Fondital BALI RTN Series Quick start guide

BALI RTN
IST 03 C 358 - 01
INSTALLATION, USE
AND MAINTENANCE
EN

Dear Customer,
Thank you for choosing and buying one of our boilers. Please read these instructions carefully in order to install, operate,
and maintain this equipment properly.
2

This INSTRUCTION BOOKLET is an
integral and essential part of this
product and must be handed to the
user by the installer for safekeeping
and consultation when necessary.
This instruction booklet is to be
handed over with the equipment
should it be sold or transferred.
The boiler must only be used for
the purposes that are expressly
foreseen. Any other use is to be
considered improper and therefore
dangerous.
The installation must be carried out in
compliance with current standards
and following the manufacturer’s
instructions contained in this booklet.
Incorrect installation may result in
harm to people, animals, and/or
property, and the manufacturer
accepts no responsibility for such
damage.
The unit must be installed in a room
that is sufficiently well ventilated,
in compliance with current
standards and laws.
The Manufacturer does not accept
any contractual or extra-contractual
responsibility for any damage caused
due to errors in installation or
operation, or resulting from failure to
follow the instructions below.
Before installing this equipment make
sure that the technical data for the
unit meet the requirements for its
proper use in the plant.
Also check that the equipment is
complete and that it has not been
damaged in transit or during
handling.
Do not install any equipment that is
clearly damaged and/or defective.
Do not obstruct the air intake and/or
heat dissipation grilles.
For all equipment with optional extras
or kits (including electrical ones), only
original accessories must be used.
When installing the equipment do
not throw the packing away. All the
materials can be recycled and must
be taken to specific separated
collection areas.
Keep the packing out of reach of
children, as, by its very nature, it may
constitute a source of danger.
Should the equipment break down
and/or function defectively, switch it
off and do not attempt to repair it
yourself. Call in only qualified
personnel.
Any repairs to this product must be
made using only original spare parts.
Failure to comply with the above may
compromise the safety of the
equipment and expose people,
animals, and property to danger.
The owner is obliged to have
routine maintenance carried out
on the equipment once a year, as
indicated in the programme given
in the relevant section of this
booklet, in order to ensure that it
works efficiently and correctly.
Where the equipment is not to be
used for an extensive period of time,
disconnect it from the electrical
power supply and shut the fuel
stopcock.
Where there is a danger of freezing,
add antifreeze. Draining the system is
not recommended as this may
damage the overall system. For this
purpose use non-freeze products
specifically made for multi-metal
heating equipment.
IMPORTANT
For equipment powered by gas fuel, if
you smell gas in the area, proceed as
follows:
- Do not activate any electric
switches or start any electric
equipment.
- Do not light any flames and do not
smoke.
- Shut the central gas stopcock.
- Open all doors and windows.
- Contact a Service Centre, qualified
installer, or the gas supply
company.
Using naked flames to check for
gas leaks is completely forbidden.
GENERAL NOTES FOR THE USER AND THE INSTALLER
ATTENTION
This unit is built for installation in the destination Country specified on
the technical data plate.
Installation in any country other than that indicated may pose a danger
to people, animals, or property.
3

CONTENTS
Warnings ............................................................................................................................................................................................... page 2
General notes for the installer, maintenance technician and user............................................................................................................ page 3
1 Instructions for the user..............................................................................................................................................page 5
1.1 Control panel ............................................................................................................................................................................................... page 5
1.2 Operating the boiler...................................................................................................................................................................................... page 6
1.2.1 Switching on ...................................................................................................................................................................................... page 6
1.2.2 Switching off...................................................................................................................................................................................... page 6
1.2.3 Burner cut-out................................................................................................................................................................................... page 6
1.2.4 Cut-Out do to overheating........................................................................................................................................................... page 6
1.2.5 Cut-Out due to incorrect draught on the flue....................................................................................................................... page 7
1.2.6 Cut-Out due to insufficient gas pressure (RTN 70/RTN 100)............................................................................................ page 7
1.3 Maintenance ............................................................................................................................................................................................... page 7
1.4 Notes for the User .......................................................................................................................................................................................... page 7
2 Technical characteristics and dimensions .................................................................................................................page 8
2.1 Technical characteristics .............................................................................................................................................................................. page 8
2.2 Dimensions ............................................................................................................................................................................................... page 9
2.3 Technical data ............................................................................................................................................................................................... page 10
3 Instructions for the Installer .......................................................................................................................................page 12
3.1 Installation standards ................................................................................................................................................................................... page 12
3.2 Installation ............................................................................................................................................................................................... page 12
3.2.1 Packaging............................................................................................................................................................................................ page 12
3.2.2 Choosing where to install the boiler......................................................................................................................................... page 12
3.2.3 Installing the boiler ......................................................................................................................................................................... page 12
3.2.4 Ventilation of boiler rooms........................................................................................................................................................... page 12
3.2.5 Flue gas system ................................................................................................................................................................................ page 12
3.2.6 On-site measurement of combustion efficiency.................................................................................................................. page 12
3.2.7 Connecting to the gas mains....................................................................................................................................................... page 13
3.2.8 Connecting to the electrical mains ........................................................................................................................................... page 13
3.2.9 Plumbing connections................................................................................................................................................................... page 13
3.2.10 Installation of original kits.......................................................................................................................................................... page 13
3.3 Preliminary checks...................................................................................................................................................................................... page 13
3.4 Starting the boiler ...................................................................................................................................................................................... page 14
3.4.1 Preliminary checks........................................................................................................................................................................... page 14
3.4.2 Starting up and switching off...................................................................................................................................................... page 14
3.5 Wiring diagrams.......................................................................................................................................................................................... page 14
3.5.1 General layout ................................................................................................................................................................................... page 15
3.5.2 Topographycal diagrams............................................................................................................................................................... page 17
3.6 Gas Conversions.......................................................................................................................................................................................... page 19
3.6.1 Conversion from natural gas to LPG. ........................................................................................................................................ page 19
3.6.2 Conversion from LPG to natural gas ......................................................................................................................................... page 19
4 Maintenance .........................................................................................................................................................page 19
4

