American Water Heater BCL3 85T390 6NOX, BCL3 95T199 6NOX Features and Components, Controls

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Controls

Features and Components

 

 

130

CONTROL BOX

ON/OFF SWITCH

140

 

RESET BUTTON

VARIABLE

FREQUENCY

DRIVE

DIGITAL

THERMOSTAT

I/O MODULE

LOW SPEED

I/O MODULE

HIGH SPEED

BLOCKED INLET SWITCH

BLOCKED FLUE SWITCH

IGNITION

BLOWERCONTROL

PROVER

SWITCH

Figure 1.

Variable Frequency Drive (VFD)

The VFD controls the speed of the combustion blower. The VFD runs the blower at low speed during the ignition trial period and adjusts to high speed after ignition.

I/O Module (Low and High Speed) - the I/O modules switch the VFD from low speed to high speed blower operation.

Blocked Inlet Switch - the blocked inlet switch stops burner operation if the blower air intake becomes blocked.

Blocked Flue Switch - the blocked flue switch stops burner operation if the exhaust outlet becomes blocked.

Blower Prover Switch - the blower prover switch stops the burner ignition sequence if the blower does not operate.

LED

FUSE

LIGHTS

 

DIGITAL THERMOSTAT

Figure 3.

Electronic Ignition Control

Each heater is equipped with an ignition control. The solid state ignition control (Figure 4), ignites the burner by utilizing a spark igniter. The spark igniter shuts off during the heating cycle and the burner flame is sensed through a remote flame sensor.

The ignition control will try to ignite the burner three times before lockout. The control waits 15 minutes before trying again to ignite the burner. This is a continuous cycle.

The Eliminator (self-cleaning system)

These units include The Eliminator (Self-Cleaning System) installed in the front water inlet, see Figure 2. The Eliminator inlet tube can only be used in the front water inlet connection. Do not install the Eliminator inlet tube in either the top or back inlet water connection. The Eliminator must be oriented correctly for proper function. There is a marked range on the pipe nipple portion of the Eliminator, that must be aligned with the top of the inlet spud. A label above the jacket hole has an arrow that will point to the marked portion of the pipe nipple if the orientation is correct. If the arrow does not point within the marked range on the pipe nipple, adjust the pipe nipple to correct. A pipe union is supplied with the Eliminator to reduce the probability of misaligning the Eliminator accidentally while tightening the connection to the inlet water supply line. Improper orientation of the Eliminator can cause poor performance of the heater and can significantly reduce outlet water temperatures during heavy draws.

IGNITION CONTROL

Figure 4.

Blower/Burner Assembly

Note: The Eliminator may have 1, 3 or 7 cross tubes.

Figure 2.

High Limit Switch

The digital thermostat (Figure 3) contains the high limit (energy cutout) switch. The high limit switch interrupts burner gas flow should the water temperature reach 203°F (95°C).

In the event of high limit switch operation, the water heater cannot be restarted unless the water temperature is reduced to approximately 120°F (49°C). The high limit reset button on the front of the control then needs to be depressed.

Continued manual resetting of high limit control, preceded by higher than usual water temperature is evidence of high limit switch operation.

Contact your dealer or service agent if continued high limit switch operation occurs.

Figure 5.

Spark Igniter

The ignition control energizes the Spark Igniter to ignite the Burner.

Intake Air Screen

The intake air screen is attached to the inlet end of the combustion blower. Inspect the intake air screen every six months. The intake air screen should be cleaned of any buildup of debris or foreign material.

Flame Sensor

The control system monitors the flame sensor to confirm that flame is present at the Burner. If a flame is not verified during the ignition trial period (4 seconds) the control system will immediately de-energize the 24 VAC Gas Valve as indicated on the Sequence of Operation Flow Chart (Figure 24).

