Didactic manual Nias-Libra Dual AST 14 C152-00...NIAS DUAL BTFS ENCASED Instantaneous boiler, elevated DHW production with 25 litre water tank, excludable by the user. Fondital version

DIDACTIC MANUAL

FAMILY: Wall-hung boilers

GROUP: Aqua Premium (compact with excludable water tank)

MODELS: Nias Dual BTFS Libra Dual BTFS

CODE: AST 14 C152/00

______________________________________________ 1st Edition, March 2006

________________________________________________________________________________ 2 AST 14 C 152/00

Contents CHAPTER 01 GENERAL INFORMATION

1.1 - Models 1.2 – Dimensions

1.3 – Complete view and components ___________________Page 03

CHAPTER 02 OPERATION

2.1 – Operation criteria 2.2 – Control panel

2.3 – Regulation fields 2.4 – Pump anti-blockage and anti-freeze system

___________________Page 06

CHAPTER 03 CHARACTERISTICS AND TECHNICAL DATA

3.1 – Construction characteristics 3.2 – Operating characteristics

3.3 – Operational data 3.4 – Technical dat a

___________________Page 13

CHAPTER 04 GAS VALVE AND CONVERSIONS

4.1 – Gas valve SIT 845 4.2 – Gas conversions

4.3 – Gas valve regulation 4.4 – Chimney sweep function

___________________Page 16

CHAPTER 05 HYDRAULIC GROUP

5.1 – Complete hydrau lic group 5.2 – Secondary plate heat exchanger

5.3 –Three way valve 5.4 – 2 way interception valve

___________________Page 19 CHAPTER 06 ELECTRONICS

6.1 – Electronic board - jumper 6.2 – Electronic board – ignition phase

6.3 – Electronic board – diagram 6.4 – Relay board

6.5 – Remote control 6.6 – Sliding temperature function

___________________Page 21

CHAPTER 07 FLUE GAS SYSTEMS

7.1 –Coaxial p ipes 100/60mm 7.2 – Split pipes 80mm

7.3 – Positioning of terminals ___________________Page 24

CHAPTER 08 MAINTENANCE

8.1 – Standards and recommendations 8.2 – Maintenance schedule

___________________Page 26

CHAPTER 09 TROUBLESHOOTING

9.1 – Table ___________________Page 27

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CHP.1 GENERAL INFORMATION 1.1 MODELS NIAS DUAL BTFS INDOOR

Instantaneous boiler, elevated DHW production with 25 litre water tank, excludable by the user. Fondital version. Model to be installed inside the apartment. Output: 24, 28 and 32 kW

LIBRA DUAL BTFS INDOOR

Instantaneous boiler, elevated DHW production with 25 litre water tank, excludable by the user. Nova Florida version. Model to be installed inside the apartment. Output: 24, 28 and 32 kW

NIAS DUAL BTFS ENCASED

Instantaneous boiler, elevated DHW production with 25 litre water tank, excludable by the user. Fondital version. Model with reduced depth placed inside a metal casing to be built into the external wall. Output: 24, 28 and 32 kW

LIBRA DUAL BTFS ENCASED

Instantaneous boiler, elevated DHW production with 25 litre water tank, excludable by the user. Nova Florida version. Model with reduced depth placed inside a metal casing to be built into the external wall. Output: 24, 28 and 32 kW

FOR ALL NIAS AND LIBRA DUAL BOILERS: Elevated output (HEATING): Standard ref. 92/42/CEE Elevated output (DOMESTIC HOT WATER): Standard ref. prEN 13203 Continuous modulation in DHW and heating DHW expansion vessel: 2 Litres Heat exchanger DHW: 22 plates for 24kW and 26 plates for 28 and 32kW Production Domestic Hot Water (l/10 mins): 160 for 24kw with ∆t 30°C 180 for 28kw with ∆t 30°C

200 for 32kw with ∆t 30°C

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1.2 DIMENSIONS

Nias and Libra Dual BTFS indoor

ELECTRIC PROTECTION: IP44

Nias and Libra Dual BTFS in-wall

ELECTRIC PROTECTION: IXP5D

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1.3 COMPLETE VIEW and COMPONENTS