Main lit switch (green) (1)
When the switch is in the 0 position
the boiler is switched off and the
switch is not lit.
When the switch is in the I position
the boiler is switched on and the
switch is lit.
Reset button (2)
When the reset button is pressed the
boiler is restarted.
Temperature adjustment for the
heating water (3)
This knob is used to set the
temperature for the water in the
heating system. It can be set between
a minimum of 45°C and a maximum
of 85°C.
Heating function LED (yellow) (4)
This LED indicates that the system is
calling for heating.
Overheating cut-out LED (red) (5)
This light indicates that the cut-out
connected to the safety thermostat
has tripped due to malfunctioning. It
must be reset manually.
Cut-out LED (red) (6)
(On all models) This light indicates
that the flue gas safety device has
tripped due to a lack of draught on
the flue (albeit only temporary) or low
gas supply pressure (for models RTN
70 to RTN 100). It must be reset
manually.
Burner cut-out LED (red, only “E”
models) (7)
This light indicates that the burner
safety device has tripped due to a
malfunction.
Burner operation LED (yellow) (8)
This light indicates that the burner is
operating.
Thermometer or pressure gauge
(9)
The thermometer’s function is to
indicate the temperature of the water
in the boiler, while the thermometer /
pressure gauge is used to indicate the
pressure as well.
Safety thermostat manual reset
(10)
The safety thermostat is used to
protect the boiler in case of a fault.
The thermostat reset button can be
accessed by removing the protective
cover.
1. INSTRUCTIONS FOR THE USER
1.1 CONTROL PANEL
1. General switch with line light (green)
2. Reset button
3. Temperature adjustment for the
heating water
4. Heating pump operation light
(yellow)
5. Overheating cut-out LED (red)
6. LED to indicate cut-out due to no
draught on the flue or low gas
pressure (low gas pressure for models
RTN 70 to 100)
7. Burner cut-out LED (only “E” models)
8. Burner operation LED (yellow)
9. Water thermometer (models RTN 18
to RTN 48) or thermometer/pressure
gauge (for models RTN 60 to RTN 100
and all PV models)
10. Safety thermostat manual reset
fig. 1
5

