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INSTALLAZIONE, MANUTENZIONE, USO
Installation and Servicing. To be left with the user
PIXEL MX
12/20 20/25 - 25/30 - 30/35 - 35/35
HIGH EFFICIENCY CONDENSING
Caldaie a condensazione
COMBINATION BOILER
Gas Naturale (G20) C a t . ll
GPL (G31) C a t . ll
Natural Gas (G20) Cat. ll2H3P ll2HMJP (20 mbar)
GPL (G31) Cat. ll2H3P ll2HMJP (37 mbar)
La prima accensione della caldaia e la convalida della garanzia devono essere eseguite da un tecnico qualificato
Instructions for Use
CALDAIE MURALI A GAS
PN
ll
(20 mbar)
2H3P
2HMJP
ll
(37 mbar)
2H3P
2HMJP
LIB1800P2 - Rev2 - 22/5/2019 - 66 pages
LIB1800P2 - Rev. 1 - 2/04/2019 - 52 pages
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Table of Contents
Related Manuals for Arca Caldaie PIXEL MX Series
Summary of Contents for Arca Caldaie PIXEL MX Series
- Page 1 Instructions for Use INSTALLAZIONE, MANUTENZIONE, USO Installation and Servicing. To be left with the user CALDAIE MURALI A GAS PIXEL MX 12/20 20/25 - 25/30 - 30/35 - 35/35 HIGH EFFICIENCY CONDENSING Caldaie a condensazione COMBINATION BOILER Gas Naturale (G20) C a t . ll (20 mbar) 2H3P 2HMJP...
- Page 3 ISO 9001 discipline, all boilers carry full CE marking of approval. This product is guaranteed by ARCA CALDAIE S.R.L. Via I° Maggio, 16 46030 San Giorgio - Mantova- ITALY.
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Page 4: Table Of Contents
Users instructions Sections Page Sections Users guide Installation Introduction Warning Clearances around the appliance Delivery Operating safety checks to protect Unpacking of boiler your appliance (checking the system Positioning of the boiler pressure) Flue terminal position Control panel Optional extras Plume management kit Installing the appliance for rear flue outlet... - Page 5 Sections Page Sections Page Combustion check Electrical system diagram 6.10 Checking the flue system 6.11 Checking the heating thermostat Spare parts exploded views 6.12 Testing/regulating the D.H.W flow 6.13 Keep hot 6.14 C.H. high/low temperature 6.15 Range rating central heating or/and domestic hot water 6.16 Test mode 6.17 Instructing the user...
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Page 6: Users Guide
USERS GUIDE It is the law that all gas appliances are installed by USER CONTROLS a competent person, in accordance with the gas safety installation and to the current Gas Safety This appliance is designed to operate with the minimum (Installation and Use) Regulations B.S.5440:2-(2009). -
Page 7: Control Panel
CONTROL PANEL - ON/OFF. Push button 1 to select the following functions: Fig. 3 Summer, only sanitary water mode, Winter; sanitary and heating mode OFF, boiler off - RESET/ESC HEATING Sliding buttons. P004 high or low heating temperature Setting: “0” Push to select the water value of the low (max 50°C) and “1”... - Page 8 “3” Pixel 30/35 - “4” Pixel 35/35). GRUNDFOS; anitary eously for P0011: Boiler type ng values P0014: Smokes probe sanitary/heating combi with 2 sensors, visualize Off; sanitary/heating combi with 1 sensor, heating and water storage tank, heating and water storage tank, with timer METAN DISPLAY...
