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Jeffrey MasonSep 12, 2025
Why does the Riello Array AR 399 SE become dirty very quickly?
- GGregory KeySep 12, 2025
If your Riello Water Heater becomes dirty very quickly, it is likely due to combustion issues. Perform a combustion analysis.
To Next PageTo Next PageWhy does the Riello Array AR 399 SE become dirty very quickly?
If your Riello Water Heater becomes dirty very quickly, it is likely due to combustion issues. Perform a combustion analysis.
What causes irregular combustion in Riello Array AR 399 SE Water Heater?
Irregular combustion in your Riello Water Heater can stem from several causes: * Incorrect burner gas pressure. You should check the setting. * Incorrect orifice installed. You should check the diameter. * Dirty burner and heat exchanger. You should clean the burner and heat exchanger and perform a combustion analysis. * Obstructed heat exchanger passages. You should clean the burner and heat exchanger and perform a combustion analysis. * Faulty fan. You should check the operation of the fan and replace it if necessary.
General| Brand | Riello |
|---|---|
| Model | Array AR 399 SE |
| Category | Water Heater |
| Language | English |
Explains symbols used in the manual to convey important information and warnings.
Outlines essential safety precautions and responsibilities for installers, operators, and owners of the boiler.
Provides critical safety warnings regarding gas, overheating, water submersion, and environmental hazards.
Describes the Array AR SE as a condensing thermal module with key technical features like heat exchanger and control.
Lists the electronic safety devices installed on the CH water circuit and combustion circuit for safe operation.
Defines the intended use of Array boilers for residential, commercial, and industrial applications in closed loop systems.
Outlines the company's commitment to environmental responsibility and the recyclability of packaging materials.
Describes the procedure for emergency shutdown, including closing the manual gas shutoff valve.
Explains procedures for startup after prolonged shutdown and emergency shutoff, including specific Massachusetts regulations.
Details how products are identified, focusing on the data plate and its importance for installation and servicing.
Illustrates the system layout of the Array AR SE boiler with numbered components for identification.
Provides dimensional drawings of the Array AR SE boiler, showing width, height, and depth.
Lists detailed technical specifications for the AR 399 SE and AR 500 SE models, including input, output, and connections.
Presents thermal efficiency curves for the Array AR 399 SE and 500 SE boilers based on return water temperature.
Describes the built-in circulator with an integrated check valve and precautions for its operation.
Illustrates the water circuit of the boiler, identifying key components like the heat exchanger and pump.
Shows the location of various temperature sensors within the boiler for accurate monitoring.
Explains the function of the control panel buttons and displays, including navigation and symbols for operation.
Details compliance with national and local standards like ANSI Z223.1/NFPA 54 and CSA B149.1.
Details compliance with national and local standards like ANSI Z223.1/NFPA 54 and CSA B149.1.
Specifies the operating limits and ASME code compliance for the heat exchanger and hot water distribution system.
Outlines specific Massachusetts regulations for side wall vented gas equipment, including CO detectors and signage.
Introduces the chapter's purpose: guiding the unpacking, inspection, and installation of the RIELLO Array Boiler.
Provides instructions on how to receive the boiler unit, emphasizing inspection for shipping damage before signing.
Guides on carefully unpacking the unit, inspecting for damage, and identifying standard accessories.
Details requirements for the installation site, including power access, gas line, and location relative to drains.
Specifies that the boiler can be installed in rooms with adequate ventilation and outlines necessary clearance for safety and maintenance.
Lists recommended minimum clearances for installation and servicing around the boiler unit.
Explains how to remove packaging, secure the unit, and position it correctly on the floor.
Provides checks for installing boilers in older systems, focusing on flue, electrical, fuel lines, and pump suitability.
Specifies indoor installation requirements, clean air supply, and avoiding freezing or flammable vapor locations.
Lists acceptable water quality parameters to prevent lime buildup and corrosion in stainless steel heat exchangers.
Details the operation, maintenance, and safety of the ASME pressure relief valve, emphasizing annual testing.
Details the operation, maintenance, and safety of the ASME pressure relief valve, emphasizing annual testing.
Describes how to fill the condensate system and syphon, and the need for proper drainage and neutralization.
Guides on connecting the boiler to the system, emphasizing cleaning the system and using protective fluids.
Outlines requirements for gas connections, including fuel type suitability, clean piping, and code compliance.
Specifies the use of approved pipes for flue gas exhaust and combustion air intake, and warnings about mixing systems.
Explains the process for converting the unit from natural gas to propane, requiring a qualified technician and specific kits.
Details the procedure for adjusting and setting O2 limits using a combustion analyzer for optimal combustion.
Provides a detailed wiring diagram for the boiler's control board, including component identification and cable colors.
Explains the multi-level electronic control interface, guiding navigation and parameter access.