DHW plate heat exchanger

Hydraulic group

DHW plate

Control board Electronic

board

Flow pressare switch

CH pump

Flow meter

Safety valve

DHW pump Two-way valve

Ignition transformer

CH expansion

vessel

DHW expansion

vessel

pressure switch

Fan

Air purging valve

Flue gas hood

Mono-thermal

exchanger

Burner

Electrodes

Gas valve

Water tank

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CHP.2 OPERATION 2.1 OPERATION CRITERIA WATER TANK

The boiler heats up automatically the water tank in a very short time when the aqua premium turns on. The system keeps the water in the tank at 10°C higher than the set DHW temperature. WATER TANK TIMES 24 kW – about 6 minutes and 30 seconds 28 kW – about 5 minutes and 30 seconds 32 kW – about 4 minutes and 30 seconds

WATER TANK TYPE Stratified water tank Internal glass finish Capacity: 25 litres Losses: about 1°C / hour for built-in – about 1°C / 3 hours for indoor

Flow meter

Flow Return

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When the water tank switch is off, the DHW pump and the two way interception valve are not active, in this situation the boiler operates as a standard instantaneous boiler: HEATING MODE

DHW MODE (INSTANTANEOUS)

Return Flow

Flow meter

Return Flow

Flow meter

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When the water tank switch is on, the DHW pump and the two way interception valve are active, the boiler can utilise the hot water present in the water tank. This process can take place in two ways depending on the water flow to the tap requested by the end user: reduced withdrawal and premium withdrawal. DHW MODE (AQUA PREMIUM WITH REDUCED WITHDRAWAL)

This occurs when the end-user requests a quantity of DHW less than the quantity permitted by a flow regulator placed after the plate heat exchanger (8l/min for 24kW, 10l/min for 28 Kw and 12l/min for the model with 32 Kw output). Example: if the end-user requires less than 8 litres per minute (24kW), the remaining quantity of hot water produced by the plate heat exchanger enters the water tank and in turn mixes at the outlet with the water in system thus raising the inlet temperature at the DHW heat exchanger.

The system is particularly useful where there are particularly low temperatures at the inlet to the water system and/or in order to achieve water at an ideal temperature more rapidly for use.

Flow meter

Return Flow

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DHW MODE (AQUA PREMIUM WITH ELEVATED WITHDRAWAL)

This occurs when the end-user requests a quantity of DHW greater than the quantity permitted by a flow regulator placed after the plate heat exchanger (8l/min for 24kW, 10l/min for 28 Kw and 12l/min for the model with 32 Kw output). By utilising the hot water in the water tank (at higher temperatures) together with the production of domestic hot water produced by the plate heat exchanger of the appliance, the user is in a position to make use of a significant quantity of hot water in a determined space of time (until the stratified water tank has been completely emptied).

The system is particularly useful where in certain times of the day it is necessary to supply several users contemporarily (for example on the return home of workers in the evening) without having to connect a boiler of greater capacity and size with the same output at greater costs. It is convenient during the rest of the day because it can be disabled with the on/off switch or programmer thus transforming itself into a traditional instantaneous wall-hung boiler.

Flow

Flow meter

return

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2.2 CONTROL PANEL

1 Power light (green) 2-7 Indication light (red) 8 Indication light (green) 9 Boiler mode selector – boiler reset 10 Domestic hot water supply knob 11 CH water temperature knob 12 Water pressure gauge 13 Aqua Premium system power switch The warning lights 1-8 can indicate two different situations: inform in the case of normal operation of the boiler or warn in the case of malfunctioning or shut-down of the boiler.

INDICATION LIGHTS DURING NORMAL OPERATION OF THE BOILER

2 3 4 5 6 7 Condition Red Red Red Red Red Red

Flow temperature 20° or less OFF OFF OFF OFF OFF OFF

Flow temperature 30° ON OFF OFF OFF OFF OFF

Flow temperature 40° OFF ON OFF OFF OFF OFF

Flow temperature 50° OFF OFF ON OFF OFF OFF

Flow temperature 60° OFF OFF OFF ON OFF OFF

Flow temperature 70° OFF OFF OFF OFF ON OFF

Flow temperature 80° OFF OFF OFF OFF OFF ON

Flow temperature 90° or more OFF OFF OFF OFF OFF ON L

Key chart: OFF - Led off ON - Led on, fixed ON L - Led on, flashing

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WARNING LIGHTS IN THE CASE OF MALFUNCTIONING OR SHUT-DOWN OF THE BOILER