1.2 Operating the boiler (fig. 1)
1.2.1 Switching on
For “E” models:
*Open the fuel stopcock.
* Switch the boiler’s main switch 1to the
ON position (the switch lights up).
• Turn the heating water temperature
adjustment knob 3to set the temperature
required for the heating system.
• Set the ambient temperature using the
ambient thermostat (if there is one).
• When the heating system calls for heat
the heating request light 4comes on.
• When the burner is operating, the
burner operation light 8comes on.
For models with a thermoelectric
valve:
• Open the fuel stopcock.
• Make sure that the main switch is in the
OFF position (the switch is not lit up).
• Remove the front panel on the boiler.
This allows access to the gas valve and
the piezoelectric device and the pilot
burner can be switched on.
• Turn the cover over the pilot burner so
that it can be seen through the relevant
hole.
• Pushing the gas valve knob gently,
rotate it anti-clockwise from the • (off )
position to the (pilot) position.
• Hold the knob down and push the piezo
until the pilot burner is burning.
• Hold the knob down for about 20
seconds.
• After releasing the knob turn it
anticlockwise to the (main burner)
position.
• Put the cover plate for the pilot burner
back in its original position.
• Replace the front panel on the boiler.
• Switch the boiler’s main switch 1to the
ON position (the switch lights up).
• Turn the heating water temperature
adjustment knob 3to set the temperature
required for the heating system.
• Set the ambient temperature using the
ambient thermostat (if there is one).
• When the heating system calls for heat
the heating request light 4 comes on.
• When the burner is operating, the
burner operation light 8comes on.
Please Note: When igniting the burner
after the boiler has been out of use for a
long period of time, especially in the case
of LPG boilers, there may be airlocks in
the pipes.
The boiler’s burner may cut-out a few
times. Restart the burner using the reset
button (see the following paragraphs).
1.2.2 Switching off
For “E” models:
Set the main switch on the OFF position
(the switch is not lit up). If necessary, shut
the fuel stopcock.
For models with a thermoelectric valve
On these models, when the main switch
is on the OFF position (switch not lit up)
the main burner is extinguished but the
pilot burner stays alight.
If you wish to extinguish the pilot burner
as well, after setting the main switch to
the OFF position, remove the boiler’s
front panel and turn the gas valve knob
to the • (off ) position by turning it
clockwise.
1.2.3 Burner cut-out
When any functioning faults arise the
boiler’s burner cuts out automatically.
On “E” models the cut-out light 7comes
on. Should this happen, proceed as
follows:
• First check the fuel supply, make sure
that the gas stopcock is open and that
the gas mains have gas in them by
lighting a cooking ring in the kitchen, for
example.
• Having checked the fuel supply, reset
the burner by pushing the reset button 2
on the control panel.
Models with a thermoelectric valve do
not have any cut-out indication light.
The boiler must be re-ignited as per
instructions given in paragraph 1.2.1 and
this can only be done 60 seconds after it
has gone out (automatic safety device).
If the equipment does not restart and
cuts out again, after trying three times
contact a Service Centre or qualified
personnel to carry out maintenance.
If the burner cuts out frequently this is a
sign that there is an ongoing operating
fault.
Contact qualified personnel or a Service
Centre for maintenance.
1.2.4 Cut-out do to overheating
Should the red cut-out light 5indicating
overheating come on, this means that the
safety thermostat cut-out has tripped
and must be reset manually. This is due to
an operating fault and a Service Centre or
qualified personnel must be contacted
for maintenance.
6

1.2.5 Cut-out due to incorrect draught
in the flue
Should conditions arise that lead to a
faulty draught in the flue, the boiler cuts
out and red light 6comes on.
To restart the boiler proceed as follows:
• Switch the boiler’s main switch 1to the
0position (the boiler is switched off and
the switch is not lit up).
• Remove the front panel on the boiler.
• Push the button on the thermostat that
checks proper evacuation of flue gas (fig.
2).
• Replace the front panel on the boiler.
• Switch the boiler’s main switch 1 to the
Iposition (the boiler is switched on and
the switch is lit up).
WARNING
If after resetting the boiler does not
start working properly again and cuts
out again, contact qualified personnel
or a Service Centre for maintenance.
1.2.6 Cut-out due to insufficient gas
pressure (on models RTN 70 to RTN
100)
Should the gas supply pressure be
insufficient, the boiler does not start up
and red light 6lights up.
If the unit remains in this state for any
length of time, contact the gas supply
company.
1.3 Maintenance
The user is obliged to have routine
maintenance done on the boiler and the
burner once a year.
Correct maintenance of the boiler allows
it to work under the best conditions,
protects the environment, and makes the
equipment fully safe for people, animals,
or property.
The boiler must be maintained only by
qualified personnel.
The user may only clean the casing on
the boiler, and this must be done using
products for cleaning furniture.
Do not use water!
1.4 Notes for the user
The user is not authorised to remove
the casing of the boiler and to work on
parts inside.
NOBODY, INCLUDING QUALIFIED
PERSONNEL, IS AUTHORISED TO
MODIFY THE BOILER.
Qualified personnel may install specific
original kits on the boiler.
The Manufacturer accepts no
responsibility for damage to people,
animals, or property that may arise due to
tampering or incorrect work done on the
boiler.
The heating system can be effectively
protected against freezing by using
specific anti-freeze products that are
suitable for multi-metal systems.
Do not use anti-freeze products for car
engines, and check the effectiveness
of the product over the time.
This boiler is fitted with a thermometer to
allow you to check the water temperature.
fig. 2
7

