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MODELS BTR 151 THRU 201/A
COMMERCIAL GAS, GLASS-LINED, TANK-TYPE WATER HEATER
• INSTALLATION • OPERATION • MAINTENANCE • LIMITED WARRANTY
Thank you for buying this energy efficient water heater from
A.O. Smith Water Products Company. We appreciate your
confidence in our products.
Printed in U.S.A. 1004
PLACE THESE INSTRUCTIONS ADJACENT TO HEATER
AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.
TEXT IN BLACK BOLD TYPE OR UNDERLINED CONTAINS
INFORMATION RELATIVE TO YOUR SAFETY. PLEASE READ
THOROUGHLY BEFORE INSTALLING AND USING THIS
APPLIANCE.
A DIVISION OF A. O. SMITH CORPORATION
McBEE, SOUTH CAROLINA, USA
www.aosmithwaterheaters.com
1
CAUTION
PART NO. 196308-001
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Related Manuals for A.O. Smith BTR 151 THRU 201/A
Summary of Contents for A.O. Smith BTR 151 THRU 201/A
- Page 1 COMMERCIAL GAS, GLASS-LINED, TANK-TYPE WATER HEATER • INSTALLATION • OPERATION • MAINTENANCE • LIMITED WARRANTY Thank you for buying this energy efficient water heater from A.O. Smith Water Products Company. We appreciate your confidence in our products. Printed in U.S.A. 1004 TEXT IN BLACK BOLD TYPE OR UNDERLINED CONTAINS INFORMATION RELATIVE TO YOUR SAFETY.
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Page 2: Rough-In-Dimensions
ROUGH-IN-DIMENSIONS Input Approx. Rate Tank Approx. Model Btuh Cap. BTR-151 150,000 NAT 32 Gal 44 kW/Hr. NAT 121 Litres BTR-151 150,000 LP 32 Gal 44 kW/Hr. LP 121 Litres BTR-201 199,900 NAT 32 Gal 59 kW/Hr. NAT 121 Litres BTR-201 182,000 LP 32 Gal 53 kW/Hr. -
Page 3: Table Of Contents
TABLE OF CONTENTS ROUGH-IN-DIMENSIONS ... 2 FOREWORD ... 2 GENERAL SAFETY INFORMATION ... 3 Precautions ... 3 Grounding Instructions ... 3 Chemical Vapor Corrosion ... 3 Improper Combustion ... 3-4 Extended Non-Use ... 4 Insulation Blankets ... 4 High Altitude Installation ... 4 FEATURES ... -
Page 4: Extended Non-Use
• Do not cover the instruction manual. Keep it on the side of the water heater or nearby for future reference. • Do obtain new labels from A.O. Smith for placement on the blanket directly over the existing labels. HIGH ALTITUDE INSTALLATIONS... -
Page 5: High Limit Switch
possibility of changing the orientation by accidentally overtightening the inlet supply. Improper orientation of the Eliminator may cause temperature buildup issues or spells of colder than usual water temperatures. HIGH LIMIT SWITCH The digital thermostat (see Figure 3) contains the high limit (energy cutoff) sensor. -
Page 6: Installation Instructions
INSTALLATION INSTRUCTIONS REQUIRED ABILITY INSTALLATION OR SERVICE OF THIS WATER HEATER REQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED TRADESMAN IN THE FIELD INVOLVED. PLUMBING, AIR SUPPLY, VENTING, GAS SUPPLY AND ELECTRICAL WORK ARE REQUIRED. WARNING FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN SERIOUS PERSONAL INJURY OR DEATH. -
Page 7: Venting
FIGURE 6 - ILLUSTRATION OF MINIMUM COMBUSTIBLE CLEARANCES IN AN ALCOVE CARBONING OR SOOTING OF THE COMBUSTION CHAMBER, BURNERS AND FLUE TUBES AND CREATES A RISK OF ASPHYXIATION. Where an exhaust fan is supplied in the same room with a heater, sufficient openings for air must be provided in the walls. -
Page 8: Multiple Heater Manifold
FIGURE 7 • Where a separate vent connection is not available and the vent pipe from the heater must be connected to a common vent with an oil burning furnace, the vent pipe should enter the smaller common vent or chimney at a point above the large vent pipe. -
Page 9: Gas Piping
GAS PIPING Contact your local gas service company to ensure that adequate gas service is available and to review applicable installation codes for your area. Size the main gas line in accordance with Table 2. The figures shown are for straight lengths of pipe at 0.5 in. W.C. pressure drop, which is considered normal for low pressure systems. -
Page 10: Heater Wiring
Do not subject the combination gas valve to inlet gas pressures of more than 14.0" W.C. - natural gas. A service regulator is necessary if higher gas pressures are encountered. Manifold gas pressure in inches of water column is 3.5. The gas pressure specified refers to flow pressure taken at pressure tap of automatic gas valve while heater is operating. -
Page 11: Installation Diagrams
INSTALLATION DIAGRAMS GENERAL The type, size and location of the relief valves must be in accordance with local codes. The locations of the relief valves shown in the installation diagrams are typical. The heater has a factory installed high temperature limit switch and temperature and pressure relief valve. - Page 12 VERTICAL STORAGE TANK AND FORCED CIRCULATION DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 20. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER SUPPLIED TO FIXTURES. HORIZONTAL STORAGE TANK AND FORCED CIRCULATION...
- Page 13 TWO TEMPERATURE - ONE HEATER HIGH TEMPERATURE STORAGE WITH RECIRCULATION OF SANITIZING LOOP NOTE 1: TOGGLE SWITCH CONTROLS 180°F (82°C) WATER CIRCULATION. INSTALL ON OR CLOSE TO DISHWASHING MACHINE. TOGGLE SWITCH MUST BE CLOSED (ON) DURING THE RINSE OPERATION AND OPEN (OFF) WHEN DISHWASHER IS NOT OPERATING OR WHEN ON LONG STANDBY.