1 2 3 4 5 6 7 8 Condizione Green Red Red Red Red Red Red Red

Flame detection shut-down X OFF OFF OFF ON L OFF OFF OFF Safety thermostat shut-down X OFF ON L OFF OFF OFF OFF OFF Water pressure shut-down X OFF OFF OFF OFF ON L OFF OFF Smoke ther mostat./press. shut- down X OFF OFF ON L OFF OFF OFF OFF Flow probe malfunction X ON L OFF OFF OFF OFF OFF ON L DHW probe malfunction X ON L OFF OFF OFF OFF OFF OFF Water tank probe malfunction X ON LA OFF OFF OFF OFF OFF ON LA

Gas modulator malfunction X OFF ON L OFF OFF OFF OFF ON L Remote control malfunc tion X OFF OFF ON L OFF OFF OFF ON L Flow temperature 90° or more X OFF OFF OFF OFF OFF ON L X Water tank in heating phase X X X X X X X ON Power connection ON X X X X X X X Key chart: OFF - Led off ON - Led on, fixed ON L - Led on, flashing ON LA - Led on, flashing alternately

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2.3 REGULATION FIELDS The regulation field of the heating temperature is from 35 to 78 °C. To prevent frequent and switching off in the heating mode, the boiler has a 4 minute waiting time between subsequent ignitions. Should water temperature in the system fall below 40°C the waiting time is aborted and the boiler re-ignites. Boiler electronics always gives priority to DHW over CH supply. DHW temperature can be adjusted within 35 to 57 °C range. 2.4 PUMP ANTI-FREEZE AND ANTI-BLOCKAGE SYSTEM The anti-freezing protection system is active in the positions summer/winter/anti-freeze. When the heating water temperature probe detects a water temperature below 5°C, the boiler turns on and remains on at its minimum thermal power until the temperature of the central heating water reaches a temperature of 30°C or at least 15 minutes have elapsed.

ATTENTION The anti-freeze function only protects the boiler, it does not protect the entire heating system. To protect the heating system with the boiler in the anti-freeze position or off, utilise specific products. When the selector is in the OFF position the anti-freeze function is not active. The anti-freeze function also protects the water tank: when the water tank probe detects a water temperature below 5°C, the boiler turns on and remains on at the minimum thermal power until the temperature of the water in the water tank reaches a temperature of 10°C or until at least 15 minutes have elapsed. In the built-in model, for some requirements, an option is designed in order to solve winter problems: a kit of resistances for the protection of the connection fittings between the boiler and the system. Should the boiler shut down, the circulation of the pump is at any rate guaranteed. Should the boiler remain inactive while being connected to the electricity supply, every 24 hours the circulation pump and the deviating valve are activated for 3 minutes, in order to avoid blockage.

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CHP.3 CHARACTERISTICS AND TECHNICAL DATA 3.1 CONSTRUCTION CHARACTERISTICS - Mono-thermal, high output, copper heat exchanger. - DHW Stainless steel plate heat exchanger. - Vertical stratification 25 litre water tank with magnesium anode. - Three-speed CH circulation pump equipped with air-purging device. - DHW circulator. - Motorized cut-off valve. - 8 litre CH expansion vessel for BTFS 24 model and 10 litre for BTFS 28 and BTFS 32 models. - 2 litre DHW expansion vessel. - Low water pressure switch. - DHW priority flow switch. - DHW flow limiting device (8 l/min – 24Kw, 10 l/min – 28Kw, 12 l/min – 32Kw). - Adjustable by-pass. - CH system loading and draining taps. - CH water, DHW and water tank temperature probes. - Safety l imit thermostat. - IP44 electrically protected control panel. - Electronic safety board and integrated modulation. - Electronic ignition with separate transformer. - Flue gas pressure switch. - Gas valve with double shutter. 3.2 OPERATING CHARACTERISTICS - DHW priority function. - CH mode electronic flame modulation, timer controlled flame rising ramp (50 seconds). - DHW mode electronic flame modulation. - Boiler and storage tank anti-freezing function. - Maximum heat input adjusting trimmer. - Ignition heat input adjusting trimmer. - Timer-controlled “chimney sweep” function (15 minutes). - Ignition flame propagation function. - Timer-controlled room thermostat (240 seconds when CH flow temperature >40°C). - CH pump post-circulation function in boiler winter mode (180 seconds). - CH pump post-circulation function after DHW production, in boiler winter mode only (6 seconds). - DHW post-ventilation function in boiler summer mode only (6 seconds - CTFS). - Post-ventilation safety function (ON: 95°C; OFF: 90°C - CTFS). - Anti-blocking function for DHW pump and deviating valve (6 seconds of pump operation every 24

hours of boiler inactivity).

