ARCA PIXEL 25 N Instruction Manual

INSTRUCTIONS MANUAL To be used for INSTALLATION, USE AND MAINTENANCE PIXEL 25 N PIXEL 25 NR PIXEL 29 F PIXEL 29 FR PIXEL 25 F PIXEL 25 FR PIXEL IN 25 F PIXEL IN 25 FR PIXEL ES 25 F PIXEL ES 25 FR IMPORTANT The first boiler ignition and the warranty have to be carried out by an authorised personnel LIB0900P – Rev. 1 - 21/02/2006 - 28 pagine

Read carefully the information about safety, installation and maintenance that are shown in it. The heater installation is to be carried out by qualified personnel according to the present law and the producer instructions. After having removed the packaging it is better to control the good state of the product. Don't use the heater if you have any doubt about this just call your supplier. IMPORTANT: this heater is aimed to warm water at an inferior temperature than that of the boiling at an atmospheric pressure; it has to be linked to an heating system and/or a hot water distribution net proper to its capacity and power. This heater has to be used only according to the usage it was planned for. Every kind of other usage has to be considered unproper and dangerous. The producer is not to be considered responsible for possible damages caused by this wrong, unproper and unreasonable usage. Cut the heater from its supply net off before doing every kind of service operations. Don't obstruct heater aspiration or dissipation grills. Put the heater out of work if there is any damage or misfunctioning. The repairing must be carried out by an authorized service operation centre and it has to use only original spare parts. In order to grant the highest heater efficiency and for its good functioning it is indispensable to follow the producer instructions. If you decide not to use the heater any more make all the dangerous parts became harmless. Don't wet the heater neither with water nor with other liquid substances. Don't put other items on the surface of the heater. Before starting every kind of service operation which forsees the burner dismantling or the opening of inspection holes you have to cut off the electrical supply and close gas cocks. If there are chimney service operations turn the heater off. After having finished the operation you should call your qualified personnel and make the relief duct efficiency control. Don't clean the heater with inflammable substances. Don't leave recipients of inflammable substances near the heater. The electrical safety of the heater is assured only if it is linked to an ground system which is respectful of present laws. Your qualified personnel must control the efficiency of your net because if there are any problems the producer is not responsable for damages caused by the lacking of a proper ground system. Control your electrical system capacity which is to be proper to the power required by your heater. As far as the heater supply is concerned you cannot use adaptators, multiple plugs and extensions. The use of electrical items implies the careful observation of fundamental rules such as: 1 do not touch the heater with wet hands; 2 do not tear electrical cables; 3 give not allow children or unused persons to use the heater. All the following instructions that macaws to be take in mind by the technician on the products of the firm ARCA S.r.l. The ordinary maintenance and the possible reparation of the products must have nade by a center assistance authorized from the ARCA S.r.l., exclusively using original pspare parts.. Use only flue gas ducts and electric accessories and furnished by ARCA S.r.l. Do not replace the supply pipe by your own but only by a qualified person. You have to assure that safety discharge tubes are linked to a relief valve. Otherwise, there can be an overfload of the heater site caused by the valves safety action and therefore the producer is not responsible. System pipes have not to be used as ground plugs for other systems; not only are they unproper to this use but they can cause serious problems to the appliances which are linked to them. Please control: 1 the good functioning of the gas inlet system; 2 the correct gas capacity is the one required by the heater power; 3 that the type of gas used is that the heater was projected for. 4 that the gas supply pressure is within the required values of the heater. 5 that the gas inlet system is proper and has all the required safety caracteristics which are forseen by law. If you feel gas odour do not turn electrical switches on just open your windows and close gas cocks. 2

