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Unit of Measure

Specifications

Manufacturer

 N/A A. O. Smith®

Sides and Rear Clearance to Combustibles

 N/A 1 in

Top Cover Clearance to Combustibles

 N/A 12 in

Sides and Rear Clearance to Non-Combustibles

 N/A 0 in

Top Cover Clearance to Non-Combustibles

 N/A 12 in

Top Inlet Water Connection

 N/A 1-1/2 in

Front Inlet Water Connection

 N/A 1-1/2 in

Back Inlet Water Connection

 N/A 1-1/2 in

Top Outlet Water Connection

 N/A 1-1/2 in

Front Outlet Water Connection

 N/A 1-1/2 in

Back Outlet Water Connection

 N/A 1-1/2 in

Maximum Gas Supply Pressure

 N/A 14 inWc

Minimum Gas Supply Pressure

 N/A 5.2 inWc

Manifold Pressure

 N/A 3.5 inWc

Approximate Tank Capacity

 N/A 100 gal

Type

 N/A Natural Gas

Input Rating

 N/A 180000 BTU/hr

Standard Approximate Shipping Weight

 N/A 550 lb

Industry Standards

 N/A ANSI Z-21.10.3 - CSA 4.3 ASHRAE/IESNA 90.1 ASME Certified

Electrical Characteristics

AC Voltage

 N/A 120 V

Current

 N/A 5 A

Dimensions

Schematic

 N/A
Schematic Drawing for Master-Fit® Plus Induced Draft Low NOx Commercial Gas Tank-Type Water Heaters

Dimension A

 N/A 72 in

Dimension B

 N/A 4-1/2 in

Dimension C

 N/A 70-7/8 in

Dimension D

 N/A 61-5/8 in

Dimension E

 N/A 20-1/2 in

Dimension F

 N/A 21 in

Dimension G

 N/A 3/4 in

Dimension H

 N/A 61 in

Dimension I

 N/A 6 in

Dimension J

 N/A 27-3/4 in

Maximum Recovery (ºF)

Recovery at 40 ºF Temperature Rise

 N/A 432 gal/h

Recovery at 50 ºF Temperature Rise

 N/A 345 gal/h

Recovery at 60 ºF Temperature Rise

 N/A 289 gal/h

Recovery at 70 ºF Temperature Rise

 N/A 247 gal/h

Recovery at 80 ºF Temperature Rise

 N/A 218 gal/h

Recovery at 90 ºF Temperature Rise

 N/A 192 gal/h

Recovery at 100 ºF Temperature Rise

 N/A 173 gal/h

Recovery at 110 ºF Temperature Rise

 N/A 157 gal/h

Recovery at 120 ºF Temperature Rise

 N/A 144 gal/h

Recovery at 130 ºF Temperature Rise

 N/A 133 gal/h

Recovery at 140 ºF Temperature Rise

 N/A 123 gal/h

Options

Options

 N/A
  • Manifold kits for multiple heater installations
  • Meets NSF Standard 5 with optional leg kit

Features

Features

 N/A 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 draft hood 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.

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 Fuel Gas Code Table 13 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 5.2” W.C. Natural Gas.

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.

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 - CoreGard™ long-life, stainless steel core anode rods.

Plug Kits - Pipe nipples and caps are included to plug unused water connections.
  • Equipped with gas pressure regulator and pilot filter.
  • Integral automatic gas shutoff system prevents excessive water temperature.
  • CSA® Certified and ASME Rated T&P Relief valve are factory-installed.
  • Maximum working pressure is 160 psi standard.
  • Cathodic protection.
  • Adjustable thermostat with a 120 to 180 ºF range.

Testing and Certifications

Testing and Certifications

 N/A 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.

Approval Ratings And Certification - All models meet ANSI Z21.10.3 - CSA® 4.3 standards and the thermal efficiency and standby loss requirements of the U.S. Department of Energy and current edition of ASHRAE/IESNA 90.1. Models also comply with California Energy Commission (CEC) and Texas low NOx and Air Quality Management Districts with requirements of less than 40 ng/j.

BTN199C Models are available for sale in California only.

Note

Note

 N/A All dimensions are in inches

+BTN120 is approved for 5" vent using a 6 x 5 reducer.