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AIC Nesta Plus 280 Installation And Maintenance Manual

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installation
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Nesta Plus
280·350·420·570·700·840 kW
floor-standing condensing boiler
EN

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Summary of Contents for AIC Nesta Plus 280

  • Page 1 installation and maintenance manual for the installer and the user Nesta Plus 280·350·420·570·700·840 kW floor-standing condensing boiler...

  • Page 2: Table Of Contents

    Routing the Cables ............I-59 ..........G-10 roduct escrIPtIon Wiring Diagram - NESTA PLUS 280 - 350 - 420 - Control Panel and Main Functions ......G-16 570 - 700 ................I-60 Symbols and Messages on the Control Panel .. G-17 Wiring Diagram - NESTA PLUS 840 ......

  • Page 3: Nesta Plus 280 & 420 Components

    Typical Display ................G-17 Fig. 41. Cleaning the Condensate Pipe and Trap ....... I-77 Fig. 12. NESTA PLUS 280 - 350 - 420 ..........G-18 Fig. 42. Removing and Installing the Burner (NESTA PLUS 280 - 350 - 420) ..........I-79 Fig. 13.

  • Page 4: G Eneral I Nformation

    eneral nformatIon Liabilities of the Manufacturer, the Installer and the End user Manufacturer Our products are manufactured in compliance î Any instruction regarding periodic checks to with the requirements of the applicable European be performed and possible anomaly to be Directives and standards, and are therefore reported delivered with all the required documentation and...

  • Page 5: About This Manual

    eneral nformatIon About this Manual This documentation is part of the product. It will be handed over to the end-user who will keep it, with all the other applicable documents, in a safe place and readily available for use. Before installing, operating or maintaining the appliance, please carefully read this manual and all the applicable documents provided with the components and accessories.

  • Page 6: Appliance Marking & Conversion Sticker

    Caldeira de Condensação de chão | Напольный конденсационный котел | Podni kondenzacijski kotao | Επιδαπέδιος Λέβητας Συμπύκνωσης | Подов Кондензен Котел | Cazan in condensatie de sol | Kondenzációs álló gázkazán Model Date MM.YYYY AIC Europe No. Product ID Serial No. G20/G20Y20/G25 G20/G20Y20/G25 Pn (80/60°C) G20/G20Y20/G25 Pn (50/30°C)

  • Page 7: Symbol Description

    eneral nformatIon Symbol Description Symbol Description Qmin Minimum heat input Electrical data Nominal heat input maximum operating Minimum heat output (80/60°C) Pmin (80/60°C) pressure Tmax maximum primary Pn (80/60°C) Nominal heat output (80/60°C) temperature water content Pmin (50/30°C) Minimum heat output (50/30°C) maximum operating pressure (DHW circuit) Pn (50/30°C)

  • Page 8: If You Smell Gas

    eneral nformatIon Safety Instructions IF YOU SMELL GAS: à à DO NOT: î Close the gas supply î Use an open flame î Open all doors and windows to venti- î Smoke late the room î Use electrical devices (phones, door- î...

  • Page 9: Nesta Plus 570 - 700 - 840

    Some optional equipment can be used with the NESTA controller, with one boiler operating as the master, and PLUS boilers. Please contact your AIC representative for the others as “slaves”. Refer to "Boilers in a Cascade more information and a list of available equipment.

  • Page 10: P Roduct D Escription

    Fig. 4. NESTA PLUS 280 & 420 Components - Front View Air inlet (equipped with a removable cover for transport) 21. Ionization electrode Gas inlet 22. Gas valve Water-cooled burner plate 23. Flame sight glass Burner door 24. Safety water temperature switch (water-cooled burner...
  • Page 11 Fig. 5. NESTA PLUS 280 & 420 Components - Top & Rear Views G-11 B-105255_EN • B...
  • Page 12 roduct escriPtion Fig. 6. NESTA PLUS 350 Components - Front View Air inlet (equipped with a removable cover for transport) 21. Ionization electrode Gas inlet 22. Gas valve Water-cooled burner plate 23. Flame sight glass Burner door 24. Safety water temperature switch (water-cooled burner Ignition transformer plate) Automatic air vent (x2) - burner plate cooling circuit...
  • Page 13 roduct escriPtion Fig. 7. NESTA PLUS 350 Components - Top & Rear Views G-13 B-105255_EN • B...
  • Page 14 roduct escriPtion Fig. 8. NESTA PLUS 570 - 700 - 840 Components - Front View Air inlet (equipped with a removable cover for transport) 20. Ignition electrode Gas inlet 21. Ionization electrode Water-cooled burner plate 22. Gas valve Burner door 23.
  • Page 15 roduct escriPtion Fig. 9. NESTA PLUS 570 - 700 - 840 Components - Top and Rear Views G-15 B-105255_EN • B...

