A.O. Smith 3400 Maintenance Procedures, Maintenance Schedules, Inspect Boiler Area, Main Burner

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MAINTENANCE PROCEDURES

MAINTENANCE SCHEDULES

Yearly procedures for Service Technician:

Check for reported problems.

Check the interior; clean and vacuum if needed.

Clean the condensate trap and fill with fresh water.

Check for water/gas/flue/ condensate leaks.

Ensure flue and air lines in good condition and sealed tight

Check system water pressure/system piping/expansion tank

Check control settings.

Check spark igniter and flame sensors. Clear and clean any deposits.

Check wiring and connections.

Perform start-up checkout and performance verification.

Flame inspection (stable, uniform)

Flame signal (at least 10 microamps at high fire)

Clean the heat exchanger if flue temperature is more than 54°F (30°C) above return water temperature.

Test low water flow conditions.

Clean the heat exchanger.

Remove and clean burner using compressed air.

Maintenance by Owner: Daily:

Check boiler area .

Check pressure/temperature gauge.

Monthly:

Check vent piping.

Check air intake piping (Direct Vent).

Check air and vent termination screens.

Check relief valve.

Check condensate drain system.

Check automatic air vents .

Every 6 months:

Check boiler piping (gas and water) for leaks.

Check and operate the pressure relief valve.

End of season months:

Shut the boiler down (unless boiler used for domestic hot water)

Make sure the maintenance of the boiler must be performed to assure maximum boiler efficiency and reliability. Failure to service and maintain the boiler and system could result in equipment failure.

Make sure to turn off power to the boiler before any service operation on the boiler except as noted otherwise in this instruction manual. Failure to turn off electrical power could result in electrical shock, causing severe personal injury or death.

INSPECT BOILER AREA

1.Verify that boiler area is free of any combustible materials, gasoline and other flammable vapors and liquids.

2.Verify that air intake area is free of any of the contaminants. If any of these are present in the boiler intake air vicinity, they must be removed. If they cannot be removed, reinstall the air and vent lines per this manual.

Inspect boiler interior:

1.Remove the front access cover and inspect the interior of the boiler.

2.Vacuum any sediment from inside the boiler and components. Remove any obstructions.

GENERAL MAINTENANCE

This is a pre-mix burner system. The flame is not supposed to be directly on the burner. The flame should be just above the burner deck approximately 1/8” and blue in color, see Figure 77.

Figure 77.  BURNER FLAMES

Visually check flame characteristics through the view port located on the top head of the boiler. Figure 77 shows the normal flame condition.

These boilers are designed to give many years of efficient and satisfactory service when properly operated and maintained. To assure continued good performance, the following recommendations are made.

The area around the unit should be kept clean and free from lint and debris. Sweeping the floor around the boiler should be done carefully. This will reduce the dust and dirt which may enter the burner and heat exchanger, causing improper combustion and sooting.

MAIN BURNER

Check main burner every three months for proper flame characteristics. The main burner should display the following characteristics:

Provide complete combustion of gas.

Cause rapid ignition and carry over of flame across entire burner.

Give reasonably quiet operation during initial ignition, operation and extinction.

Cause no excessive lifting of flame from burner ports.

