Riello Condexa PRO NA 75P Installation, Operation And Service Manual

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Summary of Contents for Riello Condexa PRO NA 75P

Page 1 WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life. Do not store or use gasoline or other flammable vapors and liquids or other combustible materials in the vicinity of this or any other appliance.
Page 2 Please accept our thanks, and congratulations on your choice of CONFORMITY product. Riello S.p.A. The Condexa PRO NA boiler range complies with: INTENDED USE This boiler must only be used for the purpose specified by the manufacturer and for which it is designed.
Page 3: Table Of Contents
CONTENTS 1 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Block diagram 2 .
Page 4: General Information
GENERAL INFORMATION GENERAL INFORMATION WARNING: when servicing the boiler and venting components ensure the boiler components and venting components are installed properly per the Installation, Operation & Service In- 1.1 Key to symbols structions for the boiler as well as the vent manufacturer's installation instructions and the local code having jurisdiction are followed.
Page 5: Warnings
GENERAL INFORMATION 1.3 Warnings The following instructions must be observed − The boiler must only be used for its designated purpose, − Gas fired hot water boiler for either direct vent installation. observing the Installation Instructions. Design according to: ANSI Z21.13-2017 CSA 4.9-2017 – Gas- −...
Page 6 GENERAL INFORMATION Observe these instructions as general warnings: WARNING: If the information in these instructions is not fol- − recommends that an inhibitor - suitable for use with lowed exactly, a fire or explosion may result causing property stainless steel heat exchangers - is used to protect the damage, personal injury or death.
Page 7: Description Of The Appliance
GENERAL INFORMATION 1.4 Description of the appliance 1.5 Safety devices The Condexa PRO NA it is a condensing, pre-mixed thermal mod- All appliance functions are electronically controlled by a dual pro- ule consisting in a modulating thermal element. cessor technology board. It's available in two models of power: 75 kW (255.900 BTU/hr) and Any malfunction results in the appliance being shut down and the 117 kW (399.000 BTU/hr).
Page 8: Identification
GENERAL INFORMATION 1.6 Identification The products are identified by: RIEL LO S.p.A. (ITALY) Certified by _____________________ MAWP Water Maximum water temp. ° C ° F Heating surface SQ FT Minimum relief valve capacity kg/h lb/hr Electrical rating (burner) Less than 12 Amperes SERIAL NUMBER Year built: ________...
Page 9: System Layout
GENERAL INFORMATION 1.7 System layout Condexa PRO NA 75 P Flue gas exhaust connection Exhaust flue temperature sensor Gas valve Combustion chamber PCB (printed control board) Flue check valve Drain cock Minimum Pressure Switch (set to 7 psi/0.5 bar) 10 Pump Power switch 12 Central heating return 13 Gas supply...
Page 10 GENERAL INFORMATION Condexa PRO NA 117 P Flue gas exhaust connection Exhaust flue temperature sensor Combustion chamber PCB (printed control board) Flue check valve Drain cock Minimum Pressure Switch (set to 7 psi/0.5 bar) Pump 10 Power switch Central heating return 12 Gas supply 13 Central heating supply 14 Condensate drain connection...
Page 11: Technical Specifications
GENERAL INFORMATION 1.8 Technical specifications Description Unit Condexa PRO NA 75 P Condexa PRO NA 117 P Boiler category ASME Section IV ASME Section IV Type of Gas Natural Gas, Propane* BTU/hr 255.900 399.204 Max input rate (kW) (75) (117) BTU/hr 25.590 39.920...
Page 12: Pumps
GENERAL INFORMATION 1.10 Water circuit Condexa PRO Condexa PRO AHRI certified ratings Unit NA 75 P NA 117 P Input 255.9 399.2 6 7 8 Heating Capacity 243.1 379.2 AFUE Combustion Efficiency 10.2 - 10.8 9.4 - 9.6 1.9 Pumps The Condexa PRO NA 75 P and Condexa PRO NA 117 P are equipped with a built-in circulator.
Page 13: Control Panel
GENERAL INFORMATION 1.12 Control panel CONTROL PANEL AND SYMBOLS Backlit display (4 13/16" x 1 1/2" / 255mm x 80mm) RESET key: restores normal operations after a safety lock-out MENU key: switches on the main menu ESC key: in menu navigation, it enables you to exit a menu item and go back to the previous one 5 - 9 Navigation keys ◄, ▼, ●, ►, ▲...
Page 14: Regulations And Guidelines
GENERAL INFORMATION 1.13 Regulations and Guidelines − In the event that the side wall horizontally vented gas fu- eled equipment is installed in a crawl space or an attic, the hard wired carbon monoxide detector with alarm and bat- NOTE: Observe all rules, regulations, standards and guidelines tery back-up may be installed on the next adjacent floor applicable to the installation and operation of this appliance level.
