A.O. Smith BTN 120-40D Specification Sheet

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
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
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.
FULLY TESTED FOR SAFETY AND PERFORMANCE
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
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
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.
Revised April 2012
Commercial Gas Water Heaters
®
- The blower is built into the top cover, factory
- When multiple BTN units are exclusively used in a vent
- Design certified by the
- Eliminates standing pilot. Provides flame failure
- All models meet ANSI Z21.10.3 - CSA 4.3
120-400(A)
- Accurate,
MODELS
BTN
Low Lead Content
Approved to NSF Standard 5
with option leg kit.
on selected models.
AOSCG10500
PG 1 OF 4