Fondital PANAREA COMPACT User manual

IST 03 C 746 - 01
INSTALLATION
USE AND MAINTENANCE
MANUAL
PANAREA
COMPACT
EN

2
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.
WARNING
• We inform users that:
• Boilers shall be installed by an authorised company under the requirements set forth by the prevailing rules, in full compliance with
the prevailing regulations and standards.
• Anyone entrusting installation to an unqualified installer will be subject to administrative sanctions.
Boilers must be maintained by qualified personnel only, under the requirements set forth by the prevailing rules.
WARNING
• In existing buildings, this natural draught boiler must be connected only to flue pipes shared by several houses to vent the
combustion residues outside the premises inside which boiler is installed.
• Boiler takes the air necessary to combustion directly from the installation premises and features a wind-proof flue.
• Due to a lower efficiency, any other use of this boiler must be avoided as it would result in a higher energy consumption and higher
operating costs.
We hereby inform you that certain models, versions and/or accessories relevant to the products this manual refers to, might not be
available in some countries.
Therefore, it is recommended to contact the manufacturer or the importer in order to get the necessary information about the actual
availability of such models, versions and/or accessories.
The manufacturer reserves the right to modify the products and/or its components as deemed necessary, in any moment and without
prior notice.
This instruction manual is available in two languages, Italian and English, without prejudice to the prevalence of Italian language in
case of differences in translation and/or dispute on construction of the text.

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General information for fitters, maintenance technicians and users
This INSTRUCTION MANUAL, which is an integral and indispensable part of the product, must be handed over to the user by the installer and
must be kept in a safe place for future reference. The manual must accompany the boiler should it be sold or its possession transferred. Fol-
lowing the boiler installation, the fitter is to advise the user about boiler operation and its safety devices
This boiler must be used for the purposes for which it has been intended. Any other use shall be considered incorrect and therefore
dangerous.
The boiler must be installed by qualified personnel, in compliance with applicable laws and standards and according to the manufacturer’s
instructions given in this manual. Incorrect installation may cause injury to persons and/or animals and damage to property. The manufacturer
shall not be held liable for any such injury and/or damage.
Damage and/or injury caused by incorrect installation or use and/or damage and/or injury due to non-observance of the manufacturer’s in-
structions shall relieve the manufacturer from any and all contractual and extra-contractual liability.
Before installing the boiler, check that the technical data correspond to the requirements for its correct use in the system.
Check that the boiler is intact and it has not been damaged during transport and handling. Do not install equipment which is damaged and/or
faulty.
Do not obstruct the air suction and/or heat dissipation openings.
Only manufacturer approved and supplied accessories or optional kits (including electric ones) are to be installed.
Properly dispose of the packaging as all the materials can be recycled. The packaging must therefore be sent to specific waste management
sites.
Keep the packaging out of the reach of children as it may represent a choking and suffocation hazard.
In the event of failure and/or faulty functioning, switch off the boiler. Do not attempt to make repairs: contact qualified technicians.
Manufacturer approved and supplied parts must be used for all repairs to the boiler.
Non-observance of the above requirements may affect the safety of the boilers and endanger people, animals and property.
The manufacturer, in order to guarantee efficient and correct functioning of the equipment, recommends the boiler to be serviced
and repaired by an authorized Service Centre.
Routine boiler maintenance is to be performed according to the schedule indicated in the relevant section of this manual.
Appropriate boiler maintenance ensures efficient operation, environment preservation, and safety for people, animals and objects.
In the event of long periods of inactivity of the boiler, disconnect it from the power mains and close the gas tap.
Warning! Should power mains be disconnected, boiler electronic anti-freeze function will not be operative.
Should there be a risk of freezing, add antifreeze: it is not advisable to empty the system as this may result in damage; use specific anti-freeze
products suitable for multi-metal heating systems.
IMPORTANT
If you smell gas:
- do not turn on or off electric switches and do not turn on electric appliances;
- do not ignite flames and do not smoke;
- close the main gas tap;
- open doors and windows;
- contact a Service Centre, a qualified installer or the gas supply company.
Never use flames to detect gas leaks.
The boiler is designed for installation in the country indicated on the technical data plate: installation in any other
country may be a source of danger for people, animals and property.