1. TECHNICAL DATA ------------------------------------------------------------------------------------- 4 1.1 Dimensions ------------------------------------------------------------------------------------------------------------------------------------- 4 1.2 Hydraulic scheme----------------------------------------------------------------------------------------------------------------------------- 4 1.3 Available head --------------------------------------------------------------------------------------------------------------------------------- 4 1.4 General layout of the main components of models PIXEL 25 N ------------------------------------------------------------------ 5 1.5 General layout of the main components of models PIXEL 25 F, PIXEL ES 25, PIXEL IN 25 F -------------------------- 6 1.6 General layout of the main components of models PIXEL 29 F ------------------------------------------------------------------ 7 1.7 Technical data --------------------------------------------------------------------------------------------------------------------------------- 8 1.8 Electrical scheme of PIXEL 25 N --------------------------------------------------------------------------------------------------------- 9 1.9 Electrical scheme of PIXEL 25 NR ------------------------------------------------------------------------------------------------------- 10 1.10 Electrical scheme of PIXEL 25 F, PIXEL ES 25 F, PIXEL IN 25 F, PIXEL 29 F -------------------------------------------- 11 1.12 Electrical scheme of PIXEL 25 FR, PIXEL ES 25 FR, PIXEL IN 25 FR, PIXEL 29 FR------------------------------------ 12 2. INSTALLATION INSTRUCTIONS ------------------------------------------------------------------- 13 2.1 Combustion product discharge: PIXEL 25 F, PIXEL ES 25 F, PIXEL IN 25 F, PIXEL 29 F ------------------------------- 13 2.1.1 Different venting options - Flue venting --------------------------------------------------------------------------------------- 13 2.1.2 Lenght of discharge ducts: PIXEL 25 F, PIXEL ES 25 F, PIXEL IN 25 F --------------------------------------------- 14 2.1.2.1 Split flue (Ø 80 mm) -------------------------------------------------------------------------------------------------- 14 2.1.2.2 Coaxial flue (Ø 60 x 100 mm)-------------------------------------------------------------------------------------- 14 2.1.3 Lenght of discharge ducts: PIXEL 29 F---------------------------------------------------------------------------------------- 15 2.1.3.1 Split flue (Ø 80 mm) -------------------------------------------------------------------------------------------------- 15 2.1.3.2 Coaxial flue (Ø 60 x 100 mm)-------------------------------------------------------------------------------------- 15 2.2 Combustion product discharge: PIXEL 25 N ----------------------------------------------------------------------------------------- 16 2.2.1 Connection with a cheminey ----------------------------------------------------------------------------------------------------- 16 2.2.2 Outdoor direct discarge ------------------------------------------------------------------------------------------------------------ 16 2.2.3 Venting of the rooms --------------------------------------------------------------------------------------------------------------- 17 2.3 Boiler placing----------------------------------------------------------------------------------------------------------------------------------- 17 2.4 Hydraulic connections ----------------------------------------------------------------------------------------------------------------------- 18 2.5 Electric connections -------------------------------------------------------------------------------------------------------------------------- 18 2.6 Gas connection-------------------------------------------------------------------------------------------------------------------------------- 19 2.7 Setting of control panel ---------------------------------------------------------------------------------------------------------------------- 20 2.8 Adjustement instructions: nominal heat and minimal heat-------------------------------------------------------------------------- 21 2.8.1 Nominal heat adjustment ---------------------------------------------------------------------------------------------------------- 21 2.8.2 Minimal heat adjustment ----------------------------------------------------------------------------------------------------------- 21 2.9 Slow ignition and nominal heat adjustment--------------------------------------------------------------------------------------------- 21 2.9.1 Slow ignition adjustment----------------------------------------------------------------------------------------------------------- 21 2.9.2 Nominal heat adjustment ---------------------------------------------------------------------------------------------------------- 22 2.10 Different gases------------------------------------------------------------------------------------------------------------------------------- 22 2.11 Injectors - pressure table: PIXEL 25 N------------------------------------------------------------------------------------------------- 22 2.11.1 Gas pressure - Heat diagram---------------------------------------------------------------------------------------------------- 22 2.12 Injectors - pressure table: PIXEL 25 F, PIXEL ES 25 F, PIXEL IN 25 F ------------------------------------------------------ 23 2.12.1 Gas pressure - Heat diagram---------------------------------------------------------------------------------------------------- 23 2.13 Injectors - pressure table: PIXEL 29 F ------------------------------------------------------------------------------------------------- 24 2.13.1 Gas pressure - Heat diagram---------------------------------------------------------------------------------------------------- 24 3. MAINTENANCE INSTRUCTIONS------------------------------------------------------------------- 25 3.1 Introduction ------------------------------------------------------------------------------------------------------------------------------------- 25 3.2 Circulation deblocking ----------------------------------------------------------------------------------------------------------------------- 25 4. USER'S INSTRUCTIONS------------------------------------------------------------------------------ 26 4.1 Control panel----------------------------------------------------------------------------------------------------------------------------------- 26 4.2 Ignition ------------------------------------------------------------------------------------------------------------------------------------------- 27 4.3 Summer functioning -------------------------------------------------------------------------------------------------------------------------- 27 4.4 Winter functioning----------------------------------------------------------------------------------------------------------------------------- 27 4.5 Break down signals--------------------------------------------------------------------------------------------------------------------------- 27 4.6 Temporary shut down------------------------------------------------------------------------------------------------------------------------ 27 4.7 Long term shut downi ------------------------------------------------------------------------------------------------------------------------ 27 4.8 Suggestions ------------------------------------------------------------------------------------------------------------------------------------ 27 4.9 Functioning problems ------------------------------------------------------------------------------------------------------------------------ 28 Declaration of conformity ------------------------------------------------------------------------------------------------------------------------- 29 3

1.1 DIMENSIONS BOILER L (mm) H (mm) P (mm) A (mm) B (mm) C (mm) D (mm) PIXEL 25 N 400 720 300 200 200 182 118 PIXEL 25 F 400 650 260 235 165 103 157 PIXEL 29 F 400 720 300 200 200 182 118 1.2 HYDRAULIC SCHEME 1 - gas valve 2 - burner 3 - primary exchanger 4 - circulator 5 - flussostat 6 - bypass supply 7 - manometer 8 - safety valve (set to 3 bar) 9 - filter 10 - valve of charging supply 11 - vase of expansion 12 - valve in three streets flussostatica 13 - valve I discharging air 14 - sanitary exchanger 1.3 AVAILABLE HEAD 4 0 0 ,5 1 1 ,5 2 2 ,5 3 3 ,5 4 4 ,5 5 5 ,5 6 6 ,5 F lo w (l/h ) Available head H (m) P IX E L 2 5 N , F w ith o u t b y-p a s s P IX E L 2 5 N , F w ith b y-p a s s P IX E L 2 9 F w ith o u t b y-p a s s P IX E L 2 9 F w ith b y- p a s s L A B H P C D 4 11 7 6 13 14 12 9 5 6 10 1 2 3 HOT DOMESTICAL WATER COLD DOMESTICAL WATER RETURN SUPPLY GAS

PIXEL 25 N 1. Flue gas thermostat 2. Discharge air valve 3. Limit thermostat (105°C) 4. Copper Primary Exchanger 5. Electrode of lighting and survey 6. Burner 7. Circulator 8. Gas valve 9. Safety valve (3 bar) 10. Supply charge valve 11. Supply descharge valve 12. DHW exchanger 13. Supply sensor 14. Hydraulic valve 15. Flue gas cap 16. DHW sensor 5 1 2 3 4 13 6 7 8 9 10 14 15 5 12 11 16

PIXEL 25 F, PIXEL ES 25 F, PIXEL IN 25 F 1. Air Pressostat 2. Discharge air valve 3. Limit thermostat (105°C) 4. Copper Primary Exchanger 5. Electrode of lighting and survey 6. Burner 7. Circulator 8. Gas valve 9. Safety valve (3 bar) 10. Supply charge valve 11. Sanitary water exchanger 12. Supply sensor 13. Hydraulic valve 14. Proof chamber 15. Fan 6 1 2 12 3 4 5 6 7 8 9 11 13 15 14 10

PIXEL 29 F 1 Air Pressostat 2 Discharge air valve 3 Limit thermostat (105°C) 4 Copper Primary Exchanger 5 Electrode of lighting and survey 6 Burner 7 Circulator 8 Gas valve 9 Valvola di sicurezza (3 bar) 10 Supply charge valve 11 Supply descharge valve 12 Sanitary water exchanger 13 Sonda riscaldamento 14 Hydraulic valve 15 Proof chamber 16 Fan 7 1 2 3 13 6 5 4 7 8 10 14 11 9 12 15 16