Page 15: Installation
NOTE: The instruction manual is an integral part of the appli- ance; therefore, it should be read and stored carefully. NOTE: Keep the documentation envelope in a safe place. Any replacement documents must be ordered from Riello S.p.A. who reserve the right to charge for the cost of the replacement.
Page 16: Installation Premises
INSTALLATION 2.3 Installation premises 2.4 Installation in older systems and systems requiring modifications The Condexa PRO NA can be installed in rooms that are perma- nently ventilated and equipped with suitably sized ventilation When installing these boilers in older systems or systems requiring openings in line with Technical Standards and Regulations appli- modifications, always perform the following checks: cable to the installation site.
Page 17: Boiler Assembly
INSTALLATION 2.6 Boiler assembly The Condexa PRO NA boilers are supplied complete with a wall-mounting bracket. CAUTION: Check that the wall on which the appliance is to be fitted is sufficiently solid and supports safe screw fixing points. NOTE: The appliance's height must be selected so as to facili- tate dismantling it and maintaining it.
Page 18: Water Connections
INSTALLATION 2.7 Water connections The dimensions and position of boiler's hydraulic connections are shown in the table below. Front view Bottom view DESCRIPTION Condexa PRO NA 75 P Condexa PRO NA 117 P 15 3/16" (386mm) 15 3/16" (386mm) 5 5/8" (142mm) 5 5/8"...
Page 19: Asme Pressure Relief Valve
INSTALLATION 2.8 ASME pressure relief valve Maintenance of the relief valve The Condexa PRO NA has a pressure relief valve supplied with the CAUTION : The valve lever must be operated at least once a year boiler. by qualified personnel during annual maintenance to insure Connect the valve hydraulically on the heating supply connection that water-ways are clear.
Page 20: Typical Water System Schematics
INSTALLATION 2.10 Typical water system schematics Layout 1: circuit with boiler directly linked to heating system (check that the pump's discharge head is sufficient to ensure ade- quate circulation) CONDEXA PRO North America Layout 2: circuit with boiler directly linked to heating system and indirect DHW tank. (check that the pump's discharge head is sufficient to ensure adequate circulation) CONDEXA PRO North America...
Page 21 INSTALLATION Layout 3: circuit with boiler connected to a heating system via a separator CONDEXA PRO North America Layout 4: circuit with boiler linked to Indirect DHW tank and heating system via a separator CONDEXA PRO North America 1 7 8 Isolating valve 10 Automatic air vent Outdoor temperature...
Page 22 INSTALLATION Layout 5: circuit with boiler linked to heating system and indirect DHW. tank via a separator CONDEXA PRO North America 1 7 8 Isolating valve Diverter valve Outdoor temperature Check valve 12 Pump sensor DHW circulation pump 13 High-temperature system circulator High temperature Expansion tank 14 Indirect tank circulator...
Page 23: Gas Connections
If the appliance needs to be adapted for use with another gas fuel, refer to section "Converting gas type". For further infor- mation please contact your local Riello distributor. Ensure the piping is thoroughly clean The gas meter's flow rate is capable of ensuring the simul- taneous use of all the appliances connected to it.
Page 24 INSTALLATION To prevent contamination of the boiler, do not install combus- CAUTION: Make sure that condensation is not built up along tion air intake and gas flue exhaust pipes near: the exhaust flue pipe. For this purpose, provide a slope of at −...
Page 25: Venting And Air Piping System
INSTALLATION 2.13 Venting and air piping system The unit is to be used for either direct vent installation or for in- stallation using room air for combustion. When room air is used, it is necessary to provide an adequate opening for the fresh air intake.
Page 26 INSTALLATION The following figure shows the acceptable piping installation for venting and combustion air. Two pipes side wall Two pipes vertical Air intake side wall, vent vertical Air intake vertical, vent side wall (Direct venting) (Direct venting) (Direct venting) (Direct venting) Concentring vertical pipe Concentring side wall pipe One pipe venting side wall (or vertical)
Page 27: Connecting Flue Gas Systems
INSTALLATION 2.13.2 Connecting flue gas systems Insert the exhaust pipe and the air intake pipe as shown in the following figure: Optional vent systems are: − Twin pipe, concentric pipe and 1 pipe using room air, ap- proved cascade system; −...
Page 28: Installation Of The Exhaust And Air Intake System
INSTALLATION 2.13.3 Installation of the exhaust and air intake system NOTE: Do not extend exposed vent pipe outside the building beyond recommended distance of 39” or 1 meter. Condensate could freeze and block vent pipe. INSIDE CORNER DETAIL Fixed Fixed Operable closed closed...