2.1 Technical characteristics
These boilers are fitted with a high
performance heat exchanger that works
with gas burners at atmospheric pressure.
The following models are available:
RTN E 18 and RTN 18 with a heat output
of 18 kW.
RTN E 24 and RTN 24 with a heat output
of 24 kW.
RTN E 32 and RTN 32 with a heat output
of 31,5 kW.
RTN E 36 and RTN 36 with a heat output
of 36 kW.
RTN E 48 and RTN 48 with a heat output
of 48 kW.
RTN E 60 with a heat output of 60 kW.
RTN E 70 with a heat output of 70 kW.
RTN E 80 with a heat output of 80 kW.
RTN E 90 with a heat output of 90 kW.
RTN E 100 with a heat output of 100 kW
RTN 18 to RTN 36 and RTN E 18 to RTN E
36 models can be supplied in a PV version,
which means that they have a circulation
pump and an 8 lit. expansion vessel.
RTN E boilers are equipped with an
electronic card for checking the flame and
have an electronic ignition (which is
indicated by the addition of the letter Ein
the model name).
The models from RTN 18 to RTN 48 are
fitted with a thermoelectric valve and a
piezoelectric ignition unit.
These boilers meet the essential
requirements laid down in EEC Directives
for this product and
- Gas Directive 90/396/EEC dated 29th
June 1990,
- Performance Directive 92/42/EEC dated
21st May 1992.
- EMC Directive 89/336/EEC dated 3rd
May 1989, as amended by Directive 92/31/
EEC dated 28th April 1992,
- European Community Low Voltage
Directive 73/23/EEC dated 19th February
1973, as amended by Directive 93/68/EEC
dated 22nd July 1993
and they are fitted with all the safety
devices called for in the current standards
for this type of product.
The main technical characteristics of the
boilers are listed below:
• High-performance cast-iron heat
exchanger.
• Insulation in glass wool with thick
aluminized paper (50 mm).
• Casing in electrically galvanised steel
plating, epoxy-polyester powder coated.
• Lit main switch.
• LED indications for: power on, heating
pump operation, burner operation,
overheating cut-out, cut-out due to lack
of draught in the flue or low gas pressure
(low gas pressure only RTN 70 to RTN 100
models) and burner cut-out (only “E”
models).
• Heating temperature selector (45/85°C).
• Safety limit thermostat (110°C).
• Flue gas safety thermostat.
• Minimum gas supply pressure switch
(models RTN 70 to RTN 100).
• Thermometer or thermometer/pressure
gauge (for models RTN 60 to RTN 100 and
all PV models).
• System drain cock.
• Electrical system with printed electric
circuit.
• Provision for the electrical connection of
a heating pump.
• Can take a safety pressure switch to
guard against insufficient water.
• Provision for the connection of a card for
managing a remote water cylinder
(optional kit).
• Provision for the connection of a climatic
unit (optional kit).
• Provision for the connection of a card for
managing three heating areas (optional
kit).
• 8-lit. expansion vessel (for PV models).
• Single-speed circulation unit (for PV
models).
2. TECHNICAL CHARACTERISTICS AND DIMENSIONS
8

2.2 Dimensions
NOTA: In PV models, equipped with circulation pump and expansion vessel, R and M connections are Ø G3/4
fig. 3
fig. 4
MODEL L (mm) Flow M Return R Gas G Flue gas duct D
(mm)
RTN / RTN E 18 525 G1” 1/2 G1” 1/2 G 3/4” 110
RTN / RTN E 24 525 G1” 1/2 G1” 1/2 G 3/4” 130
RTN / RTN E 32 - RTN / RTN E 36 625 G1” 1/2 G1” 1/2 G 3/4” 130
RTN / RTN E 48 765 G1” 1/2 G1” 1/2 G 3/4” 150
MODEL L (mm) Flow M Return R Gas G Flue gas duct D
(mm)
RTN E 60 905 G1” 1/2 G1” 1/2 G1” 180
RTN E 70 1052 G1” 1/2 G1” 1/2 G1” 180
RTN E 80 1153 G1” 1/2 G1” 1/2 G1” 200
RTN E 90 1280 G1” 1/2 G1” 1/2 G1” 220
RTN E 100 1430 G1” 1/2 G1” 1/2 G1” 250
9

