Product Overview

Commercial Gas
Circulating Water Heater
BURKAY
®
ENERGY SAVING COPPER HEAT EXCHANGER
FEATURES
ALL NON-FERROUS WATERWAYS
■ Rustproof because water comes in contact with nothing but copper, brass or bronze
■ Copper transfers heat eight times faster than ferrous metals yet offer remarkable
structural strength without excessive weight
■ Free from the effects of thermal shock
EFFICIENT COPPER COIL COMBUSTION CHAMBER
■ Continuous coils of tightly wound copper tubing form a unique combustion chamber
■ Water circulating thru the coils, around the flame, captures radiant heat which may
otherwise be lost
HIGH EFFICIENCY STAINLESS STEEL BURNER
■ Developed especially for A. O. Smith water heaters using the very latest burner
principles
FORCED WATER CIRCULATION IMPROVES SYSTEM EFFICIENCY
■ Water moving at 2 to 4 feet per second helps to prevent lime buildup and also scrubs
extra heat from the copper coil combustion chamber
AUTOMATIC SAFETY CONTROLS AND ELECTRONIC IGNITION
■ Proven pilot ignition system provides flame failure response in less than one (1) second
■ Redundant high limit controls and gas valves assure safe shutoff in the event of
overheating or flame failure
■ Requires 120V 60Hz, maximum inlet gas pressure of 14” WC and activation of heater by
external temperature control
THERMAL BALANCER (HW-200M, HW-225M)
■ Patented thermal balancer functions as a pump shutoff delay switch
■ It allows the pump and heater to activate simultaneously but delays pump shut off for
120 ± 30 seconds after heater shuts down
■ This allows the high temperature water to clear the heater thus utilizing all heat that
had been generated plus educing the scale forming tendencies of motionless hot water
(Not to be used on booster recovery systems
PRESSURE RELIEF VALVE
■ 125 psi
MAIN BURNER REGULATION
■ Factory adjusted for gas required
JACKET
■ Prefinished with a bonderized coating followed by a baked on enamel finish.
CERTIFICATION
■ All models are design-certified by CSA International, according to ANSI Z21.10.3 - CSA
4.9 standards governing Circulating Water Heaters
■ Models are ASME certified and are design-certified by NSF International to NSF
Sanitation 5
■ Models meet the thermal efficiency and standby loss requirements of the U.S.
Department of Energy and current edition of ASHRAE/IESNA 90.1.
WORKING PRESSURE
■ 160 psi
LIMITED WARRANTY OUTLINE
■ If the coil, heat exchanger or burner should fail within 5 years, under the terms of
the warranty, then A. O. Smith will furnish a replacement part; installation, labor
handling and local delivery are extra. THIS OUTLINE IS NOT A WARRANTY. For complete
information, consult the written warranty or A. O. Smith.
HW-120M,
HW-160M,
HW-200M AND
HW-225M
A. O. Smith Corporation • 500 Tennessee Waltz Parkway • Ashland City, TN 37015 • 800-527-1953 Toll-free USA Page 1 of 2
www.hotwater.com Revised September 2014 AOSDG25500
Certified to
NSF/ANSI 61-G and 372
AOSDG25500 Burkay HW120M Circulating Water Heater Spec.indd 1 9/17/14 7:05 PM