  • Page 16: Control Panel And Main Functions

    Fig. 10. Control Panel The control panel is available in grey and white, providing a different set of languages each. Please contact your AIC representative for more information. The list of languages is shown in "Language Selection" on page U-30.
  • Page 17 roduct escriPtion Symbols and Messages on the Control Panel The following symbols are displayed on the screen (See Fig. 11): The following symbols are present on the control panel (See Fig. 11): Comfort mode active (3). The time scale (4) at the bottom of the display indicates the Domestic Hot Water mode.

  • Page 18: T Echnical S Pecifications

    PecIfIcatIons Dimensions and Clearances Fig. 12. NESTA PLUS 280 - 350 - 420 Dimensions & weights N 280 FSW N 350 FSW N 420 FSW N 570 FSW N 700 FSW N 840 FSW 2 020 2 020 2 020...
  • Page 19 echnical pecificaTionS Fig. 13. NESTA PLUS 570 - 700 - 840 Connections N 280 FSW N 350 FSW N 420 FSW N 570 FSW N 700 FSW N 840 FSW ) Ø - [M] Flange DN80 Class PN16 supply/return connections ( Inlet/outlet connections of cooling circuit / drain valve Ø...

  • Page 20: Efficiency Data

    echnical pecificaTionS Performance and N 280 FSW N 350 FSW N 420 FSW N 570 FSW N 700 FSW N 840 FSW Efficiency Data (min. - max.*) (min. - max.*) (min. - max.*) (min. - max.*) (min. - max.*) (min. - max.*) G20/ 44,0 - 265,0 48,0 - 325,0...

  • Page 21: Combustion Data

    echnical pecificaTionS N 280 FSW N 350 FSW N 420 FSW N 570 FSW N 700 FSW N 840 FSW Combustion Data (min. - max.*) (min. - max. * ) (min. - max.*) (min. - max.*) (min. - max.*) (min. - max.*) chimney type(s) B 23 - B 23p - C 43 - C 53 - C 63 - C 83 flue gas temperature at 80/60°C...

  • Page 22: Gas Data

    echnical pecificaTionS Gas Data N 280 FSW N 350 FSW N 420 FSW N 570 FSW N 700 FSW N 840 FSW (min. - max.*) (min. - max. * ) (min. - max.*) (min. - max.*) (min. - max.*) (min. - max.*) gas type(s)*** G20 - G20Y20 - G25 - G25.1 - G25.3 - G31 G20/G20Y20 (20 mbar)
  • Page 23 echnical pecificaTionS Categories Gas type Pressure (mbar) Countries of Destination II2H3P CH, CZ, ES, GB, GR, HR, IE, IT, LT, PT, SI, SK, TR II2H3P AT, CH, CZ, ES, GB, SK II2L3P 37, 50 II2L3P 20, 25 II2E+3P BE, FR 37, 50 II2E(R)3P 37, 50...

  • Page 24: Hydraulic Data

    Pressure Drop Curves Pressure Drop Curve Pressure Drop Curve Nesta Plus 570 - 700 - 840 Nesta Plus 280 - 350 - 420 Nesta Plus 280 - 350 Nesta Plus 420 Nesta Plus 570 F F l l o o w w R R a a t t e e [ [ m m...

  • Page 25: Safety Instructions For The User

    nstructIons for the Safety Instructions for the User IF YOU SMELL GAS: à à DO NOT: î Close the gas supply î Use an open flame î Open all doors and windows to venti- î Smoke late the room î Use electrical devices (phones, door- î...

  • Page 26: Periodic Checks

    nstructIons for the Periodic checks If works need to be performed ▶ close to the appliance (e.g. in the boiler room or close to the air inlets), make sure that the appli- ▶ Check regularly that the water ance is shut down to prevent the pressure of the system is at ingress and accumulation of dust.

  • Page 27: Starting The Appliance

    nstructIons for the Starting the Appliance Stopping the Appliance The first start-up of the boiler after its installa- Conditions: tion must be performed by a qualified profes- sional, according to the procedure in "Start- None ing-up and Pump Setting" on page I-66. Procedure: Push the On/Off switch located on the right side Conditions:...