Size PIXEL 25 N PIXEL 25 F, ES 25 F, IN 25 F PIXEL 29 F Type B11BS C12-C32-C42-C52 C12-C32-C42-C52 Nominal Heat KW 27 27 31,5 Nominal Heat Kcal/h 23220 23220 27090 Useful Heat KW 24,7 25,1 29,3 Useful Heat Kcal/h 21200 21734 25194 Efficiency % 91,3 92,9 93 Minimal Heat KW 10,5 10,5 12,4 Minimal Useful Heat KW 9,4 9,5 11,3 Efficiency at 30 % of Nominal Heat % 89,5 90,7 91,2 Nominal Heat Gas Flow Metano G20 (2E+) m3/h 2,855 2,855 3,331 Metano G25 (2ELL) m3/h 3,320 3,320 3,874 GPL G30 (3+) kg/h 2,128 2,128 2,482 GPL G31 (3P) kg/h 2,096 2,096 2,445 Inlet pressure Metano G20 (2E+) mbar 20/25 20/25 20/25 Metano G25 (2ELL) mbar 20 20 20 GPL G30 (3+) mbar 29 29 29 GPL G31 (3P) mbar 37 37 37 Flue gas temperature °C 115,3 126,7 131,4 CO2 (G20) % 6 7,7 7,6 Pondered NOx (according to EN 483 pars 6.2.2) mg/KWh ---- 119 (classe 3) ---- Losses of heat to the cover with burner ignited % 6,8 6,6 6,5 Losses of heat to the cover with burnernot ignited % 0,2 0,2 0,1 Losses of heat to the cover ((T = 50 °Cs) % 1,9 0,3 0,5 Gas flow rate Nm3/h 58,7 47,0 55,5 CENTRAL HEATING C.H. Minimum Set point °C 35 35 35 C.H. Maximum Set point °C 90 90 90 Volume of water in the boiler l 1,2 1,2 1,2 Volume of water of the expansion vessel l 7,5 7,5 7,5 Pressure of the expansion vessel bar 0,7 0,7 0,7 Least pressure in the primary circuit bar 0,4 0,4 0,4 Maximum pressure in the primary circuit bar 3 3 3 Maximum content of heating water l 150 150 150 Available head at 1000 l/h of flow rate mbar 230 230 330 Domestical hot water Minimum set point °C 30 30 30 Maximum set point °C 60 60 60 Production continuous warm water (t = 25 °C) l/min 14,1 14,4 16,8 Production continuous warm water (t = 35 °C) l/min 10,1 10,3 12,0 Volume water (t = 30 °C in the first 10 minutes) l 117,8 120 140 Minimum flow l/min 2,5 2,5 2,5 Maximum pressure bar 8 8 8 Minimum pressure bar 0,5 0,5 0,5 Voltage l ---- ---- ---- Frequency V/Hz 230/50 230/50 230/50 Absorbed eletric power W 90 120 120 CONNECTIONS Heating Inch 3/4" 3/4" 3/4" Sanitary water Inch 1/2" 1/2" 1/2" Gas Inch 1/2" 3/4" 3/4" Height mm 720 650 720 Depth mm 300 260 300 Width mm 400 400 400 Lenght of flue gas ducts Coaxial Ø 60 xes 100 mms m 3 4 4 Doubled Ø 80 mms m 16 30 30 Doubled Ø 60 mms m ---- ---- ---- Weight Kg 43 40 43 Degree of protection IP 44 IP4X 44 Homologation CE 0068 0068 0068 8

9 PHASE NEUTRAL GROUND FUSE: 2 x 3,15 AF 5x20 - 250 V PUMP GAS VALVE N L SUPPLY SENSOR ROSSO ROSSO P1 P3 P2 PRESSURE TRANSDUCTOR OF HEATING SYSTEM AMBIENT THERMOSTAT / REMOTE CONTROL (OPTIONAL) SUPPLY WATER SAFETY BLOCK FLUE GAS THERMOSTAT GAS VALVE MODULATO ELECTRODE OF LIGHT AND SURVEY EXTERNAL SENSOR (OPTIONAL) C N.O. DHW micro switch DHW SENSOR (optional)

10 SAN. RISC. 3 WAYS VALVE (OPZIONALE) EXTERNAL SENSOR (OPTIONAL) ELECTRODE OF LIGHTING AND SURVEY GAS VALVE MODULATOR FLUE GAS THERMOSTAT SUPPLY WATER SAFETY BLOCK AMBIENT THERMOSTAT / REMOTE CONTROL (OPTIONAL) PRESSURE TRANSDUCTOR OF HEATING SYSTEM P2 P3 P1 ROSSO ROSSO SUPPLY SENSOR DHW SENSOR (OPTIONAL) L N GAS VALVE BLU MARRONE PUMP FUSE: 2 x 3,15 AF 5x20 - 250 V GROUND NEUTRAL PHASE

PIXEL IN 25 F, PIXEL 29 F 11 EXTERNAL SENSOR ELETTRODE OF LIGHTING AND SURVEY GAS VALVE MODULATOR 1 3 AIR PRESSOSTAT SAFETY THERMOSTAT (105°C) AMBIENT THERMOSTAT/REMOTE CONTROL (OPTIONAL) TRANSDUCER OF PRESSURE OF HEATING SYSTEM P2 P3 P1 DHW MICRO SWITCH SUPPLY SENSOR SONDA SANITARIO C N.O. L N GAS VALVE FAN PUMP FUSE: 2 x 3,15 AF 5x20 - 250 V GROUND NEUTRAL PHASE

PIXEL IN 25 FR, PIXEL 29 FR 12 DHW HEATING SYSTEM 3 WAYS VALVE EXTERNAL SENSOR ELECTRODE OF LIGHTING AND SURVEY GAS VALVE MODULATOR 1 3 AIR PRESSOSTAT TERMOSTATO LIMITE TEMPERATURA ACQUA AMBIENT THERMOSTAT/ REMOTE CONTROL (OPTIONAL) TRANSDUCER OF PRESSURE OF HEATING SYSTEM P2 P3 P1 SUPPLY SENSOR DHW SENSOR (OPTIONAL) L N GAS VALVE FAN PUMP FUSE: 2 x 3,15 AF 5x20 - 250 V GROUND NEUTRAL PHASE

