A.O. Smith BTN154, BTN180, BTN199C, BTN199, BTN200A User Manual

®

Commercial Gas Water Heaters

MasterFit® Low NOx Commercial Gas Tank-Type
Water Heaters

FEATURES

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

INDUCED DRAFT BUILT-IN BLOWER

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.

GLASSLINED 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.

- The blower is built into the top cover, factory

MODELS

BTN

120-400(A)

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

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

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.

Low Lead Content

Approved to NSF Standard 5
with option leg kit.

AOSCG10500

Revised October 2012 PG 1 OF 4

®

Commercial Gas Water Heaters

OTHER FEATURES

• 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 120-180°F range.

• THREE YEAR LIMITED TANK WARRANTY – For complete warranty information, consult written warranty or contact A. O. Smith.

OPTIONS

• Manifold kits for multiple heater installations.

• Meets NSF Standard 5 with optional leg kit.

BTN DIA-SCAN™ CONTROLS

The A.O. Smith BTN models feature true self diagnostic controls in a digital solid state design. These advanced control aid in both the
installation and maintenance of the BTN water heater. The White Rogers Silicon Nitride Hot Surface Ignitor ensures rugged reliability and
years of trouble free operation.

Digital Temperature Control

Solid State Ignition Control

Solid State Temperature Probe

Silicon Nitride Hot Surface Ignitor

Digital Temperature Control

• Accuracy to within ± 2°F

• Power On/Standby Indicator

• ECO Open Indicator

• Reset Status Indicator

• Heating-Mode Indicator

Solid State Ignition Control

• Power On/Standby Indicator

• Gas Valve Circuit Monitor

• Reverse Polarity Indicator

• Improper Grounding Error Indicator

• Lock Out Condition Indicator with Auto Retry

• Low Gas Pressure & Blower Prover Indicator

• Weak Flame Sense Indicator

• Combustion Operation Indicator

• Call for Heat Indicator

Solid State Temperature Probe

• Solid State Thermistor Technology

• Plus or minus 2°Fahrenheit

• Direct immersion package

Silicon Nitride Hot Surface Ignitor

• Rugged

• Dependable

• Separate Flame Prover Rod

• Quick connect terminals

• Adaptive learning technology extends ignitor life

Revised October 2012

www.hotwater.com

PG 2 OF 4

AOSCG10500