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Contents Commercial gas water heaters Table Of Contents Approvals Safe Installation, Use and ServiceFire and Explosion Hazard General Safety InformationGrounding Instructions PrecautionsHydrogen Gas Flammable Qualifications Qualified Installer or Service AgencyIntroduction Abbreviations UsedControls Features and ComponentsEliminator self-cleaning system Blower/Burner Assembly High Limit SwitchRecovery Capacities, based on 82% efficiency Installation considerationsRough In Dimensions Rough-In-DimensionsClearances Locating the Water HeaterCirculation Pumps NSF Leg KitInsulation Blanket Hard WaterBreathing Hazard Carbon Monoxide Gas High Altitude InstallationsInstallation Requirements Thermal Expansion Temperature-Pressure Relief ValveDishwashing Machines Closed Water SystemsContaminated Air Combustible Material StorageValve Discharge Pipe Requirements Venting Air RequirementsUnconfined Space Confined SpaceOutdoor Air Through Two Horizontal Ducts Multiple Heater Manifold Outdoor Air Through One OpeningFresh Air Openings for Confined Spaces Outdoor Air Through Two OpeningsAir From Other Indoor Spaces Outdoor Air Through Two Vertical DuctsMultiple Gas Fired Tank-Type Heaters Type B GAS VentModel ABCL3 85T275 6NOX Water Line Connections Water heater installationValve Discharge Pipe Tube Inlet Installation Installation Diagrams Top Inlet/Outlet UsageHeater Wiring Gas Meter Size Natural Gases Only Gas Line Leak TestingGas Piping PurgingPrior to Start Up Start upInitial Start Up Checking the Input Water Temperature AdjustmentMultiple Appliance Installations Checking VentingLighting & Operating Label Sequence of OperationYES Sequence of Operation Flow ChartIntake Air Screen MaintenanceTemperature-Pressure Relief Valve Test Venting SystemTo Flush the Water Heater Storage Tank Draining and FlushingDeliming Solvents To Drain the Water Heater Storage TankDeliming Using Flo-Jug Method Tank Cleanout ProcedureIgnition Control System System DiagnosticsElectrical Servicing Operational Conditions High Water Temperature Shut OFF SystemFor Your Information Start Up ConditionsQualified Service Agency TroubleshootingComplaint Cause Remedy User Water Piping DiagramsTemperature & Pressure Temperature & Pressure Relief Valve Circulating Pump Multi Flue 2 Units Multi Flue 2 Units with Vertical Storage Tank Multi Flue 2 Units with Vertical Storage Tank Return from Multi Flue 2 Units TWO Temperature Multi Flue 2 Units with Booster TWO Temperature MULTI-FLUE 3 Units MULTI-FLUE 3 Units with Vertical Storage Tank MULTI-FLUE 3 Units with Horizontal Storage Tank Multi Flue Flue 4 Units MULTI-FLUE 4 Units with Vertical Storage Tank MULTI-FLUE 4 Units with Horizontal Storage Tank Model Dimension a Page Conditions and Exceptions Service and Repair ExpensesClaim Procedure ALL Other Parts

BCL3 95T199 6NOX, BCL3 85T390 6NOX, BCL3 85T275 6NOX specifications

American Water Heater Company has been a leader in the production of high-quality water heaters for residential and commercial use. Among their acclaimed collection are three notable models: the BCL3 85T275 6NOX, BCL3 85T390 6NOX, and BCL3 95T199 6NOX. Each of these models is meticulously designed, providing efficient heating solutions while prioritizing safety and environmental responsibility.

The BCL3 85T275 6NOX is an advanced model that offers a remarkable 275,000 BTU output, making it suitable for a variety of applications, from single-family homes to larger commercial settings. This unit features a powerful water heating capacity and is equipped with a robust heat exchanger that maximizes thermal efficiency. One of its key technological innovations is the low nitrogen oxide (NOX) emissions system, which significantly reduces harmful emissions, thereby complying with stringent environmental standards.

Similarly, the BCL3 85T390 6NOX enhances performance with a higher BTU output of 390,000. This capacity allows it to effectively serve larger facilities with higher demand for hot water. The technology behind this model includes an automatic flue damper that optimizes energy use by adjusting the airflow, resulting in improved combustion efficiency. Additionally, its durable construction ensures long service life, catering to the needs of both residential users and commercial operations.

The BCL3 95T199 6NOX, with its 199,000 BTU capacity, combines efficiency with versatility. This unit is designed for a wide range of water heating needs, providing an excellent option for both medium-sized homes and smaller commercial setups. Its unique design incorporates advanced insulation materials that help retain heat longer, thereby enhancing overall efficiency. Like its counterparts, this model is equipped with advanced NOX reduction technology, which makes it an environmentally friendly choice.

All three models share a common theme of reliability and efficiency. Their advanced control systems enable precise temperature management, allowing users to set their desired hot water temperatures with ease. Furthermore, each unit is designed with safety features such as a high-temperature limit switch and electronic ignition, ensuring safe operation.

In conclusion, the American Water Heater BCL3 series — featuring the BCL3 85T275 6NOX, BCL3 85T390 6NOX, and BCL3 95T199 6NOX — showcases the company's commitment to innovation, quality, and environmental stewardship. These models not only meet the demanding needs of consumers but also contribute to a more sustainable future with their low emissions and efficient systems. Whether for residential or commercial use, they are designed to deliver reliable performance year after year.
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