Page 29 INSTALLATION NOTES: (1) Canadian installations must comply with the current CSA B149.1 Natural Gas and Propane Installation Code and local building codes. (2) US installations must comply with current ANSI Z223.1/NFPA 54 National Fuel Gas Code and local building codes. (3) Concentric vent must protrude from the roof 24”...
Page 30: Vent And Combustion Air Pipe Length [For Single Boiler Installations]
INSTALLATION 2.13.4 Vent and combustion air pipe length [For In the following tables are listed the equivalent length for CPVC single boiler installations] pipes: 4” (100 mm) 5” (130 mm) The maximum length for vent and combustion air pipes can be 1 ft (0.3m) 1 ft (0.3m) 1 ft (0.3m)
Page 31: Approved Examples Of Horizontal And Vertical Venting Installation
INSTALLATION 2.13.5 Approved examples of horizontal and vertical Horizontal venting system (room air only); X≥4” (102 mm) venting installation NOTE: Place pipe supports a minimum of every 5 feet (1.525 mm) for horizontal and vertical runs, beginning with a sup- port near the boiler unless the vent manufacturer or local code states smaller intervals.
Page 32 INSTALLATION Horizontal venting system (sealed combustion); X≥4” (102 Vertical venting system (sealed combustion); X > 12" (305 mm); Y ≥12” (305 mm) mm); Y 12" (305 mm) above maximum snow level or at least 24" (610 mm) whichever is greater Vertical venting system (sealed combustion);...
Page 33 INSTALLATION Horizontal venting system (sealed combustion); X≥4” (102 Vertical venting system (sealed combustion); X > 12” (305 mm); Y 12" (305 mm) above maximum snow level or at least 24" (610 mm) whichever is great Horizontal concentric system (sealed combustion)
Page 34: Multiple Boilers
INSTALLATION 2.13.6 Multiple boilers Vertical venting system (sealed combustion) When installing multiple air and vent terminations, be sure that: − The clearance between the vent and air termination are in accordance with the figures shown in this chapter − All vent pipes and air inlets must terminate at the same height Concentric vent and combustion air vertical termination;...
Page 35: De-Rating For Altitude Installation
INSTALLATION Multiple air and vent vertical terminations; X ≥ 12" (305 mm); Multiple air and vent vertical termination ; X≥ 12" (305 mm); Y≥ 12" (305 mm) Y≤ 25" (635 mm); Z = 12" (305 mm) to 16" (406 mm) Air intake Vent Vent terminals...
Page 36: Multiple Boiler Cascade System
INSTALLATION 2.13.8 Multiple boiler cascade system Exhaust system (B2B lay-out with 6 boilers) It is possible to connect up to 6 boilers in a cascade system. If the number of cascade boilers is greater than six then separate vent systems should be used. The following images show the different systems to link the boilers in cascade.
Page 37: Vent And Combustion Air Pipe Length For Cascade System
INSTALLATION 2.13.9 Vent and combustion air pipe length for Both common air intake and exhaust system (sealed com- cascade system bustion) In the following tables are the maximum allowed length for flue pipe cascade system. The length is for each intake and exhaust system.
Page 38: Preparation For The Condensate Drain
INSTALLATION 2.13.10 Preparation for the condensate drain The exhaust of the condensation produced by the Condexa PRO NA during its normal operation, must be carried out with an ac- cessory (siphoned condensate collector) that needs to be installed below the boiler as specified in its assembly instructions. The con- densate coming out of the drain must be collected and disposed in the sewer system, if necessary by using a neutralizer, according to the following procedure:...
Page 39: Water Chemistry Guidelines
INSTALLATION 2.13.11 Water Chemistry Guidelines In the following table are listed the chemical water specifications. Parameters Value General feature Colorless, no sediment NOTE: If using anti-freeze: Dissolved Oxygen <0.05 ppm − Follow the boiler manufacturer’s instructions on antifreeze Total iron (Fe) <...
Page 40: Emptying
INSTALLATION 2.14.2 Emptying − Unscrew the air vents release cap − Open the shut-off cocks in order to slowly fill the system − Use a pressure gauge to check that the pressure is rising Before starting to empty the appliance and the storage cylinder: and the water is exiting through the air vents −...
Page 41: Wiring Diagram
INSTALLATION 2.15 Wiring diagram J6-3 J6-10 J6-12 J6-5 J7-3 b J7-2 h J7-2 J7-4 J12-4 J12-1 J7-6 J7-7 J7-8 J12-2 J12-5 J21-1 / J6-1 J21-5 / J6-2 J21-4 / J6-8 J21-6 J21-3 10 11 12 13 14 15 16 17 18 0-10V RT Modbus BUS 1...
