Wall-hung gas fired premix condensing boilers for heating only or with domestic hot water production

ECONCEPT 15 - 25 - 35

2

ECONCEPT 15 - 25 - 35 introduction

ECONCEPT is a wall-hung premix condensing heat generator for central heating and the production of domestic hotwater (version C), with very high thermal efficiency and very low emissions, fired by natural gas or LPG (using the spe-cial conversion kit).

The ECONCEPT series is the result of FERROLI Research and Development, based on experience in foreigncountries, above all central-northern Europe, which are traditionally more sensitive to issues of environmental conser-vation and the reduction of pollution.

ECONCEPT version C

Version CWall-hung gas fired premix condensing boiler for cen-tral heating and the production of domestic hot waterusing a secondary steel plate exchanger with micro-storage in the primary circuit.

ECONCEPT 25CHeat input from 7.5 to 25.2 kWDHW production 10.3 l/min at ∆t 35°C

ECONCEPT 35CHeat input from 10.4 to 34.8 kW(with modulating central heating pump)DHW production 14.2 l/min at ∆t 35°C

ECONCEPT version A

Version AWall-hung gas fired premix condensing boiler for centralheating and ready for connection to a storage heater forthe production of domestic hot water.

ECONCEPT 15AHeat input from 3.6 to 15.3 kW

ECONCEPT 25AHeat input from 7.5 to 25.2 kW

ECONCEPT 35AHeat input from 10.4 to 34.8 kW(with modulating central heating pump)

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ECONCEPT 15 - 25 - 35 technology

CONDENSATIONThe ECONCEPT series of generators are designed toexploit condensation technology.Using a special aluminium condenser, the boiler is able torecover part of the energy that would otherwise be disper-sed in the atmosphere by the flue gas, transferring it to thesystem and consequently allowing very high efficiency.

PREMIXINGThe ECONCEPT series of generators are complete pre-mix appliances. This means that the right quantity of air for combustion issupplied in all operating conditions.This system ensures high and constant efficiency (h) forall power outputs of the boiler, and furthermore createsa flame with very low polluting emissions.

Even when the ECONCEPT operates at reduced loads, the efficiency of combustion may reach 109%.

PmaxPmin

ηECONCEPT series

ηηminmin

ηmaxtraditional

ηmaxEconcept

Traditio

nal room-sealed

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The ECONCEPT series has gainedapproval as class 5 according to the

UNI EN 297 standard, that is, the lowestpollution rating envisaged by the

European technical standards.

VARIABLE-SPEED PUMPVersions 35C and 35A are fitted with a modulatingpump at fixed ∆t even with systems featuring variablepressure drop (multi-zone systems), ensuring betterperformance and ambient comfort.

Q [l/h]

H [m

H2O

]

Pump field of modulation

Boiler field of modulation

WATER VAPOURCONDENSATE

ENERGYSUPPLIEDBY THEGAS FUEL

P.C.S.P.C.I.

LOSSES THROUGHTHE CASING

LOSSES THROUGHTHE STACK

USEFULENERGY

SUPPLIED TOTHE SYSTEM

109%

4

componentsECONCEPT 15 - 25 - 35

The boiler body is made up of an aluminium heat exchanger,in which the system water passes the flame eleven times. The exchanger has no braze-welded joints, and the mecha-nical seal is guaranteed by the flaring process, which ensu-res high mechanical resistance over time and low noiseduring operation.

Combustion with reverse flame is guaranteed by the cera-mic “premix” burner with a large surface area, able tocreate a “mat” of micro-flames that allows extremely redu-ced emissions (class 5, according to the UNI EN 297 stan-dard) , and at the same time guaranteeing high reliabilityand constant operation over time.

DHW micro-storage

MICRO-STORAGEIn order to achieve maximum comfort in the delivery ofinstant domestic hot water, a 4 litre micro-storage systemhas been adopted, which stabilises the operating temperatu-re and minimises waiting times.The “micro storage system” can be deactivated by simply pres-sing the “ECO” button on the boiler control panel.

Premix assembly

Exchanger

5

ECONCEPT 15 - 25 - 35 control panel

The boiler’s microprocessor control system ensures the ECONCEPT a rapid response tothe commands and precise control of the data and the desired temperature.The user interface is easy to use and provides, on the large display, constant informationon the operating status of the appliance.The operating parameters and the logged data are saved internally and can be cal-led by a connection to a Personal Computer, to assist the service operations.

