TABLE OF CONTENTS

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Qualifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

INSTALLATION CONSIDERATIONS

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4

Gas AND ELECTRICAL CHARACTERISTICS .

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4

GAS PRESSURE – REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 FEATURES AND COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

BLOWER AND BURNER ASSEMBLY

. . . . 9

Spark Igniter, Flame Sensor, Sight Glass

. . . 11

Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

VENTING TABLES TECHNICAL VENTING DATA

. . . 14

OPERATION AND SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

SEQUENCE OF OPERATION – FLOW CHART

. . . 16

LIGHTING AND OPERATING LABEL . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

CONTROLS Overview - CONTROL BOX ASSEMBLY . . .

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19

Pressure Switches – All Models

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. 19

HIGH LIMIT SWITCH/ DIGITAL THERMOSTAT

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. 20

CONTINUITY CHECK OF HIGH LIMIT (ECO)

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22

UPPER TEMPERATURE PROBE CONTINUITY CHECK . . .

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. 23

LOWER TEMPERATURE PROBE CONTINUITY CHECK . . .

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. 24

IGNITION CONTROL

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. 25

START UP/ FLAME RECOVERY/ SAFETY LOCKOUT . . . .

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. 26

UGB – BLOWER SPEED CONTROL

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. 28

WIRING DIAGRAM

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. 29

Servicing should only be performed by a Qualified Service Technician

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American Water Heater 381T1546NOX, ULTRA LOW NOx SERIES 104, BCL, 381T1206NOX, 395T1806NOX, 395T1996NOX manual Table of Contents

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.