Page 42 INSTALLATION J2-1 J2-2 J2-4 J1-4 J1-5 J1-1 J2-6 J3-5 J3-10 J4-2 J4-3 J4-6 J4-5 J4-4 J4-1 J5-2 J5-1 J3-1 J3-7 J3-2 J3-3 J3-8 J3-4 J2-3 J3-9 J3-6 bl 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 PS (120V ~ 60Hz) Boiler circulator Cable colour...
Page 43: Ladder Diagram
INSTALLATION 2.16 Ladder diagram Wire line type sensor LWCO External Low Water Cut Off Cable colour _______ factory wiring Exhaust flue BUS1 Bus connection brown _ _ _ _ field wiring temperature sensor BUS2 Bus connection blue System temperature Power switch sensor Indirect tank pump white...
Page 44: Electrical Connections
INSTALLATION 2.17 Electrical connections CAUTION: Before connecting any external electrical compo- nents to the appliance (regulators, electric valves, climate The Condexa PRO NA is manufactured fully wired and only needs control probes, etc.), check to make sure that their electrical to be connected to the main power supply, the room/heat de- characteristics are compatible with the available inputs and mand thermostat and any other system components.
Page 45 INSTALLATION Loosen the screws (2) and remove the cover (3) For connection, see the following figure: ~ 120 V 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 Circuit breaker Relay / Switch (120V AC) Refer to the device type for the supply tension.
Page 46 INSTALLATION Electrical wiring referred to layout 2 at page "20". Electrical wiring referred to layout 4 at page "21". 10 11 12 13 14 15 16 17 10 11 12 13 14 15 16 17 101 102 103 104 105 106 101 102 103 104 105 106 0-10V Modbus...
Page 47: Electronic Control
INSTALLATION 2.18 Electronic control The electronic control interface menu is multi-level. Navigation between the various levels is shown in the figures below. Level 0 displays the Home Screen (Home). Level 1 displays the Main Menu screen. The subsequent levels are activated depending on available sub-menus.
Page 48: Menu Structure
INSTALLATION 2.18.1 Menu structure...
Page 49 INSTALLATION...
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Page 53 INSTALLATION...
Page 54: Parameters' List
INSTALLATION 2.18.2 Parameters' list Parameters are listed base on the reference menu. Reference Menu Access type Boiler parameters menu End user System cascade settings menu Installer Boiler cascade settings menu Appliance configuration menu Nr. dis- Par. Default Access Menu played Description Range Category...
Page 55 INSTALLATION Nr. dis- Par. Default Access Menu played Description Range Category setting type Display Design Limits the minimum value that can be assigned to Supply 39 - 180 the set-point in heating mode (does not apply to 86 (30) °F (°C) Heating Min.
Page 56 INSTALLATION Nr. dis- Par. Default Access Menu played Description Range Category setting type Display tank Establishes the DHW indirect storage tank set-point 104-160 122 (50) °F (°C) set- Par. 35 in mode 2. (40-71) point Speed Defines the fan rpm at max. power (it depends on Defined 0-12750 General...
Page 57 INSTALLATION Nr. dis- Par. Default Access Menu played Description Range Category setting type Display Prog. 0 Disabled Defined Input The value of this parameter is defined by Par. 97. General 1 Enabled by Par. 97 0 Disabled 1 General Pump 2 CH Pump 3 DHW Pump 4 System Pump...
Page 58 INSTALLATION Nr. dis- Par. Default Access Menu played Description Range Category setting type Display Activates bleeding the system's air. To activate air bleeding, it is necessary to switch on the boiler and change the parameter from "No" to "Yes". Wait for one minute. Switch off and restart. At this stage, when it is restarted the boiler will initiate Dair the automatic bleeding procedure (lasting around...
Page 59 INSTALLATION Nr. dis- Par. Default Access Menu played Description Range Category setting type Display Defines how many degrees the temperature mea- Hyst. Up sured by the primary circuit's sensor must go above 0 - 72 Quick the set-point in order for the subsequent boiler to 11 (6) °F (°C) Cascade...
Page 60 INSTALLATION Nr. dis- Par. Default Access Menu played Description Range Category setting type Display Managing, Boiler Stand- Defines the way in which the boiler is managed. Stand-alone, Cascade Address alone Dependent Max. Defines the maximum decrease in the primary Setp. 0 - 72 circuit's cascade set-point and is based on the sec- 5.6 (2)
Page 61: Configuration Of The Main Block Diagrams
CONFIGURATION OF THE MAIN BLOCK DIAGRAMS 3 CONFIGURATION OF THE MAIN BLOCK DIAGRAMS RT / OS / 0-10V CAUTION: The DHW and heating circuits must be complet- DEPENDING MANAGING ed with expansion tanks of a suitable capacity and correctly sized pressure relief valves. The discharge of the pressure relief valves and the appliances must be connected in accordance with local code and the authorities having jurisdiction.