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CONTENTS
General information for the Installer, Maintenance Technician and User ............................................................................................................................ Page 3
1. Instructions for the User ................................................................................................................................................................... Page 6
1.1 Control panel ............................................................................................................................................................................................................................. Page 6
1.2 Operating the boiler ............................................................................................................................................................................................................... Page 7
1.2.1 Switching on ................................................................................................................................................................................................................ Page 7
1.2.2 Operation ...................................................................................................................................................................................................................... Page 7
1.3 Boiler shut-down ...................................................................................................................................................................................................................... Page 8
1.3.1 Burner shut-down ...................................................................................................................................................................................................... Page 8
1.3.2 Shut-down due to overheating ............................................................................................................................................................................ Page 8
1.3.3 Shut-down due to low water pressure ............................................................................................................................................................... Page 8
1.3.4 Shut-down due to incorrect air/flue gas system draught ............................................................................................................................ Page 8
1.3.5 Shut-down due to malfunction of temperature probes............................................................................................................................... Page 8
1.4 Maintenance ............................................................................................................................................................................................................................. Page 9
1.5 Notes for the User ..................................................................................................................................................................................................................... Page 9
2. Technical characteristics and dimensions .......................................................................................................................................Page 10
2.1 Technical characteristics ......................................................................................................................................................................................................... Page 10
2.2 Dimensions ................................................................................................................................................................................................................................. Page 11
2.3 Hydraulic layout ......................................................................................................................................................................................................................... Page 12
2.4 Operating data .......................................................................................................................................................................................................................... Page 13
2.5 General characteristics............................................................................................................................................................................................................. Page 13
2.6 ERP and Labelling data ........................................................................................................................................................................................................... Page 14
3. Instructions for the Installer ............................................................................................................................................................Page 15
3.1 Installation standards .............................................................................................................................................................................................................. Page 15
3.2 Installation ................................................................................................................................................................................................................................... Page 15
3.2.1 Packaging ...................................................................................................................................................................................................................... Page 15
3.2.2 Choosing where to install the boiler ...................................................................................................................................................................... Page 15
3.2.3 Positioning the boiler ................................................................................................................................................................................................... Page 16
3.2.4 Installing the boiler ....................................................................................................................................................................................................... Page 17
3.2.5 Air intake and flue gas discharge system .............................................................................................................................................................. Page 17
3.2.6 Checking combustion efficiency .......................................................................................................................................................................... Page 19
3.2.7 Gas mains connection............................................................................................................................................................................................... Page 19
3.2.8 Plumbing connections.............................................................................................................................................................................................. Page 20
3.2.9 Power mains connection ............................................................................................................................................................................................. Page 20
3.2.10 Room thermostat connection (optional equipment) ..................................................................................................................................... Page 20
3.3 Loading the system ................................................................................................................................................................................................................. Page 21
3.4. Available head .......................................................................................................................................................................................................................... pag. 21
3.5 Starting the boiler .................................................................................................................................................................................................................... Page 22
3.5.1 Preliminary checks ..................................................................................................................................................................................................... Page 22
3.5.2 Switching on and switching off ............................................................................................................................................................................ Page 22
3.6 Wiring diagram ........................................................................................................................................................................................................................... Page 23
3.7 Adaptation to other gas types and burner adjustment ............................................................................................................................................. Page 24
4. Testing the boiler .............................................................................................................................................................................. Page 26
4.1 Preliminary checks ................................................................................................................................................................................................................... Page 26
4.2 Switching on and switching off ........................................................................................................................................................................................... Page 26
5. Maintenance ......................................................................................................................................................................................Page 27
5.1 Maintenance schedule ............................................................................................................................................................................................................ Page 27
5.2 Combustion analysis ............................................................................................................................................................................................................... Page 27
5.3 Decommissioning, disassembly and disposal ................................................................................................................................................................ Page 27
6. Troubleshooting ............................................................................................................................................................................... Page 28
7. Manufacturer’s compliance statement ...........................................................................................................................................Page 30

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PICTURE INDEX
Pic. 1 – Control panel...................................................................................................................................................................................................................................Page 6
Pic. 2 – Loading tap...................................................................................................................................................................................................................................... Page 8
Pic. 3 – Dimensions......................................................................................................................................................................................................................................Page 11
Pic. 4 – Hydraulic layout............................................................................................................................................................................................................................. Page 12
Pic. 5 – Installation template ....................................................................................................................................................................................................................Page 16
Pic. 6 – Connection to chimney system................................................................................................................................................................................................Page 18
Pic. 7 – Dimensions for connection to the flue gas discharge duct ...........................................................................................................................................Page 18
Pic. 8 – Gas mains connection .................................................................................................................................................................................................................Page 19
Pic. 9 – Available head ................................................................................................................................................................................................................................Page 21
Pic. 10 – Wiring diagram ............................................................................................................................................................................................................................Page 23
Pic. 11 – Natural gas – Lpg selection jumper......................................................................................................................................................................................Page 24
Pic. 12 – Gas valve adjustment SIEMENS VGU56...............................................................................................................................................................................Page 25
Pic. 13 – Gas valve adjustment SIT 845.................................................................................................................................................................................................Page 25
Pic. 14 – Gas valve adjustment SIEMENS VGUS56 ............................................................................................................................................................................Page 25
CHART INDEX
No. 1 chart – Led signaling – boiler operation status...................................................................................................................................................................... Page 6
No. 2 chart – Adjustment rates................................................................................................................................................................................................................Page 13
No. 3 chart – General specifications ...................................................................................................................................................................................................... Page 13
No. 4 chart – Combustion data CTN 24 model .................................................................................................................................................................................Page 13
No. 5 chart – ERP and Labelling data ....................................................................................................................................................................................................Page 14
No. 6 chart – “Temperature – nominal resistance”chart of temperature probes.................................................................................................................. Page 24

