MODELS BTN-80 AND 100 Series 110/111 COMMERCIAL LOW NOx GAS WATER HEATER Glass-Lined Tank-type Water Heater • INSTALLATION • OPERATION • SERVICE • MAINTENANCE • LIMITED WARRANTY Low Lead Content Thank you for buying this energy efficient water heater from A. O. Smith Corporation. We appreciate your confidence in our products. CAUTION TEXT PRINTED OR OUTLINED IN RED CONTAINS INFORMATION RELATIVE TO YOUR SAFETY. PLEASE READ THOROUGHLY BEFORE INSTALLING AND USING THIS APPLIANCE.
ROUGH-IN DIMENSIONS TOP VIEW *INSTALL IN ACCORDANCE WITH LOCAL CODES FIGURE 1. TABLE 1, DIMENSIONS A B C D E F G H J K L M MODEL in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) in. (mm) in.
TABLE OF CONTENTS Page Page ROUGH-IN DIMENSIONS.............................................................. 2 FOREWORD.................................................................................. 2 GENERAL SAFETY INFORMATION Precautions................................................................................. 3 Grounding Instructions............................................................... 3 Chemical Vapor Corrosion..........................................................
INSULATION BLANKETS CANADIAN REQUIREMENTS Appliances with inputs up to and including 400,000 BTU (117.1kwh) must be factory equipped with orifices for operation at specific elevations. Standard (sea level) orifices permit operation up to 2000' (610m) elevation. For operation between 2000' (610m) and 4500' (1370m) specify "HIGH ALTITUDE OPERATION" when ordering the heater(s). For operation above 4500' (2370m) consult factory before ordering.
installed in a carpeted alcove or closet, the entire floor shall be covered by the panel. Also, see the drain requirements. WARNING ATTIC AND/OR EXHAUST FANS OPERATING ON THE PREMISES WITH A WATER HEATER CAN RESULT IN CARBON MONOXIDE POISONING AND DEATH. THIS HEATER SHALL BE LOCATED OR PROTECTED SO IT IS NOT SUBJECT TO PHYSICAL DAMAGE BY A MOVING VEHICLE.
VENTING WARNING THE INSTRUCTIONS IN THIS SECTION ON VENTING MUST BE FOLLOWED TO AVOID CHOKED COMBUSTION OR RECIRCULATION OF FLUE GASES. SUCH CONDITIONS CAUSE SOOTING OR RISKS OF FIRE AND ASPHYXIATION. Heater must be protected from freezing downdrafts. Remove all soot or other obstructions from the chimney that will retard a free draft. Type B venting is recommended with these heaters.
THERMOMETERS (Not Supplied) OR HEATER DAMAGE. NO VALVE IS TO BE PLACED BETWEEN THE RELIEF VALVE AND TANK. Thermometers should be obtained and field installed as shown in Figure 3. Your local code authority may have other specific relief valve requirements. Thermometers are installed in the system as a means of detecting the temperature of the outlet water supply. A DRAIN LINE MUST BE CONNECTED TO THE RELIEF VALVE TO DIRECT DISCHARGE TO A SAFE LOCATION TO AVOID SCALDING OR WATER DAMAGE.
HEATER WIRING All electrical work must be installed in the United States in accordance with the current edition of the National Electrical Code ANSI/NFPA No. 70, in Canada, with the current edition of Canadian Electrical Code CSA C22.1, must conform to all local code authority having jurisdiction. AN ELECTRICAL GROUND IS REQUIRED TO REDUCE RISK OF ELECTRICAL SHOCK OR POSSIBLE ELECTROCUTION.
TABLE 4. GAS SUPPLY LINE SIZES (IN INCHES)* MAXIMUM CAPACITY OF PIPE IN CUBIC FEET PER HOUR LENGTH IN FEET 10 20 30 40 50 60 70 80 90 100 125 150 175 200 LENGTH IN METERS 3.0 6.1 9.1 12.2 15.2 18.3 21.3 24.4 27.4 30.5 38.1 45.7 53.3 61.
FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. BEFORE OPERATING: ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED FROM ALL LINES. A. This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand. B. BEFORE OPERATING smell all around the appliance area for gas.
TEMPERATURE REGULATION SETTING THE WATER HEATER TEMPERATURE AT 120°F (49°C) (APPROX. " " MARK ON FACE OF THE TEMPERATURE ADJUSTING DIAL) WILL REDUCE THE RISK OF SCALDS. Some States or Provinces require settings at specific lower temperatures. Figure 6 shows the approximate water temperatures produced at various thermostat settings. Short repeated heating cycles caused by small hot water uses can cause temperatures at the point of use to exceed the thermostat setting by up to 20°F (11°C).
6. After it has been determined that each appliance connected to the venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas burning appliance to their previous conditions of use. 7. If improper venting is observed during any of the above tests, the venting system must be corrected. WARNING FAILURE TO CORRECT BACK DRAFTS MAY CAUSE AIR CONTAMINATION AND UNSAFE CONDITIONS.
PREVENTIVE MAINTENANCE BLOWER MAINTENANCE RECOMMENDED PROCEDURE FOR PERIODIC REMOVAL OF LIME DEPOSITS FROM TANK TYPE COMMERCIAL WATER HEATERS For safety and satisfactory operation it is recommended that the blower be checked once a year by a competent service person. 1. 2. 3. MOTOR - The motor is factory oiled and sealed and requires no further maintenance. WHEEL - Wheel must be clean of soot, ash or any other coating which inhibits either rotation or air flow.
TANK CLEANOUT PROCEDURE Figure 9 illustrates most of the following steps. The following practices will ensure longer life and enable the unit to operate at its designed efficiency: 1. Once a month the heater should be flushed. Open the drain valve and allow two gallons of water to drain from the heater. Inlet water valve should remain open to maintain pressure in tank. 2. A cleanout opening is provided for periodic cleaning of the tank. Gas must be shut off and heater drained before opening cleanout.
8. • 9. 2. When deliming has been completed, the heater should be flushed for 3 to 5 minutes with fresh water. Remove the deliming equipment, install the drain valve, open the cold water inlet line and allow water to flow through heater and out drain valve. Don’t forget to plug vent and cap opening in Flo-Jug. The apparent leakage might be condensation. In warm or humid locations, condensation can accumulate and run from within the heater or its piping.
TROUBLESHOOTING A hydrogen sulfide (rotten egg) odor may result if water contains high sulfate and/or minerals. Chlorinating the water supply should minimize the problem. (See EXTENDED NON-USE PERIODS). Water heaters may exhibit problems that are unrelated to a malfunction of the water heater itself. The following information and tables may serve to answer your question about a problem that you are having without having to call a service agent.
WARNING: DO NOT BY-PASS ANY CONTROLS TO MAKE HEATER OPERATE. OPERATE ONLY AS WIRED FROM FACTORY. TROUBLESHOOTING For your safety, water heater service should be performed only by a qualified service technician. Read the GENERAL SAFETY INFORMATION section first.
WARNING: DO NOT BY-PASS ANY CONTROLS TO MAKE HEATER OPERATE. OPERATE ONLY AS WIRED FROM FACTORY. TROUBLESHOOTING Please check guidelines below. For your safety, water heater service should be performed only by a qualified service technician. Read the GENERAL SAFETY INFORMATION section first. LED STATUS PROBLEM SOLUTION An open earth ground circuit to the 1. Check that the earth ground connection is ignition system. properly connected. 2.
Model BTN 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. O. Smith water heater of equivalent size and current model.
500 Tennessee Waltz Parkway, Ashland City, TN 37015 PHONE: 1-800-433-2545 FAX: 1-800-433-2515 www.hotwater.com email: parts@hotwater.
