Instruction Manual ULTRA LOW NOX COMMERCIAL GAS WATER HEATERS MODELS BL-80/BL-100 Series 100 INSTALLATION - OPERATION - SERVICE - MAINTENANCE - LIMITED WARRANTY 500 Tennessee Waltz Parkway Ashland City, TN 37015 Low Lead Content WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
TABLE OF CONTENTS SAFE INSTALLATION, USE AND SERVICE...................... 3 Outdoor Air Through Two Horizontal Ducts................ 14 APPROVALS....................................................................... 3 Outdoor Air Through Two Vertical Ducts.................... 14 GENERAL SAFETY INFORMATION................................... 4 Air From Other Indoor Spaces................................... 14 INTRODUCTION................................................................. 5 Venting.....
SAFE INSTALLATION, USE AND SERVICE The proper installation, use and servicing of this water heater is extremely important to your safety and the safety of others. Many safety-related messages and instructions have been provided in this manual and on your own water heater to warn you and others of a potential injury hazard. Read and obey all safety messages and instructions throughout this manual.
GENERAL SAFETY INFORMATION 4
INTRODUCTION Thank You for purchasing this water heater. Properly installed and maintained, it should give you years of trouble free service. properly. It could cause DEATH, SERIOUS BODILY INJURY AND/OR PROPERTY DAMAGE. ABBREVIATIONS USED This manual contains instructions for the installation, operation, and maintenance of the gas-fired water heater. It also contains warnings throughout the manual that you must read and be aware of.
INSTALLATION CONSIDERATIONS ROUGH IN DIMENSIONS K HOT WATER OUTLET DRAFT HOOD TOP VIEW K COLD WATER INLET F H J TEMPERATURE AND PRESSURE RELIEF VALVE DRAIN VALVE D COLD HOT C G B A DRAIN VALVE L WATER HEATER CONTROL GAS INLET E M INSTALL IN ACCORDANCE WITH LOCAL CODES OUTER DOOR (BURNER ASSEMBLY BEHIND) FIGURE 1. TABLE 1. DIMENSIONS Model BL-100 Natural BL-80 Natural RECOVERY RATINGS Model INPUT RATE 75,100 BTU/H BL-100* 22 kW 75,100 BTU/H BL-80** 22 kW Units Inches CM A 70 1/2 179.
THERMOMETERS (Not Supplied) the structure. For this reason, it is not advisable to install water heater in an attic or upper floor. When such locations cannot be avoided, a suitable metal drain pan should be installed under the water heater. Metal Drain pans are available at your local hardware store. Such a metal drain pan must have a minimum length and width of at least 2” (51 mm) greater than water heater dimensions and must be piped to an adequate drain. The pan must not restrict combustion air flow.
CLEARANCES used in the same room or area containing a gas water heater or other open flame or spark producing appliance. NOTE: Flammable vapors may be drawn by air currents from other areas of the structure to the appliance. Minimum clearances between the water heater and combustible construction are 0 inch at the sides and rear, 4” (102 mm) for BL100 and 5” (127 mm) for BL-80 at the front, and 6” (153 mm) from the vent pipe. Clearance from the top of the jacket is 12” (305 mm).
INSULATION BLANKETS CIRCULATION PUMPS A circulating pump is used when a system requires a circulating loop or there is a storage tank used in conjunction with the water heater. See Water Piping Diagrams in this manual for installation location of circulating pumps. Breathing Hazard - Carbon Monoxide Gas See the Circulation Pump Wiring Diagrams below for electrical hookup information.
INSTALLATION REQUIREMENTS MIXING VALVES GAS SUPPLY SYSTEMS Low pressure building gas supply systems are defined as those systems that cannot under any circumstances exceed 14” W.C. (1/2 PSI Gauge). These systems do not require pressure regulation. Measurements should be taken to insure that gas pressures are stable and fall within the requirements stated on the water heater rating plate.
WATER PIPING WATER (POTABLE) HEATING AND SPACE HEATING This water heater shall not be connected to any heating systems or component(s) used with a non-potable water heating appliance. All piping components connected to this unit for space heating applications shall be suitable for use with potable water. Toxic chemicals, such as those used for boiler treatment shall not be introduced into this system.
NOTE: In addition to the factory installed Temperature-Pressure Relief Valve on the water heater, each remote storage tank that may be installed and piped to a water heating appliance must also have its own properly sized, rated and approved TemperaturePressure Relief Valve installed. Call the toll free technical support phone number listed on the back cover of this manual for technical assistance in sizing a Temperature-Pressure Relief Valve for remote storage tanks.