Page 62: Configuration Of The Secondary System
CONFIGURATION OF THE MAIN BLOCK DIAGRAMS 3.2 Configuration of the secondary system For the sake of simplicity, the hydraulic circuits downstream of the separator can be identified as the secondary system. Optimal use of the boilers in cascade occurs by placing a hydraulic The basic configuration of the secondary system takes place using separator (available as a third party accessory) between the pri- a system circulator (CHP).
Page 63: Block Diagram 1
CONFIGURATION OF THE MAIN BLOCK DIAGRAMS 3.3 Block diagram 1 Circuit with boilers with their own circulator, connected in cascade. DEPENDING DEPENDING MANAGING Boiler circulator Indirect tank circulator DHW circulation pump System circulator (high temperature zone) DHW Indirect storage tank sensor Outdoor temperature sensor Primary sensor Domestic cold water inlet...
Page 64: Sensor Connections Block Diagram 1
CONFIGURATION OF THE MAIN BLOCK DIAGRAMS 3.3.2 Sensor connections Block diagram 1 3.4 System parameters Block diagram 1 MANAGING CONNECTIONS NOTE: See the section "Commissioning and maintenance" for a detailed description on parameter operation MANAGING Essential parameters to be configured for the block diagram 1: 10 11 12 13 14 15 16 17 18 Managing Depending...
Page 65: Block Diagram 2
CONFIGURATION OF THE MAIN BLOCK DIAGRAMS 3.5 Block diagram 2 Circuit with thermal modules with their own circulator, connected in cascade. Using the secondary sensor. DEPENDING DEPENDING MANAGING Boiler circulator Domestic cold water inlet Indirect tank circulator Domestic hot water outlet DHW circulation pump System circulator (high temperature zone) DHW Indirect storage tank sensor...
Page 66: Sensor Connections Block Diagram 2
CONFIGURATION OF THE MAIN BLOCK DIAGRAMS 3.5.2 Sensor connections Block diagram 2 DEPENDING CONNECTIONS MANAGING CONNECTIONS DEPENDING MANAGING 10 11 12 13 14 15 16 17 18 10 11 12 13 14 15 16 17 18 0-10V RT Modbus BUS 1 LWCO BUS 2 0-10V RT...
Page 67: Commissioning And Maintenance
COMMISSIONING AND MAINTENANCE 4 COMMISSIONING AND MAINTENANCE 4.2 Introduction WARNING: Before starting the boiler, the user must be correctly 4.1 Lighting instructions instructed by the installer, on how to operate the heater, in par- ticular: − There are several steps involved in starting up the boiler. −...
Page 68: Gas Type Conversion
COMMISSIONING AND MAINTENANCE 4.6 Gas Type Conversion 4.7.2 Date and time setting Press the MENU button and select "Settings" with the ▲ / ▼ but- If the gas available at the installation site is not the type the boiler is configured to use, the boiler must be converted. Special con- tons version kits are available for this purpose inside the boiler.
Page 69: Password Access
COMMISSIONING AND MAINTENANCE 4.7.3 Password access Values can be changed with the ▲ / ▼ buttons. Confirm the value entered by pressing the ● button and move to the next value. To access the parameters, press the MENU key and select "Settings" with the ▲...
Page 70: Setting The Heating Parameters And Outdoor Reset
COMMISSIONING AND MAINTENANCE 4.7.4 Setting the heating parameters and outdoor The parameters regulating such temperature are: reset Par. Description Parameter 1 establishes the boiler's various heating operation Sets the desired supply temperature with heating mode. modes. Active for the heating mode Par. 1 = 0 or 3 Limits the minimum value that can be assigned to the Mode 0 set-point in heating mode (does not apply to heating...
Page 71 COMMISSIONING AND MAINTENANCE Mode 2 (Working on climatic mode and controlled by a room/heat de- Supply Temp. mand thermostat, variable set point according to the outdoor °F (°C) temperature) Tset max °F (°C) Par. 24 In this case the boiler operates with a set-point defined by the climatic curve (which can be set in the same way as described in Par.
Page 72 COMMISSIONING AND MAINTENANCE Mode 3 Mode 4 (Continuous fixed set-point operation and controlled by room/ (Set-point adjustment based on a 0-10V analog input) heat demand thermostat) In this mode the fixed set-point is adjusted in the same way as The parameters that control this mode are the following: described for Mode 0.
