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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.
WHAT TO DO IF YOU SMELL GAS:
•
Do not try to light any appliance.
•
Do not touch any electrical switch; do
not use any phone in your building.
•
Immediately call your gas supplier
from a neighbor's phone. Follow the
gas supplier's instructions.
•
If you cannot reach your gas supplier,
call the fire department.
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.
KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE
WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.
COMMERCIAL GAS WATER HEATERS
Instruction Manual
•
For Your Safety
AN ODORANT IS ADDED TO THE GAS USED
BY THIS WATER HEATER.
1
INSTALLATION - OPERATION -
SERVICE - MAINTENANCE
Read and understand this instruction
manual and the safety messages
herein before installing, operating or
servicing this water heater.
Failure to follow these instructions and
safety messages could result in death
or serious injury.
This manual must remain with the
water heater.
•
100276483_2000538796
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Table of Contents
Related Manuals for A.O. Smith BT-100-LP
Summary of Contents for A.O. Smith BT-100-LP
- Page 1 Instruction Manual COMMERCIAL GAS WATER HEATERS INSTALLATION - OPERATION - SERVICE - MAINTENANCE 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.
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Page 2: Table Of Contents
TABLE OF CONTENTS SAFE INSTALLATION, USE AND SERVICE....3 Air From Other Indoor Spaces ........18 Venting ..............19 APPROVALS ..............3 Gas Piping ..............20 GENERAL SAFETY INFORMATION ......4 Sediment Traps ............22 INTRODUCTION ............5 TEMPERATURE REGULATION ........24 Abbreviations Used ........... 5 FOR YOUR INFORMATION .........25 Qualified Installer or Service Agency ...... -
Page 3: Safe Installation, Use And Service
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. -
Page 4: General Safety Information
GENERAL SAFETY INFORMATION CAUTION Improper installation, use and service may result in property damage. • Do not operate water heater if any part has been exposed to flooding or water damage. • Inspect anode rods regularly, replace when significantly depleted. •... -
Page 5: Introduction
INTRODUCTION Thank You for purchasing this water heater. Properly PREPARING FOR THE INSTALLATION installed and maintained, it should give you years of 1. Read the “General Safety” section, page 4 of this trouble free service. manual first and then the entire manual carefully. If you ABBREVIATIONS USED don’t follow the safety rules, the water heater will not operate properly. -
Page 6: Installation Considerations
INSTALLATION CONSIDERATIONS ROUGH-IN DIMENSIONS FIGURE 1. ROUGH-IN DIMENSIONS TABLE 1. DIMENSIONS AND RECOVERY RATINGS DIMENSIONS Model Units Inches 61 7/8 59 3/8 29 15/16 26 1/2 14 3/16 14 7/8 1 7/8 12.0 Natural & LP 157.2 150.8 67.3 10.2 39.4 40.6 30.5... -
Page 7: Thermometers (Not Supplied)
THERMOMETERS (NOT SUPPLIED) FACTS TO CONSIDER ABOUT THE LOCATION Thermometers should be obtained and field installed. Carefully choose an indoor location for the new water heater, because the placement is a very important Thermometers are installed in the system as a means of consideration for the safety of the occupants in the detecting the temperature of the outlet water supply. - Page 8 • Sensors mounted in the drain pan that trigger an The resulting flashback and fire can cause death or alarm or turn off the incoming water to the water serious burns to anyone in the area, as well as property heater when leakage is detected.