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Page 9: General Layout
2.0 GENERAL LAYOUT (Fig. 3) DISPOSIZIONE GENERALE Fig. 3 Fig. 1 LEGENDA 1 - Mandata riscaldamento 16 - Ventilatore 2 - Rubinetto di carico 17 - Vaso di espansione 1 - C.H. flow 11 - Automatic air vent 21 - Sensing electrode 3 - Uscita acqua sanitario 18 - Elettrodo di accensione 4 - Ingresso gas... -
Page 10: Operating Scheme
2.1 OPERATING SCHEME (Fig. 4) Fig. 4 1 - Flue temperature sensor 10 - Overheat cut off thermostat 19 - Plate heat exchanger 2 - Main heat exchanger 11 - CH flow sensor 20 - DHW sensor 3 - Sensing electrode 12 - Gas valve 21 - DHW flow sensor 4 - Spark electrode... -
Page 11: Introduction
INTRODUCTION When starting, the fan will always start at the This boiler is designed for the production of set-point speed. central heating and domestic hot water combined in one unit. The boiler is fitted with an anti-cycling device It is fitted with an automatic domestic hot on the control board. -
Page 12: 2.7 Overall Dimension
When there is a demand for domestic hot SAFETY DEVICE water, the burner and pump perform as they do during central heating except that In both central heating and domestic hot the burner is commanded by the DHW water mode safe operation is ensured by a thermostat. -
Page 13: Technical Data Pixel Mx 20/25 Pn Nat Gas
3 TECHNICAL DATA PIXEL MX 20/25 PN TABLE A NATURAL GAS (G 20) II 2H3P - 2E3P Nominal heat Input net QMS 21.0 kW Minimum heat Input net 3.7 kW Nominal heat output 20.4 kW Nominal heat output condensing 22.1 kW Minimum heat output 3.5 kW Minimum heat output condensing... -
Page 14: Technical Data Pixel Mx 20/25 Pn Lpg
TECHNICAL DATA PIXEL MX 20/25 PN TABLE B LPG ( G 31) II 2H3P - 2E3P Nominal heat Input net QMS 21.0 kW Minimum heat Input net 3.7 kW Nominal heat output 20.4 kW Nominal heat output condensing 22.1 kW Minimum heat output 3.5 kW Minimum heat output condensing... -
Page 15: Technical Data Pixel Mx 25/30 Pn Nat Gas
TECHNICAL DATA PIXEL MX 25/30 PN TABLE C NATURAL GAS (G 20) II 2H3P - 2E3P Nominal heat Input net QMS 25.0 kW Minimum heat Input net 4.0 kW Nominal heat output 24.3 kW Nominal heat output condensing 26.4 kW Minimum heat output 3.7 kW Minimum heat output condensing... -
Page 16: Technical Data Pixel Mix 25/30 Pn Lpg
3.3 TECHNICAL DATA PIXEL MX 25/30 PN TABLE D LPG (G 31) II 2H3P - 2E3P Nominal heat Input net QMS 25.0 kW Minimum heat Input net 4.0 kW Nominal heat output 24.3 kW Nominal heat output condensing 26.4 kW Minimum heat output 3.7 kW Minimum heat output condensing... -
Page 17: Technical Data Pixel Mix 30/35 Pn Nat Gas
3.4 TECHNICAL DATA PIXEL MX 30/35 PN TABLE E NATURAL GAS (G 20) II 2H3P - 2E3P Nominal heat Input net QMS 29.0 kW Minimum heat Input net 4.0 kW Nominal heat output 28.3 kW Nominal heat output condensing 30.5 kW Minimum heat output 3.7 kW Minimum heat output condensing... -
Page 18: Technical Data Pixel Mix 30/35 Pn Lpg
TECHNICAL DATA TABLE F PIXEL MX 30/35 PN LPG ( G 31) II 2H3P - 2E3P Nominal heat Input net QMS 29.0 kW Minimum heat Input net 4.0 kW Nominal heat output 28.3 kW Nominal heat output condensing 30.5kW Minimum heat output 3.7 kW Minimum heat output condensing 4.1 kW... -
Page 19: Technical Data Pixel Mix 35/35 Pn Nat Gas
TECHNICAL DATA PIXEL MX 35/35 PN TABLE G NATURAL GAS (G 20) II 2H3P - 2E3P Nominal heat Input net QMS 33.0 kW Minimum heat Input net 4.0 kW Nominal heat output 31.5 kW Nominal heat output condensing 34.3 kW Minimum heat output 3.6 kW Minimum heat output condensing... -
Page 20: Technical Data Pixel Mix 35/35 Pn Lpg
TECHNICAL DATA PIXEL MX 35/35 PN TABLE H LPG (G 31) II 2H3P - 2E3P Nominal heat Input net QMS 33.0 kW Minimum heat Input net 4.0 kW Nominal heat output 31.5 kW Nominal heat output condensing 34.3 kW Minimum heat output 3.6 kW Minimum heat output condensing 4.0 kW... -
