Product Overview

A. O. Smith Corporation • 500 Tennessee Waltz Parkway • Ashland City, TN 37015 • 800-527-1953 Toll-free USA Page 2 of 2
www.hotwater.com Revised September 2014 AOSDG25500
Commercial Gas
Circulating Water Heater
Water Water Heater(s) shall be Model No. as manufactured by A. O. Smith, or an approved equal. Heater(s) shall be gas-fired, as certified by CSA International,
NSF capable of supplying GPH at 100°F temperature rise when equipped to burn gas, and bear the ASME code symbol. Heater(s) shall be reverse flow type
having all non-ferrous waterways, and employing a copper finned heat exchanger and a tightly wound copper coil combustion chamber. Water heater(s) shall be
equipped with an electric gas valve of the step-opening type, a 195° auto-reset fixed high limit control which will break the electric circuit on temperature rise,
intermittent electronic ignition with one (1) second shutdown in the event of pilot flame failure, a gas pressure regulator properly set for the gas to be supplied,
stainless steel main burners, and a coil limit switch for shutoff in event of excessive water temperature, thermal balancer (Models HW-200M and HW-225M), and
a certified draft diverter. Certified for combustible flooring. Outer jacket shall be of baked enamel finish. Fully illustrated instruction manual to be included. Coil,
heat exchanger and burner shall have a 5 year limited warranty as outlined in the written warranty.
Suggested Specification
For Technical Information and Automated Fax Service, call 800-527-1953. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice.
HEATER PERFORMANCE DATA
NOTE: To compensate for the effects of high altitude areas above 2,000 feet, input rating and therefore recovery ratings should be reduced approximately
4% for each 1,000 feet above sea level.
MODEL
INPUT RATING BTU/HR.
NAT. & PROPANE GAS
TEMPERATURE RISE - DEGREES F - GALLONS PER HOUR
40 50 60 70 80 90 100 110 120 130 140
HW-120M 120,000 300 240 200 171 150 133 120 109 100 92 86
HW-160M 160,000 385 308 257 220 193 171 154 140 128 118 110
HW-200M 199,000 487 389 324 278 243 216 195 177 162 150 139
HW-225M 225,000 Nat. Gas Only 543 434 362 310 271 241 217 197 181 167 155
Recovery rating of models shown in chart above are obtained by actual efficiency test data, by a recognized Certification Agency
BURKAY
®
ENERGY SAVING COPPER HEAT EXCHANGER
MODELS HWH-120 HWH-160 HWH-200 HWH-225
DIMENSIONS
Inches mm Inches mm Inches mm Inches mm
A
49 3/8 1254 50 1/8 1273 53 1/4 1353 60 1524
B
30 3/8 772 30 3/8 772 33 1/8 841 33 1/8 841
C
23 5/8 600 23 5/8 600 27 1/8 689 27 1/8 689
D
20 3/4 527 20 3/4 527 20 3/4 527 20 3/4 527
E
5 1/2 140 5 1/2 140 5 1/2 140 5 1/2 140
F
10 254 10 254 10 254 10 254
G
11 13/16 300 11 13/16 300 11 13/16 300 11 13/16 300
H
6 152 7 178 7 178 7 178
J
26 11/16 678 26 11/16 678 26 11/16 678 26 11/16 678
K
20 3/4 527 20 3/4 527 20 3/4 527 20 3/4 527
L
1 1/4 NPT 1 1/4 NPT 1 1/4 NPT 1 1/4 NPT
M
1 NPT 1 NPT 1 NPT 1 NPT
N
1/2 NPT 1/2 NPT 1/2 NPT 1/2 NPT
W
1 3/4 44 1 3/4 44 1 3/4 44 1 3/4 44
Approx. Shipping
Weight
120 lbs. 54 Kg. 155 lbs. 70 Kg. 165 Lbs. 75 Kg. 175 lbs. 79 Kg.
DIMENSIONS AND CAPACITY DATA
ROUGH-IN DIMENSIONS
AOSDG25500 Burkay HW120M Circulating Water Heater Spec.indd 2 9/17/14 7:05 PM