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Contents XP Boiler Table of Contents Approvals Safe INSTALLATION, USE and ServiceImportant Definitions General Safety Introduction Model IdentificationAbbreviations Used QualificationsDimensions and Capacity Data Operating CharacteristicsDouble Heat Exchanger Boiler Rough in Dimensions Double Ratings Electrical RequirementsFLOW, Head and Temperature Rise XB Models FLOW, Head and Temperature RiseFeatures and Components Single Heat Exchanger Boiler ComponentsDouble Heat Exchanger Boiler Components Component Description Low water cutoff board and sensor probe LwcoControl Components Flame Sensor Water Temperature Sensors Water Temperature Limit ControlsMain Power Supply Switch LOW Water Cutoff Device LwcoGeneral Boiler Installation ConsiderationsHydronic System Internal Contaminants HOT Water Boiler System General Water Line ConnectionsClosed Water Systems Thermal ExpansionExplosion Hazard GAS ConnectionsCorrosive Materials and Contamination Sources GAS Supply Line SizingField Wiring VAC Power Supply WiringPower Supply Check LOW Voltage Control WiringSuggested Pipe Size for Multiple GAS Appliances Natural GAS General Requirements Required AbilityLocation Replacing Existing Common Vented BoilerInstallation Clearances Panels and CoversChemical Vapor Corrosion LevelingFresh AIR Openings for Confined Spaces Confined Space Outdoor AIR Through TWO OpeningsOutdoor AIR Through ONE Opening Outdoor AIR Through TWO Horizontal Ducts Outdoor AIR Through TWO Vertical DuctsAIR from Other Indoor Spaces DuctsVenting Requirements for Installation in Canada Vent and AIR Pipe InstallationAIR Inlet Pipe Materials Vertical Installation Requirements Horizontal Installation RequirementsDirect Vent Installation Requirements Venting SupportsModels Vent KIT Numbers XB/XW Rain CAP Models Vent KIT Numbers XB/XW TEEModels Vent AIR Intake XB/XW KIT Numbers TEE Elbow Models Vent AIR Intake XB/XW KIT Numbers Rain CAP ElbowDirect VENT, Vertical Vent Horizontal Intake Termination Clearances Sidewall Power Vent Power VentTermination Clearances Sidewall Direct Vent Direct VentBELOW. Keep Clear of ALL Obstructions VENT/AIR Termination Locations Direct Vent Horizontal TerminationTermination Direct Venting Vertical Termination Prepare ROOF/WALL PenetrationsVertical ClearancesModel Vent Diameter Vent MIN. Length Vent MAX. Length Inch Condensate Disposal Condensate NeutralizerCondensate Trap XP Models AO Smith Condensate Neutralizer KIT NumbersGAS Supply Pipe Connections GAS Supply ConnectionsGAS Pressure Requirements Pipe Sizes for Propane GAS Purging GAS LineCheck GAS Supply Inlet Pressure Check for GAS LeaksFilling and Purging of Heating Boiler Installation Filling HOT Water Supply Boiler InstallationBoiler Start UP and Operations Manifold Pressure ConnectionsFreeze Protection Hydronic Heating Installation CHECK/CONTROL Water HardnessINSPECT/FILL Condensate System Water Hardness Medium 0-12 Grains PER Gallon XW ModelLighting and Operating Instructions Adjustment Setting of the Test ModeHigh Fire Rate Burner Control System Control SystemOverview Communications and Displays SpecificationsBurner Control Operation General Operational Sequence Domestic HOT Water Lead LAGLead LAG LL Master General Operation Local Operator Interface Display System FeaturesDefinitions Quick Setup S7999B OI Display Installation Instructions S7999B OI DisplayMounting the S7999B OI Display and Power Supply POWER-UP Validation Common OI Display page SymbolsStarting UP the S7999B OI Display NavigationS7999B Display page Flow Configure Button Status or HomeConfiguration Password LoginChange Parameter Settings KeyboardExample of Change Configuration Parameter VerifyData Comment FAULT/ALARM HandlingHistory Button Example of Hydronic History Control Expanded Alert Detail Operation ButtonDiagnostics Button System Configuration S7999B OI Display onlySystem Synchronization S7999B OI Display only ConfigurationHydronic Control Troubleshooting Code Description Recommended Troubleshooting Lockout CodesReserved ILK OFF Flame Operation Faults 105 Flame detected out of sequence Adjust the LF switch while in this position Inspect the Combustion Pressure Switch to make Code Description Recommended Troubleshooting Lockout Codes Code Description Recommended Troubleshooting Lockout Codes Code Description AllowedFan Parameter Errors Code Description Steam 20mA water temperature setting was invalid Abnormal Recycle Hardware flame bias delta high Eeprom DHW Plate Heat Exchanger Errors Maintenance Procedures Maintenance SchedulesGeneral Maintenance Inspect Boiler AreaBlower Compartment Burner MaintenanceAIR Filter BOX Heat Exchanger Maintenance Venting MaintenanceCondensate Removal System Replacement Parts Handling Ceramic Fiber MaterialsPiping Diagrams Inlet DIAStorage Tank AOS Limited Warranty Conditions and Exceptions

3400, 1700, 2000, 2600 specifications

A.O. Smith, a leader in water heating solutions, has developed a range of high-efficiency water heaters that cater to various residential and commercial needs. Among their stellar offerings are the A.O. Smith 2600, 2000, 1700, and 3400 models, each boasting impressive features, cutting-edge technologies, and excellent energy efficiency.

The A.O. Smith 2600 model is designed for those who require a robust water heating solution with a capacity to handle high-demand scenarios. It utilizes a highly efficient heating element that provides rapid heating and maintains a steady output. The built-in smart control system allows users to monitor temperature settings and track energy consumption, ensuring optimal performance.

Next in line, the A.O. Smith 2000 is perfect for households that require a reliable and efficient water heater without compromising on space. This compact model integrates advanced thermal insulation that minimizes heat loss, coupled with a powerful heating element that ensures quick heating times. Its sleek design makes it suitable for various installations while maintaining aesthetic appeal.

The A.O. Smith 1700 model caters specifically to smaller residential needs but retains features that align with higher-end models. It incorporates state-of-the-art safety features, including overheat protection and a pressure relief valve. Its lightweight structure and ease of installation stand out, making it a recommended choice for those looking for efficient heating without extensive modifications to their plumbing systems.

Lastly, the A.O. Smith 3400 is a powerhouse designed for larger commercial applications. This model offers exceptional heating capacities and includes advanced technologies such as a digital display for easy monitoring and control. The robust build is complemented by a high-performance insulation system that significantly reduces energy consumption and operating costs.

All A.O. Smith water heaters, including the 2600, 2000, 1700, and 3400 models, feature corrosion-resistant materials ensuring longevity and durability. With their commitment to quality and innovation, A.O. Smith continues to provide water heating solutions that meet modern demands while emphasizing energy efficiency and user convenience. Whether for residential or commercial use, each model represents the pinnacle of reliability and performance in water heating technology.

In conclusion, A.O. Smith has established itself as a reliable choice for water heaters, with models that cater to diverse needs without compromising on efficiency or quality.