OUTDOOR AIR THROUGH TWO OPENINGS amount of combustion air can result in a fire or explosion and cause property damage, serious bodily injury or death. UNCONFINED SPACE An Unconfined Space is one whose volume is not less than 50 cubic feet per 1,000 Btu/hr (4.8 cubic meters per kW) of the total input rating of all appliances installed in the space.
OUTDOOR AIR THROUGH TWO HORIZONTAL DUCTS enclosure. The vertical ducts shall communicate directly with the outdoors. See Figure 11. Each duct opening shall have a minimum free area of 1 square inch per 4,000 Btu/hr (550 mm2 per kW) of the aggregate input rating of all appliances installed in the enclosure. When ducts are used, they shall be of the same cross sectional area as the free area of the openings to which they connect. The minimum dimension of rectangular air ducts shall be not less than 3 inches.
Water heaters covered in these instructions are Category I, Natural Draft appliances. If the water heater is being installed as a replacement for an existing heater in pre-existing venting, a thorough inspection of existing venting system must be performed prior to any installation work. The vent pipe from the water heater must be no less than the diameter of the draft hood outlet on the water heater and must slope upward at least 1/4 inch per linear foot (21 mm per meter). See Figure 14.
GAS PIPING TABLE 4. LENGTH IN METERS 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 3. 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. Note: Fittings such as elbows, tees and line regulators will add to the pipe pressure drop.
SEDIMENT TRAPS Contaminants in the gas lines may cause improper operation of the gas control valve that may result in fire or explosion. Before attaching the gas line be sure that all gas pipe is clean on the inside. To trap any dirt or foreign material in the gas supply line, a sediment trap must be incorporated in the piping. The sediment trap must be readily accessible. Install in accordance with the “Gas Piping” section. Refer to the current edition of the National Fuel Gas Code, ANSI Z223.
FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. FLAMMABLE BEFORE LIGHTING: ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED FROM ALL LINES A. This appliance has a pilot which is lit by a piezo- If you cannot reach your gas supplier, call the fire department. C. Use only your hand to push down or turn the gas electric spark gas ignition system.
TEMPERATURE REGULATION 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 30°F (16.7°C). If you experience this type of use you should consider using lower temperature settings to reduce scald hazards. Never allow small children to use a hot water tap, or to draw their own bath water. Never leave a child or handicapped person unattended in a bathtub or shower.
OPERATIONAL CONDITIONS CHECKING GAS INPUT With this heater in operation, determine whether it is receiving the full rated input of gas. This may be done by timing the gas meter and measuring gas pressure with a gauge or manometer. When the heater is operating at full capacity (full gas input) it should consume approximately 1 cubic foot of gas in the time shown in Table 5. SMELLY WATER In each water heater there is installed at least one anode rod for corrosion protection of the tank.
PERIODIC MAINTENANCE VENTING SYSTEM INSPECTION sooting can result in a fire causing death, serious injury, or property damage. Flame Characteristics Correct Flame Red/Orange FIGURE 19. Natural Gas (Low Nox) Burner Door Assembly Use brush on this surface Burner Pilot Assembly At least once a year a visual inspection should be made of the venting system. You should look for: 1. Obstructions which could cause improper venting. The combustion and ventilation air flow must not be obstructed. 2.
INSTALLED IN SUITABLE AREA: To insure sufficient ventilation and combustion air supply, proper clearances from the water heater must be maintained. See Facts to Consider About The Location section. Combustible materials such as clothing, cleaning materials, or flammable liquids, etc. must not be placed against or adjacent to the water heater which can cause a fire.
Lime accumulation not only reduces the life of the equipment but also reduces efficiency of the heater and increases fuel consumption. 1. Drain heater. 2. Remove outer cover plate from lower side of heater jacket. The usage of water softening equipment greatly reduces the hardness of the water. However, this equipment does not always remove all of the hardness (lime). For this reason it is recommended that a regular schedule for deliming be maintained. 3.
4. Put cap with male adapter back on the container and slide 3/4” hose over end of male adapter and fasten in place using hose clamp provided. 2. Ensure the cold water inlet valve is open. 3. Open a nearby hot water faucet and let the water run until the water is no longer hot. DELIME USING FLO-JUG METHOD 4. Close the cold water inlet valve to the water heater. 5. Connect a hose to the water heater drain valve and terminate it to an adequate drain. 6.