2.3 Technical Data
MODELS
RTN / RTN E
18
RTN / RTN E
24
RTN / RTN E
32
RTN / RTN E
36
RTN / RTN E
48
EC Efficiency class ★★ ★★ ★★ ★★ ★★
EC PIN 49BN3789
Category II2H3+
Type B11BS
Heat output kW 18.0 24.0 31.5 36.0 48.0
Heat input kW 20.0 26.6 34.4 39.2 52.8
Performance at nominal load % 89.6 90.9 90.9 90.83 91.84
Performance at reduced load (30%) % 89.2 91.1 89.0 90.75 90.4
Maintenance losses ΔT=50°C % 3.6 2.8 3.1 1.57 1.76
Flue losses with burner off % 0.2
Flue losses with burner on % 6.8 6.3 6.0 7.6 6.4
N° of elements of the heat exchanger -33445
Net weight Kg 105 105 138 138 173
Water content l 10.0 10.0 13.4 13.4 16.8
Minimum water flow l/h 400 520 680 770 1030
Flue gas duct diameter mm 110 130 130 130 150
Maximum operating pressure bar 4
Working temperature °C 45 - 85
Electrical power supply V-Hz 230/50
Electrical power W 10
Fuse on power supply A 4
Natural gas G20
CO2 value % 5.8 5.5 6.4 6.5 7.0
Flue gas temperature °C 110/120 110/120 120/130 120/130 120/130
Flue gas mass flow Kg/h 42 56 63 70 88
Number of main burner nozzles - 3
Diameter of main burner nozzles mm 2.2 2.5 3.0 3.0 3.1
Diameter of pilot nozzle mm 2 x 0.27
Gas pressure at burner mbar 9.5 11.0 9.5 12.0 12.5
Burner supply pressure mbar 20
Gas flow rate (15°C / 1013 mbar) Stm3/h 2.11 2.81 3.64 4.15 5.58
Gas G30
CO2 value % 6.3 6.9 8.2 8.7 8.7
Flue gas temperature °C 110/120 110/120 120/130 120/130 120/130
Flue gas mass flow Kg/h 40 53 60 64 80
Number of main burner nozzles - 3
Diameter of main burner nozzles mm 1.25 1.50 1.70 1.80 2.05
Diameter of pilot nozzle mm 1 x 0.22
Gas pressure at burner mbar 29
Burner supply pressure mbar 26 26 25.5 26.0 26.0
Gas flow rate (15°C / 1013 mbar) Kg/h 1.6 2.1 2.7 3.1 4.2
10

MODÈLES
RTN E 60 RTN E 70 RTN E 80 RTN E 90 RTN E 100
EC Efficiency class ★★ ★★ ★★ ★★ ★★
EC PIN 49BN3790
Category II2H3+
Type B11BS
Heat output kW 60 70 80 90 100
Heat input kW 66 76.3 87.3 98.2 109.7
Performance at nominal load % 91.7 91.7 91.7 91.6 91.6
Performance at reduced load (30%) % 90.6 90.4 90.3 90.3 90.2
Maintenance losses ΔT=50°C % 1.8 1.7 1.6 1.5 1.2
Flue losses with burner off % 0.2
Flue losses with burner on % 6.5 6.6 6.7 7.0 7.2
N° of elements of the heat exchanger - 6 7 8 9 10
Net weight Kg 215 250 285 320 355
Water content l 20.2 23.5 26.8 30.1 33.4
Minimum water flow l/h 1200 1500 1700 1900 2100
Flue gas duct diameter mm 180 180 200 220 250
Maximum operating pressure bar 4
Working temperature °C 45 - 85
Electrical power supply V-Hz 230/50
Electrical power W 20
Fuse on power supply A 4
Natural gas G20
CO2 value % 6.5 6.3 6.8 5.5 5.5
Flue gas temperature °C 110/120 110/120 120/130 110/120 110/120
Flue gas mass flow Kg/h 114 136 144 200 223
Number of main burner nozzles - 3
Diameter of main burner nozzles mm 3.9 4.1 4.5 4.9 5.2
Diameter of pilot nozzle mm 2 x 0.27
Gas pressure at burner mbar 11.55 13.4 12.0 11.0 11.6
Burner supply pressure mbar 20
Gas flow rate (15°C / 1013 mbar) Stm3/h 6.97 8.13 9.23 10.44 11.60
Gas G30
CO2 value % 6.5 6.5 7.3 5.7 5.7
Flue gas temperature °C 110/120 110/120 120/130 110/120 110/120
Flue gas mass flow Kg/h 134 154 158 225 252
Number of main burner nozzles - 3
Diameter of main burner nozzles mm 2.4 2.6 2.75 2.9 3.05
Diameter of pilot nozzle mm 1 x 0.22
Gas pressure at burner mbar 29
Burner supply pressure mbar 26 26 25.5 26.8 26
Gas flow rate (15°C / 1013 mbar) Kg/h 5.2 6.1 6.9 7.8 8.7
11