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1. Boiler working mode led (multi-color)
See no. 1 chart at the bottom of the page for further details on color
displayed by led in relation to boiler working mode.
2. Boiler working mode led (multi-color)
See no. 1 chart at the bottom of the page for further details on color
displayed by led in relation to boiler working mode.
3. Water pressure gauge
The gauge shows water pressure in the CH system.
4. CH selector and adjusting knob
The knob activates or de-activates CH operation, and adjusts CH water
temperature between a minimum of 35°C and a maximum of 78°C.
When the knob is set to (fully turned counter-clockwise), the boiler
is set to summer mode and CH operation is de-activated.
4. DHW selector and boiler shutdown reset
The knob sets the boiler to stand-by ( position, fully turned counter-
clockwise), and adjust DHW temperature between a minimum of 35°C
and a maximum of 58°C.
When the boiler has shut down is to be reset by turning the knob to
position.
WARNING
The boiler has a special built-in regulator limiting DHW flow up to 10
liter per minute. In addition to the setting of no. 5 selector,
the temperature of the DHW supplied also depends on the flow reque-
sted by the user and the temperature of the water mains supply.
1. INSTRUCTIONS FOR THE USER
1.1 Control panel
Pic. 1 – Control panel
1
2
3 5
4
No. 1 chart – Color displayed by led in relation to boiler operation status
LED 1 LED 2
Power connected to boiler n/a GREEN
Flame presence n/a YELLOW
Active CH mode GREEN n/a
Shutdown due to flame absence OFF RED
Flue gas thermostat shutdown YELLOW OFF
Safety thermostat shutdown RED OFF
Gas valve alarm FLASHING GREEN OFF
Water pressure switch alarm FLASHING YELLOW OFF
Flow water temperature alarm (>85°) FLASHING RED n/a
CH flow probe alarm FLASHING YELLOW/RED OFF
DHW probe alarm FLASHING GREEN/RED OFF
KEY CHART TO ACHRONYMS
OFF LED off
RED LED on, displaying the color stated in the chart
FLASHING RED LED flashing, displaying the color stated in the chart
RED/GREEN LED flashing, displaying in sequence the colors stated in the chart
n/a LED status is not relevant

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The following procedures are to be implemented only after the boiler is installed, tested and its installation is certified
by a qualified fitter.
• Open the gas stop cock.
• connect power mains to the boiler (no. 2 LED turns on displaying the green color);
• choose boiler mode by means of no. 4 selector (pic. 1);
• set the desired central heating water temperature by means of no. 4 adjusting knob (pic. 1);
• set the desired domestic hot water temperature by means of no. 5 adjusting knob (pic. 1);
• set room temperature by means of room thermostat (when available).
When CH is required, no. 1 LED turns on ( green ).
When flame is present no. 2 LED turns on ( yellow ).
Should the boiler be left inactive for a long time, particularly if boiler is lpg powered, ignition might be difficult.
Before starting the boiler switch on another gas powered device (e.g. kitchen range).
Beware that even by following that procedure, the boiler might still shut down once or twice.
Reset the boiler by turning no. 5 knob to reset position for a few seconds.
1.2.2. Operation
To prevent frequent ignition and switching off in the heating mode, the boiler has a waiting time of 4 minutes between subsequent ignitions.
Should water temperature in the system fall below 40°C, the waiting time is disallowed and the boiler re-ignites.
Boiler electronics always gives priority to DHW over CH supply.
Temperature can be adjusted within a 35°C to 58°C range.
The boiler is fitted with a flow-limiting device that allows a maximum DHW flow of 10 liter per minute.
Available DHW liters per minute depend on boiler thermal output and water mains supply temperature, according to the following formula:
l = 318/Δt
where Δt = DHW temperature – water mains supply temperature
E.g. when water mains supply temperature is 8°C and DHW is required at 38°C, the value of Δt is:
Δt = 38 °C – 8 °C = 30 °C
and DHW liters per minute) obtainable at the required temperature of 38°C are:
l = 318/30 = 10.6 [liters per minute] (mixed water to the tap).
The boiler is equipped with an anti-frost protection system which is not active when the boiler is in stand-by mode.
When central heating water temperature sensor detects a water temperature of 5°C, the boiler switches on and stays on at its minimum heating
output until the temperature of central heating water reaches 30°C or 15 minutes have elapsed.
Should the boiler shut down, pump operation is in any case granted.
The anti-freeze function only protects the boiler and not the central heating system.
The central heating system must be protected by using an ambient thermostat, although it is disabled when
the selector is set to stand-by.
The heating system can be effectively protected against icing 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 used over time.
Where the boiler is left inactive and still connected to power the pump is activated for 30 seconds every 24 hours to prevent seizure.
1.2 Operating the boiler
1.2.1 Switching on