  • Page 28: Basic Settings

    nstructIons for the Basic Settings Setting Procedure Controls/Screens Heating mode Press the Heating mode selection button to toggle from one selection mode to the other: • Automatic mode ( ) (to be programmed, refer to "Boiler Settings for the Installer" on page I-92 •...
  • Page 29 nstructIons for the Setting Procedure Controls/Screens Times of start Press the OK button (2) to access the end user menu. and end of Rotate the knob (1) to scroll through the menu until “Time comfort mode Program heating circuit 1” (5) is highlighted. schedule Press the OK button (2) to validate the selection Rotate the knob (1) to select “Mo-Sun 1st phase On”...
  • Page 30 nstructIons for the Setting Procedure Controls/Screens Language Press the OK button (2) to access the end-user menu. Selection Rotate the knob (1) to scroll through the menu until “Operator Section” (9) is highlighted. Press the OK button (2) to validate the selection Rotate the knob (1) to select the required language î...

  • Page 31: Structure Of Menus For The End User

    nstructIons for the Structure of Menus for the End User Some parameters are only visible if the heating circuit is installed Top menu Submenu 1 Submenu 2 Default Hours / Minutes Time of day and date ▶ 01:00 (hh:min) (Adjust as required) Day / Month 01.01 (dd.mm) ▶...
  • Page 32 nstructIons for the Top menu Submenu 1 Submenu 2 Default Room comfort setpoint Heating circuit 1 ▶ 20°C Room reduced setpoint 16°C ▶ Room frost protection 10°C ▶ setpoint Heating curve slope ▶ Summer/winter heating limit 18°C ▶ Flow temp setpoint room 65°C ▶...

  • Page 33: Safety Instructions For The Installation

    roduct nstallatIon Safety Instructions for the Installation When the appliance is connect- ▶ ed to the electrical network, it ▶ All connections (electrical, flue pipe, hy- must be earthed. draulic, gas) must be carried out in ac- cordance with current standards and ▶...

  • Page 34: Handling The Product

    roduct nstallatIon Handling the Product Transporting the Product Lifting from the side (boiler removed from the This appliance is very heavy and ▶ pallet): requires sufficient workforce to move and handle it, as well as an Slide the arms of the fork lift truck into the transport appropriate means of transport.
  • Page 35 roduct nstallatIon Lifting from the front or the back Lifting from the top: Lifting from the front or the back The boiler can be lifted from the ▶ ▶ is allowed with a hand pallet top for transport, using a forklift truck and fork lift truck.

  • Page 36: Installing And Preparing The Boiler

    roduct nstallatIon Installing and Preparing the Boiler Open top and center front panels. Refer to Using an appropriate means of transport (e.g. "Removing and Installing the Access Panels" on forklift truck, crane, etc.), move the appliance, page I-38. on the pallet and protected by its packaging, as close as possible to the installation location.
  • Page 37 roduct nstallatIon Release four screws and remove air inlet protection Follow-on Task(s): cover (4). Retain screws for reinstallation. Perform gas conversion, as required. See "Gas 10. Install appropriate air inlet connection and seal (5) Conversion" on page I-47. (N 280 FSW to N 420 FSW : 150 mm, N 570 FSW Close front panels, as required.
  • Page 38 roduct nstallatIon Removing and Installing the Access Panels Conditions: Installation Procedure Tools and Material: Top panels î Wrench, hex head, size 4 The front corner piece is attached with Removal Procedure: two screws that maintain the left and The panels must be removed and in- right top panel.If the corner piece needs stalled in the indicated order for each to be installed, do not tighten them at...

  • Page 39: Access Panels

    roduct nstallatIon Fig. 20. Removing/Installing the Top, Front and Side Access Panels Rear Top Panel - access to water temp. limit switch, water temp. sensor, air vent and pressure sensor High voltage terminal strip access panel Valve cover - Access to inlet valve of burner plate cooling circuit Condensate trap...

  • Page 40: Requirements For The Hydraulic Connections

    roduct nstallatIon Requirements for the Hydraulic Connections Safety Instructions for the Primary Circuit ▶ Consult the appliance manufactur- er to determine the compatibility of the antifreeze product with the ap- Make sure that the circuit is provided with pliance materials. a safety pressure relief valve and an ex- ▶...

  • Page 41: Water Quality Requirements To Prevent Scaling And Corrosion In A Heating System

    roduct nstallatIon Water Quality Requirements to Prevent Scaling and Corrosion in a Heating System î To prevent the formation of scale and sludge in a closed Additives can be used to keep the oxygen in heating circuit through the penetration of oxygen and solution in the water.
  • Page 42 roduct nstallatIon Water Parameters î In addition to the water hardness, other parameters of the water must be checked. Treat the water Using Table 1, based on the type of boiler, water hardness and water capacity in the heating system, you if the measured values are outside the range of can already get preliminary information about the need Table 2.

