A.O. Smith COF-245, COF-315A, COF-385A, COF-455A, COF-700A User Manual
CONSERVATIONIST® DURACLAD
OIL-FIRED TANK TYPE WATER HEATER
Commercial Oil-Fired
Water Heaters
MEETS THE THERMAL EFFICIENCY AND
STANDBY LOSS REQUIREMENTS OF THE
U.S. DEPARTMENT OF ENERGY AND
CURRENT EDITION ASHRAE/IESNA 90.1
LIME TAMER™ MODELS INHIBIT LIME
AND SEDIMENT BUILDUP
• Lime Tamer™ models are warranted against
tank failure due to sediment buildup for three
years.
GLASSLINED TANK
• Maximizes tank life. 160 psi working pressure.
180°F ADJUSTABLE THERMOSTAT
• Has upper and lower sensing bulbs to average
water temperatures at top and bottom of
heater for maximum temperature control
(120°-180°F).
SAFETY SHUTOFF
• Limits temperature buildup.
UL LISTED OIL BURNER
• Precision engineered to match the units they
are used with; designed to fire 1.75 to 5.0
gallons of oil per hour. All models equipped
with single phase continuous duty motor 120
volt AC60 Hz, 3450 rpm with manual overload
switch and interrupted ignition. Standard
burners equipped with single stage pump with
1 or 2 line capability. Flame retention principle
assures high rate of combustion efficiency, yet
maintains low operating noise levels. Fuel unit
includes pump, strainer, pressure regulating
valve and ignition transformer. Transformer
rated at 120 volt AC, 60 Hz with 10,000 volt
secondary, UL listed for use with No. 1 and
2 commercial grade fuel oil. Burner mounted
cadmium cell relay for flame detection - 15
second safety switch timing eliminates the need
for RA890F Electronic Safeguard. Complies with
UL A708.5-32/33.
EFFICIENT COMBUSTION CHAMBER
• Precast, high temperature combustion chamber
made of alumina silica ceramic fiber. Engineered
for maximum insulation and heat reflection.
Unique design assures more complete
combustion by stabilizing flame pattern.
INTERRUPTED IGNITION
• Reduces electrical consumption.
OIL SOLENOID SAFETY VALVE
• Standard on COF-455 and 700.
3/4” DRAIN VALVE
• Provided in lower tank for fast draining.
TWO HAND-HOLE CLEANOUTS
• Allows easy cleaning on standard models COF385 and larger and ASME models.
ANODIC PROTECTION
• For longer tank life.
FLAME OBSERVATION PORT
• Permits convenient flame check.
FOAM INSULATION
• Saves fuel, helps maintain constant
temperature.
JACKET
• Heavy gauge steel with baked enamel finish
over bonderized undercoat. Not approved for
installation on combustible flooring.
EASY TO INSTALL BURNER
• Three bolt mounting of burner assures easy
installation.
BAROMETRIC DRAFT REGULATOR
CSA CERTIFIED AND ASME RATED T&P
RELIEF VALVE
OTHER FEATURES
• Two Stage Pump - For use with underground oil
storage tanks or JP-5 fuel
• ASME construction available on select models
- All models are rated 160 psi max working
pressure
• CAUTION: Units must be installed on
noncombustible surface.
3-YEAR LIMITED TANK / 1-YEAR
LIMITED PARTS WARRANTY
• Factory Start-Up included - Required for
activating warranty and assuring maximum
operating performance. Contact your local sales
representative or Authorized Start-Up Agent to
arrange a FREE Certified Start-Up.
• For complete warranty information, consult
written warranty or go to hotwater.com.
MODELS COF-199 THROUGH COF-700(A)
© August 2015 A. O. Smith Corporation. All rights reserved.