The ECONCEPT series can be operated using a modulating remote control-timer, whichcan be used to manage the boiler and program the heating functions on a daily or weeklybasis to three distinct temperature values.The remote control-timer is modulating, that is, modifies the boiler outlet temperature inde-pendently of the set value, based on the room temperature: this ensures optimum mana-gement of the comfort conditions and a faster and more precise achieve-ment of the thermal load required.The microprocessor on the appliance is alsoable to calculate a pre-ignition period (evenwhen the climatic conditions change), so as tobring the environment to the set temperatureat the desired time.By connecting the remote control-timer to anEconcept version A generator, fitted with storageheater, the production of domestic hot water canbe programmed on a weekly basis.

Modify selectedparameters

Selectparameters

Domestic hot watersetting (30°-65°C)

Boiler on/off

Winter/Summerselection

COMFORT/ECOselection

System temperaturesetting (30°-85°C)

Reset boiler

Display board

“Romeo”remote control-timer

22

20

18

Roo

m te

mpe

ratu

re °

C

With non modulating room thermostat

With ROMEO remote control-timer

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configurationsECONCEPT 15 - 25 - 35

WITH OUTSIDE PROBE AND TEMPERATURE SCROLLING:The electronic board is fitted for the connection of an outsideprobe and consequently for temperature scrolling operation.This special function ensures that the boiler adjusts the systemoutlet temperature according to the outside temperature, so asto guarantee significant energy savings and bettercomfort control.The electronics on the ECONCEPT are able to managethe shift in the curves so as to adapt to various differentsystem solutions with different operating temperatures.

WITH EXTERNAL STORAGE HEATERThe ECONCEPT 15A - 25A - 35A models are fitted forthe management of an external storage heater, using aspecial kit (optional*), installed inside the casing, made up ofa fill pump, non-return valve and storage heater probe; theelectronic board can automatically manage the production ofdomestic hot water in priority.

Outside probe

* Storage kit made up of: pump - outlet pipe - return pipe - non-return valve - water storage temperature probe

EXAMPLE OF SHIFTS IN THE CURVES

Sys

tem

ou

tlet

tem

per

atu

re °

C

Outside temperature °C

Sys

tem

ou

tlet

tem

per

atu

re °

C

Outside temperature °C

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ECONCEPT 15 - 25 - 35 functional diagrams

Key7 Gas inlet8 Domestic hot water outlet8A Storage heater coil outlet (optional)9 Domestic water inlet9A Storage heater coil inlet (optional)

10 Central heating outlet11 Central heating return14 Central heating safety valve16 Fan32 Central heating pump (modulating on model 35)34 Central heating temperature sensor35 Air separator36 Automatic air vent42 DHW temperature sensor44 Gas valve49 Safety thermostat56 Expansion vessel74 Fill cock

130 DHW pump (optional version A)136 Flow sensor145 Pressure gauge154 Condensate drain tube161 Heat exchanger179 Non-return valve186 Return sensor194 DHW exchanger195 Micro-storage201 Mixing chamber246 Pressure transducer

Version C

Version A

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dimensionsECONCEPT 15 - 25 - 35

BOTTOM VIEWVERSION A

KEY1 Central heating flow outlet ø 3/4”2 Domestic hot water outlet ø 1/2”3 Gas inlet ø 1/2”

4 Domestic water inlet ø 1/2”5 Central heating return inlet ø 3/4”6 Fill cock7 System fill

480 36778

0

TOP VIEWECONCEPT 15 - 25 (A - C)

TOP VIEWECONCEPT 35 (A - C)

BOTTOM VIEW VERSIONE C

DIMENSION AND FITTINGS

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ECONCEPT 15 - 25 - 35 technical specifications

ECONCEPT 15A 25A 35A 25C 35C

Heat input (Hi) P max kW 15,3 25,2 34,8 25,2 34,8P min kW 3,6 7,5 10,4, 7,5 10,4

Useful heat output 80°C - 60°C P max kW 15,0 24,7 34,6 24,7 34,6P min kW 3,5 7,3 10,2 7,3 10,2

Useful heat output 50°C - 30°C P max kW 16,2 26,4 36,4 26,4 36,4P min kW 3,8 8,0 11,1 8,0 11,1

Useful efficiency 80°C - 60°C P max % 98,1 98,1 99,5 98,1 99,5P min % 97,5 97,5 97,8 97,5 97,8

Useful efficiency 50°C - 30°C P max % 104,9 104,9 104,7 104,9 104,7P min % 106,7 106,7 107,1 106,7 107,1

Useful efficiency at reduced load 30% P max % 109,3 109,3 109,1 109,3 109,1Energy marking (EC directive 92/42) ★★★★ ★★★★ ★★★★ ★★★★ ★★★★