  • Page 43: Typical Hydraulic Connections - Heating Circuit

    roduct nstallatIon Typical Hydraulic Connections - Heating Circuit Isolating valve Circulating pump Filling valve Removable fi lling hose Draining valve Check valve Drain Expansion vessel Max. pressure limiter Safety group (automatic air relief valve, ma- High temperature limiter nometer, safety valve), connected to the drain In systems including a >300 kW boiler model, make sure to comply with EN 12828 requirements and install a...

  • Page 44: Hydraulic Connections - Cascaded Boilers, With External Domestic Hot Water Tank And Plate Heat Exchanger

    roduct nstallatIon Hydraulic Connections - Cascaded boilers, with External Domestic Hot Water Tank and Plate Heat Exchanger Isolating valve Heating circuit pump Filling valve DHW circuit pump Draining valve Check valve Motorised 3-way valve (when needed for low temp systems) Expansion vessel Heating circuit Safety...

  • Page 45: Hydraulic Connections - Cascaded Boilers, With External Domestic Hot Water Tank And Low Loss Header

    roduct nstallatIon Hydraulic Connections - Cascaded boilers, with External Domestic Hot Water Tank and Low Loss Header Isolating valve Heating circuit pump Filling valve DHW circuit pump Draining valve Check valve Motorised 3-way valve (when needed for low temp systems) Expansion vessel Heating circuit Safety...

  • Page 46: Safety Instructions For The Gas Connection

    roduct nstallatIon Safety Instructions for the Gas Connection Make sure that the gas type and ▶ pressure of the distribution net- ▶ When connecting the gas circuit, work are compatible with the ap- make sure to comply with all applica- pliance, as per the information on ble local regulations and standards.

  • Page 47: Gas Conversion

    roduct nstallatIon Gas Conversion ▶ Connection of the boiler to a dif- ferent gas system should com- ply with local regulations and re- ▶ Conversion of the appliance from quirements. one gas type to another can only If the boiler was running before conver- ▶...

  • Page 48: Product Installation

    roduct nstallatIon Preparing the Boiler for Gas Conversion Conditions: Tools and material: Access to the gas valve through the front of the boiler î Wrench, hex head, size 4 î Screwdriver, flat head Procedure Remove the front top panel (N 280 FSW to N 420 FSW) or left side top panel (N 570 FSW to N 840 FSW).

  • Page 49: Combustion Adjustment For Gas Conversion

    18. Press OK (2) to confirm and save the value. î “Engineer”. Press OK (2) to confirm. 19. Press ESC (3) to exit the settings. A password is required to access the Engi- neer level. Please contact your AIC repre- Follow-on Task(s) sentative for more information. î Perform combustion adjustment.

  • Page 50: Combustion Adjustment - Control Panel

    roduct nstallatIon Combustion Adjustment for Gas Conversion Conditions: Tools and material: î Flue gas analyser XXX% î Screwdriver, flat head î Wrench, hex head, sizes 2 and 2,5 Adjustment Procedure (Figs. 4 & 5): Press the heating mode selection button (1) for more than 3 seconds.

  • Page 51: Combustion Adjustment On Gas Valve

    roduct nstallatIon The offset screw is factory-sealed. After Check CO for G20Y20 gas type) contents at min. output as follows: adjustment, make sure to reseal it. î Repeat steps 1 and 2, if necessary. Restart the boiler to check the ignition behaviour. î...

  • Page 52: Safety Instructions For The Chimney Connections

    ▶ Piping elements should not be bonded malfunction. Please contact your together using glue (e.g. silicone) or foam AIC Technical Support for more (e.g. PUR). information. A condensation outlet connected to the ▶ sewer must be fi tt ed close to the appli- ance.
  • Page 53 roduct nstallatIon ▷ Do not exceed the maximum length ▷ Make sure to insulate the flue pip- recommended for the product ing in damp rooms to avoid con- when connecting the flue pipes, or densation water from forming and the system power might decrease. dripping.

  • Page 54: Chimney Connection

    roduct nstallatIon Chimney Connection Combustion circuit Sealed Connection Via separate ducts Through separate terminals that may Air inlet/flue outlet orifi ces terminate in zones of diff erent pressures Orifi ces may NOT terminate on opposite Additional requirement walls of the building Combustion circuit Sealed Connection...
  • Page 55 î Concentric ducts î Both orifi ces are close enough to come under similar wind conditions roduct nstallatIon î Chimney with natural draught only Additional requirements î Condensate flow is not allowed into the appliance 83(x) Combustion circuit Sealed Through: Combustion circuit Sealed î...
  • Page 56 roduct nstallatIon Combustion circuit Open Flue Discharged to the outside Combustion air Drawn from the boiler room Remark Can be used for cascading Make sure that the ventilation open- ings remain unobstructed at all times. Combustion circuit Open Discharged to the outside, through Flue positive pressure Combustion air...