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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AOSTO20000
Commercial Oil-Fired
Water Heaters
Model
Number
COF-199* 74-1/2 36-3/4 27-3/4 2 3/4 NPT 8 26-5/8 74-1/2 1-1/2 NPT 1-1/2 NPT 22-3/4 553 N/A
COF-245 74-1/2 36-3/4 27-3/4 2 3/4 NPT 8 26-5/8 74-1/2 1-1/2 NPT 1-1/2 NPT 22-3/4 554 N/A
COF-315 (A) 74-1/2 36-3/4 27-3/4 2 3/4 NPT 8 26-5/8 74-1/2 1-1/2 NPT 1-1/2 NPT 22-3/4 554 657
COF-385(A) 73-3/4 36-3/4 27-3/4 2 3/4 NPT 8 24-3/4 73-3/4 1-1/2 NPT 1-1/2 NPT 23-7/16 624 742
COF-455(A) 73-3/4 36-3/4 27-3/4 2 3/4 NPT 8 24-3/4 73-3/4 1-1/2 NPT 1-1/2 NPT 23-7/16 700 747
COF-700(A) 73-3/4 36-3/4 27-3/4 2 3/4 NPT 10 30-3/16 79-3/16 1-1/2 NPT 1-1/2 NPT 28-7/8 739 822
Model
Number
COF-199* 86 1.42 199,000 477 381 318 272 238 212 191 173 159 147 136 1/8
COF-245 86 1.75 245,000 587 469 391 335 293 261 235 213 196 181 168 1/8
COF-315(A) 84 2.25 315,000 754 604 503 431 377 335 302 274 251 232 216 1/8
COF-385(A) 75 2.75 385,000 922 738 615 527 461 410 369 335 307 284 263 1/8
COF-455(A) 75 3.25 455,000 1,090 872 727 623 545 484 436 396 363 335 311 1/8
COF-700(A) 69 5 700,000 1,677 1,341 1,118 958 838 745 671 610 559 516 479 1/8
Based on No. 2 fuel oil. Capacity rating are actual heater performance at 80% thermal efficiency.
NOTE: Above 2000’ altitude, input ratings should be reduced 4% for each 1000’ above sea level.
A B C D E F G H J K L Standard ASME
Firing
Rate
GPH
Input
BTU/
40 50 60 70 80 90 100 110 120 130 140
HR
Gallon
Capacity
Dimensions in Inches
Recovery Rate at °F Rise
Motor
HP
Model
Number
COF-199* 6 152.4
COF-245 8 203.2
COF-315(A) 8 203.2
COF-385(A) 8 203.2
COF-455(A) 8 203.2
COF-700(A) 10 254
*These models are factory supplied with a flue
reducer which should be installed on the top cover.
Approx. Shipping
Weight (lbs)
Vent Diameter
Inches Millimeters
SUGGESTED SPECIFICATION
Water heater(s) shall be commercial oil model number ___________ or equivalent. Heater(s) shall have a minimum oil firing rate of ___________ gph at
100°F temperature rise and a storage capacity of ___________ gallons. The 160 psi working pressure tank shall be glass-lined with the alkaline borosilicate
composition being fused to the steel at 1600°F and be equipped with 1 1/2” water inlet and outlet openings, and 2 3/4” x 3 3/4” boiler-type hand-hole
cleanout (2) on COF-315 and larger or ASME models. The tank shall be insulated with 2” fiber glass insulation. The outer jacket shall have baked enamel finish
over a bonderized undercoating. The burner shall be Underwriters’ Laboratories listed and have a ___________ (one or two) stage oil pump. The burner shall
have flame retention, interrupted ignition and be equipped with primary controls which will provide for 15 second safety shutdown in the event of flame failure.
The heater(s) shall be factory equipped with temperature limiting device, drain valve, flame observation port and 180°F adjustable thermostat having upper and
lower sensing bulbs which average the water temperatures at the top and bottom of the tank for maximum water temperature control. A CSA Certified and
ASME Rated T&P Relief Valve shall be furnished and installed by the factory. Heater tank shall have a 3 year limited warranty against corrosion and tank failure
due to sediment buildup as outlined in the warranty. Fully illustrated factory installation Manual.
For technical information, call 800-527-1953. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice.
© August 2015 A. O. Smith Corporation. All rights reserved.
www.hotwater.com | 800-527-1953 Toll-Free USA
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AOSTO20000
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