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Loading tap
Pic. 2 - Loading tap
1.3. Boiler shut-down
When any malfunction occurs, the boiler automatically shuts down.
Refer to no. 1 chart (on page 6) in order to detect the boiler operation status.
In order to identify plausible malfunction origin, see no. 6 paragraph“Troubleshooting” at the end of the manual.
In relation to the type of malfunction, proceed as described hereafter.
1.3.1. Burner shut-down
When the burner shuts down, no. 2 LED turns on (red). Should this happen proceed as follows:
- Check the gas stopcock to be open, and gas mains have gas in them e.g. by lighting a kitchen range burner;
- Once gas presence is verified, reset the burner by turning no. 5 selector (pic. 1) to its reset position : if the equipment does not restart and
shuts down again, after performing two attempts, contact an authorized Service Centre or qualified personnel for service. Should the burner
shut down frequently, signaling a recurrent operation malfunction contact an authorized Service Centre or qualified personnel for service.
1.3.2. Shut-down due to overheating
When central heating flow overheats, no. 1 LED (pic. 1) flashes (red). Should that happen, contact an authorized Service Centre or qualified
personnel to carry out maintenance work.
1.3.3. Shut-down due to low water pressure
In case of shutdown due to water pressure switch intervention, no. 1 LED flashes (yellow).
Fill up the boiler by opening the loading tap A (pic. 2), located in the lower area of the boiler, next to the hydraulic connections.
Water pressure must be 1-1.3 bars while the boiler is cold.
In order to restore water pressure, proceed as follows:
- Turn the filling tap counter-clockwise to let water into the boiler and keep it open until no. 3 pressure gauge (pic. 1) shows that a pressure of
1-1,3 bars is reached; now close the tap by rotating it clockwise.
Should boiler shuts down frequently occur it means there is boiler malfunction in progress. Contact qualified personnel or an authorized Service
Centre for maintenance.
Once the system is filled, close the tap properly. If the tap is not properly closed, as pressure increases,
boiler safety valve may open and water flow out.
1.3.4 Shut-down due to flue system incorrect draught
Should the boiler shut down due to an anomaly in the air intake and/or flue gas discharge system, no. 1 LED (pic. 1) turns on ( yellow ). Should
that occur, contact an authorized Service Centre or qualified personnel for maintenance.
1.3.5 Shut-down due to malfunction of temperature probes
Should the burner shut down due to a malfunction of the temperature probes, no. 1 LED (pic. 1) flashes as follows:
- yellow/red for CH probe;
- red/green for DHW probe.
When that happens, contact an authorized Service Centre or qualified personnel to carry out maintenance.

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1.4. Maintenance
Have routine boiler maintenance performed according to the schedule indicated in the relevant section of this manual.
Appropriate boiler maintenance ensures efficient operation, environment preservation, and safety for people, animals and objects.
Only qualified personnel are to service the boiler.
The manufacturer recommends Customers to contact authorized Service Centers for maintenance and repairs, they are best qualified for that
procedure.
The user may only clean the external casing of the boiler, employing common household products.
Do not use water!
1.5. Notes for the User
The user may only access boiler parts which can be reached without using technical equipment and/or tools: therefore the user is not authori-
zed to remove the boiler casing and act upon inside components.
Nobody, including qualified personnel, is authorized to modify the boiler.
The manufacturer shall not be held responsible for damage to people, animals, or property due to tampering or improper intervention to the
boiler.
When the boiler remained inactive and disconnected from power mains supply for a long period of time, pump unblocking procedure may be
necessary.
The above mentioned procedure involves boiler casing removal in order to access the inside of the boiler and must therefore be implemented
by qualified personnel.
Pump blockage may be prevented by adding to the water in the CH system, specific protective, film-producing products, suitable for multi-
metal CH systems.

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2.1. Technical characteristics
The boiler is equipped with an integrated gas atmospheric burner and the following version is available:
- CTN 24 AF: open chamber, natural draught boiler with electronic ignition and instantaneous DHW supply
Boilers are equipped with ionization flame detection device.
The boilers meet applicable requirements of laws enforced in the country of destination and shown in their data plate
Installation in a country other than specified might be source of hazard to people, animals and objects.
The principal technical characteristics of the boilers are listed below:
Construction Characteristics
- Bi-thermal, high performance, copper heat exchanger.
- CH pump with integrated air purging device.
- 6-litre expansion vessel.
- Safety pressure switch, preventing low water pressure operation.
- DHW priority flow switch.
- 10 liter/min DHW flow limiting device.
- Boiler loading and unloading taps.
- DHW and CH temperature probes.
- Safety limit thermostat.
- IPX4D electrically protected control panel.
- Integrated safety and modulation electronic board.
- Electronic ignition and ionization flame detection device.
- Flue gas thermostat.
- Twin shutter, modulating gas valve.
User Interface
- Central heating selector/adjusting knob (35°C/78°C range).
- Boiler shutdown reset/DHW adjusting knob ( 35°C/58°C range).
- System water pressure gauge.
- Light emitting indicators for:
• Power ON;
• CH supply;
• ame detection;
• burner shut-down;
• gas valve alarm;
• burner shut-down due to overheating;
• burner shut-down due to faulty chimney draught;
• insucient water pressure in the system;
• malfunction of temperature probes.
Functional characteristics
- DHW priority function.
- Electronic flame modulation in CH mode, with timed rising ramp.
- Electronic flame modulation in DHW mode.
- Boiler anti-frost function (ON: 5°C, OFF: 30°C or after 15 minutes operation).
- Timer controlled ambient thermostat (240 seconds with CH flow temperature > 40°C).
- Post-circulation function of pump in CH and anti-frost modes (30 seconds).
- Post-circulation function of pump in DHW (6 seconds in winter mode, 1 second in summer mode).
- Pump anti-blocking function (30 seconds of pump operation each 24 hours of boiler inactivity).
2. TECHNICAL CHARACTERISTICS AND DIMENSIONS