2.1 DIFFERENT VENTING OPTIONS: PIXEL 25 F, PIXEL ES 25 F, PIXEL IN 25 F, PIXEL 29 F Proof chamber heaters do not require particular caracteristics as for siting and installation are concerned. Take particular attention to discharge and aspiration unions in order to avoid combustion product leakage. Use only original spare parts. 2.1.1 Different venting options - Flue Venting 1. Coaxial vent through the roof 2. Coaxial through the wall 3. Split type venting between two cheminey 4. Split type, discharge into a cheminey, fresh air from outdoor wall 5. Coaxial, connection with coaxial cheminey CAUTION! - Follow local regulations concerning draught terminals location from windows and doors. 13

PIXEL 25 F, PIXEL ES 25 F, PIXEL IN 25 F 2.1.2.1 SPLIT FLUE Ø 80 mm N.B.: The flue and aspiration duct lenght has not to exceed 16 m. For every added 90° elbow the maximum allovable lenght is to be diminuished by 2 m. Horizontal aspiration and discharge duct are to be placed slightly inclined towards the outside. 2.1.3.2 COAXIAL FLUE Ø 60 x 100 mm N.B.: The allowed lenght of coaxial ducts varies between to 0,5 ms minimal lenght and to 4 ms maximal lenght. By 0 to 1 meters length the presence is necessary of a diaphragm Ø 44 in the outlet of the fan. By 2 to 3 meters length the presence is necessary of a diaphragm Ø 46 in the outlet of the fan. Horizontal aspiration and discharge duct are to be placed slightly inclined towards the outside. 14 MAX 15 m MAX 15 m + 105 120 175 400 235 650 165 STRAGHT ON 400 650 235 165 MAX 15 m 103 157 260 MAX 4 m 235 165 100 400 650 MAX 4 m

2.1.3.1 SPLIT FLUE Ø 80 mm N.B.: The flue and aspiration duct lenght has not to exceed 30 m. For every added 90° elbow the maximum allovable lenght is to be diminuished by 2 m. By 0 to 4 m of lenght you must insert in the outlet of the fan a Ø 44 mm diaphragm. By 5 to 15 m of lenght you must insert in the outlett of the fan a Ø 44 mm diaphragm. The pipe of aspiration and flue gas must be climbed on with light inclination toward the outside. 2.1.3.2 COAXIAL FLUE Ø 60 x 100 mm N.B.: The allowed lenght of coaxial ducts varies between to 0,5 ms minimal lenght and to 4 ms maximal lenght. By 0 to 1 meters length the presence is necessary of a diaphragm Ø 44 in the outlet of the fan. By 2 to 3 meters length the presence is necessary of a diaphragm Ø 46 in the outlet of the fan. Horizontal aspiration and discharge duct are to be placed slightly inclined towards the outside. 15 IN LINEA RETTA MAX 15 m MAX 15 m + 105 120 175 235 165 MAX 15 m 235 165 MAX 4 m 100 235 165 103 157 260 MAX 4 m

2.2.1 CONNECTION WITH A CHEMINEY The cheminey has a grat importance for thewell running of the boiler; It must be done according these requests: • Must be built with a resistant water material and must be resistant • must be in material impermeable and resistant to the temperature of the smokes and to their condensation; • must have a sufficient mechanical resistance and a weak [conduttività termica]; • must be perfectly proof; • must have a most possible vertical and straight course and the terminal part must be equipped with a static aspirator that assures an efficient and constant evacuation of the smokes; • for avoid that the wind could create around the chimney pot of the zones of such pressure from prevail on the ascensional strength of the gases of unloaded it is necessary that the orifice of evacuation overhangs of at least 0,4 mt. any adjacent to structure the same fireplace (inclusive the height of the roof of the building) if distant less of 8mt.; • the cheminey must have a diameter not inferior to that of cloack of the boiler to square or rectangular section the inside section must be plus then 10% as regards that of exit of the same cloak; • beginning from the cloak, the link must have a vertical pull of length not inferior to two turned the diameter before the cheminey 2.2.2 OUTDOOR DIRECT DISCHARGE The natural draught boilers could unload the smokes directly to the outside through the building wall ; a terminal of draught to the extremity of the duct must be applied. The duct must satisfy the followings requisite: • the horizontal inside part to the building must be reduced to the minimum ([1mt.) and have an inclination in equal slope at 3 o'clock% toward the outside; • must not have more than two changes of direction; • must receive the unloading of an only apparatus; • must be protected; • the pull external ending before the terminal of draught must stick out from the wall of at least two diameters; • the vertical leaving pull from the cloak must be along at least a meter; • the terminal of draught must overhang of at least 1,5mt. the attack of the duct on the cloak of the boiler. la parte orizzontale interna all’edificio deve essere ridotta al minimo (max. 1mt.) ed avere un’inclinazione 2.2.3 VENTING OF THE ROOMS The natural draught boilers are of open combustion to room and are scheduled for have laced the cheminey: the combustive air has withdrawn directly from the environment in which the boiler is installed. The rooms in which the boiler is placed will be able to have a ventilation of direct type (with taking of air in the same place where the boiler is installed), or have an indirect ventilation (with taking of air in the adjoining places) provided that they come respect the conditions under suitable: DIRECT AIRING • the place must have an opening of equal airing to 6 cm² for each installed [kW] and in all the cases never inferior to 100cm², practiced directly on the wall toward the outside; • the opening must be nearest possible to the floor; 16 PIXEL 25 N 300 Ø 130