Page 21: General Requirements
GENERAL REQUIREMENTS BS5546: Installation of gas hot water supplies domestic purposes (2nd Family Gases). SAFETY BS5440: 1 Refers to flues. Gas Safety (Installation and Use). Regulations. BSEN 15502-2-2:2014, BS EN 15502- It is law that all gas appliances are installed 1:2012+A1:2015, BS EN 15502-2-1.2012: and serviced by a Gas Safe registered installer Gas fired central heating boilers. -
Page 22: Location Of Boiler
Manufacturers instructions must NOT be taken in Regulations applicable in Scotland, with any way as overriding statutory obligations. respect to the installation of the combination If in doubt on any point please consult Arca. boiler in a room or internal space containing a bath or shower. -
Page 23: Flue System
Allowing for the acceptable pressure loss of 1 IMPORTANT NOTICE: If the flue terminates mbar across the installation pipework, it can be below a balcony, above the ground, above a assumed that a minimum permitted operating flat roof to which people have access, then pressure of 18 mbar (nat gas) will be delivered a suitable terminal guard must be fitted if to the inlet of the appliance. -
Page 24: Pipework
4.11 BOILER INTERLOCK CONTROL 4.10 PIPEWORK Central heating system controls should be Copper tubing to BSEN 1057:1 2006, BSEN installed to ensure the boiler is switched off 1172, BSEN 1652 and BSEN 1653, is when there is no demand for heating, in recommended for water pipes. -
Page 25: Air Release Points
4.13 AIR RELEASE POINTS 4.14 MAINS WATER FEED. CENTRAL HEATING These must be fitted at all high points where There must be no direct connection to the air will naturally collect, and must be sited to mains water supply, even through a facilitate complete filling of the system. -
Page 26: Sizing Of Additional Expansion Vessel
4.15 SIZING OF ADDITIONAL EXPANSION VESSEL Deduct from the value given in the table the 7 litre vessel supplied. Safety valve setting (bar) Vessel charge pressure (bar) Initial system pressure (bar) Total water EXPANSION VESSEL VOLUME (LITRES) content of system Litres 13.7 10.3... -
Page 27: Hard Water Areas
4.18 HARD WATER AREAS INSTALLATION If the area of installation is recognised as WARNING a hard water area, it is recommended that a suitable water treatment device is installed on It is MOST IMPORTANT that this appliance is the mains supply. The water hardness can be installed in a HORIZONTAL POSITION, with determined by using the standard test paper or the flue air duct passing through the wall. -
Page 28: 5.5 Flue Terminal Position
5.5 FLUE TERMINAL POSITION... -
Page 29: 5.6 Optional Extras
5.6 OPTIONAL EXTRAS HORIZONTAL FLUE KIT BOX CONTAINING IMPORTANT: Please lubricate the (Fig 10): internal part of the seals before fitting. 52 - Self-cutting joint securing screw 57 - Elbow header 59 - Rubber seal Ø 60 Generally speaking, oils and greases are not 56 - Rubber seal Ø... -
Page 30: Plume Management Kit
FLUE EXHAUST DEFLECTION BEND (Fig 12a) PLUME MANAGEMENT KIT (Fig 12) Flue exhaust deflection bend are also available. Max 6000 mm flue extension duct as an These come in both 45° and 90° degree versions. extra cost only when requested to reduce These bends fit directly onto the flue exhaust terminal pluming nuisance of condensation from to deflect the flue gas plume in an upward... -
Page 31: Installing The Appliance For Rear Flue Outlet
Extensions must be installed with the widened INSTALLING THE APPLIANCE FOR REAR end of the pipe and the tapered end of the flue FLUE OUTLET (Fig. 13, 16, 17, 18). pipe aimed towards the exhaust terminal. FOR APPLIANCE CLEARANCES SEE SECT. - Page 32 Fig. 8 CONDENSING WATER 3 BAR 3/4" 1/2" 3/4" 1/2" 3/4"...
