General Instructions; Place Of Installation; Plumbing Connections; Gas Connection - Ferroli PEGASUS 2S Série Mode D'emploi

PEGASUS 67 ÷ 107 2S
2.5 Faults
Listed below are faults that can be caused by simple, user-solvable problems.
Symbol Faults
Boiler shutdown by the flame controller
Boiler shutdown due to insufficient sys-
tem pressure (only if a pressure switch
is installed in the system)
Boiler shutdown due to insufficient evac-
uation of fumes
Boiler shutdown due to water overtem-
perature
Before calling the after-sales service, check that the problem is not due to no
A
gas or electricity.
3. INSTALLATION

3.1 General Instructions

This unit must only be used for its intended
B
purpose.
This unit is designed to heat water to a tem-
perature below boiling point at atmospheric
pressure and must be connected to a heating
system and/or a water supply system for do-
mestic 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 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 the current regulations. To ensure proper operation
and long boiler life, the plumbing system must be adequately sized and complete with all
the necessary accessories.
If the delivery and return pipes follow a path where air pockets can 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 flow-
stop valve to prevent the natural circulation of water in the system.
The temperature difference between the delivery manifold and the return to the boiler
should not exceed 20°C.
Do not use the water system pipes to earth
B
electrical appliances.
Before installation, carefully clean all the system pipes to remove any residuals or impu-
rities that could affect proper operation of the unit.
Carry out the relevant connections as indicated in .
It is advisable to install shut-off valves between the boiler and heating system allowing
the boiler to be isolated from the system if necessary.
Cure
Make sure the gas cocks ahead of the boiler and on
the meter are open.
Press the lit pushbutton-indicator.
In case of repeated shutdowns, contact the nearest
service centre.
Fill the system to 1-1.5 bar cold by means of the sys-
tem filling cock.
Close the cock after use.
Unscrew the fume thermostat cover and press the
button below.
In case of repeated boiler shutdowns, contact the
nearest service centre.
Unscrew the safety thermostat cover and press the
button below.
In case of repeated boiler shutdowns, contact the
nearest service centre.
cod. 3540S434 - Rev. 00 - 10/2020
Make the boiler connection in such a way that
B
its internal pipes are free of stress.
Water system characteristics
In the presence of water harder than 25° Fr, it is advisable to use suitably treated water,
in order to avoid possible scaling in the boiler caused by hard water, or corrosion pro-
duced by aggressive water. Due to its low thermal conductivity, scaling even just a few
mm thick causes significant overheating of the boiler walls with consequent serious prob-
lems.
Water treatment is indispensable in case of very large systems (containing large
amounts of water) or with frequent introduction of replenishing water in the system. If par-
tial or total emptying of the system becomes necessary in these cases, it is advisable to
refill with treated water.
Filling boiler and system
The filling pressure with system cold system must be approx. 1 bar. If, during operation,
the system pressure falls (due to the evaporation of gases dissolved in the water) to val-
ues below the minimum described above, the user must bring it to the initial value. For
correct operation of the boiler, when hot, its pressure must be approx. 1.5-2 bar.

3.4 Gas connection

Before carrying out the connection, make sure
B
the unit is arranged for using the type of fuel
available and carefully clean all the pipes of
the gas system to remove any residues that
could affect proper boiler operation.
The gas must be connected to the relevant connection (see fig. 11) in conformity with
current standards, with a rigid metal pipe or with a continuous surface flexible s/steel
tube, installing a gas cock between the system and boiler. Make sure all the gas connec-
tions are tight.
The capacity of the gas meter must be sufficient for the simultaneous use of all equip-
ment 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 pressure losses, in conformity with the current regulations.
Do not use the gas pipes to earth electrical ap-
B
pliances.

3.5 Electrical connections

Connection to the power supply
The boiler must be connected to a single-phase, 230 Volt-50 Hz electric line.
The unit's electrical safety is guaranteed only
B
when it is correctly connected to an efficient
earthing system in conformity with the current
safety regulations. Have the efficiency and
suitability of the earthing system checked by
professionally qualified personnel; the Manu-
facturer declines any liability for damage
caused by failure to earth the system. Also
make sure the electrical system is adequate
for the maximum power absorbed by the unit,
as specified on the boiler dataplate, in partic-
ular ensuring that the section of the system's
cables is suitable for the input.
The boiler is prewired and supplied with a connector located inside the control panel, ar-
ranged for connection to an electronic thermostatic controller (see wiring diagrams in
sec. 5.5). It is also equipped with a three-core cable for connection to the electric line.
The connections to the power supply must be made with a permanent connection and
equipped with a double-pole switch with contact gap of at least 3 mm, interposing fuses
of max. 3A between the boiler and line. It is important to respect the polarities (LINE:
brown wire / NEUTRAL: blue wire / EARTH : yellow/green wire) when making the con-
nections to the electric line.
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EN