the flow rate of the air; that's why motive to the section of the hole is added the section of the closed part of the grate; • a correct airing could also be gotten through the add openings more, provided that the adds of the varied sections it correspond to the necessary one; • if iss not possible practise the near opening to the floor, it is necessary increase the section of the same at least of the 50%; • the presence of a fireplace in the same place requires a feeding of own air, otherwise the installation of apparatuses of B type has not allowed; • if in the place there is other apparatuses that require of air for their operation (for instance cloaks or aspirators), the section of the opening of airing goes calculated adequately. INDIRECT AIRING It in the case is not possible effect the airing directly in the place, he/she/it/you could be applied the ventilation indi-straight line, withdrawing the air from an adjoining place through an adequate opening practised in the low part of the door. This solution is however only possible if: · the adjoining place is endowed with direct adequate ventilation; · the adjoining place is not [adibito] to bedroom; · the adjoining place is not a common part of the immovable property and is not an environment with danger of fire (for instance deposits of inflammable substances, garage, etc.). N.B.: In case of an insufficient ventilation of the place or of an incorrect evacuation of the smokes, flue gas thermostat provokes a lockout of the boiler. For unblocking is necessary regulate the selector in position of reset. 2.3 BOILER PLACING Follow these instructions: • having considered the boiler dimensions, fix the dimension plate by means of two hook screws; • make two holes on the dimension plate holes by means of two hook screws; • fix all terminal pipes such as cold and hot water pipes, system inlet and return pipes, gas pipes and electrical cables into their proper holes on the dimension plate inferior part; • after this it is possible to take away the dimension plate and use it other times; • hang the boiler through the previously set expansion hooks; • for the hydraulic connections screw iron-copper joints together with previously set connections. Cut forwarded pipes according to the distance between boiler joints and iron-copper connections that are placed on the wall; • tighten them firmly and control there are no losses. N.B.: please, remember of taking lead plastic coverings away PIXEL 25 F PIXEL 25 N, PIXEL 29 F 17

Domestic water Supply net pressure is to vary from 1 to 6 bar. Install a reduction in case of higher pressure. Supply water strenght influences the cleaning frequence of the exchange serpentine pipe. The possibility of installing water treatment adequate appliances depends on water caracteristics. System loading Slowly open the loading cock up to reaching about 1 bar system pressure, which can be controlled through the pressure gauge situated on the facial panel. Close the evacuation cock again. Make the radiator air bleed using the proper manual valves. When the system is cold set the system temperature at 1 bar. In case of installation of the boiler in local where the temperature environment can go down below 0°C, we recommends you to fill the heating system with antifreeze solution. You advises to use solutions of glicole already diluted for avoiding the risk of uncontrolled dilutions. ETHILIC GLYCOLE (%) FREEZING TEMPERATURE (°C) 6 0,00 10 -3,90 15 -6,10 20 -8,90 25 -11,70 30 -15,60 40 -23,40 50 -35,50 Suggestions and advice to avoid system vibrations and noises. • avoid the use of pipes with reduced diametres; • avoid the use of bends with reduced radius; • it is better to have a hot system cleaning in order to eliminate all the impurities coming from pipes and radiators - particularly oil and fat substances - which might damage the circulating pump. e dai radiatori (in particolare oli e grassi) che rischierebbero di danneggiare il circolatore. 2.5 ELECTRIC CONNECTIONS The boiler is set to work with a 230V / 50Hz single-phase tension. Connections have to be effectuated by means of proper cables which come out of the boiler. There is also an external cable for the ambient thermostat. Connect the thermostat after having eliminated the jumper on the T.A cable terminal.. ( ATTENTION: the T.A. connection works by net tension; therefore, you should use plastic models or if they are made by metal you shuold connect them to an efficient earth system). The boiler connection has to be protected by means of a 2 pole isolator and a proper fuse (1A). The appliance has to be connected to an efficient earth system. Follow present local regulations about safety. N.B.: respect the phase and neutral position: an eventual inversion of these two positions results in a block of the ignition panel. N.B.: ARCA srl declines every kind of responsability for damages to persons, animals or things caused by the lack of a proper earth system connection and local regulation attention. 18

Effect it I lace respecting the norms of the country meticulously. Making sure that the pipeline of the gas has an adequate in operation section of his length. Before effect the connection check that the characteristics of the distributed gas are equal you to those bring on the dataplate of the boilerif these differs is necessary new regulations. Insert a faucet of interception between the net of feeding of the gas and the boiler. Open doors and windows and avoid the presence of free flames. Clean the air contained in the plant tuba-uncle-ni-apparatus. With the out boiler check that they there are not escapes of gas. In these conditions observe the gas meter counter for at least 10 minutes for verify that it doesn't signal any pas-wise of gas. Verify, in each case, all the line of gas with a solution or equivalent product. CAUTION!: For running with LPG is necessary the installation of a reduction gear of pressure awry of the boiler. 1 -Presa pressione bruciatore 2 - Presa pressione gas di rete 3 -Vent A -Vite regolazione pressione minima B - Dado regolazione pressione massima C- Cappuccio di Protezione To perform the control of the pressures to the burner, to insert the probes of the manometer in the available takings of pressure on the valve gas (you see fig.). N.B. check that the pressure and the course of the gas of net are enough to guarantee the correct operation of the instrument to perform the measure to power on burner. 19 2 1 3

You can set 4 ways of operation: a) Normal way: Mode of functioning of the boiler, temperature of supply, level of gas modulation and presence of flame are visualised. Possible anomalies are visualized as besides from coding at page 27. b) Mode of visualization of boiler parameters: It is activated by pushing P1+P2 for 6s. You can visualize in order: Heating set - supply temperature Domestical hot water set - domestical hot water temperature - water supply pressure - heat of ignition - nominal heat output c) Mode of parameters setting: It is activated by pushing P1+P2 for 9s. You visualise alternatively the number of the parameter Px and the current value. Pushing the keys P3 and P4 is possible to see in sequence the modifiable parameters, otherwise with the keys P5 and P6 it is possible to modify its value. Pressing P3+P4 you can go out of the function without memorizing the changes. Pressing P2 for 5s you go out the menu and you memorize the changes. The available parameters are: - P1 Power of ignition (by 0 % to 99 % of maximum value of range of regulation) - P2 Power of heating (by 0 % to 99 % of maximum value of range of regulation) - P3 Anti heating cicling timer (by 0 % to 99 % of 6 minutes) - P4 oF = post-ventilation of fan off / on = post ventilation of fan on - P5 Off = metano / on = GPL - P6 Not available - P6 oF = water's lack: boiler stops / on = water's lack: boiler doesn't stop, but you have to call to call service assistance. - P7 Minimum heating input (0 ÷ 100 %) - P8 oF = external sensor off / on = external sensor on - P9 K OTC (0 ÷ 6) 20