- Page 33 SIDE FLUE OUTLET NOTE: The position of the appliance must provide minimum side clearances of 5mm as the side panels do not require removing for servicing. However, if the option is preferred to remove the panels then a minimum clearance of 55mm is required. Fig.
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Page 34: Completing Horizontal Flue Installati
5.10 COMPLETING HORIZONTAL FLUE INSTALLATION. Ensure the flue system has been checked for soundness, is stable and secure. Where the horizontal flue terminal passes through the external wall, it is essential that the flue must be sealed on both in exterior and interior part of the wall, and securing screws fitted. - Page 35 5.13 VERTICAL FLUE INSTRUCTION ONLY (Fig. 19-20-21) SEE SECT. 4.10 FOR PERMISSIBLE FLUE POSITION IN-LINE FLUE BEND - 1000 mm MUST BE DEDUCTED FROM OVERALL LENGTH FOR EACH 90° BEND OBTUSE FLUE BEND - 500 mm MUST BE DEDUCTED FROM OVERALL LENGTH FOR EACH 135° BEND. The vertical flue kit is intended for use where L + L = 8m Max a horizontal flue outlet is not possible or desired.
- Page 36 Cut a 105 mm diameter hole through the ceiling and/or Starting at the appliance end, assemble the roof, at the point previously marked. extension duct sections, making each inner and Fit a roof flashing slate to the roof, available from Arca. outer (flue) joint by inserting the spigot end into Insert the Vertical Flue terminal assembly through the the socket end of the next tube, making sure the...
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Page 37: Twin Flue Instructions
5.14 INSTALLATION INSTRUCTIONS FOR TWIN FLUE PIPE (ECCENTRIC FLUE DUCT SYSTEM) Part. No Description SDO160050 Twin flue header F80/F80 PRO110200 Straight pipe L.1000 80 CUR110150 90° elbow bend 80 CUR110200 45° bend 80 GRI110050 Air inlet terminal 80 GRI110100 Exhaust terminal 80 TER060110 Vertical eccentric flue Terminal 5.15... -
Page 38: Exhaust / Suction System With Concentric Pipes For Flat Or Sloping Roofs. Extensions With Two Separate Pipes
IMPORTANT: - See fig. 6 for terminal clearances. IMPORTANT NOTICE: - Inlet and exhaust terminals must never be installed on opposite walls of the building (PrEN 483). - If the flue terminates less than 2 m above a balcony, above the ground, or above a flat roof to which people have access, then a suitable terminal guard must be fitted. -
Page 39: Installation Instructions For
5.19 INSTALLATION INSTRUCTIONS FOR CONCENTRIC 80/125 FLUE SYSTEM The vertical 80/125 flue kit is intended for use where a horizontal 60/100 flue outlet is not possible or desired. The vertical flue can be installed on either a flat roof or a pitched roof (maximum pitch 60°). Where a straight vertical flue is not possible or desired, an offset vertical flue can be used in conjunction with a side horizontal flue extension... -
Page 40: Assemble Boiler
5.20 ASSEMBLE BOILER 5.24 DOMESTIC HOT WATER CONNECTION (Fig. 29) 5.21 Fitting valve pack Remove plastic caps from boiler connection The domestic hot water circuit does and fit valves as per fig. 29 using the washers not need a safety valve but it is essential to provided. -
Page 41: Safety Valve Discharge
5.26 SAFETY VALVE DISCHARGE The drain pipe should have a fall of a least The safety valve is located to the rear 2.5° away from the boiler. Condensate should, (15 mm copper) to permit a discharge pipe if possible be discharged into the household to be connected. -
Page 42: External Controls