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3.3 OPERATIONAL DATA BTFS 24

Burner pressure [mbar]

Function Max. heat input [Kw]

Max. heat output [Kw]

Min. heat output [Kw]

Gas mains pressure

[mbar]

Nozzle diameter

[mm] min max

Methane Gas G20 25,5 23,8 9,5 20 1,25 2,5 13,5

Butane Gas G30 25,5 23,8 9,5 29 0,77 4,2 27,0 Propane Gas G31 25,5 23,8 9,5 37 0,77 5,5 35,7

Instantaneous DHW supply ∆t 30°C = 11,4 litres per minute Instantaneous DHW supply ∆t 35°C = 9,7 litres per minute Instantaneous DHW supply ∆t 25°C = 13,6 litres per minute DHW supply with Aqua Premium f unction ∆t 30°C = 160 l/10 min DHW supply with Aqua Premium f unction ∆t 25°C = 192 l/10 min

BTFS 28





Gas mains pressure

[mbar]

Nozzle diameter

[mm] min max

Methane Gas G20 30,5 28,4 10,0 20 1,35 1,3 11,5

Butane Gas G30 30,5 28,4 10,0 29 0,80 3,5 28,5 Propane Gas G31 30,5 28,4 10,0 37 0,80 4,5 33,0

Instantaneous DHW supply ∆t 30°C = 13, litres per minute Instantaneous DHW supply ∆t 35°C = 11,6 litres per minute Instantaneous DHW supply ∆t 25°C = 16,3 litres per minute DHW supply with Aqua Premium f unction ∆t 30°C = 180 l/10 min DHW supply with Aqua Premium f unction ∆t 25°C = 216 l/10 min

BTFS 32





Gas mains pressure

[mbar]

Nozzle diameter

[mm] min max

Methane Gas G20 33,6 31,3 12,2 20 1,40 1,7 9,2

Butane Gas G30 33,6 31,3 12,2 29 0,78 4,1 28,2

Propane Gas G31 33,6 31,3 12,2 37 0,78 5,5 34,8

Instantaneous DHW supply ∆t 30°C = 15,0 litres per minute Instantaneous DHW supply ∆t 35°C = 12,8 litres per minute Instantaneous DHW supply ∆t 25°C = 17,9 litres per minute DHW supply with Aqua Premium f unction ∆t 30°C = 200 l/10 min DHW supply with Aqua Premium f unction ∆t 25°C = 240 l/10 min

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3.4 TECHNICAL DATA BTFS 24 BTFS 28 BTFS 32 Boiler category II2H3+ II2H3+ II2H3+ Burner nozzles No. 12 13 15 Minimum CH flow rate L/h 900 1000 1200 Minimum CH pressure Bar 0,5 0,5 0,5 Maximum CH pressure Bar 3 3 3 Minimum DHW pressure Bar 0,3 0,3 0,3 Maximum DHW pressure Bar 8 8 8

DHW specific flow rate (∆t 30 according to EN 625) L/ 10 min. 160 180 200

Electrical power supply –Voltage/Frequency V - HZ 230 - 50 230 - 50 230 - 50 Power mains fuse A 2 2 2 Maximum power consumption W 180 200 230 Net boiler weight Kg 67,0 67,5 68 Methane gas consumption (*) m3/h 2,70 3,23 3,46 Butane gas consumption kg/h 2,01 2,40 2,62 Propane gas consumption kg/h 1,98 2,37 2,51 Maximum CH working temperature °C 83 83 83 Maximum DHW working temperature °C 62 62 62 Total capacity of expansion vessel L 8 10 10 Maximum recommended CH system capacity (**) L 160 200 200

(*) Value rel ated to 15°C – 1013 mbar condition - (**) Maxi mum temperature of water 83°C, expansion vessel pressure pre-charge 1 bar

BTFS 24 Max output Min output 30% output

Outer casing heat loss % 0,23 0,23 - Flue system heat loss with burner on % 6,57 9,67 - Flue gas mass capacity g/sec. 14,0 14,4 - Flue temp. – Air temp. °C 75 67 - CO2 value % 7,2 2,8 - Boiler efficiency rate % 93,2 90,1 90,2





