Manufacturer |
N/A A. O. Smith® |
Equipment Grade |
N/A Commercial |
Input Power |
N/A 275000 KBTU/hr81 kW |
Capacity |
N/A 85 U.S. gal322 L |
Thermal Efficiency |
N/A 82 % |
Type |
N/A Natural Gas |
Minimum Gas Supply Pressure |
N/A 0.87 kPa15 inWc |
Maximum Gas Supply Pressure |
N/A 14 inWc3.48 kPa |
Sides and Rear Clearance to Combustibles |
N/A 0 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 |
Standard Approximate Shipping Weight |
N/A 850 lb386 kg |
ASME Approximate Shipping Weight |
N/A 900 lb408 kg |
Industry Standards |
N/A ANSI Z-21.10.3 - CSA 4.3 ASHRAE/IESNA 90.1 ASME Certified |
Schematic |
N/A
 Schematic Drawing for Master-Fit® Ultra-Low NOx Commercial Gas Water Heaters (BTL-275(A) to BTL-400(A)) |
Dimension A |
N/A 76 in193 cm |
Dimension B |
N/A 16-1/4 in41.2 cm |
Dimension C |
N/A 78-1/4 in198.8 cm |
Dimension D |
N/A 65-3/4 in167 cm |
Dimension E |
N/A 25-3/4 in65.4 cm |
Dimension F |
N/A 21 in53.3 cm |
Dimension G |
N/A 3/4 NPT |
Dimension H |
N/A 66-1/4 in168.3 cm |
Dimension I |
N/A 6 in15.2 cm |
Dimension J |
N/A 27-3/4 in70.5 cm |
Dimension K |
N/A 1-1/2 NPT |
Dimension L |
N/A 1-1/2 NPT |
Dimension M |
N/A 41 in104 cm |
Recovery at 36 ºF Temperature Rise |
N/A 754 gal/h |
Recovery at 40 ºF Temperature Rise |
N/A 678 gal/h1426 L/h |
Recovery at 50 ºF Temperature Rise |
N/A 543 gal/h |
Recovery at 54 ºF Temperature Rise |
N/A 502 gal/h |
Recovery at 60 ºF Temperature Rise |
N/A 452 gal/h |
Recovery at 70 ºF Temperature Rise |
N/A 388 gal/h |
Recovery at 72 ºF Temperature Rise |
N/A 377 gal/h |
Recovery at 90 ºF Temperature Rise |
N/A 339 gal/h |
Recovery at 100 ºF Temperature Rise |
N/A 271 gal/h |
Recovery at 108 ºF Temperature Rise |
N/A 251 gal/h |
Recovery at 110 ºF Temperature Rise |
N/A 247 gal/h |
Recovery at 120 ºF Temperature Rise |
N/A 226 gal/h |
Recovery at 126 ºF Temperature Rise |
N/A 215 gal/h |
Recovery at 130 ºF Temperature Rise |
N/A 209 gal/h |
Recovery at 140 ºF Temperature Rise |
N/A 194 gal/h |
Recovery at 20 ºC Temperature Rise |
N/A 2853 L/h |
Recovery at 22 ºC Temperature Rise |
N/A 2567 L/h |
Recovery at 28 ºC Temperature Rise |
N/A 2054 L/h |
Recovery at 30 ºC Temperature Rise |
N/A 1902 L/h |
Recovery at 33 ºC Temperature Rise |
N/A 1712 L/h |
Recovery at 39 ºC Temperature Rise |
N/A 1467 L/h |
Recovery at 50 ºC Temperature Rise |
N/A 1141 L/h |
Recovery at 56 ºC Temperature Rise |
N/A 1027 L/h |
Recovery at 60 ºC Temperature Rise |
N/A 951 L/h |
Recovery at 61 ºC Temperature Rise |
N/A 934 L/h |
Recovery at 67 ºC Temperature Rise |
N/A 856 L/h |
Recovery at 70 ºC Temperature Rise |
N/A 815 L/h |
Recovery at 72 ºC Temperature Rise |
N/A 790 L/h |
Recovery at 78 ºC Temperature Rise |
N/A 734 L/h |
Features |
N/A
82% thermal efficiency means lower operating costs. Fan Assisted Combustion - The blower is built into the Low NOx burner assembly for Ultra-Low NOx readings that comply with SCQAMD rule1146.2 of 14 ng/j or 20 ppm. Metal Venting - Rated Category I Appliance. Uses standard double wall type "B" vent. Can be commonly vented with other Category I appliances. Vent connects directly to the vent connector outlet. No Draft hood or barometric damper required. Perfect choice for retrofit and upgrade installations. Water Connections - For ease of installation, all BTLs feature water connections on the top, front, and rear. "The Eliminator™" inlet water connection eliminates harmful scale buildup, extending the life of the product. The front inlet connection must be used for the Eliminator™ benefits. 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. Installed Cost Savings - When multiple BTL units are exclusively used in a vent manifold, use the National Fuel Gas Code Table 13 Vent Sizing information to determine vent diameter and specifications. The BTL often uses a smaller vent diameter than a natural draft water heater which saves on installation cost. Fully Automatic Digital Controls with Safety Shutoff - Accurate, dependable control system. Features a two speed blower control for smooth main burner light-off. Manual reset gas shutoff device for added safety. Maximum inlet gas pressure is 14" W.C. Minimum gas pressure is 3.5" 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. Spark igniter and 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. |
Other Standard Features |
N/A
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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. NSF LEG Kit
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