5.29 OUTDOOR SENSOR 5.28 EXTERNAL CONTROLS For use, consult Outdoor Sensor IMPORTANT: instructions. Electricity supply must be as specified in clause (sect. 4.22). COMMISSIONING - When controls external to the appliance are required, design of the external electrical Each boiler has been through a rigorous circuits should be undertaken by a operational testing procedure at our factory competent person. -
Page 43: Setting The Heating System Design Pressure
- Starting with the lowest radiator open each FILLING THE HOT WATER SYSTEM air release tap in turn. Close when the water is clear, free of bubbles and flows Close all hot water draw-off taps. out. In the same way release air from any Open the cold water inlet cock. -
Page 44: Check The Gas Pressure
- The ignition control will automatically make Anti-clockwise to increase CO three attempts to start, if it doesn’t start this Clockwise to decrease CO may be due to air in the gas supply line. After any new regulation wait to stabilise If the burner fails to light, the digital led for about one minute. -
Page 45: Checking The Flue System
6.10 CHECKING THE FLUE SYSTEM - Select a different temperature for DHW. to ensure it operates at its various setting. The flue system should be visually checked - Close the draw-off tap still further. The for soundness. Check all connections and burner should stop when the rate falls below fixings are secure and tight. -
Page 46: Range Rating Central Heating Or/And Domestic Hot Water
6.15 RANGE RATING CENTRAL HEATING OR/AND DOMESTIC HOT WATER The boiler comes set, in Central heating, at the MID RANGE of its output. TABLE 10/A Range rating regulation of Central Heating Heat input (kW) - Fan speed (rpm) C.H. regulations HE 25 C HE 30 C HE 35 C... -
Page 47: Servicing Instructions
This will ensure the optimum fuel economy for the household requirements of both heating and hot water consumption. COMPETENCE TO CARRY OUT THE CHECK Advise the User of the precautions OF COMBUSTION PERFORMANCE. necessary to prevent damage to the system, and to the building, in the event Please note: BS6798:2009 Specification for of the system remaining inoperative during installation and maintenance of gas-fired... -
Page 48: To Inspect And Clean The Appliance
WARNING: Examine internal pipe-work connections and automatic air vent for any water leaks Before the start of any servicing or and rectify if necessary. replacement of components always Examine and remove loose debris from isolate the electricity supply to the the combustion chamber using a soft appliance and always turn off the brush and vacuum cleaner. -
Page 49: Replacements Of Parts
REPLACEMENT OF PARTS GENERAL Replacement of parts must be carried out by a competent person. Before replacing any parts the boiler should be isolated from the mains electric supply and the gas should be turned off at the service cock on the boiler. After replacing any parts always test for gas soundness and if necessary carry out functional test of the controls. -
Page 50: To Remove/Replace The Electrodes
TO REMOVE/ REPLACE THE TO REMOVE/REPLACE THE BURNER ELECTRODES (Fig.37) (FIG.42) Remove the front panel (fig. 39). Remove the front panel (fig. 39). Remove the ignition and/or sensing lead Unscrew the gas pipe nut and remove plug. the retaining clip. Detach the connectors Unscrew the securing screws with a from the fan. -
Page 51: To Remove/Replace Expansion
TO REMOVE/REPLACE EXPANSION VESSEL (Fig.43) Remove the front and bottom panels (fig. 39-40). Close the on/off valves for the heating circuit and drain the water at the drain point (fig.36). Unscrew the fixing bracket and the nut connecting the expansion vessel. Lift up the vessel and remove. -
