way will repeat the lighting cycle.
If the burners do not light after several attempts, consult the faults section.
A
In case of a power failure while the boiler is working, the burners will go out and relight
automatically when the power is restored.
Turning off
Close the gas cock ahead of the boiler, turn knob "8" to 0 and disconnect the power.
B
To avoid damage caused by freezing during long shutdowns in winter, it is ad-
visable to drain all water from the boiler and system; or add a suitable antifreeze
to the heating system.
The boiler switch 8 has 3 positions “0-1-TEST”; the first two have the on-off
function, the third (unstable) must only be used for service and maintenance
purposes.
2.4 Adjustments
System temperature adjustment
Turn the knob 7 of fig. 1 clockwise to increase the heating water temperature, or anti-
clockwise 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 required temperature in the rooms. By command of
the room thermostat, the boiler lights and brings the system water to the temperature set
by boiler adjustment thermostat 7 of fig. 1. The generator turns off when the required
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 filling pressure with system cold, read on the boiler water gauge detail 2 of fig. 1,
must be approx. 1.0 bar. If, during operation, the system pressure falls (due to the evap-
oration of gases dissolved in the water) to values below the minimum described above,
the user must bring it to the initial value by operating the filling cock. At the end of the
operation always close the filling cock.
2.5 Faults
Given below are faults that can be caused by simple, user-solvable problems.
A
Before calling the assistance service, check that the problem is not due to no
gas or electricity.
3. INSTALLATION
3.1 General Instructions
B
This unit must only be used for its intended purpose.
This unit is designed to heat water to a temperature below boiling point at at-
mospheric pressure and must be connected to a heating system and/or a water
supply system for domestic use, compatible with its performance, characteris-
tics and its heating capacity. Any other use is considered improper.
THE BOILER MUST ONLY BE INSTALLED BY QUALIFIED PERSONNEL, IN AC-
CORDANCE WITH ALL THE INSTRUCTIONS GIVEN IN THIS TECHNICAL MANUAL,
THE PROVISIONS OF CURRENT LAW, ANY LOCAL REGULATIONS AND THE
RULES OF PROPER WORKMANSHIP.
The Manufacturer declines any liability for damage or injury caused by incorrect installa-
tion.
3.2 Place of installation
This unit is an “open chamber” type and can only be installed and operated in perma-
nently ventilated rooms. An insufficient flow of combustion air to the boiler will affect its
normal operation and fume evacuation. Also, the fumes forming in these conditions (ox-
ides) are extremely harmful to the health if dispersed in the domestic environment.
Therefore the place of installation must be free of dust, flammable materials or objects
or corrosive gases. The room must be dry and not subject to freezing.
When positioning the boiler, leave sufficient space around it for normal maintenance ac-
tivities.
3.3 Plumbing connections
Important
The heating capacity of the unit must be previously established by calculating the build-
ing's heat requirement according to current regulations. For proper operation and long
life of the boiler, the plumbing system must be adequate and always complete with all
the accessories that guarantee regular operation and running.
1
2
3
5 6
7
8
4
Symbol
Fault
Cure
Boiler shutdown by the flame controller
Make sure the gas cocks ahead of the boiler and on the
meter are open.
Press the lit pushbutton-indicator.
In case of repeated boiler shutdowns, contact the nearest
service centre.
Boiler shutdown due to insufficient sys-
tem pressure (only if a pressure switch
is installed in the system)
Fill the system to 1-1.5 bar cold by means of the system fill-
ing cock.
Close the cock after use.
Boiler shutdown due to insufficient
evacuation of fumes
Unscrew the fume thermostat cover and press the button
below.
In case of repeated shutdowns, contact the nearest service
centre.
Boiler shutdown due to water overtem-
perature
Unscrew the safety thermostat cover and press the button
below.
In case of repeated shutdowns, contact the nearest service
centre.
PPEGASUS LN 2S
cod. 3540S242 - Rev. 03 - 04/2018