3.1 Installation standards
Thisboilermustbe installed in compliance
with current laws and standards, which
are taken as being an integral part of this
booklet.
3.2 Installation
3.2.1 Packaging
The boilers are supplied packed in a
strong cardboard box on a wooden
pallet. On removing the cardboard box,
make sure that the boiler is complete.
The packing materials can be recycled.
Dispose of them via specific waste
collection sites.
Keep the packing out of the reach of
children, as, by its very nature, it may
constitute a source of danger.
The Manufacturer accepts no
responsibility for damage to people,
animals, or property due to failure to
observe the instruction above.
The pack contains a packet in which you
will find the installation, operation, and
maintenance manual.
3.2.2 Choosing where to install the
boiler
The following must be taken into account
when choosing where to install the
boiler:
• It is advisable to leave at least 50 cm on
each side of the boiler to facilitate future
maintenance.
• Do not install in damp or dusty rooms.
• The boiler room must not be accessible
to outsiders, children, or animals.
3.2.3 Installing the boiler
Before connecting the boiler to the
piping for the hot water and heating
systems, clean the piping carefully to
eliminate any metal residue left during
working and welding, and any oil or
grease that may be left and that could
damage the boiler or alter its operation if
it reaches the boiler.
NB: Do not use solvents, as these could
damage the components.
The Manufacturer accepts no
responsibility for damage to people,
animals, or property due to failure to
observe the instructions above.
To install the boiler proceed as follows:
• Remove the galvanised plate on the
lower back part of the boiler.
• Unscrew the four screws which block
the brackets fixing the boiler to the
timber pallet (Fig. 5)
• Remove the boiler from the pallet
without damaging it.
• Put spacers between the floor and the
boiler’s feet if necessary, to make the
installation stable.
• Connect the boiler to the system’s
delivery and return pipes.
• Remember that the plumbing system
must include all the safety and control
elements required in terms of current
standards (safety valve, water pressure
switch, heat discharge valve, pressure
gauge, etc.).
• Couple the boiler to the flue.
• Connect to the electrical system of the
boiler: the ambient thermostat, the
heating pump, and the heating water
pressure switch.
• Connect to the electrical mains.
3.2.4 Ventilation of boiler room
The boilers have open combustion
chambers and are designed for being
connected to a flue gas chimney.
The combustion-supporting air is drawn
directly from the room in which the boiler
is installed.
It is obligatory that the boiler be installed
in an adequate room in terms of the
current standard, which is taken as an
integral part of this booklet.
3.2.5 Flue gas discharge system
The BALI boilers are fitted with a flue gas
discharge coupling that is suitable for
connecting to a flue gas chimney with a
diameter as specified in the technical
data tables.
Current standards must be complied
with when discharging flue gas into the
atmosphere, and these standards are
taken as being an integral part of this
booklet.
The flue gas ducts from the boiler are to
be connected to a flue gas discharge
system formed as indicated in current
standards, which are taken as being an
integral part of this booklet.
The following obligatory requirements
for flue gas chimney and flue gas ducts
must be kept in mind:
• They are to be of a diameter not less
than that on the boiler outlet.
• They are to be made of impermeable
material that can withstand the flue gas
temperature and related acid condensate.
• They are to have low thermal
сonductivity, sufficient mechanical
strength, be properly sealed, and of a
calculated height and cross-section.
• The vertical inclination (flue gas duct)
and section are to be constant, without
any bottlenecks.
• Where horizontal flues sections have to
be used, these must be at an incline of at
least 5%.
• The end of the flue pipe is to be such
that it can ensure efficient, constant
evacuation of flue gas under any weather
conditions.
• The end section of the flue pipe is to be
at least 0,5 m above any adjacent
structure within a 5 m radius.
3. INSTRUCTIONS FOR THE INSTALLER
fig. 5
12

