Brochure

28
Heavy-Duty Oil-Fired
COF/COBT Models
Large Volume High Output Oil and
Dual Fuel Water Heaters
COF models offer oil fuel burners (No. 1 or 2 oil). COBT models
feature combination gas/oil powered burners for the versatility of
operating with natural gas/propane and No. 1 or 2 oil. COF/COBT
models include some of the largest and most powerful A. O. Smith
tank-type water heating systems available – with storage/input
options up to 600 gallons/2,500,000 BTU/hour and recoveries as
high as 2,424 gallons/hour at 100°F rise. All models feature fully
automatic controls with safety shutoff, two thermostats (upper
and lower) for accurate temperature control, and ASME tank
construction.
COF (Oil-Fired Models)
n
Use either No. 1 or 2 fuel oil
n
3450 rpm motor
n
Multi-annular fuel containment combustor head
n
Oil ignition transformer
n
Integral 2-stage fuel unit and oil safety valve
COBT (Combination Gas/Oil-Fired Models)
n
Use either natural gas or propane and No. 1 or 2 fuel oil
n
3450 rpm motor
n
Multi-annular fuel containment combustor head
n
Gas/electric pilot and gas ignition transformer
n
Pilot and main pressure regulators
n
Air safety switch
n
Manual fuel-selector switch
n
Integral two-stage fuel unit
Fully Automatic Controls With Safety Shutoff
n
High temperature limit control (manual reset)
n
CSA Certified and ASME rated T&P relief valve
n
Hinged-door control compartment for easy access
n
Upper and lower thermostats for accurate temperature control
Blue Diamond
®
Glass Lining
n
Blue Diamond coating provides superior corrosion resistance
compared to industry-standard glass lining
n
Equipped with multiple anode rods for additional corrosion
protection
Heavy-Duty Jacket
n
Heavy gauge steel jacket with baked powder-coated finish
for durability
n
Two 3˝ handhole inspection openings
Maximum Hydrostatic Working Pressures
n
All COF and COBT models: 160 PSI
Compliance
n
Meets the Thermal efficiency and standby loss requirements of
the U.S. Department of Energy and current edition of
ASHRAE/IESNA90.1
Professional Start-Up Service Included
n
Required for activating warranty and assuring quality
performance
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