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2.2 Dimensions
MC
GF
R
Pic. 3 – Dimensions
bottom viewtop view
G Gas inlet (1/2”)
MCH flow (3/4”)
CDHW flow (1/2”)
FCold water inlet (1/2”)
RCH return (3/4”)
Dimensions for connection to base hydraulic kit (option) Dimensions for connection to“plus”hydraulic kit (option)

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2.3 Hydraulic layout
Pic. 4 – Hydraulic layout
1. DHW temperature probe
2. Modulating gas valve
3. CH temperature probe
4. Burner nozzles
5. Burner
6. Ignition/flame sensing electrode
7. Safety thermostat
8. Bi-thermal heat exchanger
9. Flue gas hood
10. Flue gas thermostat
11. Expansion vessel
12. Air purging device
13. Pump
14. Water pressure switch
15. 3 bar safety valve
16. Loading tap
17. DHW flow limiting device – 10 liter per
minute
18. Domestic cold water flow switch
19. Domestic cold water inlet filter
M CH flow
C DHW flow
G Gas intake
F Water mains inlet
R CH return

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2.4 Operating data
Below indicated burner pressures are to be checked after a three minute boiler operation.
CTN 24 AF
Type of gas Max. heat
input
Max. heat
output
Min. heat
output
Gas mains inlet
pressure
Diameter of
nozzles Burner pressure
(kW) (kW) (kW) (mbar) (mm) (mbar)
min max
Methane Gas
G20 24.5 22.2 10.8 20 1.30 3.2 12.5
Butane Gas G30 24.5 22.2 10.8 29 0.78 6.6 27.5
Propane Gas
G31 24.5 22.2 10.8 37 0.78 8.5 35.5
No. 2 chart – Adjustment data
Hot water supply ΔT 45°C = 7,1 l/min
Hot water supply ΔT 40°C = 8,0 l/min
Hot water supply ΔT 35°C = 9,1 l/min
Hot water supply ΔT 30°C = 10,6 l/min*
Hot water supply ΔT 25°C = 12,7 l/min*
*mixed water to the tap
2.5 General characteristics
CTN 24 AF
Equipment category - II2H3+
Number of burner nozzles installed n° 11
Minimum CH flow rate l/h 550
Minimum CH pressure bar 0.5
Maximum CH pressure bar 3
Minimum DHW pressure bar 0.5
Maximum CH pressure bar 8
DHW specific capacity (Δt 30 °C) l/min 10.6
Electric power Supply – Voltage / Frequency V - Hz 230-50
Power mains supply fuse A 2
Maximum power consumption W 61
Pump absorption W 41
Electric protection rating IP X4D
Net weight Kg 24.9
Methane gas consumption (*) m3/h 2.59
Butane gas consumption kg/h 1.93
Propane gas consumption kg/h 1.90
Maximum CH working temperature °C 83
Maximum DHW working temperature °C 58
Total capacity of expansion vessel l 6
Maximum recommended CH system capacity (**) l 100
No. 3 chart – General characteristics
(*) Value related to 15°C – 1013 mbar condition
(**) Maximum water temperature of 83°C, vessel preloaded at 1 bar.
CTN 24 AF Max. heat output Min. heat output 30% load
Casing heat loss % 3.57 4.85 -
Flue system heat loss with burner on % 5.83 8.65 -
Flue system mass capacity (methane gas) g/s 16.7 16.5 -
Flue temp.– air temp. °C 85 66 -
CO2 (methane - propane - butane) % 5.7 / 7.4 / 7.3 2.7 / 3.8 / 3.7 -
Boiler efficiency rating % 90.6 90.0 90.0
Nox emission class - 2
No. 4 chart – Combustion data CTN 24 AF model

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Item Symbol Value Unit Item Symbol Value Unit
Rated heat output Pn22 kW Seasonal space heating energy
efficiency ηS78 %
At rated heat output and high-
temperature regime (*) P422,2 kW At rated heat output and high-
temperature regime (*) η481,6 %
At 30 % of rated heat output and low-
temperature regime (**) P16,0 kW At 30 % of rated heat output and low-
temperature regime (**) η181,1 %
At full load elmax 0,012 kW Standby heat loss Pstby 0,103 kW
At part load elmin 0,011 kW Ignition burner power consumption Pign 0,000 kW
In standby mode PSB 0,002 kW Annual energy consumption QHE 82 GJ
Emissions of nitrogen oxides NOx141 mg/kWh
Daily electricity consumption Qelec 0,038 kWh Daily fuel consumption Qfuel 25,370 kWh
Annual electricity consumption AEC 8 kWh Annual fuel consumption AFC 19 GJ
C
B
Seasonal space heating energy efficiency class
Water heating energy efficiency class
For combination heaters:
Model(s): PANAREA COMPACT CTN 24 AF
Condensing boiler: no
Low-temperature (**) boiler: no
B1 boiler: yes
Cogeneration space heater: no If yes, equipped with a supplementary heater: -
Combination heater: yes
For boiler space heaters and boiler combination heaters:
Useful heat output
For boiler space heaters and boiler combination heaters:
Useful efficiency
Auxiliary electricity consumption Other items
%
(*) High-temperature regime means 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet.
(**) Low temperature means for condensing boilers 30 °C, for low-temperature boilers 37 °C and for other heaters 50 °C return temperature (at heater inlet).
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Contact details: FONDITAL S.p.A. - Via Cerreto, 40 I-25079 VOBARNO (Brescia) Italia - Italy
Declared load profile XL Water heating energy efficiency ηwh
2.6. ERP and Labelling data
No. 5 chart - ERP and Labelling data