3.2.6 On-site measurement of
combustion efficiency
To determine combustion efficiency the
following measurements must be taken:
• The temperature of the combustion-
supporting air.
• The temperature of the flue gas and the
percentage of CO2 in samples drawn
from the hole provided for this purpose
in the flue gas duct.
Take the specific measurements with
the boiler running at normal load.
3.2.7 Connecting to the gas mains
The gas supply pipe must have a cross-
section that is equal to or greater than
that on the burner.
Installation standards must be
complied with and are taken as being
an integral part of this booklet.
Remember that before putting an
internal gas distribution system into
service, before it is connected to the
meter, it must be checked for leaks.
If any part of the system is inaccessible
the tightness test must be carried out
before the pipes are covered up.
The tightness test must not be carried
out using combustible gas. Use air or
nitrogen for this purpose.
Once there is gas in the pipes, checking
for leaks using a naked flame is
forbidden.
Use the products made for this purpose
that are available on the market.
3.2.8 Connecting to the electrical
mains
These boilers have a terminal board for
connection to a three-pole power supply
cable, and a suitable cable clamp to
prevent it from being torn out.
This boiler must be connected to a
230V-50Hz electrical power supply.
When forming the connection respect
the phase/neutral polarity.
During installation relevant standards
must be complied with and are taken
as being an integral part of this
booklet.
A two-pole switch must be fitted
upstream of the boiler to allow all
maintenance work to be carried out in
complete safety.
The power supply to the boiler must be
fitted with a differential magneticthermal
trip-switch of a suitable tripping power.
The electrical power supply must be
safely earthed.
This basic safety requirement must be
checked. In case of doubt, call in
professionally qualified personnel to
check the electrical system carefully.
The Manufacturer accepts no
responsibility whatsoever for any
damage caused due to failure to earth
the system. Gas, water or heating
system pipes are not suitable for
earthing the systemю
3.2.9 Plumbing connections
Before installation, the boiler should be
cleaned in order to remove, as far as
possible, the impurities that may come
from the components as far as possible,
as these could damage the circulation
pump or the heat exchanger.
The heating delivery and return pipes
must be connected to the respective
couplings on the boiler.
When sizing the piping for the heating
system, bear in mind the load losses
caused by radiators, thermostatic valves,
radiatorgate valves,andthe configuration
of the system itself.
3.2.10 Installation of original kits
The Manufacturer provides original kits
for installing clock programmers, cards
for managing a remote water storage
cylinder,andforinstallingaheatregulating
unit.
These original kits are to be installed
in compliance with the instructions
supplied with them.
3.3 Filling the system
Once all the connections in the system
have been completed, the heating circuit
can be filled.
This operation must be carried out
carefully, and in the following steps:
• Open the bleeding valves on the
radiators and make sure that the vent
valve installed in the boiler room is
working.
• Gradually open the relevant stopcock to
fill the system and make sure that all
automatic air vents installed in the system
are working properly.
• Close the vent valve as soon as water
comes out of it.
• Use the pressure gauge installed in the
boiler room to check when the pressure
reaches 0.8 / 1 bar.
• Shut the filling stopcock and bleed any
air out again using the bleeding valves
on the radiators.
• Having started the boiler and brought
the system up to its working temperature,
stop the pump and repeat the air
bleeding operations.
• Allow the system to cool and return the
water pressure to 0.8/1 bar.
WARNING
It is essential to treat the water of
domestic heating systems using specific
products that are compatible with
multimetal systems. This must be made
to optimise performance and safety, to
preserve these conditions over time, to
ensure longlasting regular operation of
auxiliary equipment as well, and to
minimise energy consumption, thereby
integrating current laws and standard.
Note: The boiler is equipped with a
drain cock at the front of the unit that
can be used to empty the system
13

3.4 Starting the boiler
3.4.1 Preliminary checks
Before starting the boiler it is advisable to check that:
• The flue gas duct has been installed in compliance with
instructions. When the boiler is running no products
generated by combustion are to leak from any of the
gaskets.
• The boiler power supply is 230 V – 50 Hz.
• The system is properly filled with water (pressure on the water
gauge 0.8 / 1 bar).
• All stopcocks in the system’s piping are open.
• The fuel supply stopcock is open.
• There are no gas leaks.
• The external main switch is on.
• The boiler’s safety valve is not blocked.
• There are no water leaks.
To speed up and facilitate igniting the boiler for the first time,
bleed the air out of the gas piping using the gas pressure valve
socket.
Close the pressure socket carefully after bleeding the system.
3.4.2 Starting up and switching off
For starting up and switching off the boiler, follow the “User’s
Instructions”.
3.5 Wiring diagrams
BC: Flame control
EA: Ignition electrode
ER: Flame detection electrode
F1: Protection fuse F4A 250V
IG: Main switch [marked “on/off” on the printed circuit]
L1: Flue gas thermostat / gas pressure gauge indication
L3: CH pump indication
L4: Burner ON indication
L5: Safety thermostat indication
L6: Burner cut-out indication (only E models).
Lon:Power ON indication
Mn: Minimum thermostat (optional) [marked “Tm” on
the printed circuit]
MT: Motor timer (optional) [marked TIMER on the printed
circuit]
PA: Water pressure switch (optional) [marked with the
pressure switch symbol on the printed circuit]
PC: CH pump
Pgas: Gas pressure switch
PZ: Ignition piezoelectric unit
P1: Burner reset button
R: Heating thermostat [marked “Tr” on the printed circuit]
TA: Ambient thermostat
TS: Safety thermostat
TF: Flue gas thermostat
TM: Contact timer (optional) [marked TIMER on the
printed circuit]
VG, VG1,VG2: Gas Valve
a = Light blue
br = Brown
g = Grey
p = Pink
v = Violet
bl = Dark blue
bk = Black
gn = Green
r = Red
y = Yellow
w = White
ygn = Yellow/Green
o = Orange
The plant pump must be connected directly to the boiler terminal board (terminals 11 and 12).
14