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Page 9: High Altitude
HIGH ALTITUDE FIGURE 2. AIR SHUTTER OPEN A correctly set burner should have a stable quiet flame. The flame will be blue with a well defined blue inner flame, Some yellow tipping is normal with LP gas. See Figure 3 Water heaters covered in this manual have been tested and approved for installation at elevations up to 7,700 feet (2,347 m) above sea level. -
Page 10: Clearances
FIGURE 6. UNSTABLE FLAME FIGURE 8. VENTILATION CLEARANCES If this water heater will be used in beauty shops, barber shops, cleaning establishments, or self-service CLEARANCES laundries with dry cleaning equipment, it is imperative that the water heater or water heaters be installed Minimum clearances between the water heater and so that combustion and ventilation air be taken from combustible construction are 0 inch at the sides and... -
Page 11: Hard Water
• DO NOT apply insulation to the top of the water CIRCULATING PUMP WIRING DIAGRAM STORAGE TANK OR BUILDING RECIRCULATION heater, as this will interfere with safe operation of the draft hood. See (page 20). Figure 18 FIELD SUPPLIED TEMPERATURE CONTROL INSTALLED IN THE STORAGE TANK •... -
Page 12: Installation Requirements
INSTALLATION REQUIREMENTS GAS SUPPLY SYSTEMS SUPPLY GAS REGULATOR Low pressure building gas supply systems are defined The maximum allowable gas supply pressure for this as those systems that cannot under any circumstances water heater is 14.0 inches W.C. (3.48 kPa). Install a exceed 14”... -
Page 13: Water Piping
shows the approximate time-to-burn relationship Table 3 for normal adult skin. If anyone using hot water provided by the water heater being installed fits into one of these groups or if there is a local code or state law requiring a certain water temperature at the point of use, then special precautions must be taken. -
Page 14: Temperature-Pressure Relief Valve
TEMPERATURE-PRESSURE RELIEF VALVE Explosion Hazard Temperature-Pressure Relief Valve must comply with ANSI Z21.22- CSA 4.4 and ASME code. Properly sized temperature- pressure relief valve must be installed in opening provided. Can result in overheating and excessive tank pressure. Can cause serious injury or death. This water heater is provided with a properly rated/ sized and certified combination temperature-pressure relief valve (T&P valve) by the manufacturer. -
Page 15: Filling The Water Heater
No valve or other obstruction is to be placed between the If, after manually operating the valve, it fails to completely temperature-pressure relief valve and the tank. Do not reset and continues to release water, immediately close connect discharge piping directly to the drain unless a the cold water inlet to the water heater, follow the draining 6”... -
Page 16: Air Requirements
AIR REQUIREMENTS UNUSUALLY TIGHT CONSTRUCTION In unconfined spaces in buildings, infiltration may be adequate to provide air for combustion, ventilation and dilution of flue gases. However, in buildings of unusually Breathing Hazard - Carbon Monoxide Gas tight construction (for example, weather stripping, heavily insulated, caulked, vapor barrier, etc.) additional air must Install water heater in accordance with be provided using the methods described in that follows. -
Page 17: Fresh Air Openings For Confined Spaces
OUTDOOR AIR THROUGH ONE OPENING and free area are not known, it shall be assumed that wood louvers will have 25% free area and metal louvers and grilles will have 75% free area. Non motorized louvers and grilles shall be fixed in the open position. FRESH AIR OPENINGS FOR CONFINED SPACES The following instructions shall be used to calculate the size, number and placement of openings providing fresh... -
Page 18: Outdoor Air Through Two Horizontal Ducts
OUTDOOR AIR THROUGH TWO HORIZONTAL DUCTS FIGURE 16. FRESH AIR FROM TWO VERTICAL DUCTS The confined space shall be provided with two permanent FIGURE 15. FRESH AIR FROM TWO HORIZONTAL DUCTS vertical ducts, one commencing within 12 inches (300 mm) of the top and one commencing within 12 inches The confined space shall be provided with two permanent (300 mm) of the bottom of the enclosure. -
Page 19: Venting
The confined space shall be provided with two permanent Such temperatures may not be high enough to properly openings, one commencing within 12 inches (300 mm) of open thermally operated vent dampers. This would the top and one commencing within 12 inches (300 mm) cause spillage of the flue gases and may cause carbon of the bottom of the enclosure. -
Page 20: Gas Piping
Be sure vent pipe is properly connected to prevent escape of dangerous flue gases which could cause Vent Draft Hood deadly asphyxiation. Draft Hood Screw Vent to outdoors or chimney Screw Top of Heater FIGURE 18. DRAFT HOOD ATTACHMENT 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). - Page 21 . The sizes shown are for straight lengths of pipe GAS SUPPLY LINE SIZES (IN INCHES)* MAXIMUM CAPACITY Table 5 OF PIPE IN CUBIC FEET PER HOUR at 0.5 in. W.C. pressure drop, which is considered normal for low pressure systems. Note: Fittings such as elbows, TABLE 4.