Page 73: Setting The Domestic Hot Water Parameters
COMMISSIONING AND MAINTENANCE 4.7.5 Setting the domestic hot water parameters − Use the ► button to highlight the value, and use the ▲ / ▼ buttons to change the selected value. Press the ● button to Parameter 35 defines the various operation modes of the boiler confirm/save the new settings.
Page 74: Scheduled Program
COMMISSIONING AND MAINTENANCE Priority setting Holiday program The holiday program is used to exclude part of or all the circuits at Parameter 42 sets the priorities between the DHW and CH circuit. a certain time of the year. Four modes are available: A holiday can be set both on the full system and on various groups Time: timed priority between the two circuits.
Page 75 COMMISSIONING AND MAINTENANCE Heating programming DHW setting Group Group “ ” “ ” Program Comfort Period Program Comfort Period “ ” “ ” Comfort Setpoint 82.4 °F Out of interval setpoint “ ” “ ” “ ” “ ” ECO Setpoint 68.0 °F “...
Page 76: Boiler Information
COMMISSIONING AND MAINTENANCE As part of a group selection, the Holiday Group is displayed with − At date: excludes heating (CH+zone) when the current date the following parameters: is included between the start and end dates. − Holiday set-point: Set-point type to be used for the se- lected group.
Page 77: Checks During And After Initial Start-Up
COMMISSIONING AND MAINTENANCE By selecting "Service" and pressing the ● button, the following NOTE: The display shows four lines at a time. You can scroll the values are displayed: list by using the ▲ / ▼ buttons. − Service History (each time a "Maintenance reminder reset" is performed, the event is logged) Boiler Status −...
Page 78: Error List
COMMISSIONING AND MAINTENANCE − Press the MENU button, select "System test" and press ● − Check the full cycle of the boiler and the heat demand by opening the “RT” contact (OFF). button to confirm. − Check that the boiler has come to a complete stop by set- ting the main switch of the equipment to off and the main Menu switch of the system to “off”.
Page 79: Permanent Errors
COMMISSIONING AND MAINTENANCE 4.9.1 Permanent Errors Error Description REFHI_TOO_HIGH / REFHI_ Internal software error Error Description TOO_LOW E2PROM_READ_ERROR Internal software error REFHI_TOO_HIGH / REFHI_ Internal software error Three unsuccessful ignition TOO_LOW IGNIT_ERROR attempts in a row REFHI_TOO_HIGH / REFHI_ Internal software error GV_RELAY_ERROR Failure detected in the GV relay TOO_LOW...
Page 80: Converting Gas Type
COMMISSIONING AND MAINTENANCE 4.10 Converting gas type − unscrew the nuts (1) that connect the fan to the upper flange of the heat exchanger 4.10.1 Converting gas type LPG The Condexa PRO NA is equipped for natural gas. It can be convert- ed to LPG (propane) using the appropriate accessory kit 20150039 (75 P) - 20150040 (117 P).
Page 81 COMMISSIONING AND MAINTENANCE − remove screws (5) in order to get out the mixer − Reassemble the front panel and lock the locking screws. − Open the gas shutoff valve. − Switch the power supply ON at the system's main switch and at the control panel.
Page 82: Converting Gas Type Mtn
COMMISSIONING AND MAINTENANCE 4.10.2 Converting gas type MTN − Press the ▼ button, select "Config. Confirmed" and press the ● button − With the ▲ / ▼ buttons change the value to "Yes" and press In order to restore the Natural Gas configuration, use the originally the ●...
Page 83 COMMISSIONING AND MAINTENANCE − unscrew the nuts (1) that connect the fan to the upper − remove screws (5) in order to get out the mixer flange of the heat exchanger − remove the flexible air intake pipe (2), by unscrewing the metal collars (3) −...
Page 84 COMMISSIONING AND MAINTENANCE − Press the ▼ button, select "Config. Confirmed" and press − Reassemble the front panel and lock the locking screws. the ● button − Open the gas shutoff valve. − With the ▲ / ▼ buttons change the value to "Yes" and press −...
Page 85: Combustion Analysis
COMMISSIONING AND MAINTENANCE 4.11 Combustion Analysis CO2 ADJUSTMENT AT MAXIMUM POWER − Press the MENU button, select "System test" and press ● The Condexa PRO NA is supplied for operation with natural gas, as button to confirm. indicated by the rating plate, and has already been factory-cali- brated by the manufacturer.