  • Page 57: Engineering The Chimney System

    200 Pa (including max- imum wind condition) measured at the outlet of each boiler at maximum output. When the appliance is connect- ▶ Please contact your AIC representative ed to the electrical network, it for more information must be earthed. ▶...

  • Page 58: Accessing The High Voltage Terminal Strip

    roduct nstallatIon Accessing the High Voltage Terminal Strip Connections Make sure that the power supply to the Any damaged power supply cable appliance is deactivated (power supply must be replaced using cables as de- cable disconnected from the boiler) be- scribed below and installed by a quali- fore accessing the high voltage terminal fied professional.

  • Page 59: Accessing The Low Voltage Terminal Strip And Electronic Board

    roduct nstallatIon Accessing the Low Voltage Terminal Routing the Cables Strip and Electronic board Conditions: Tools and Material: î Wrench, hex head, size 4 Route the high Procedure: voltage cables Remove center front panel, see "Removing and through these holes Installing the Access Panels"...

  • Page 60: Wiring Diagram - Nesta Plus 280 - 350 - 420 - 570 - 700

    Wiring Diagram - NESTA PLUS 280 - 350 - 420 - 570 - 700 Gas Valve GNYE Flue Gas Temperature Sensor Gas pressure Switch GNYE GNYE Ignition Ignition Transformer Grounding Strip Electrode High Voltage Cable P3 C3 GNYE...
  • Page 61 OPTION - Not installed from factory D4 and D5 switches to be connected by installer to 12828. They are not provided with the appliance. Please contact your AIC Condensate GND line (L1, 6) of condensate level switch for boilers above Level Switch 300 kW, in accordance with EN 12828.

  • Page 62: Wiring Diagram - Nesta Plus 840

    roduct nstallatIon Wiring Diagram - NESTA PLUS 840 Cond Level Gas Valve GNYE Gas pressure Flue Gas Temperature Sensor Switch GNYE GNYE Grounding Strip Ignition Ignition Transformer Electrode High Voltage Cable Safety Water GNYE GNYE Temperature Switch Safety Water Temperature Switch (burner door) 8 9 10 11 12 1 2 3 N L N L...
  • Page 63 Make sure to install additional temperature and pressure limit switches. They are safety devices, mandatory for >300 kW appliances, i.a.w. EN 12828. They are not provided with the appliance. Please contact your AIC OPTION - Not installed from factory D4 and D5 switches to be connected by installer to representative for more information.

  • Page 64: Safety Instructions Before Start-Up

    ommissioning Safety Instructions Before Start-up Filling the System Conditions: Left bottom panel and valve cover removed, refer to "Removing and Installing the Access Panels" on page ▶ Check that all connections (electrical, I-38 flue pipe, hydraulic, gas) have been car- Procedure: ried out and that they are tight and se- cure.

  • Page 65: Inlet And Outlet Valves - Cooling Circuit

    ommissioning Follow-on Task(s): During the filling process, the cooling circuit of the burner plate is also filled with water and needs to be bled through the operation of the pump. Start the boiler to perform pump setup and bleed the cooling circuit of the burner plate.

  • Page 66: Starting-Up And Pump Setting

    Remove the filling hose from the filling valve, as required. "Wiring Dia- Pump Relay (Refer to gram - NESTA PLUS 280 - 350 - Close the valve cover and left bottom panel. Refer to "Removing and Installing the Access Panels" 420 - 570 - 700" on page I-60 on page I-38.
  • Page 67 ommissioning Combustion Adjustments Conditions: Tools and Material: î Flue gas analyser î Screwdriver, flat head, size 3 î Wrench, hex head, sizes 2 and 2,5 Procedure: Activate the required heating mode by pressing the î If the value is outside the range, adjust heating mode selection button (1).

  • Page 68: M Aintenance

    aIntenance Safety Instructions for Maintenance ▶ The maintenance of the appli- ance and its components must be carried out by a qualifi ed pro- fessional. Inspection and maintenance tasks must ▶ ▶ Defective parts and components may be carried out by a qualifi ed and certifi ed only be replaced by genuine factory parts professional, at least once a year.

  • Page 69: Maintenance Tasks And Requirements

    aintenance Maintenance Tasks and Requirements @ inspection @ maintenance Tasks (1 year) (2 years max) Check that the boiler room ventilation / boiler air and flue ducts are unobstructed. Verify flue gas and combustion air ducts are in good condition, sealed tight and properly supported.