- Page 14 TO PRE-HEATER INLET. FROM BOOSTED TEMPERATURE LOOP, IF USED CONNECT TO BOOSTER INLET. † AVAILABLE FROM A.O. SMITH. PIPE RELIEF VALVE TO OPEN DRAIN. INSTALL IN ACCORDANCE WITH LOCAL CODES. The discharge opening of the temperature and pressure relief valve must be piped to an open drain and should not be subject to freezing conditions.
- Page 15 ONE OR TWO TEMPERATURE - ONE HEATERS,HIGH TEMPERATURE STORAGE WITH OR WITHOUT RECIRCULATION HEATER WITH OR WITHOUT MIXING VALVE HEATER WITH MIXING VALVE AND RECIRCULATED SANITIZING LOOP NOTE 1: * PIPE RELIEF VALVE TO OPEN DRAIN. INSTALL IN ACCORDANCE WITH LOCAL CODES.
- Page 16 TWO TEMPERATURE - TWO PRE-HEATERS WITH MIXING VALVE OR BOOSTER HEATER WITH OR WITHOUT BUILING RECIRCULATION TWO PRE-HEATERS WITH MIXING VALVE DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE AT FIXTURES. SEE WATER TEMPERATURE CONTROL WARNING ON PAGE 20. IF HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD...
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Page 17: Vertical Storage Tank
MEDIUM TEMPERATURE - ONE HEATER WITH AUXILIARY STORAGE TANK FORCED CIRCULATION WITH OR WITHOUT BUILDING RECIRCULATION * PIPE RELIEF VALVE TO OPEN DRAIN. **WHEN USING AN A.O. SMITH T-140, -200, -350 OR -400 STORAGE TANK, USE LOWER 3/4” OPENING FOR TANK TEMPERATURE CONTROL. -
Page 18: Operation
OPERATION IMPORTANT A qualified person must perform the initial firing of the heater. At this time the user should not hesitate to ask the individual any questions which they may have in regard to the operation and maintenance of the unit. An Operational Checklist is included at the rear of this manual. -
Page 19: Lighting And Operation
FOR YOUR SAFETY READ BEFORE OPERATING IF YOU DO NOT FOLLOW THESE INSTRUCTIONS EXACTLY A FIRE OR EXPLOSION WARNING MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE. This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burner. -
Page 20: Water Temperature Control
WATER TEMPERATURE CONTROL DANGER THIS WATER HEATER IS EQUIPPED WITH AN ADJUSTABLE THERMOSTAT TO CONTROL WATER TEMPERATURE. HOT WATER TEMPERATURES REQUIRED FOR AUTOMATIC DISHWASHER AND LAUNDRY USE CAN CAUSE SCALD BURNS RESULTING IN SERIOUS PERSONAL INJURY AND/OR DEATH. THE TEMPERATURE AT WHICH INJURY OCCURS VARIES WITH THE PERSON'S AGE AND TIME OF EXPOSURE. -
Page 21: Main Burner
NOTE: Remove main burners from unit. Check that burner venturi and ports are free of foreign debris. Clean burners with bristle brush and/or vacuum cleaner - DO NOT distort burner ports or pilot location. Reinstall burners in unit. Make sure front and rear of burners are installed correctly in burner support brackets. -
Page 22: Relief Valve
RELIEF VALVE At least once a year, the temperature and pressure relief valve should be checked to ensure that it is in operating condition. Lift the lever at the top of the valve several times until the valve seats properly and operates freely. If the appliance installation includes other relief valves, such as in “remote”... -
Page 23: Deliming Solvents
BT-80 100 models. UN•LIME with the necessary hoses and fittings to delime your heater is also available as a kit: Up-N-Down Transfer Kit. Contact your local A.O. Smith dealer, distributor or, A.O. Smith Water Products Company: Telephone: (800) 433-2545 Fax: (800) 433-2515 Website: www.hotwater.com/parts... -
Page 24: Ignition Module System
Replacement parts may be ordered through A.O. Smith dealers, authorized servicers or distributors. Refer to the Yellow Pages for where to call or contact the A.O. Smith Water Products Company, Product Service Division, 5621 West 115th Street, Alsip, IL 60803, 1-800-433-2545. When ordering parts be sure to state... -
Page 25: Sequence Of Operation Flow Chart
SEQUENCE OF OPERATION FLOW CHART Description of this flow chart can be found in the “SEQUENCE OF OPERATION” section found on page 18. Switch power on to unit. Thermostat calls for heat. Ignition Control Board performs diagnostic check on components Ignition Control Board sends power to Exhaust Inducer... -
Page 26: Operational Checklist
This checklist in conjunction with “TROUBLESHOOTING” and the “SEQUENCE OF OPERATION” should be used as an on-the-job troubleshooting guide to identify the cause of incorrect system operation and suggest a remedy for its correction. Because improper piping and wiring can result in unsatisfactory system performance, it is suggested that the installation be examined before using the checklist. -
Page 27: Limited Warranty
A. O. Smith Corporation, the warrantor, extends the following LIMITED WARRANTY to the owner of this water heater. 1. THE TANK If the glass-lined tank in this water heater shall prove upon examination by the warrantor to have leaked due to natural corrosion from potable water therein, during the first THREE years after initial installation, the warrantor will supply a complete new A. - Page 28 A.O. SMITH WATER PRODUCTS COMPANY 5621 W. 115TH STREET • ALSIP, ILLINOIS 60803 PHONE: 1-800-433-2545 • FAX: 1-800-433-2515 www.aosmithwaterheaters.com • E-MAIL: parts@hotwater.com...