Page 86: Temporary Or Short-Term Shut-Down
COMMISSIONING AND MAINTENANCE CO2 ADJUSTMENT AT MINIMUM POWER Version Condexa PRO NA 117 P − Select "Min. power" with the ▲ / ▼ buttons and press ● button to confirm. System Test “ ” Test State Low Power “ ” “...
Page 87: Preparing For Extended Periods Of Shut-Down
COMMISSIONING AND MAINTENANCE 4.14 Maintenance − Select "Mode" with the ▲ / ▼ buttons, and confirm with ● button. Select “System” mode and confirm. It is required to perform a maintenance and cleaning of the device at least once a year. Holiday Settings “...
Page 88: Service Reminder" Function
COMMISSIONING AND MAINTENANCE BURNER GASKET INSPECTION WARNING: Before carrying out any maintenance or cleaning, You must maintain the boiler as outlined in this manual and have disconnect the power from the device by turning off the main the boiler started up and serviced at least annually by a qualified switch and closing the main gas valve.
Page 89: Cleaning And Removing Internal Components
COMMISSIONING AND MAINTENANCE 4.15 Cleaning and removing internal components Loosen the screws (2) and remove the cover (3) Before any cleaning operation, disconnect the electrical power supply by switching the main system switch to "off”. OUTSIDE Clean the casing, the control panel, the painted parts and plastic parts with damp cloth, using soap and water.
Page 90 COMMISSIONING AND MAINTENANCE Disassembling the fan and burner model Condexa PRO NA 75 P Disassembling the fan and burner model Condexa PRO NA 117 P − Remove the locking screw and the panel's front side − Remove the locking screw and the panel's front side −...
Page 91 COMMISSIONING AND MAINTENANCE Disassembling the flange for cleaning the heat exchanger model Disassembling the flange for cleaning the heat exchanger model Condexa PRO NA 75 P Condexa PRO NA 117 P − Remove the locking screw and the panel's front side −...
Page 92: Troubleshooting
COMMISSIONING AND MAINTENANCE 4.16 Troubleshooting FAULT CAUSE SOLUTION − Check the seal of the gaskets and the There is a smell of gas Gas supply circuit leaks pressure test ports/taps for leaks − Check the gasket seals Odour of unburnt gas Flue gas circuit −...
Page 93: System Management
SYSTEM MANAGEMENT 5 SYSTEM MANAGEMENT WARNING: The setting must be carried out on each boiler. For configuration of the individual boiler, refer to the following table. 5.1 Communication between the boilers Communication between boilers is necessary when using a cas- cade system to prevent short-cycling and allow equal run-times Dip switch ON between units.
Page 94: Setting Parameters Of The Cascade Systems
SETTING PARAMETERS OF THE CASCADE SYSTEMS 6 SETTING PARAMETERS OF THE CASCADE SYSTEMS 6.1 Parameters specific to cascade systems Parameters are listed base on the reference menu. Reference Menu Access type Boiler parameters menu End user System cascade settings menu Installer Boiler cascade settings menu Appliance configuration menu...
Page 95 SETTING PARAMETERS OF THE CASCADE SYSTEMS Nr. dis- Par. Factory Access Menu played Description Range Category setting type Display Defines the maximum increase in the primary cir- Max. Setp. 0 - 72 °F cuit's cascade set-point. It is based on the primary 9 (5) Cascade Offset Up...
Page 96: Setting The Main Parameters
SETTING PARAMETERS OF THE CASCADE SYSTEMS 6.1.1 Setting the main parameters 6.1.5 General operation Some parameters are essential in order for the system to operate With a cascade system, the regulator of the managing boiler es- in cascade and setting these parameters is a determining factor tablishes a setpoint to be sent to the depending boilers based on for correct system operation.
Page 97: Parameter 148: Operating Mode Of The Cascade
SETTING PARAMETERS OF THE CASCADE SYSTEMS 6.4.2 Par 148 = 1 defines the time (from the start of the request) from which the setpoint modulation is started defines the proportional term for setpoint modulation In this mode the system manages the cascade so that the mini- defines the integrative term for setpoint modulation mum number of boilers is on.
Page 98: Par 148 = 2
SETTING PARAMETERS OF THE CASCADE SYSTEMS 6.4.3 Par 148 = 2 In this mode the system manages the cascade so that the maxi- mum number of boilers is on. This mode is similar to mode 0 apart from the start-up and shut- down rules.
Page 99: System Manager
SYSTEM MANAGER SYSTEM MANAGER 7 SYSTEM MANAGER − Adjust the room thermostats for the high and low tem- perature zones to the required temperature (~68 °F/20 °C) or, if the systems are equipped with a programmable ther- 7.1 Commissioning mostat, make sure it is on and adjusted (~68 °F/20 °C) WARNING: The appliance must be maintained and adjusted at least once a year by a qualified service agency in compliance with all applicable National and Local codes.