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The boiler is designed as II2H3+ category and is to be installed in compliance with laws and standards in force in the country of installation.
3.2. Installation
Installation and maintenance procedures are to be implemented employing exclusively accessories and spare parts which
are approved and supplied by the manufacturer. Correct boiler operation is not guaranteed when using accessories and
spare parts which are not manufacturer approved and supplied.
3.2.1. Packaging
The boiler is shipped in a sturdy cardboard box.
Remove boiler from cardboard box and check its integrity.
The packing materials can be recycled: disposal of must be managed via specific waste collection sites.
Keep packaging out of the reach of children, as it may be source of danger.
The manufacturer shall not be held responsible for damage to people, animals, or property due to failure in following the above mentioned
instructions.
Packaging includes one plastic bag containing:
a) installation, use and maintenance manual;
b) wall mounting template (pic. 5);
d) two screws and wall plugs in order to affix the boiler to the wall.
3.2.2. Choosing where to install the boiler
The following must be taken into account when choosing where to install the boiler:
- the indications given in …“Flue gas discharge system” paragraph;
- check the wall to be adequately well-built avoiding to fit the boiler on fragile walls;
- after the installation, check that 1 cm to the right and 1 cm to the left of the boiler was left for casing removal;
- Do not fit the boiler above any equipment that may prejudice proper operation (steam and grease vapor emitting kitchen appliances, washing
machines, etc.);
- Do not install boilers with a natural draught in rooms with a corrosive or very dusty atmosphere, such as hair salons, laundries, etc., as that may
greatly reduce boiler lifespan.
3. INSTRUCTIONS FOR THE INSTALLER
3.1 Installation standards

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pic. 5 - Installation Template
3.2.3. Positioning the Boiler
Each unit is supplied along with a paper template, in the
package, allowing positioning the pipes connecting CH
system, DHW system, gas supply, and air intake/flue gas
discharge ducts to the boiler before installing the boiler
itself.
The template is made of highly resistant paper and is
to be affixed to the wall on which the boiler is to be
mounted using a carpenter’s level. It provides all the
indication required in order to drill the holes for fixing the
boiler to the wall, the boiler is secured to the wall using
two screws and wall plugs.
The lower part of the template shows the areas to be
marked for the couplings positioning of boiler connec-
tion to the gas supply pipe, water mains supply pipe,
DHW flow pipe, CH flow and return pipes.
The upper part of the template shows the areas to be
marked for positioning of air intake and flue gas dischar-
ge ducts.
DANGER
In the case of proximity with flammable walls
and passages through walls, apply insulating
material between the wall and the flue gas
venting duct.
IT ES FR PL PT RU NL DE GB GR RO CZ HU TR
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forzatoTiro forzado Tirage forcéСiąg wymuszony Tiragem forçada
Принудительная
тяга
Geforceerde
trek Raumluftu- nabhängigForced draught Αναγκαστικός ελκυσμός Tiraj forţat Nucený tah Ventilátor Hermetik fanlı
CUscita acqua
calda sanitaria
Salida agua
caliente sani-
taria
Sortie eau
chaude sani-
taire
Wyjście ciepłej
wody
użytkowej
Saída de
água quente
sanitária Выход ГВС Uitgang warm
tapwater
WW
(Auslauf War-
mwasser) DHW Έξοδος
θερμού νερού
οικιακής
Ieşire apă cal-
dă menajeră Výstup TPV HMV csatlakozás Sıcak su çıkış
FIngresso
acqua fredda
sanitaria
Entrada agua
fría Eau froide sanitaire Wejście wody zimnej
Entrada de
água
fria
Вход
холодной
воды
Ingang koud
tapwater
KW
(Einlauf Kal-
twasser)
Domestic
cold water Είσοδος ψυχρού νερού Intrare apă rece Přívod studené vody Hidegvíz csatlakozás Soğuk su giriş
RRitorno
impianto
riscaldamento
Retorno
instalación
calefacción
Retour instal-
lation Powrót systemu
ogrzewania
Retorno do
sistema de
aquecimento
Возврат от
системы
отопления
Terugvoer
verwarming-
sinstallatie
RL
(Rücklauf
Heizanlage) CH return Επιστρ οφή
εγκατάστασης
θέρμανσης
Retur
instalaţie
încălzire
Vratné
potrubí ÚT
Fűtési
rendszer
visszatérő
csatlakozás
Kalorifer
dönüş
MMandata
impianto
riscaldamento
Ida
instalación
calefacción
Départ
installation Zasilanie systemu
grzewczego
Ida do sistema
de
aquecimento
Подача
в систему
отопления
Toevoer
verwarming-
sinstallatie
VL
(Vorlauf Hei-
zanlage)
Προσαγωγή
εγκατάστασης
θέρμανσης
Tur instalaţie
încălzire Průtok vody
Fűtési
rendszer
előremenő
csatlakozás
Kalorifer
gidiş
GIngresso
gas Entrada gas Entrée gaz Wejście gazu Entrada de gás Подача газа GasingangGas (Gaseinlass) Gas inlet Είσοδος αερίου Racord gaz Přívod plynu Gázcsat- alkozás Gaz
0DIMACAR22