Flue gas temperature 80°C - 60°C P max °C 61 65 65 65 65P min °C 60 60 60 60 60

Flue gas temperature 50°C - 30°C P max °C 36 43 45 43 45P min °C 30 31 31 31 31

Flue gas flow-rate P max kg/h 25 43 57 43 57P min kg/h 5,9 13 17,5 13 17,5

CO2 Natural gas (G20) P max % 9,0 9,0 9,0 9,0 9,0CO2 Propane (G31) P max % 10,0 10,0 10,0 10,0 10,0CO2 Butane (G30) P max % 10,9 10,9 10,9 10,9 10,9Class of NOx emissions (UNI EN 297 standard) 5 5 5 5 5Field of central heating temperature setting °C 20-90 20-90 20-90 20-90 20-90Min/max operating pressure bar 0,8-3 0,8-3 0,8-3 0,8-3 0,8-3Total boiler water content litres 1,7 1,7 2,0 5,5 6,0Expansion vessel capacity litres 10 10 10 10 10Expansion vessel pre-charge pressure bar 1,0 1,0 1,0 1,0 1,0Field of DHW temperature setting °C — — — 40-65 40-65Min/maw DHW operating pressure bar — — — 0,25-10 0,25-10Domestic hot water production ∆t 25°C litres/min — — — 14,2 19,8

∆t 30°C litres/min — — — 11,8 16,5∆t 35°C litres/min — — — 10,1 14,2

Max power input W 140 140 150 140 150Pump power input Speed I W 45 45 — 45 —

Speed II W 67 67 — 67 —Speed III W 83 83 — 83 —Modulating W — — 93 — 93

Power supply/Frequency V / Hz 230/50 230/50 230/50 230/50 230/50Boiler weight when empty kg 50 50 55 56,5 55Gas fittings inches 1/2” 1/2” 1/2” 1/2" 1/2"Central heating system fittings inches 3/4” 3/4” 3/4” 3/4" 3/4"DHW circuit fittings inches 1/2” 1/2” 1/2” 1/2" 1/2"

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technical specificationsECONCEPT 15 - 25 - 35

PUMP PRESSURE DROP/HEAD

ECONCEPT 35 A - 35 C

ECONCEPT 15A - 25 A - 25 C

KEYPump speedBoiler pressure drop

1 2 3

A

KEYPump min speedPump max speedBoiler pressure drop

1

3

A

CIRCOLATORE MODULANTE

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ECONCEPT 15 - 25 - 35 flues

EQUIVALENT FLUE LENGTHS

ø 80 mm ø 60/100 mm ø 80/125 mm(air + flue gas) Horizontal Vertical Horizontal Vertical

ECONCEPT 15A 75 metres 4 metres 5 metres 12 metres 12 metres

ECONCEPT 25A 75 metres 4 metres 5 metres 12 metres 12 metres

ECONCEPT 35A 55 metres 5 metres 6 metres 12 metres 12 metres

ECONCEPT 25C 75 metres 4 metres 5 metres 12 metres 12 metres

ECONCEPT 35C 55 metres 5 metres 6 metres 12 metres 12 metres

The lengths of the pipes are expressed in equivalent metres

SEPARATE PIPES COAXIAL PIPES

EXAMPLES OF CONNECTION WITH COAXIAL PIPESThe ECONCEPT series boilers are “type C” room-sea-led, forced draught appliances. The air inlet and flue gasoutlet must be connected to pipes according to the stan-dards and local regulations in force.

The “air/flue gas” chamber in the boilers has been desi-gned in such a way as to allow two different types of fluegas outlet and combustion air intake:- With coaxial pipe, diameter 60/100mm or 80/125mm.- With separate pipes, diameter 80mm.

90° coaxial bend, 360°revolving with 45°step, ø 100/60mm,with flange, PVC outsi-de, aluminium inside

Fitting for coaxialpipe ø 80/125mm

Fitting for verticalcoaxial pipe, ø 100/60 mm

Separate pipe kit, ø 80/80

EXAMPLES OF CONNECTION WITH SEPARATE PIPES

Complete flue gasoutlet kit with separatepipes, dia. 80 horizon-tal made from PPS,with 2 x 90° bends, 2extensions (L=1000mm), 4 gaskets, wind-protection terminals

Ferroli spa ¬ 37047 San Bonifacio (Verona) Italy ¬ Via Ritonda 78/A tel. +39.045.6139411 ¬ fax +39.045.6100233 www.gruppoferroli.com ¬ e-mail: export@ferroli.it

Cod.

89B

1159

1 -

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WARNING FOR TRADERS: As part of its efforts to constantly improve itsrange of products, with the aim of increasing the level of Customer satisfac-tion, the Company stresses that the appearance, dimensions, technical dataand accessories may be subject to variation. Consequently, ensure that theCustomer is provided with updated documents. The products described inthis document are covered by warranty if purchased and installed in Italy.