Maps out the multi-level menu structure of the electronic control panel, guiding navigation and parameter access.
Emphasizes the installer's role in instructing the user on boiler operation, safety, and manual usage.
Instructs on filling the condensate system and syphon with water to prevent combustion gas leakage.
Provides a step-by-step guide for filling the heating system and boiler, including checking pressure and leaks.
Highlights crucial warnings regarding gas supply, including type confirmation and conversion procedures.
Advises checking that the unit is supplied with the correct gas type and pressure as per the rating label.
Explains that conversion kits are available for different gas types and must be performed by a qualified technician.
Outlines the steps for initial boiler startup, including opening valves, turning on power, and checking the control panel.
Explains the self-protection mechanism against low water flow, where the burner shuts off automatically.
Details how to perform a heating system pressure test, checking the gauge and restoring pressure if it drops.
Describes the capability of the control system to manage multiple boilers in a cascade for coordinated heating.
Introduces the chapter on operating the Array AR SE boiler using the front control panel.
Describes the touchscreen control panel and its function for monitoring and basic setup of the boiler.
Explains the structure of the control panel menu for monitoring and setting up the unit.
Identifies the RIELLO logo screen as the entry point to the control system.
Explains the Module screen, showing plant configuration and actions like adjusting setpoints or accessing other menus.
Shows real-time performance data of the plant over the last 10 minutes, including temperatures and flame status.
Displays parameters related to the Service Reminder function, including service history and interval settings.
Details the Test screen, designed for installers to perform tests on various boiler functions like ignition and high limit.
Displays the screen for cascade systems, showing the configuration of multiple cascaded boilers.
Explains the module screen functionality within a cascade setup, allowing access to parameters and actions.
Shows real-time performance trends for cascade or module systems, including power input and temperature setpoints.
Lists the last 40 errors occurred on the modules, categorized into blocking and locking errors.
Details the Service Reminder function, which alerts the user for scheduled maintenance based on operating hours.
Describes the Module Test screen, enabling tests for each cascade module similar to the single module test screen.
Guides on replacing the front control panel, including initial setup and consistency checks between saved data.
Provides a schedule for annual and periodic maintenance tasks to ensure proper boiler function and safety.
Details how to inspect gas piping and valves for leaks using soap solution or a leak detector.
Instructs on checking vent systems for obstructions, damage, and ensuring correct connections for safe operation.
Guides on inspecting and cleaning the ignition and ionization electrodes for proper function and deposit removal.
Lists available head for the system with no glycol, for different temperature rises and pipe sizes.
Lists available head for the system with 50% maximum glycol, for different temperature rises and pipe sizes.
Lists lockout error codes, their descriptions, checks required, and potential solutions for troubleshooting.
Details blocking errors that are not automatically corrected, including required checks and solutions.
Lists specific warnings related to system errors, such as loss of communication or sensor issues.
Explains how to check pressure switches (gas, water, flue) using a multimeter and expected readings.
Describes how to check the high limit safety switch using a multimeter for proper operation.
Mentions checking the flow meter's voltage reading for proper functioning.
Illustrates a direct heating system connection layout, emphasizing pump discharge head for circulation.
Shows a layout with direct heating and indirect DHW, stressing pump discharge head for adequate circulation.
Depicts a system layout where the boiler connects to heating via a separator, showing component connections.
Illustrates a layout connecting to indirect DHW and heating via a separator, detailing component interconnections.
Presents a system layout connecting to heating and indirect DHW via a separator, showing component arrangement.
Shows a system layout connecting to two indirect DHW tanks and heating via a separator, detailing connections.
Provides data for venting size, including equivalent lengths for different pipe sizes and fittings.
Discusses guidelines for cascading multiple boilers and ensuring compliance with venting regulations.
Specifies clearances for direct vent (sealed combustion) systems, including terminals and air inlets.
Details clearances for fan-assisted appliances using room air for combustion, covering terminals and inlets.
Illustrates approved examples of horizontal and vertical venting installations, showing pipe routing and support.
Provides guidelines for installing multiple air and vent terminations, ensuring consistent height and clearances.
Explains requirements for providing combustion air from within the building, including openings and restrictions.
Details installations where combustion air is ducted directly to the unit, considering pressure losses.
Describes providing combustion air from outside the building through permanent openings, considering free area requirements.
Lists sensor resistance values at different temperatures, crucial for diagnosing sensor issues.
Presents a flowchart illustrating the operational logic for a single boiler module, covering pump, fan, and burner control.
Outlines the step-by-step process for the burner ignition sequence, including pre-purges and flame proving.
Shows a flowchart for cascade operation, detailing how boilers are managed and brought online based on demand.
Illustrates the flowchart logic for adding or removing modules within a cascade system based on demand and delay periods.