3.5.1 General layout
mod. 18 - 48 RTN E
fig. 7
mod. 18 - 48 RTN
fig. 6
15

mod. 70 - 100 RTN E
fig. 9
mod. 60 RTN E
fig. 8
16

mod. 18 - 48 RTN E
3.5.2 Topographical diagrams
fig. 7A
mod. 18 - 48 RTN
fig. 6A
17

mod. 60 RTN E
fig. 8A
mod. 70 - 100 RTN E
fig. 9A
18

3.6 Gas conversions
Changing a boiler over from natural gas
to LPG and vice versa is only to be carried
out by qualified personnel.
To check the setting values for the
nozzles and gas supply pressure, use a
pressure gauge connected to the
pressure sockets on the valves.
3.6.1 Conversion from natural gas to
LPG
Proceed as follows:
• Remove the natural gas nozzle from the
pilot burner after having unscrewed the
nut that holds the olive and vent the gas
supply pipe to the pilot burner.
• Position the LPG nozzle checking that it
is as indicated in the technical data table,
and after repositioning the gas supply
pipe tighten the nut that secures the
olive.
• Remove the natural gas nozzle on the
main burner and fit the LPG nozzle,
checking that this is as indicated in the
technical data table.
• Unscrew the pressure regulating cap on
the gas valve and tighten the pressure
regulating screw all the way.
• Screw the pressure regulating cap back
on and seal it (using paint or a self-
adhesive label, for example).
NOTE: for models RTN E 60 to RTN E
100 the regulating operations must be
carried out on both gas valves.
• Check the gas circuit for leaks, especially
the points that were disconnected.
• Affix the self-adhesive label provided
that indicates the type of gas and
pressure for which the equipment is set.
3.6.2 Conversion from LPG to natural
gas
Proceed as follows:
• Remove the LPG nozzle from the pilot
burner after having unscrewed the nut
that holds the olive and vent the gas
supply pipe to the pilot burner.
• Position the natural gas nozzle checking
that it is as indicated in the technical data
table, and after repositioning the gas
supply pipe tighten the nut that secures
the olive.
• Remove the LPG nozzle on the main
burner and fit the natural gas nozzle,
checking that this is as indicated in the
technical data table.
• Unscrew the pressure regulating cap on
the gas valve and unscrew the pressure
regulating screws so that the pressure at
the outlet is as specified in the technical
data table.
• Screw the pressure regulating cap back
on and seal it (using paint or a self-
adhesive label, for example).
NOTE: for models RTN E 60 to RTN E
100 the regulating operations must be
carried out on both gas valves, taking
care to balance them correctly.
• Check the gas circuit for leaks, especially
the points that were disconnected.
• Affix the self-adhesive label provided
that indicates the type of gas and
pressure for which the equipment is set.
19
4. MAINTENANCE
In order to ensure that the equipment is
efficient and that it functions correctly,
maintenance must be carried out
annually, based on the programme laid
out below:
It is obligatory for all maintenance
(and repair) operations to be carried
out by qualified personnel.
Before starting any maintenance work
that involves replacing components
and/or cleaning the inside of the boiler,
disconnect the equipment from the
electrical power supply.
Maintenance programme
Routine maintenance must include the
following checks:
- Check of the general integrity of the
boiler.
- Checking the gas supply to the boiler for
leaks.
- Checking ignition of the boiler.
- Checking the boiler’s combustion
parameters by analysing the flue gas (this
check is done every two years if the boiler
is installed on its own.
Where the boiler is installed in a cascading
system, this check is run annually).
- Checking the integrity, good state of
preservation, and tightness test on the
flue gas discharge system.
- Checking the integrity of safety devices
on the boiler in general.
- Checking for water leaks and rusting on
the boiler’s couplings.
- Checking the efficiency of the system’s
safety valve.
The following cleaning is to be done
(with the boiler cold):
- General internal cleaning of the boiler.
- Cleaning of the burner and resetting of
the same if necessary, as per instructions
provided by the manufacturer.
- Cleaning of the ventilation grille for the
boiler room.
- Cleaning of the flue gas side of the heat
exchanger. This can be done using swabs
and vacuum cleaners to remove soot
deposits on the sides and fins used for
exchanging heat.
Alternatively specific chemical products
can be used in compliance with the
instructions for use of the same.
Do not use inflammable products such
as petrol, solvents or any other such
material to clean the heat exchanger.
When working on the boiler for the
first time, check:
- The suitability of the boiler room.
- The ventilation openings in the room.
- The flue gas discharge ducts, and the
diameters and lengths of these.
- That the boiler has been correctly
installed as per instructions contained
in this booklet.
If the equipment is not able to work
correctly, or where it poses any danger
to people, animals or property, inform
the person responsible for the plant
and draw up a statement in this regard

Fondital S.p.A.
25079 VOBARNO (Brescia) Italy - Via Cerreto, 40
Tel. [phone] - Fax [phone]
e mail: [e-mail] - www.fondital.com
The producer reserves the right to modify the data contained herein at any time without prior notice.
Uff. Pubblicità Fondital IST 03 C 358 - 01 Ottobre 2009 (10/2009)
0LIBISEN58