17
3.2.4. Installing the boiler
Before connecting the boiler to the CH and DHW pipe systems, clean the pipes carefully and eliminate
any metal left during manufacturing and welding process, any oil or grease that may be left and that could damage
the boiler or alter its operation if it reaches the boiler.
Do not use solvents as they could damage components.
Exclusively employ original and manufacturer supplied, air intake/flue gas discharge systems in order to ensure correct
boiler operation
The manufacturer shall not be held responsible in case of damage to people, animals, or property due to failure
in following the above mentioned information.
In order to install the boiler, proceed as follows:
- affix the template to the wall;
- check that 1 cm to the right and 1 cm to the left of the boiler is left for casing removal;
- provide two 12 mm Ø holes in the wall for the boiler wall plugs, insert the wall plugs provided with the boiler and place in the screws;
- when necessary provide holes in the wall to allow air intake and/or flue gas discharge pipes to pass through it;
- Position the couplings for connection to the gas supply pipe (G), the cold domestic water supply pipe (F), the domestic cold water flow
pipe (C), and the central heating flow (M) and return pipes (R), as shown on the template (lower area);
- Hook the boiler to the previously provided screws;
- Connect the boiler to the feed pipes;
- Connect the boiler to the air intake and flue gas discharge system (refer to paragraph 3.2.5);
- Connect power supply and ambient thermostat (when available).
3.2.5. Air intake and flue gas discharge system
The Manufacturer shall not be held liable for damage resulting in incorrect installation, use, modification of the
equipment or non-observance of instructions provided by the manufacturer or applicable installation standards for
the product.
In terms of the flue discharge into the atmosphere, comply with applicable laws and prescriptions in the country
of installation.
In existing buildings, this natural draught boiler must be connected only to flue pipes shared by several houses to vent the combustion
residues outside the premises inside which boiler is installed.
Boiler takes the air necessary to combustion directly from the installation premises and features a wind-proof flue.
Due to a lower efficiency, any other use of this boiler must be avoided as it would result in a higher energy consumption and higher
operating costs
.
The boiler is equipped with a safety device which is oversees flue gas exhaustion.
In case of malfunction of the air intake/flue gas discharge system, the device shuts down the equipment and no. 1
LED turns on (yellow).
It is strictly forbidden to tamper or de-activate the safety device.
Should the boiler repeatedly shut down, it is necessary to have the boiler air intake/flue gas discharge ducts checked,
they could be obstructed or incorrectly sized for flue gas exhaust into the atmosphere.
Damage and/or injury caused by incorrect installation and/or incorrect use and/or unauthorized changes to the boiler and/or non-
observance of the manufacturer’s instructions and/or of the relative standards/laws in force in the country of installation, shall release
the manufacturer from any and all liability.
Connecting to the chimney
The chimney is indispensable for correct boiler operation; it must therefore comply with the following requirements:
- it must be made of waterproof material and be resistant to flue gas temperature and related condensate;
- it must have appropriate mechanical characteristics and low thermal conductivity;
- it must be perfectly sealed;
- it must be as vertical as possible and the roof terminal is to have a removable cap for inspection and cleaning;
- the chimney diameter is not to be less wide than the boiler flue gas outlet diameter; squared or rectangular section chimneys must bear an
internal section, 10% larger than the section connected to the boiler anti-wind gust device;
- starting from the boiler, the duct connecting to the chimney is to follow a vertical direction and must be long not less than twice its diameter
before joining the chimney.

18
Direct emission into the atmosphere
Natural draught boilers can discharge flue gas directly into the atmosphere via a duct which goes through the outside walls of the building and
ends with an anti-wind gust device terminal.
The flue gas exhaust duct is to comply with the following requirements:
- its sub-horizontal part inside the building must be as short as possible (not longer than 1,000 mm);
- it is not to have more than 2 direction changes;
- it can host only one single boiler flue gas exhaust system;
- its section, which is passing through the wall is to be protected by a sheath duct; the part of the sheath duct facing the inside of the building is to
be sealed, while the part facing outwards is to be left open;
- its end section, on which the terminal is to installed, is to protrude from the wall of the building for a length of a
least twice the diameter of the duct;
- the terminal is to be positioned no less than 1.5 meters higher than the flue gas exhaust duct from the boiler (see pic. 6).
2 Ø min. 2 Ø min.
1,5 m min.
1,5 m min.
Ø
Ø
2 Ø
2 Ø
1 m max. 1 m max.
> 3%
> 3 Ø > 3 Ø
0
1
3
6
5
42 bar
1
3
5
42 bar
1
0
1
3
6
5
42 bar
1
3
5
42 bar
3
42 bar
1
3
5
42 bar
0
1
3
6
5
42 bar
1
3
5
42 bar
1
0
1
3
6
5
42 bar
1
3
5
42 bar
1
3
5
42 bar
1
3
5
42 bar
> 3%
Pic. 6 – Connection to the chimney
400
700
250
Ø 130,8
121
200 200
0
1
3
6
5
42 bar
1
3
5
42 bar
1
0
1
3
6
5
42 bar
1
3
5
42 bar
3
42 bar
1
3
5
42 bar
Pic. 7 – Dimensions for connection to the chimney

