A.O. Smith BTL-120, BTL-154, BTL-180, BTL-199, BTL-250A User Manual

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Ultra-Low NOx Commercial Gas Water Heaters

MASTER-FIT® ULTRA-LOW NOx COMMERCIAL GAS WATER HEATERS

FAN ASSISTED COMBUSTION

• The blower is built into the low NOx burner assembly

• Complies with California SCAQMD Rule 1146.2 and other air quality management districts with similar NOx emission requirements of 14 ng/J or 20 ppm

AIR-FLAPPER

• A stainless steel air ﬂapper is used inside the premix system to replace externally mounted ﬂue damper to minimize the standby heat loss and to minimize the overall heater height

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

• An excellent choice for retroﬁt and upgrade installations

• When common venting multiple BTL water heaters into a common vent system, follow the common vent tables in the current edition of the National Fuel Gas Code book for Category 1, Fan assisted heaters.

WATER CONNECTIONS

• For ease of installation, all BTL’s feature water connections on the top, front, and back

• “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

GLASSLINED TANK

• Permaglas® Ultracoat is the proprietary ceramic coating developed by A. 0. Smith’s ceramic engineers speciﬁcally for the heater

• Glassing is applied after the complete tank has been assembled to give a seamless barrier against hot water corrosion

INSTALLED COST SAVINGS

• The BTL 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

• Manual reset gas shutoff device for added safety

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

• Spark ignitor and power ON/OFF switch

EASY TO INSTALL

• Completely factory-assembled

• Only gas, water, vent and electric connections need to 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

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/IES 90.1

3-YEAR LIMITED TANK / 1-YEAR LIMITED PARTS WARRANTY

• For complete warranty information, consult written warranty or go to howater.com.

MODELS

BTL-120 THRU BTL-400(A)

SERIES 200

ON SELECT MODELS

www.hotwater.com | 800-527-1953 Toll-Free USA | A. O. Smith Corporation | 500 Tennessee Waltz Parkway | Ashland City, TN 37015

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Ultra-Low NOx Commercial Gas Water Heaters

ROUGH IN DIMENSIONS: MASTER-FIT BTL-120 through BTL-400(A)

TOP OUTLET

1 1/2 NPT

FRONT VIEW BACK VIEW

TOP VIEW

TOP INLET

1 1/2 NPT

DIMENSIONS

Model Dimension

A 63-3/4 161.93 71-3/4 182.25 71-3/4 182.25

B 37 93.98 37 93.98 37 93.98

C 65 165.1 73 185.42 73 185.42

D 52-3/4 133.99 60-3/4 154.31 60-3/4 154.31

E 20-3/4 52.71 20-1/2 52.07 20-1/2 52.07

F 21 53.34 21 53.34 21 53.34

G 3/4 NPT

H 53 134.62 61 154.94 61 154.94

I 6 15.24 6 15.24 6 15.24

J 27-3/4 70.49 27-3/4 70.49 27-3/4 70.49

K 1-1/2 NPT

L 1-1/2 NPT

M N/A N/A 8 20.3 8 20.3

Approx. Shipping Weight

Standard 605 174 665 301 740 335

ASME N/A N/A 715 324 790 358

Dimensions and speciﬁcations subject to change without notice in accordance with our policy of continuous product improvement All models rated at 80% thermal efﬁciency “A” after the model number designates ASME construction. BTL models not available in LP gas.

BTL-120, 154, 180, 198 BTL-199, 250(A), 275(A) BTL-310(A), 366(A), 400(A)

Inches cm Inches cm Inches cm

BTL-120, 154, 180, 198 BTL-199, 250(A), 275(A) BTL-310(A), 366(A), 400(A)

lbs. kg lbs. kg lbs. kg

www.hotwater.com | 800-527-1953 Toll-Free USA | A. O. Smith Corporation | 500 Tennessee Waltz Parkway | Ashland City, TN 37015

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