  • Page 70: Shutting Down For Maintenance

    Check if the internal pump is working correctly and make sure it does not show any signs of malfunction/suspicious sounds or vibrations during operation. In case of problem, contact your AIC representative. Check the correct operation of the water pressure sensor.

  • Page 71: Draining The Boiler - Typical

    aintenance Open the drain valve ( ) to empty the heating Remove the draining hose from the drain valve (1). circuit of the boiler and part of the cooling circuit. Reconnect the pump (3) to the drain valve/inlet isolating valve (1) with union (2). When draining the boiler and the cool- ing circuit, some water will remain in the Open the outlet cooling circuit isolating valve (4)

  • Page 72: Removing And Installing The Ignition And Ionization Electrodes

    aintenance Removing and Installing the Ignition and Remove the electrode and screws from the burner Ionization Electrodes plate (3) and discard. Due to the build-up of heat, the elec- trode gaskets may stick to the surface Conditions: and may require to be scraped off the burner plate for complete removal.

  • Page 73: Replacing The Gas Valve Filter

    aintenance Replacing the Gas Valve Filter Conditions: î Left side top panel removed, refer to "Removing and Installing the Access Panels" on page I-38. Cleaning Procedure (Fig. 39): Release 2 screws and remove bottom cover (1). Retain for reinstallation. Slide filter (2) out of its casing. Discard. Insert new filter (2) into the casing.

  • Page 74: Checking The Flue Gas (Fps) And Air (Aps) Pressure Switches Operation

    Refer to "Removing and Installing the î Replace the hose and repeat steps 2 to 7. Access Panels" on page I-38 î If the values are still different, contact AIC's technical support. When performing the following pro- In case of malfunction, replace the pressure switch.
  • Page 75 aintenance N 280 FSW - N 350 FSW - N 420 FSW N 570 FSW - N 700 FSW - N 840 FSW Fig. 40. Testing the Air Pressure Switch and Flue Pressure Switch I-75 B-105255_EN • B...

  • Page 76: Removing, Cleaning And Installing The Condensate Trap

    aintenance Removing, Cleaning and Installing the Condensate Trap Installation Condensate Trap In case of first installation, go di- ▷ rectly to step 4. Conditions: ▷ Make sure to put the ball back in place in the trap before reinstalling Tools and material: the cover.
  • Page 77 aintenance Fig. 41. Cleaning the Condensate Pipe and Trap I-77 B-105255_EN • B...

  • Page 78: Removing, Checking, Cleaning And Installing The Burner

    aintenance Removing, Checking, Cleaning and Installing the Burner Conditions: Installation Procedure: To ensure correct tightness of the î Top panels removed, refer to "Removing and combustion chamber, it is essential to Installing the Access Panels" on page I-38. replace the old gaskets with new ones, Tools and Material: clean the contact surfaces and install the new gaskets in the correct loca-...

  • Page 79: Removing And Installing The Burner

    Fig. 42. Removing and Installing the Burner (NESTA PLUS 280 - 350 - 420) Fig. 43. Removing and Installing the Burner (NESTA PLUS 570 - 700 - 840) I-79 B-105255_EN • B...

  • Page 80: Tasks In Preparation To Fan And Air-Gas Mixer Removal And Subsequent To Reinstallation

    aintenance Tasks in Preparation to Fan and Air-Gas mixer Removal and Subsequent to Reinstallation Conditions: Release four screws on each side of the gas valve î Air inlet connection piece removed. Refer to (6). Carefully remove gas valve (6), hardware and 2 "Installing and Preparing the Boiler"...

  • Page 81: Air-Gas Mixer And Fan - Tasks Prior To Removal/Following Installation

    aintenance Fig. 44. Air-Gas Mixer and Fan - Tasks prior to Removal/following Installation I-81 B-105255_EN • B...

  • Page 82: Removing And Installing The Air-Gas Mixer, The Air Duct And The Fan

    aintenance Removing and Installing the Air-Gas Mixer, the Air Duct and the Fan Conditions: î Preparation tasks performed, refer to "Tasks in Preparation to Fan and Air-Gas mixer Removal and Subsequent to Reinstallation" on page I-80. Tools and Material: î Wrench, hex head, sizes 4 & 13 î...
  • Page 83 aintenance Fig. 45. Removal and Installation of the Air-Gas Mixer, Air Duct and Fan I-83 B-105255_EN • B...