Page 100: Temporary Or Short-Term Shut-Down
SYSTEM MANAGER SYSTEM MANAGER 7.2 Temporary or short-term shut-down − Close the fuel and water valves for the heating and domes- tic hot water system. In the event of a temporary or short-term shut-down (e.g. due to holidays), proceed as follows: −...
Page 101: Useful Information
SYSTEM MANAGER SYSTEM MANAGER 7.6 Useful information Seller: ................Installer: ................Mr./Ms.: ................Mr./Ms.: ................Address: ................Address: ................Tel.: .................. Tel.: .................. Technical Assistance Service: ..........Mr./Ms.: ................Address: ................Tel.: .................. Date Work done Fuel Supplier: ..............Mr./Ms.: ................Address: ................
Page 102: Modbus Connection
SYSTEM MANAGER MODBUS CONNECTION 8 MODBUS CONNECTION Registers Depending on the type of Modbus device used to connect to the The boiler is equipped with a Modbus connection (based on the boiler, the registers' addressing may start from 0x0000 or 0x0001. RS485 communication standard) that supports the remote man- If addressing starts from 0x0000, the numbers of the registers list- agement and adjustment of the boiler.
Page 103 SYSTEM MANAGER MODBUS CONNECTION Status parameters Dependent information Access Access Register Automatic Value Register Automatic Value Description Description number conversion range number conversion range See "State" Dependent 01 State table See "State" State See "Sta- table Status tus" table See "Error" Error code See "Error"...
Page 104 SYSTEM MANAGER MODBUS CONNECTION Parameters registers Access Register Automatic Value Description Access number conversion range Register Automatic Value Description Note number conversion range Dependent 09 Heating See "State" mode (Par. 0..x State table See "Error" DHW mode Error code 0..x tables (Par.
Page 105 SYSTEM MANAGER MODBUS CONNECTION STATE table Register Automatic Value Access Description Note number conversion range Name Description Minimum RESET_0 Initialization of reset variables value RESET_1 Reset that can be Depends STANDBY_0 Standby assigned on °C/°F PRE_PURGE Initialization of pre-purging variables to the units heating...
Page 106: Commissioning Log For The Appliance
SYSTEM MANAGER COMMISSIONING LOG FOR THE APPLIANCE 9 COMMISSIONING LOG FOR THE APPLIANCE NOTE: Please complete a separate log for each appliance. Home owner/operator: Last name, first name Number, Street Telephone/fax ZIP code, town System installer: Order number: Appliance type FD (Date of manufacture): Date commissioned: �...
Page 107 SYSTEM MANAGER COMMISSIONING LOG FOR THE APPLIANCE Modified service functions: (select the modified service functions and enter the values here). Example: Vent Length Parameter changed from 1 to 2 Heating control: Gas type setting (par 98 “Gas Type”) � NG | � LPG CH set point (par.
Page 108: Recycling And Disposal
SYSTEM MANAGER RECYCLING AND DISPOSAL 10 RECYCLING AND DISPOSAL The appliance is manufactured using various materials, such as metal, plastics, and electric and electronic components. At the end of the life cycle, safely remove the components and dispose of them in a responsible manner, in compliance with the installation country's applicable environmental legislation.
Page 109 SYSTEM MANAGER RECYCLING AND DISPOSAL NOTES...
Page 110 SYSTEM MANAGER RECYCLING AND DISPOSAL NOTES...
Page 111 SYSTEM MANAGER RECYCLING AND DISPOSAL...
Page 112 RIELLO S.p.A. Via Ing. Pilade Riello, 7 37045 - Legnago (VR) www.rielloboilers.com NORTH AMERICAN DISTRIBUTOR: Evergreen Products International Inc. 2125 South Service Rd. W Unit A, Oakville, ON L6L 5W CANADA Technical Support Hotline: 1.844.387.4663 Email: info@egproductsolutions.com Professional Resources: egproductsolutions.com The manufacturer strives to continuously improve all products: appearance, dimensions, technical specifications, standard equipment and accessories are therefore liable to modification without notice.

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Condexa pro na 117p Condexa pro series 20142594 20142595

Riello Condexa PRO NA 75P Installation, Operation And Service Manual

1 General Information

2 Installation

3 Configuration of the Main Block Diagrams

4 Commissioning and Maintenance

5 System Management

6 Setting Parameters of the Cascade Systems

7 System Manager

8 Modbus Connection

9 Commissioning Log for the Appliance

10 Recycling and Disposal