(0 = domestical hot water and heating system boiler without tank and with 2 sensor/ 1 = domestical hot water and heating system boiler with tank and with 2 sensor or only heating system boiler with tank/ 2 = domestical hot water and heating system boiler without tank or only heating system boiler without tank and with 1 sensor - Pb type oh DHW exchanger oF = with plates /on = with little tank - Pc miminum of heting supply temperature. (+15 ÷ +50) °C d) Mode of visualisation of historical failure. It is activated by pushing P1+P2 for 12s. You visualize alternatively the number of index failure(look at page 20). By pushing P3+P4 you go out of the function. By pushing P2 for 5s you can delete the historical of failure. 2.8. ADJUSTMENT INSTRUCTIONS: NOMINAL HEAT AND MINIMUM HEAT The boilers are set you set in our factory and they are predisposed for working with the type of gas of the data plate. Check the values of pressure min/max however in how much not all the nets distribute the pressure nominal gas, value on which the instrument has been regulated in factory. Check and eventually correct the thresholds of setting to proceed in the following way. ƒ Insert a manometer for gas on the taking of pressure" 1"; ƒ Turn on the boiler withdrawing the maximum course of sanitary water; ƒ Make sure that the spool of modulation is fed. 2.8.1 NOMINAL HEAT ADJUSTMENT 1. Turn on the boiler withdrawing the maximum flow of domestical water; 2. Make sure yourself that the spool of modulation is fed; 3. Remove the hood of protection" C"; 4. Adjust the maximum pressure acting on the die" B" with the aid of a key from 10 mms; rotating clockwise the pressure increases, rotating counterclockwise in sense the pressure decreases; 2.8.2 MINIMUM HEAT ADJUSTMENT 1. Set the boiler on “Winter” position (see at page 26); 2. Close the contact of ambient thermostat if you have it; 3. Set heating regulation at maximum; 4. Set heating power at maximum (see at page 26). 5. Rotate the red die" Á." up to the attainment of the suitable least pressure on the book (clockwise it increases, in sense counterclockwise it decreases); 6. Put again the hood of protection" C." 7. For the values of regulation of the heating power of the boiler see at pages 23,34 8. Withdraw the maximum flow of sanitary water to verify the pressure of the maximum heat. Remember to always close the takings of pressure after the use and to verify its correct estate 2.9 SLOW IGNITION AND NOMINAL HEAT ADJUSTMENT 2.9.1 SLOW IGNITION ADJUSTMENT The boiler is delivered already set to the following values: MET = 30 mm H2O LPG = 80 mm H2O Follow these instructions if you have to change these values: • open the domestic water to its maximal level and turn the boiler off; • turn the boiler on; • check the pressure of the gas to the burner during the cycle of ignition (the pressure of slow ignition is actually maintained to the relevation of the flame). 21 • push for 9 sec P1 and P2 and see c) “Mode of parameters setting” (look at page 20)

• To reset the value of slow ignition you need to turn off the boiler, to again act on the parameters and to remake ignitionr verifying the attainment value of desired pressure. ATTENTION: the slow ignition time for its adjustment is 5 seconds after which the nozzle pressure will increase or decrease according to the energetical need. If a further change is needed repeate this operation by turning the boiler on and off. 2.9.2 NOMINAL HEAT ADJUSTMENT The greatest heating power has to be adjusted according to system needs. Gas pressure values are shown at pages 23,24 in the table “INJECTORS PRESSURE TABLE”. For the adjustment of the burner gas pressure follow these indications: • Set the boiler on “Winter” position; • create a jumper on the ambient thermostat in order to start the boiler; • push for 9 sec P1 and P2 and see c) “Mode of parameters setting” (look at page 20) Set P1 as you need. N.B.: wait about 10 seconds to allow the pressure stabilisation after the slow ignition. 2.10 DIFFERENT GASES This is a LPG or natural gas boiler as well. The transformation from one gas type to the other one has to be carried out as follows: Transformation from methane to LPG gas • replace burner injectors • change the JP1 jumper position and set it to “LPG” position (see the electrical scheme); • adjust MIN/MAX pressure levels keeping in mind the above shown instructions; • as far as the injectors diametres and the burner gas pressure are concerned, see the above table; • after this seal the valve regulator by means of a coat drop. Transformation from LPG to methane • replace burner injectors; • change the JP1 jumper position and set it to “METHANE” position (see the electrical scheme); • adjust MIN/MAX pressure levels keeping in mind the above shown instructions; • as far as the injector diametres and the burner gas pressure are concerned, see the above table; • after this seal the valve regulator by means of a coat drop. 22

PIXEL 25 N Injectors diameters Gas diaph. Burner pressure P.C.I Inlet pressure Quantity Φ Φ Min. Heat = 10,5 KW Nom. Heat. = 27 KW Type of gas MJ/m3 mbar n° mm mm mbar mbar Metano G20 (2H+) 34,02 20 13 1,20 5,9 2,3 13,3 Metano G25 (2H+) 29,25 25 13 1,20 5,9 2,8 15,9 Metano G25 (2LL) 29,25 20 13 1,40 ------- 2,2 10,1 Butano G30 116,09 28/30 13 0,75 ------- 4,4 27,1 Propano G31 88 37 13 0,75 ------- 5,2 33,8 2.11.1 Gas pressure - Heat diagram 8 13 18 23 28 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 Burner pressure (mbar) Heat (KW) NAT.GAS H (G20) NAT.GAS L (G25) NAT.GAS LL (G25) BUTANE (G30) PROPANE (G31) 2.12 INJECTORS PRESSURE TABLE: PIXEL 25 F, PIXEL ES 25 F, PIXEL IN 25 F PIXEL 25 F Injectors diameters Gas diaph. Burner pressure P.C.I Inlet pressure Quantity Φ Φ Min. Heat = 10,5 KW Nom. Heat. = 27 KW Type of gas MJ/m3 mbar n° mm mm mbar mbar Metano G20 (2H+) 34,02 20 11 1,30 6,5 2,3 14,4 Metano G25 (2H+) 29,25 25 11 1,30 6,5 2,3 14,4 Metano G25 (2LL) 29,25 20 11 1,45 ------- 1,6 10,1 Butano G30 116,09 28/30 11 0,8 ------- 4,3 28,1 Propano G31 88 37 11 0,8 ------- 5,7 35,3 23 2.12.1 Gas pressure - Heat diagram 8 13 18 23 28 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 Burner pressure (mbar) Heat (KW) NAT.GAS H (G20) NAT.GAS L (G25) NAT.GAS LL (G25) BUTANE (G30) PROPANE (G31)