  • Page 84: Nesta Plus 350 - Tasks In Preparation To Fan And Venturi Removal And Subsequent To Reinstallation

    aintenance Nesta Plus 350 - Tasks in Preparation to Fan and Venturi Removal and Subsequent to Release and remove four screws (1) from the air Reinstallation duct flange to disconnect from Venturi. Retain for reinstallation. Holding the air duct (2), slide the bottom section of Conditions: the clamp (3) out of its rails.
  • Page 85 aintenance Fig. 46. N 350 FSW - Tasks prior to Removal/following Installation of Venturi and Fan I-85 B-105255_EN • B...

  • Page 86: Nesta Plus 350 - Removing And Installing The Venturi And Fan

    aintenance Nesta Plus 350 - Removing and Installing the Venturi and Fan Installation Procedure: Conditions: Some hardware require the use of Loctite î Preparation tasks performed, refer to "Tasks in thread sealant 577 at installation. When this Preparation to Fan and Air-Gas mixer Removal is the case, a “drop”...
  • Page 87 aintenance Fig. 47. N 350 FSW - Removal and Installation of the Venturi and Fan I-87 B-105255_EN • B...

  • Page 88: Checking And Cleaning The Combustion Chamber

    aintenance Checking and Cleaning the Combustion Follow-on Task(s): Chamber Assemble the fan and air-gas mixer, as required. Refer to "Removing and Installing the Air-Gas Conditions: Mixer, the Air Duct and the Fan" on page I-82. Install the burner Plate, fan and Air-Gas mixer î...

  • Page 89: Optional Modules

    ddItIonal nformatIon for the nstaller Optional Modules Extension Module & Cable Hub Web Server Module NESTA PLUS boilers can control 3 heating circuits with Through the use of this module, you can connect to an mixing functions, using 3 extension modules. Each Ethernet and get remote access to the boiler and all extension supply needs to be provided with power the heating system via the Internet.

  • Page 90: Boilers In A Cascade System

    dditionAl nformAtion for the nstAller Boilers in a Cascade System This boiler has all the logic control of the cascaded In a heating system comprised of several boilers, it system and also regulates the stop/start sequence of is important that the power generated by the boilers each boiler according to the demand of the installation.
  • Page 91 dditionAl nformAtion for the nstAller H.C. – Heating circuit DHW Storage tank D.H.W. – Domestic hot water DHW Storage tank temperature sensor A – Mains cold water supply/drain Check valve B – DHW cold water supply Water pressure sensor Inlet temperature sensor Room unit / Room thermostat Outlet temperature sensor Mixing valve...

  • Page 92: Boiler Settings For The Installer

    Press the Info button (1) for more than 3 seconds. The access levels are displayed. A password is required to access the Engi- neer level. Please contact your AIC repre- sentative for more information. Menus and Settings The following table contains the menus and submenus for the installer (End user, Commissioning and Engineer levels).
  • Page 93 dditionAl nformAtion for the nstAller Top menu Level Pgm No. Submenu 1 Submenu 2 Default Setting Operator ▶ Programming lock ▷ Section ▷ (Cnt’d) ▶ Direct Adjustment ▷ Automatic storage Storage with ▷ Storage with confirmation confirmation ▶ Units ▷ °C, bar °C, bar ▷...

  • Page 94: Default Setting

    dditionAl nformAtion for the nstAller Top menu Level Pgm No. Submenu 1 Submenu 2 Default Setting ▶ Room comfort setpoint Heating 20,0°C circuit 1 ▶ Room reduced setpoint 16,0°C ▶ Room frost protection 10,0°C setpoint ▶ Comfort setpoint max 35,0°C ▶...
  • Page 95 dditionAl nformAtion for the nstAller Top menu Level Pgm No. Submenu 1 Submenu 2 Default Setting Heating ▶ Floor curing function ▷ ▷ Functional heating circuit 1 ▷ Curing heating (Cnt’d) ▷ Curing/Functional heating ▷ Functional/Curing heating ▷ Manually ▶ Floor curing setp manually 25°C Floor curing setp current /...

  • Page 96: Diagnostics Consumers

    dditionAl nformAtion for the nstAller Top menu Level Pgm No. Submenu 1 Submenu 2 Default Setting 8338 ▶ Hours run heating mode Diagnostics heat 8339 ▶ Hours run DHW generation 8378 ▶ Total gas energy heating 8379 ▶ Total gas energy DHW 8380 ▶...

  • Page 97: Error Codes And Solutions

    Check connection and/or sensor. Replace as required. Outside temperature sensor error Emergency operation Contact AIC technical support. Short circuit or Open circuit boiler flow Check connection and sensor. Replace as Boiler temperature 1, sensor error sensor. required. Common flow...