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CHP.4 GAS VALVE AND CONVERSIONS 4.1 GAS VALVE SIT 845

MAX/MIN RESISTANCE VALUES OF THE COILS

EV1 – 880 Ohm at 220 Vac

EV2 – 6900 Ohm at 220 Vac

RESISTANCE VALUES OF THE REGULATION COIL

78,2 Ohm

Gas inlet pressure check

Gas outlet pressure check

ELECTRICAL CONNECTIONS OF MOTORIZED VALVES

GAS OUT To burner

GAS IN Mains supply

Maximum adjusting screws

Minimum adjusting screws

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4.2 GAS CONVERSIONS CONVERSION FROM NATURAL GAS TO LPG � Check that the boiler is disconnected from power mains; � Remove the main burner; � Remove the main burner nozzles and replace them with those bearing the correct

diameter in relation to the new gas type (see tables in chapter 3.3 “Operational data”) - ATTENTION: it is mandatory to install the copper seals;

� Replace the main burner; � Replace the connection pipe between the gas valve and the manifold of the burner

nozzles; � Access the main electronic board and position the MET-LPG jumper to the LPG

position (see the photo below); � Now proceed with the adjustment of the gas valve (next page). CONVERSION FROM LPG TO NATURAL GAS � Check that the boiler is disconnected from power mains; � Remove the main burner; � Remove the main burner nozzles and replace them with those bearing the correct

diameter in relation to the new gas type (see tables in chapter 3.3 “Operational data”) - ATTENTION: it is mandatory to install the copper seals;

� Replace the main burner; � Replace the connection pipe between the gas valve and the manifold of the burner

nozzles; � Access the main electronic board and position the MET-LPG jumper to the MET

position (see the photo below); � Now proceed with the adjustment of the gas valve (next page).

Natural gas

Gas outlet pressure check

LPG

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4.3 GAS VALVE ADJUSTMENT

� Remove the gas inlet pressure check screw by means of a small screwdriver, and connect a manometer in order to verify correct pressure from the network;

� connect a manometer to the gas outlet pressure check after removing the screw of the gas outlet check by means of a small screwdriver;

� start the boiler in CH mode and to max output (see paragraph 4.4 “Chimney sweep function);

� remove the plastic protective cap A, act on screw C clockwise to increase pressure and counter-clockwise to decrease it (fully turn the screw clockwise in LPG fuelled boilers);

� after adjusting max pressure, disconnect the blue coil wire in order to operate the boiler at minimum output;

� adjust minimum pressure by acting on the internal screw of the gas (while holding still the external screw);

� check correct operation of the burner verifying that the ignition is proper and quiet, act on PACC trimmer of the electronic board when necessary in order to adjust ignition power (clockwise to increase, anti-clockwise to decrease);

� check for gas leaks; � seal once more the cap screw; � once the above procedure is complete, fill in the tag enclosed with the kit and affix it to

the side of the technical data label of the boiler. 4.4 “CHIMNEY SWEEP” FUNCTION

The boiler has a “chimney sweep” function in order to test boiler combustion efficiency and to adjust the burner. Set the boiler selector knob to WINTER mode and the room thermostat to ON (if available). While the boiler is operating, press the SPA button with a pointed tool (A in the picture below); the boiler will turn OFF and then resume ignition sequence and

proceed operating with a maximum output. The “Chimney sweep” function running time is 15 minutes. In order to deactivate the “chimney sweep” function, turn the selector to any position other than WINTER.

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CHP.5 HYDRAULIC GROUP 5.1 COMPLETE HYDRAULIC GROUP

THE HYDRAULIC GROUP OF NIAS-LIBRA DUAL BOILER WAS DESIGNED COMPLETLEY BY FONDITAL ENGINEERS AS WITH ALL OF THE OTHER HYDRAULIC GROUPS OF OUR BOILERS.

