American Water Heater ULTRA LOW NOx SERIES 104, BCL, 381T1206NOX, 381T1546NOX manual AIR Supply

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AIR SUPPLY:

Stoichiometric or theoretical complete combustion requires 10 cubic feet of air per 1,000 BTU of gas supplied. The National Fuel Gas Code also recommends an additional 2.5 cubic feet of “excess” air. For information on minimum make-up air opening sizes for various building installations, refer to the National Fuel Gas Code NFPA 54/ANSI Z223.1.

INSUFFICIENT MAKE-UP AIR, NEGATIVE AIR PRESSURE AND DOWNDRAFTS:

Downdraft Caused by Kitchen Vent Hood

A lack of combustion and ventilation air can create a negative ambient air pressure in the installed space. The vent system on one or more gas fired appliances can experience down drafts due to the outdoor air pressure being greater than the ambient air pressure in the installed space. Where multiple gas fired appliances are installed, one or more gas fired appliances can “pull air” through the vent system(s) of other appliances installed nearby.

One common example is in a restaurant installation where exhaust vent equipment was not considered in sizing make-up requirements. This condition may result in air being back drafted by the restaurant exhaust equipment through the heater causing the draft proving switch to open and/or erratic heater shutdown.

•Down drafts can cause flue gases to spill into the installed space.

Servicing should only be performed by a Qualified Service Technician

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Contents For Models BCL Commercial GAS Water HeatersPage Table of Contents Qualifications Service WarningService Reminder IntroductionTools Required GAS Pressure Requirements Installation ConsiderationsGas and Electrical Characteristics Multiple Appliance InstallationsAIR Supply Contaminated AIR MAKE-UP AIR Direct Communication with OutdoorsThermal Expansion Power SupplyAIR Requirements Closed Water SystemsFeatures and Components Burner Replacement Blower and Burner AssemblyPage Flame Sensor Spark Igniter, Flame Sensor, Sight GlassSpark Igniter / Flame Sensor / Control Timing Spark IgniterBCL Venting Installation Venting Category and MaterialsVenting Minimum ClearancesExterior Clearances Type B GAS Vent Venting Tables Technical Venting DataSequence of Operation Operation and ServiceYES Sequence of Operation Flow ChartLighting and Operating Label For Your Safety Read Before OperatingComplaint Cause Remedy User Qualified Agency TroubleshootingPressure Switches All Models Controls Overview Control BOX AssemblyHigh Limit SWITCH/ Digital Thermostat Status Display Lights Digital Thermostat LED Indication ActionConditions Continuity Check of High Limit ECOThen Ohms Resistance Table Upper Temperature Probe Continuity CheckOhms Lower Temperature Probe Continuity Check Ignition Control Wiring Terminals DescriptionFailure to Light Lockout Start UP/ Flame RECOVERY/ Safety LockoutStart UP Heat Mode Flame FAILURE- Recycle ModeFlame Sensor Current Check Fault ConditionsTroubleshooting Guide for Ignition Control Internal Control FailureSW2 SW4 Used for UGB Blower Speed ControlPIN Connections PIN Number Description Wiring Diagram American Water Heaters

381T1546NOX, 395T1996NOX, BCL, 381T1206NOX, 395T2506NOX specifications

The American Water Heater Ultra Low NOx Series represents a significant advancement in water heating technology, aiming to meet stringent environmental regulations while delivering reliable hot water for residential applications. Models such as the 104,395T1806NOX, 395T2506NOX, 381T1206NOX, and BCL are designed to prioritize efficiency, performance, and compliance with the latest emission standards.

One of the defining features of the Ultra Low NOx Series is its innovative combustion technology. These water heaters utilize a state-of-the-art gas burner that dramatically reduces nitrogen oxide (NOx) emissions, ensuring compliance with local and federal regulations. This technology not only benefits the environment but also contributes to improved indoor air quality.

Efficiency is a hallmark of the Ultra Low NOx Series, with models designed to maximize energy savings while delivering consistent hot water. They feature a user-friendly, adjustable thermostat, providing homeowners with the ability to set their desired water temperature for optimal comfort. In addition, the insulation on these water heaters is designed to minimize heat loss, ensuring that energy consumption is kept to a minimum.

The Ultra Low NOx models are equipped with an easy-to-use digital control panel that allows homeowners to monitor and adjust settings with ease. This convenience is enhanced by advanced diagnostics, which provide real-time alerts regarding system performance and maintenance needs. This proactive approach helps extend the lifespan of the unit and enhances reliability.

Safety is another crucial characteristic of the Ultra Low NOx Series. Each model is equipped with safety features such as a flame rollout switch and a fully automatic gas shut-off, which ensure that the system operates safely under various conditions.

In terms of installation and maintenance, these models are designed with user-friendly features, making the process simpler for technicians. The compact design allows for flexible installation options, even in tighter spaces.

Overall, the American Water Heater Ultra Low NOx Series, including the 104,395T1806NOX, 395T2506NOX, 381T1206NOX, and BCL models, represents an excellent choice for homeowners seeking an efficient, reliable, and environmentally responsible water heating solution. With a focus on reducing emissions and enhancing performance, these models are built to meet the demands of today's conscientious consumers.
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