PIXEL 29 F Injectors diameters Gas diaph. Burner pressure P.C.I Inlet pressure Quantity Φ Φ Min. Heat = 12,4 KW Nom. Heat. = 31,5 KW Type of gas MJ/m3 mbar n° mm mm mbar mbar Metano G20 (2H+) 34,02 20 n° mm mm mbar mbar Metano G25 (2H+) 29,25 25 13 1,30 5,9 1,5 12,7 Metano G25 (2LL) 29,25 20 13 1,30 5,9 2,5 13,5 Butano G30 116,09 28/30 13 1,45 ------- 1,7 13,5 Propano G31 88 37 13 0,8 ------- 3,8 27,3 • only for Francia and Belgio 24 2 .1 3 .1 G a s p re s s u re - H e a t d ia g ra m 8 1 3 1 8 2 3 2 8 3 3 0 2 4 6 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 2 4 2 6 2 8 3 0 3 2 3 4 3 6 B u rn e r p re s u u re (m b a r) Heat (KW) N A T .G A S H (G 2 0 ) N A T .G A S H (G 2 5 ) N A T .G A S L (G 2 5 ) B U T A N E (G 3 0 ) P R O P A N E (G 3 1 )

3.1 INTRODUCTION All the maintenance and gas transfomation operations have to be carried out by qualified personnel. Moreover, MAINTENANCE operations have to be made at least once a year and according to local regulations. Before winter it is necessary to make the boiler be controlled by authorised personnel to have an always working system. Control: • verify the exchanger cleaning; • verify the burner cleaning; • verify the hydraulic system pressure; • verify the expansion vessel heating system efficiency; • verify the correct functioning of adjustment and safety thermostats; • verify the cleaning and integrity of sensor and ignition electrodes; • control the good circulator running; • control there are no spills (water, gas smoke evacuation); • control the gas burner pressure; • control the combustion output; • control the emission levels of CO, CO2 and NOX; • in case of a boiler spare part replacement you should use only original spare parts by ARCA. Arca refuses every kind of responsability about every damage caused by the installation of a non original spare part. ATTENTION: this boiler has a safety thermostat linked to the chimney draught which starts to work when there is a combustion product coming back in the ambient. This appliance has never to be placed out of work. If combustion products come back in the ambient, they can cause severe intoxications with even death risks. ATTENTION: after any boiler service regarding the gas pipe system it is absolutely necessary to control that unions are perfectly running and there are no gas spills. 3.2 CIRCULATION DEBLOCKING When the boiler is new or after a long standstill period you may have a circulator block. You can comply with this problem as follows: • unscrew and remove the circulator cap; • insert the screwdriver and turn it to deblock the circulator; replace the cap. 25

4.1 CONTROL PANEL Thermometer: Through the thermometer it is possible to verify the temperature of run of the circuit of heating, previously planned through the relative regulator. Manometer: It visualizes the pressure of the heating water; the value of such pressure doesn't have to be inferior to 0,8. 1 bar (cooled down circuit). If the pressure had to be inferior to \ \0,8. 1 bar (cooled down circuit). , it is necessary to handle the restoration of the correct value acting on the charge valve. This operation must be performs cooling down circuit. . Regulator temperature domestical water: The function of this handle grip is to fix the value of the temperature of use of the domestical water; acting counterclockwise in sense the lowest value of the temperature impostabile is gotten Regulator temperature of heating: Through this handle grip it is possible to plan the temperature desired of the circuit of heating: acting counterclockwise in sense the lowest value of the available temperature is gotten Summer Winter Reset With the changer in position Summer the boiler is predisposed to run for the onlyproduction of domestical water. With the changer in position Winter the boiler is predisposed to run both for the heating that for the production of domestical water. Bring the selector in position of Rearmament to reactivate the operation of the boiler after the intervention of the device of block of the burner. 26

or WINTER position: the boiler should ignite automatically. If the boiler does not ignite you will see a failure in the display. 4.3 SUMMER MODE For domestic hot water only. Push MENU to SUMMER position. Set the domestic water temperature adjustment to the desired setting. The domestic hot water production is activated. 4.4 WINTER MODE For heat and domestic hot water. Push MENU to WINTER position. Set the heating temperature adjustment to the desired setting. Room thermostat will keep the desired value. 4.5 BREAK DOWN SIGNALS CODE DESCRIPTION 01 LOCKOUT due to not ignition 02 Failure of heating system pressure 1 03 Failure of external sensor 04 Failure of heating sensor 05 Failure of DHW sensor 06 LOCKOUT due to high temperature 08 Air pressostat failure/flue gas thermostat 09 Not water circulation 4.6 TEMPORARILY TURNING BOILER OFF You can achieve it by means of: - the room thermostat ; - the MENU on the instrument panel; 4.7 LONG TERM SHUT DOWN If the boiler is to remain off for a long period of time, close the gas cock to the boiler. Before start- up, manually turn the rotating part of the circulator pump in case it froze (slightly stuck) during the down time. 4.8 SUGGESTIONS Once a year the boiler should be cleaned and checked to make sure that all components are working properly. Do not adjust the gas valve, this is to be done only by a licensed authorized technician. If there is a lockout, turn knob to reset position. If the problem happens often, call a licensed authorized technician. 27 1 Anomaly is visualized and prevented the starting the burner for P < 0,25 bar. The starting of the burner is allowed for P > 0,4 burner Subsequently to anomaly the burner starts correctly working after the pressure of heating system is corrected. To return to the normal visualization press the P2 button. Through parameter P6 is possible to start the burner however even if it foresees anomaly pressure plant, that comes all the same visualized.

