Features

Commercial Gas Water Heaters

MasterFit® Low Nox Commercial Gas Tank-Type Water Heaters

APPROVAL RATINGS AND CERTIFICATION

All models comply with ANSI Z21.10.3 CSA4.3

All models comply with ASHRAE/IES 90.1-2004

C.E.C. California Energy Commission

All models comply with Texas and So. California

SCAQMD Rule 1146.2

Eighty plus percentage thermal efﬁciency affords lower operating costs on most models.

INDUCED DRAFT BUILT-IN BLOWER - The blower is built into the top cover, factory mounted and wired. Ideal for installations where negative pressure is present in the building. Blower proves draft prior to ignition. No drafthood or barometric damper required.

METAL VENTING - Rated Category I Appliance. Uses standard metal single wall or double wall type “B” vent. Can be commonly vented with other Category I appliances. Vent connects directly to the blower outlet. Perfect choice for retroﬁt and upgrade installations.

WATER CONNECTIONS - For ease of installation, all BTNs feature water connections on the top, front, and rear.

GLASS LINED TANK - Permaglas® Ultracoat is the proprietary ceramic coating developed by A. O. Smith’s ceramic engineers speciﬁcally for the heater. It is applied after the complete tank has been assembled to give a seamless barrier against hot water corrosion. The maximum working pressure is 160 psi.

INSTALLED COST SAVINGS - When multiple BTN units are exclusively used in a vent manifold, use the National Flue Gas Code Table 11 Fan Sizing Charts to determine vent diameter and speciﬁcations. The BTN with its internal induced draft blower enables safe use of smaller vent diameters. This feature can save hundreds of dollars in installation costs.

FULLY AUTOMATIC DIGITAL CONTROLS WITH SAFETY SHUTOFF - Accurate, dependable control system. Manual reset gas shutoff device for added safety. Maximum inlet gas pressure is 14” W.C. Minimum gas pressure is 5.0” W.C. Natural Gas, 11” W.C. Propane.

FOAM INSULATION - Saves fuel, helps reduce standby heat loss.

JACKET- Heavy gauge steel ﬁnished with a baked enamel ﬁnish over a bonderized undercoat.

EASY CLEANING - Handhole cleanout allows access for easy cleaning.

FULLY TESTED FOR SAFETY AND PERFORMANCE - Design certiﬁed by the Underwriters Laboratory for 180°F hot water service. Meets rigid requirements of the National Sanitation Foundation when equipped with optional leg kit. Certiﬁed for use on combustible ﬂooring.

INTERMITTENT IGNITION DEVICE - Eliminates standing pilot. Provides ﬂame failure response in less than one second. Power ON/OFF switch.

EASY TO INSTALL - Completely factory-assembled. Only gas, water, vent and electric connections need be made. Provided with drain valve.

ANODES - CoreGuard™ long-life, stainless steel core anode rods.

PLUG KITS - Pipe nipples and caps are included to plug unused water connections.

MODELS

BTN

120-400(A)

Approved to NSF Standard 5 with option leg kit.

on selected models.

AOSCG10500

Revised September 2008

PG 1 OF 4

BTN 120-40D specifications

The A.O. Smith BTN 120-40D is a commercial-grade water heater designed for efficiency and reliability in various applications. Known for its robust performance, it offers a combination of advanced technologies and user-friendly features, making it a top choice for businesses and industries that require a consistent supply of hot water.

One of the standout features of the BTN 120-40D is its impressive heating capacity. With a storage tank that holds up to 120 gallons, this water heater can provide a high volume of hot water for restaurants, hotels, and other establishments that experience heavy usage. The design ensures a quick recovery rate, allowing it to keep pace with peak demands without any significant drops in temperature.

This unit is equipped with A.O. Smith's state-of-the-art control technology, which optimizes energy usage while maintaining set temperature levels. The intelligent diagnostics feature allows for real-time monitoring and alerts, helping to prevent issues before they arise. This predictive maintenance capability not only enhances efficiency but also extends the lifespan of the unit.

In terms of construction, the BTN 120-40D is built with high-quality materials to withstand the rigors of commercial use. Its robust tank is protected with a glass-lined coating, providing excellent corrosion resistance. Additionally, it has been designed with an insulation layer that minimizes heat loss, ensuring energy efficiency and reducing overall operational costs.

The water heater also comes with advanced safety features, including an adjustable thermostat and a combination temperature and pressure relief valve, which work together to maintain optimal performance and safety standards. The unit is compatible with both natural gas and propane, offering flexibility in fuel options.

Overall, the A.O. Smith BTN 120-40D exemplifies durability, efficiency, and cutting-edge technology. Its capacity to deliver large volumes of hot water, combined with smart features and high-quality materials, makes it an ideal solution for those requiring a dependable water heating system. Whether for commercial kitchens, laundries, or industrial processes, this model stands out as an investment in reliable performance and operational efficiency.