LEAKAGE CHECKPOINTS A. Water at the draft hood is water vapor which has condensed out of the combustion products. This is caused by a problem in the vent. Contact the gas utility. B. *Condensation may be seen on pipes in humid weather or pipe connections may be leaking. C. *The anode rod fitting may be leaking. D. Small amounts of water from temperature-pressure relief valve may be due to thermal expansion or high water pressure in your area. E.
TROUBLESHOOTING GUIDELINES These guidelines should be utilized by a qualified service agent. Problem WATER LEAKS LEAKING T&P VALVE SMELLY WATER PILOT WILL NOT LIGHT BURNER WILL NOT STAY LIT PILOT OUTAGE NOT ENOUGH HOT WATER WATER TOO HOT WATER HEATER SOUNDS SIZZLING OR RUMBLING SOOTING Cause Solution Improperly sealed, hot or cold supply connection, relief valve, drain valve, or thermostat threads. Tighten threaded connections. Leakage from other appliances or water lines.
COLD COLD WATER SUPPLY DRAIN TANK TEMPERATURE CONTROL CIRCULATING PUMP PRESSURE RELIEF VALVE TEMPERATURE & PRESSURE RELIEF VALVE EXPANSION TANK COLD For Technical Information and Automated Fax Service, call 800-527-1953 or visit www.hotwater.com. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice. NOTES: 1. Preferred piping diagram. 2.
COLD ALT. COLD WATER CONNECTION HOT WATER TO FIXTURES DRAIN EXPANSION TANK COLD WATER SUPPLY TANK TEMPERATURE CONTROL CIRCULATING PUMP PRESSURE RELIEF VALVE TEMPERATURE & PRESSURE RELIEF VALVE WATER FLOW SWITCH TEMPERATURE GAGE CHECK VALVE FULL PORT BALL VALVE AOSCG61140 | PAGE 1 of 1 HOT WATER RETURN FROM FIXTURES LEGEND For Technical Information and Automated Fax Service, call 800-527-1953 or visit www.hotwater.com. A. O.
COLD HOT WATER TO FIXTURES DRAIN TANK TEMPERATURE CONTROL CIRCULATING PUMP PRESSURE RELIEF VALVE For Technical Information and Automated Fax Service, call 800-527-1953 or visit www.hotwater.com. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice.
LINE TEMPERATURE CONTROL HOT WATER RETURN TEMPERED WATER RETURN TEMPERED WATER OUTLET PIPE T&P TO OPEN DRAIN MINIMUM 10´´ to 12´´ DRAIN For Technical Information and Automated Fax Service, call 800-527-1953 or visit www.hotwater.com. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice.
HOT COLD PIPE T&P TO OPEN DRAIN HOT COLD DRAIN EXPANSION TANK COLD WATER SUPPLY HOT WATER RETURN FROM FIXTURES TANK TEMPERATURE CONTROL CIRCULATING PUMP PRESSURE RELIEF VALVE TEMPERATURE & PRESSURE RELIEF VALVE WATER FLOW SWITCH TEMPERATURE GAGE CHECK VALVE FULL PORT BALL VALVE AOSCG61170 | PAGE 1 of 1 LEGEND For Technical Information and Automated Fax Service, call 800-527-1953 or visit www.hotwater.com. A. O.
FINISHED FLOOR PIPE T&P TO OPEN DRAIN HOT WATER TO FIXTURES HOT WARNING: THIS DRAWING SHOWS SUGGESTED PIPING CONFIGURATION AND OTHER DEVICES; CHECK WITH LOCAL CODES AND ORDINANCES FOR ADDITIONAL REQUIREMENTS.
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LIMITED WARRANTY COMMERCIAL WATER HEATER LIMITED WARRANTY EFFECTIVE WHAT'S NOT COVERED For 3 Years, in the event of a tank leak, we will repair or, at our • Problems caused by improper: gas supply line sizing, gas type, venting, connections, combustion air, voltage, wiring, or fusing For 1 Year, in the event of part failure, we will repair or, at our discretion, replace the defective part. • Failure to follow applicable codes discretion, replace the defective water heater.
500 Tennessee Waltz Pkwy., Ashland City, TN 37015 Technical Support: 800-527-1953 • Parts: 800-433-2545 www.hotwater.com Copyright © 2014 A. O. Smith Corporation, All rights reserved.