DHW and CH probe parameters: 10Kohm at 25°C with β=3435

Pump

CH probe

DHW probe

Three-way valve motor

DHW plate heat exchanger

3 bar safety valve

Flow pressure gauge

Three-way valve

Loading tap Flow meter

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5.2 SECONDARY PLATE HEAT EXCHANGER

ALFA LAVAL

24 kW 22 plates 28 kW 26 plates 32 kW 26 plates

5.3 THREE-WAY VALVE

5.4 2-WAY INTERCEPTION VALVE

- Maximum working temperature: 88°C - Maximum working pressure: 3 Bar - 230V / 3W T60

Adjustable by-pass

Electric motor

Shutter

By-pass adjusti ng screw

OPEN BY-PASS CLOSED BY-PASS

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CHP.6 ELECTRONICS 6.1 ELECTRONIC BOARD - JUMPER

Fondital Group has standardised the electronics of all of its boiler models, in fact besides the jumper for changing the gas, we find two other jumpers for choosing the boiler model: instantaneous with plates, heating only, with separate tank, with micro-water tank and macro-water tank.

In position F2PIA mono-thermal combination boiler with secondary plate heat exchanger In position F3RIS heating only, suitable for external water tank In position F4BOI combination boiler with water tank In position F5MIC combination boiler with micro-water tank In position F6MAC reserved for future developments

F2PIA F3RIS F4BOI F5MIC F6MAC

Nias and Libra Dual boilers must have the Jumper positioned in the position F2PIA like an instantaneous boiler with plate heat exchanger. 6.2 ELECTRONIC BOARD – IGNITION PHASE

Ventila to re d i co mb ustione

ON/OFF

Ele ttro va lvola

Pre sso stato ariaTe rm osta to fum i

Acc ensione

Rile vazione

Bloc co

Te mp o veri fic a p ressosta to ariao te rmo stato fumi

TW tem po d i atte sa

Ac ce nsio ne d el bruciatore

Bru cia to re a cc esofun zion am ento no rm ale

Temp o d i sicurezza Ts

Bloc co

Funzioni

Te mpi

Functions Shutdown Detection Ignition Air pressure switch Flue gas thermostat Electro-valve Fan ON/OFF

Verification time for air pressare switch Times or flue gas thermostat TW waiting time Burner ignition Burner ON normal operation Safety bime TS Shutdown

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6.3 ELECTRONIC BOARD – DIAGRAM

Indoor only boiler

Standard for ENCASED boiler Optional for INDOOR boiler

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6.4 RELAY BOARD Unlike the compact Dual boilers produced by Fondital without water tank, the Nias Libra Dual is equipped not only with a main electronic board, but with an extra board with relay and connectors to the DHW pump and the motorized two-way interception valve.

NOTE � DHW pump and opening of motorized valve are

connected in parallel; � In Aqua Premium mode: DHW and CH pumps are active, motorized two-way interception valve

open, three-way valve in DHW position. 6.5 REMOTE CONTROL

By means of another board (6SCHEREM00) we can connect a remote control to each product. With it we can control all boiler functions and furthermore we can regulate the parameters directly from indoor (in particular for the built-in boiler) without having to go out in order to activate them. It is possible, in the case of a shut-down, to reset the boiler directly with the remote control by pressing contemporarily the keys “Eco” and “Party”.

ECO PARTY 6.6 “SLIDING” TEMPERATURE FUNCTION The boiler is designed for connection to an outdoor temperature probe which automatically modifies CH flow temperature in relation to the detected outdoor temperature and the programmed in-door temperature; the correction depends on the setting of the thermoregulation coefficient KT (by means of the trimmer Vmin). The boiler electronics recognize the presence of an outdoor temperature probe and activates the thermoregulation function. When an outdoor temperature probe is installed the trimmer adjusting CH temperature looses its function and takes on the programmed in-door temperature. The correcting range operated equals the range of CH temperature, which is also selected by trimmer Vmin. Where there is both an external probe and a remote control, the modulation board will calculate the CH temperature required only for local or zone use; furthermore, it sends the value of the external temperature to the remote control and receives the value of the set indoor temperature from the remote control, which has priority over the value set in the boiler. Based on a room requirement of 20 °C (lower curves), the selection of the heating range is defined by the trimmer Vmin, without considering the presence of the external probe (when turned anti-clockwise it selects the low heating temperature range, whereas turned clockwise it sets the high temperature range). In the case of a room temperature demand other than 20 °C, all the curves move as a consequence (upper curves). External probe parameters: 10Kohm at 25°C with β=3977

CH CURVE DIAGRAM

Temperature (C°)

Outdoor Temperature (C°)

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CHP.7 FLUE GAS SYSTEMS 7.1 COAXIAL PIPES 100/60mm

TYPES: C12-C32-C42 The maximum acceptable length of horizontal coaxial pipes is 3 metres; in the presence of each additional bend, maximum acceptable length must be reduced by 1 metre; furthermore, the duct must have a 1% slope toward the exit, in order to avoid the entrance of rain. The maximum acceptable length of vertical coaxial pipes is 4 metres; in the presence of each additional bends, maximum acceptable length must be reduced by 1 metre.