Page 52: To Remove/Replace Diverter Valve Motor
8.12 TO REMOVE/REPLACE DIVERTER 8.14 TO REMOVE/REPLACE D.H.W. VALVE MOTOR (Fig. 46) DIVERTER VALVE MECHANISM ( Fig. 46) Remove the front and bottom panels (fig. 39-40). Remove the front and bottom panels Detach the electrical plug and remove the (fig. 39-40). retaining clip. -
Page 53: To Remove/Replace Safety Relief Valve
8.17 TO REMOVE/REPLACE SAFETY RELIEF VALVE (Fig. 46) Remove the front and bottom panels (fig. 39-40). Close the on/off valves for C.H. circuit and drain the water from at drain point fig.36. Unscrew the safety relief valve screw and pull up. Replace in reverse order and using a new gasket. -
Page 54: To Remove/Replace Control Board
8.22 TO REMOVE PANEL CONTROL BOX (Fig. 50,51). Fig.50 Remove the front panel (fig. 39). Pull the control panel box until it is slightly out of the boiler. As doing so move the box forward until the control box becomes free. This will allow free access to lower part of the boiler. -
Page 55: Fault Finding Central Heating
9 FAULT FINDING CENTRAL HEATING Before trying to operate the boiler make sure that: all gas supply cocks are open and the gas supply has been purged of air. The heating system pressure is at least 1 bar min to 1.5 bar max, select winter position on the digital display and set the central heating temperature to maximum. -
Page 56: Log Of The Errors
LOG OH THE ERRORS 8.1 LOG OF THE ERRORS (ex. Gas lock) It is possible see the last errors that are recorded by the boiler, pushing the keys 1 and 5 for 5 seconds. Push the buttons + and – of sanitary (5 and 6) to see all the errors sequence. -
Page 57: Electrical System Diagram
ELECTRICAL SYSTEM DIAGRAM Fig. 55... - Page 58 10 List of parameters - adjustable by the INSTALLER (Pushing keys 2 e 4) Parameters Range Description Value Default 16 ÷ P20 Max fan speed in HEATING Visualized in RPM/100 16 ÷ P22 Max fan speed in SANITARY Visualized in RPM/100 0 = Off 0 ÷...
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Page 60: Spare Parts Exploded Views
11 SPARE PARTS ESPLOSO PARTI DI RICAMBIO... - Page 61 Pixel 20-25 MX PN spare parts tav.1 (2019) POS. CODE DescriptioN TEL1850P COMPLETE FRAME LRV1800P VESSEL SUPPORT LSC1800P CONTROL PANEL SUPPORT LSI1800P HYDROMETER SLIDING SHEET LFT1800P HYDROMETER FIXING SHEET LFT1801P AIR TUBE FIXING SHEET LSS1800P SYPHONE SHEET SUPPORT FIAV1800P PIXEL MIX SIDE PANEL PAMV1800P PIXEL MIX FRONT PANEL CCR1100P...
- Page 63 Pixel 20-25 MX PN spare parts tav.2 (2019) 25-30 MX PN 30-35MX PN 35-35MX PN POS. CODE Description SCAMX1024PN 25 EXCHANGER- BURNER UNIT SON1800P FUMES PROBE ELE1800P IGNITION ELECTRODE ELE1801P DETECTION ELECTRODE VNT1800P VNT1830P VNT1830P GAM1800P MIXER GAM1823P GAM1828P GAM1828P TUB1850P COMPLETE AIR SUCTION TUBE MOL1806P...
- Page 65 Pixel 20-25 MX PN spare parts tav.3 (2019) Pixel 25-30 Pixel 30-35 Pixel 35-35 MX PN MX PN MX PN CODE Description CIR1800P CIRCULATOR MIX VAL1801P AIR VENT VALVE - MIX ORI1408P O-RING R8 (8.9 x 2.7) EP 851 MOL1801P CLIP D10 TAP1801P CIRCULATOR SCREW CAP...
- Page 66 ARCA CALDAIE S.R.L. Via I° Maggio, 16 46030 San Giorgio - Mantova- ITALIA Tel.: 0039/0376/372206 - Fax: 0039/0376/374646 e-mail: arca@arcacaldaie.com - website: www.arcacaldaie.com Arca reserves the right to make changes and improvements in our products which may affect the accuracy of the information contained in this leaflet.
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