SITUATION 1 The burner flame does not sparkle POSSIBLE CAUSES A. The water temperature is higher than that of the adjustment thermostat; B. The gas cock is closed; C. Out of working button; D. Lack of flame E. Lack of the ignition electrode sparkle; F. Air in the pipe system; G. The safety thermostat has started working; H. There is no system pressure . REMEDIES A. Bring the adjustment thermostat to an higher temperature; B. Open the gas cock; C. Reset it; D. Call an expert; E. Call an expert; F. Repete the ignition procedure; G. Call an expert; H. Open the charge cock and re-establish the pressure level. SITUATION 2 Violent ignition POSSIBLE CAUSES A. Flame instability; B. Insufficient gas flow; C. Uncorrectly placed ignition electrodes. REMEDIES A. .Call an expert; B. Call an expert; C. Call an expert. SITUATION 3 Gas odour POSSIBLE CAUSES A. Gas system leakage ( of both the internal and external pipe system). REMEDIES A. Close the main gas cock and call an expert. SITUATION 4 Boiler condensation POSSIBLE CAUSES A. The boiler temperature is too low. REMEDIES A. Adjust the boiler thermostat to an higher temperature. SITUATION 5 Cold radiators in winter POSSIBLE CAUSES A. The selector is to “SUMMER” position; B. The ambient thermostat is out of working or it has been adjusted to a too low temperature; C. Closed radiator system; D. Misfunctioning three ways valve. REMEDIES A. Bring it to “WINTER” position; B. Turn the ambient thermostat on and set an higher temperature; C. Open system or radiators valves; D. Call an expert. SITUATION 6 Domestic warm water little production. POSSIBLE CAUSES A. The domestic thermostat temperature is too low; B. Too many warm water samples; C. The burner gas adjustement is not correct. REMEDIES A. Increase in the domestic thermostat temperature; B. Partially close the warm water cock; C. Call an expert. 28

Via Giovanni XXIII, 105 - 20070 S.Rocco al Porto (LODI) Tel.: 0377/569677 - Fax.: 0377 569456 DECLARATION OF CONFORMITY The undersigned Michael Cavallini managing director of the ARCA S.r.l. with registered office 1° May, 16, San Giorgio –Mantova - Italy declares that he boilers BASEL 21 N, BASEL 21 N R, BASEL B 21 N, ECOS 21 N, ECOS 21 N R, ECOS B 21 N, ECOS B 21 N INOX, POCKET 24 N, POCKET 24 N R, ECOS 120/21 N, ECOfast 25 N, ECOfast 25 N R, ECOfast B 25 N, ECOfast B 25 N INOX, ECOfast 120/25 N, PIXEL 25 N, PIXEL 25 NR (PIN CODE: 0068AT020), BASEL 21 F, BASEL 21 F R, BASEL B 21 F, ECOS 21 F, ECOS 21 F R, ECOS B 21 F, ECOS B 21 F INOX, INOXA 21 F, POCKET 24 F, POCKET 24 F R, ECOfast 25 F, ECOfast 25 F R, ECOfast B 25 F, ECOfast B 25 F INOX (PIN CODE: 0068AT018), ECOS 30 F, ECOS 30 F R, ECOS 120/30 F, ECOfast 32 F, ECOfast 32 F R, ECOfast 120/32 F, MULTIPLA 32 F TR, MULTIPLA 32 F (PIN CODE: 0068AT021), BASEL 21 F cg, BASEL 21 F R cg, BASEL B 21 F cg, ECOS 21 F cg, ECOS 21 F R cg, ECOS B 21 F cg, ECOS B 21 F, INOXA 21 F cg, ECOS 120/21 F, STYLO IN 21 F, STYLO ES 21 F, ECOfast 25 F cg, ECOfast 25 F R cg, ECOfast B 25 F cg, ECOfast B 25 F, ECOfast 120/25 F, STYLOfast IN 25 F, STYLOfast ES 25 F (PIN CODE: 0068AT019), BASEL 21 F SUPER, BASEL 21 F R SUPER, BASEL B 21 F SUPER, ECOS 21 F SUPER, ECOS 21 F R SUPER, ECOS B 21 F SUPER, ECOS B 21 F INOX SUPER, INOXA 21 F SUPER, ECOS 120/21 F SUPER, STYLO ES 21 F SUPER, STYLO IN 21 F SUPER, POCKET 24 F SUPER, POCKET 24 F R SUPER, ECOfast 25 F SUPER, ECOfast 25 F R SUPER, ECOfast B 25 F SUPER, ECOfast B 25 F INOX SUPER, ECOfast 120/25 F SUPER, STYLOfast ES 25 F SUPER, STYLOfast IN 25 F SUPER, PIXEL 25 F SUPER, PIXEL 25 FR SUPER (PIN CODE: 0068AT025), BASEL 24 F, BASEL 24 F R, BASEL B 24 F, ECOS 24 F, ECOS 24 F R, ECOS B 24 F, ECOS B 24 F INOX, INOXA 24 F, ECOS 120/24 F, PANELfast 29 F, PANELfast 29 F R, STYLO ES 24 F, STYLO IN 24 F, POCKET 28 F, POCKET 28 F R, ECOfast 29 F, ECOfast 29 F R, ECOfast B 29 F, ECOfast B 29 F INOX, ECOfast 120/29 F, STYLOfast ES 29 F, STYLOfast IN 29 F, PIXEL 29 F, PIXEL 29 FR (PIN CODE: 0068AT026). PIXEL 25 F, PIXEL 25 FR, PIXEL ES 25 F, PIXEL ES 25 FR, PIXEL IN 25 F, PIXEL IN 25 FR (PIN CODE: 0068BO058 Part number aaBBBxxxxxx where aa means the year of production, BBB is ARF and means per ARCA FRANCE, TRK for Turkish market; ARC for all the other country, xxxxxx means a progressive number, prodotte e commercializzate dall’azienda ARCA Srl in via Giovanni XXIII, 105, S.Rocco al Porto (LODI) con marchio ARCA Are produced in conformity with rhe following European Directive: 90/396/CEE (Gas Appliance Directive), 92/42/CEE (Useful output Directive) 73/23/CEE (Low Voltage Directive) 89/336/CEE (Electromagnetic noise) S.Rocco al Porto, 8 Marzo 2005

46030 S. Giorgio (Mantova) (0376) 372206 Fax (0376) 374646 Factory:Via S.Giovanni XXIII,105 26865 S. Rocco al Porto (LODI) (0377) 569677 (0377) 569456