DIAPHRAGMS

Model Pipe length (m) Flue gas discharge diaphragm diameter (mm)

0,5 < L < 1 Ø 40 1 < L < 3 Ø 45 BTFS 24 3 < L < 4 No diaphragm required

0,5 < L < 3 Ø 42 BTFS 28

3 < L < 4 Ø 45 0,5 < L < 1 Ø 45 1 < L < 2 Ø 47 2 < L < 3 Ø 49

BTFS 32

3 < L < 4 No diaphragm required For each additional bend decrease the max allowable length by 1 meter 7.2 SPLIT PIPES 80mm

TYPES: C12-C32-C42-C52-C82-B22 Air intake BTFS 24 E 28: each 90° wide radius bend equals 1 m in length, each 90° narrow radius

bend equals 1.5 m in length, the load loss at the terminal is not to be considered (with the exception of B22).

Discharge BTFS 24: each 90° wide radius bend equals 1.5 m in length, each 90° narrow radius bend equals 3,5 m in length.

Discharge BTFS 28: each 90° wide radius bend equals 2 m in length, each 90° narrow radius bend equals 4 m in length.

Air intake BTFS 32: each 90° wide radius bend equals 1,5 m in length, each 90° narrow radius bend equals 2 m in length, the load loss at the terminal is not to be considered (with the exception of B22).

Discharge BTFS 32: each 90° wide radius bend equals 2 m in length, each 90° narrow radius bend equals 5 m in length.

The minimum length for the air intake pipe must be 1 metre (with the exception of B22 where there it is, however, mandatory to have a minimum length for gas discharge of 0.5 metres). Install the air intake anti-pulse terminal and the air deflector. Install the air intake diaphragm Ø 51 except on the model BTFS 32.

DIAPHRAGMS C12-C32-C42-C52-C82 B22

Model Pipe length (m) Flue gas discharge

diaphragm (mm) Pipe length (m) Flue gas discharge

diaphragm (mm) 1 < L < 14 Ø 45 0,5 < L < 8 Ø 45

14 < L < 21 Ø 49 8 < L < 14 Ø 49 BTFS 24

21 < L < 28 No diaphragm required


1 < L < 11 Ø 49 0,5 < L < 9,5 Ø 49 BTFS 28 11 < L < 21 No diaphragm

required 9,5 < L < 15,5 No diaphragm

required 1 < L < 10 Ø 49 0,5 < L < 5,5 Ø 51

10 < L < 14 Ø 51 5,5 < L < 10,5 No diaphragm required BTFS 32


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7.3 POSITIONING OF TERMINALS For the wall positioning of the discharge terminals of the boiler, in the cases provided for in DPR n° 551 dated 29/12/99, observe the distances indicated in the following table:

POSITIONING OF THE TERMINALS – FORCED DRAUGHT (extract from standard UNI 7129) POSITION OF THE TERMINAL Under window A 600 Under ventilation opening B 600 Under gutter C 300 Under balcony (1) D 300 From an adjacent window E 400 From an adjacent ventilation opening F 600 From vertical pipes or discharges (2) G 300 From the corner of a building H 300 From the concave part of the building I 300 At ground level L 2500 Between two terminals, vertically M 1500 Between two terminals, horizontally N 1000 From a frontal surface without openings or terminals within a radius of 3 metres from the smoke outlet

O 2000

The same, but with openings or terminals within a radius of 3 metres from the smoke outlet

P 3000

Note: (1) Terminals under a balcony in use must be positioned in such a position that the total distance of the exhaust fumes, from the exit point of the same from the terminal to the outlet from the external perimeter of the balcony, including the height of any protective railing, is not less than 2000 mm. (2) In the positioning of the terminals, distances no shorter than 500 mm must be adopted from materials which are at risk from the action of the combustion products (for example, gutters made of plastic materials, wooden structures, etc.) without adopting adequate shielding precautions in relation to said materials.