19
GASKET
Pic. 8 – Gas main connection
3.2.6 Checking combustion efficiency
In order to check combustion efficiency, turn no. 5 knob fully clockwise and completely open one or two domestic hot water taps so that the
boiler will operate at max. output.
In order to verify combustion efficiency the following measurements must be implemented:
• assess combustion air from the boiler installation room;
• assess ue gas temperature and CO2 from the special sampling port passing through the ue gas venting duct.
If sampling port is not present, it must be provided by the boiler operation and maintenance manager in compliance with the prevailing
regulations and standards.
Sampling port must be equipped with a special sealing and must be correctly closed after each reading.
Perform measurements while the boiler is operating at working temperature.
Once the above procedure is completed, close the domestic hot water taps and position no. 5 knob (pic. 1) to the desired setting.
3.2.7. Gas mains connection
Cross-section of gas supply pipe must be equal or greater than the boiler one. Cross-section size depends on its length, layout pattern, gas flow
rate. It is therefore to be sized accordingly.
Comply with installation standards enforced in the installation country. They are considered as an integral part of this booklet.
Remember that before operate an internal gas distribution system and before connecting it to a meter, it must be checked for leaks.
In order to perform a leak test, operate according to the following indication:
- The leak test is to be carried out before the pipes are covered. The leak test must not be carried out using flammable gas: use air or nitrogen
for this purpose.
- Once gas is in the pipes, leak test by a naked flame is forbidden. Use specific products available on the market.
When connecting a boiler to gas supply network the use of an appropriately sized and made gasket (pic. 8).
The boiler gas inlet thread configuration is not suitable for hemp, plastic tape or similarly made gaskets.

20
3.2.8. Plumbing connections
Prior to installing the boiler, the hydraulic system should be cleaned in order to remove impurities; they might be present in system components
and damage the pump or the heat exchanger.
CENTRAL HEATING
CH flow pipe and CH return pipe must be connected to their relevant 3/4” coupling on the boiler (see pic. 5).
When sizing CH system pipes, bear in mind load losses caused by radiators, thermostatic valves, radiator gate valves, and the configuration of
the system itself.
It is advisable to convey the discharge flow of boiler safety valve to the sewer system. Should that not be performed, and the
safety valve be activated, flooding of the room in which the boiler is installed may occur.
The manufacturer shall not be held responsible for any damage resulting from failure in observing the above mentioned technical
provision.
DOMESTIC HOT WATER
DHW flow pipe and water mains pipe must be connected to their relevant 1/2”couplings C and F on the boiler (pic. 5).
Hardness of water supplied to the boiler may increase heat exchanger cleaning and /or replacement frequency.
WARNING
Depending on hardness level of the water supplied, it might be necessary installing a suitable water treatment device for domestic use
and in compliance with applicable laws and standards.
Water treatment is always advisable when water supplied to the boiler is more than 20°F hard.
Water supplied by commonly marketed water softeners, due to PH level induced in water, may not be compatible with some compo-
nents in system.
3.2.9. Power mains connections
The boiler is supplied with a three-poled power cable, already connected to the electronic board and it is provided with an anti-rupture firming
clamp.
The boiler is to be connected to a 230V-50Hz electric power supply.
Comply with phase / neutral polarity sequence when power connecting the boiler.
Installation standards must be complied with and they are considered as an integral part of this booklet.
An easily accessible two-poled switch, with a minimum 3 mm distance between contacts, is to be installed outside of the boiler. The switch is to
allow power supply cut-off in order to safely perform maintenance and service procedures.
Power supply to the boiler must be fitted with a differential magnetic-thermal automatic switch of suitable disconnection capacity.
Electric power supply must be properly earthed.
The above mentioned safety measure must be verified. If in doubt, ask a qualified technician to thoroughly check the power network.
WARNING
The manufacturer shall not be held responsible for any damage due to failure in grounding the system: gas, hydraulic, or CH
system pipes are not suitable for grounding power networks.
3.2.10. Room thermostat connection (optional equipment)
The boiler is designed to be connected to an ambient thermostat (not supplied with the boiler).
Room thermostat contacts must be properly sized in compliance with a load of 5 mA load at 24 Vdc.
Ambient thermostat wiring must be connected to the relevant terminal board (see electric layout), after removing the
jumper supplied as standard with the boiler.
The ambient thermostat wirings are NOT to be grouped together with power mains supply cables.