  • Page 98: Fault Description

    Supervision boiler temperature Contact AIC technical support. Allow device to cool down and carry out reset; No heat removal, STB interruption, if the fault occurs several times inform AIC possible short-circuit in the gas valve, technical support STB (SLT) lockout internal fuse faulty;...
  • Page 99 Water pressure 2 too low pressure. Allow the circuit to cool down and carry out Temperature limiter heating reset; if the fault occurs several times inform AIC circuit 1 technical suport. Allow the circuit to cool down and carry out Temperature limiter heating reset;...
  • Page 100 Replace as required Check connection/wiring and burner plate temp. limit switch. Replace as required Nesta Plus 280 to 840 kW (N 280 to 840 FS) Check connection/wiring and condensate level switch. Replace as required. Check connection/wiring and burner plate Short circuit or Open circuit temp.
  • Page 101 Check the circuit for fault insulation and heat losses. Allow the circuit to cool down and carry out Temperature limiter heating reset; if the fault occurs several times inform AIC circuit 3 technical suport. Internal repetition Contact AIC technical support I-101...

  • Page 102: Performing Reset

    Error Fault description Explanation Action(s) code Repetition speed Contact AIC technical support Shut off gas supply and contact AIC technical Extraneous light support Mains undervoltage Check electric supply in boiler terminals Fan speed tolerance Check air supply Check connection and sensor.

  • Page 103: Troubleshooting

    dditionAl nformAtion for the nstAller Troubleshooting Solution(s) Problem Cause(s) Check that the power butt on is in ON position (pushed in and illuminated) 2. Make sure the power supply cable is Boiler does not start No power supply connected to the mains 3.

  • Page 104: Maintenance Messages

    dditionAl nformAtion for the nstAller Solution(s) Problem Cause(s) Wrong size flue and/or Check duct sizes and correct as required combustion air ducts. Check the values with a gas analyser and Hard ignition Wrong combustion sett ings readjust as required. Check the condition and distance at stem Ignition electrode malfunction tips (refer to Electrode Removal procedure) Gas valve malfunction...

  • Page 105: Installation Checklist

    dditionAl nformAtion for the nstAller Installation Checklist Unit Values/Comments General/heating system Type of building/system Commercial purpose (Y/N) ? Year of manufacture Output of system Heated surface m² Number of heating circuits: • Floor heating • Radiators • Other Cascade (Y/N)? Number of appliances? Water Water hardness at start up...

  • Page 106: Low Loss Header

    dditionAl nformAtion for the nstAller Unit Values/Comments Low loss header in system (Y/N)? Type Number of mixers ? Buff er tank (Y/N)? Size? DHW tank (Y/N)? Type? Pump(s) (Y/N)? Type? • In which circuit(s) • Chosen according to requirements for the appliance? Flue gas Open or closed system? Dimensions of combustion air openings...
  • Page 107 dditionAl nformAtion for the nstAller Unit Values/Comments Optional items installed (Y/N)? • Outdoor sensor (Y/N)? Type? • Room unit(s) (Y/N)? Type? • Others? Miscellaneous The end user has received all relevant information (Y/N)? The end user has received all relevant documents (Y/N)? Name Date...

  • Page 108: Combustion Parameters - Log Sheet

    dditionAl nformAtion for the nstAller Combustion Parameters - Log Sheet Date & Flue gas T° Remarks Name Signature I-108 B-105255_EN • B...

  • Page 109: Water Parameters - Log Sheet

    dditionAl nformAtion for the nstAller Water Parameters - Log Sheet Recommended parameters to be checked during installation and operation of the boiler: Meter reading before initial filling: Z=…………… m Date Meter Quantity of Total alkaline Conductivity System Addition Signature reading Water earths or total value...

  • Page 110: Gas Conversion - Log Sheet

    dditionAl nformAtion for the nstAller Gas conversion - Log Sheet This appliance was converted on ____/____/_20_____ (dd/mm/yyyy) from gas _______________to gas ______________________ (Gas Type: Natural gas G20, G20Y20, G25, G25.1, G25.3/ Propane G31) with Kit ________________________________________________ (fill in with kit name or number (if required) or cross it out) by: ______________________________________________________ (name and address of organization making this conversion, who accepts responsibility for the correctness of this conversion) This appliance was converted on ____/____/_20_____...

  • Page 111: D Eclaration Of C Onformity

    eclaratIon of onformIty I-111 B-105255_EN • B...
  • Page 112 AIC Europe B.V. Graafschap Hornelaan 163A NL-6001 AC Weert The Netherlands www.myaic.eu...

This manual is also suitable for:

Nesta plus 350Nesta plus 420Nesta plus 570Nesta plus 700Nesta plus 840N 280 fsw ... Show all

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