POSITIONING OF THE TERMINALS

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CHP.8 MAINTENANCE 8.1 STANDARDS AND RECOMMENDATIONS Once a year, by law, maintenance must be carried out on the boiler. Correct maintenance of the boiler allows the same to operate under the best conditions, protects the environment and makes the equipment fully safe for people, animals and property. Maintenance operations on the boiler must be carried out by qualified personnel. For all maintenance and repairs, the manufacturer recommends its Customers to contact its own network of authorised Assistance Centres that are trained in order to carry out the above-mentioned operations. The user may only clean the casing on the boiler, and this must be done using products for cleaning furniture. 8.2 MAINTENANCE SCHEDULE

CHECK-UP OPERATIONS � general integrity of the boiler; � boiler and netw ork gas supply leakage; � gas supply pressure to boiler; � minimum and maximum gas pressures to boiler nozzles; � boiler ignit ion; � boiler combustion parameters by analysis of f lue (this is to be performed once every tw o

years if boiler is singularly installed. When the system is served by mult iple boilers, the check is to be performed annually);

� f lue system integrity, good state of preservation, and leak test; � air pressure switch operation; � integrity of the safety devices of the boiler in general; � water leaks and rusty areas on the boiler’s couplings; � eff iciency of the system’s safety valve; � expansion vessel loading pressure; � water pressure sw itch eff iciency;

CLEANING OPERATIONS � boiler internal areas; � gas nozzles; � air intake and f lue gas exhaust system; � f lue side of the heat exchanger.

WHEN IMPLEMENTING A MAINTENANCE SCHEDULE FOR THE FIRST TIME TO THE BOILER � verify the compliance declaration of the system; � verify the system booklet. � verify boiler room suitability; � verify the f lue system ducts, the diameters and length of the same; � verify the boiler installation in accordance w ith the instructions contained in this manual.

________________________________________________________________________________ 27 AST 14 C 152/00

CHP.9 TROUBLESHOOTING 9.1 TABLE

BOILER STATUS MALFUNCTION PROBABLE CAUSE SOLUTION Gas suppl y failure Check gas pr essure

Gas val ve has disconnected Reconnect gas val ve Gas val ve is faulty Replace it

The burner does not ignite

The el ectronic board is faulty Replace it Spar k electrode is faulty Replace it

Ignition transfor mer is faulty Replace it Burner does not ignite

The el ectronic board is faulty Replace it

The el ectronic board does not detect flame: inverted phase

and neutral

Verify correct neutral and phase connections

Flame detection electrode wire is disconnected or faulty

Connect flame detec tion electrode wire or replace it

Detection el ectrode is faulty Replace it

The el ectronic board does not detect the flame: it is faulty Replace the el ectronic board

P ACC ignition value set poi nt is too l ow

Increase it

The boiler has shut down, the red light no. 5 is flashing

Burner ignites for a few seconds and then goes off

Min. heat input is not set correctly Check burner adjus tment

Flue pressure switch is faulty Check flue pr essure switch and

replace if necessar y Silicone pipes are disconnec ted

or faulty Reconnect or repl ace silicone

pipes Insufficient air intake or flue gas

discharge Check air/flue gas ducts : unclog

or replace as needed Fan is faulty Replace it

The boiler has shut down and red light no. 4 is flashing

Flue pressure switch is not operating

The el ectronic board is faulty Replace it

CH water does not flow: pipes might be clogged, ther mostatic val ves might be shut, sys tem stopcocks might be closed

Check CH system The boiler has shut down and red light no. 3 is flashing.

Boiler safety ther mostat has shut boiler down

Pump is faulty Replace it Possible water leaks Check system for leaks

Pressure switch is disconnected Reconnect it The boiler has shut down and

red light no. 6 is flashing. Insufficient water pressure

Water pressure switch is faulty Replace it

The boiler has shut down, red light no. 2 and green light no. 8 are flashing intermittently.

CH probe is not operati ve CH probe is disconnec ted or faulty

Reconnect or repl ace it

The boiler has shut down and red light no. 2 is flashing.

DHW probe is not operati ve DHW probe is disconnected or

faulty Reconnect or repl ace it

Check DHW system Sys tem insufficient pressure or capacity Check DHW fl ow metre filter Boiler is not providing DHW DHW flow metre is not operati ve

Flow metr e sensor is disconnected or faulty Reconnect or repl ace it

Documents

Didactic manual Nias-Libra Dual AST 14 C152-00...NIAS DUAL BTFS ENCASED Instantaneous boiler, elevated DHW production with 25 litre water tank, excludable by the user. Fondital version