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Page 22: Sediment Traps
The water heater and its individual shut-off valve shall Contaminants in the gas lines may cause improper be disconnected from the gas supply piping system operation of the gas control valve that may result in fire or during any pressure testing of that system at test explosion. - Page 23 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 This appliance has a pilot which is lit by a piezo- Use only your hand to push in or turn the gas control knob.
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Page 24: Temperature Regulation
TEMPERATURE REGULATION Short repeated heating cycles caused by small hot water NOTE: uses can cause the temperature to exceed the thermostat The temperatures indicated are approximates. The actual setting by up to 30°F (16.7°C). If you experience this temperature of the heated water may vary. type of use you should consider using lower temperature STANDARD MODE settings to reduce scald hazards. -
Page 25: For Your Information
FOR YOUR INFORMATION START-UP CONDITIONS TABLE 6. INPUT CHECK TIME REQUIRED TO CONSUME 1 CU. FT. OF GAS DRAFT HOOD OPERATION BTU Per Approx. Time Required To Model Type of Gas Cu. Ft. Consume 1 Cu. Ft. of Gas Check draft hood operation by performing a worst case Natural 1050 50.3 sec. -
Page 26: Operational Conditions
SMOKE/ODOR Do not remove the anode leaving the tank unprotected. By doing so, all warranty on the water heater tank is It is not uncommon to experience a small amount of voided. smoke and odor during the initial start-up. This is due to burning off of oil from metal parts, and will disappear in a AIR IN HOT WATER FAUCETS short while. -
Page 27: Periodic Maintenance
PERIODIC MAINTENANCE VENTING SYSTEM INSPECTION BURNER INSPECTION Flood damage to a water heater may not be readily visible or immediately detectable. However, over a period of time a flooded water heater will create dangerous conditions which can cause DEATH, SERIOUS BODILY INJURY, OR PROPERTY DAMAGE. -
Page 28: Air Shutter Adjustment
AIR SHUTTER ADJUSTMENT ANODE ROD INSPECTION CAUTION If the installation is at a high elevation and the burner flame exhibits flame lifting and/or noise, do the following: Property Damage Hazard 1. Use a screw driver to loosen the air shutter screw. •... - Page 29 operation, make sure that (1) no one is in front of or around the outlet of the temperature-pressure relief valve discharge line, and (2) that the water discharge will not cause any property damage, as the water may be extremely hot. Use care when operating valve as the valve may be hot.
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Page 30: Periodic Removal Of Lime Deposits From Tank Type Commercial Water Heaters
PERIODIC REMOVAL OF LIME DEPOSITS FROM TANK TYPE COMMERCIAL WATER HEATERS The amount of calcium carbonate (lime) released from water is in direct proportion to water temperature and usage, see the chart ( . The higher the water Figure 25) temperature or water usage, the more lime deposits are dropped out of the water. -
Page 31: Deliming Using Flo-Jug Method
c. Remove six (6) hex head screws securing tank DELIME USING FLO-JUG METHOD cleanout plate and remove plate. 1. Slide the hose clamp over end of hose and slide d. Remove lime, scale, or sediment using care not to hose over the male adapter in the water heater drain damage the glass lining. -
Page 32: Draining And Flushing
DRAINING AND FLUSHING TO FLUSH THE WATER HEATER STORAGE TANK: 1. Ensure the cold water inlet valve is open. It is recommended that the water heater storage tank be drained and flushed every 6 months to reduce sediment 2. Open a nearby hot water faucet and let the water run buildup. -
Page 33: Leakage Test Points
LEAKAGE TEST POINTS 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. -
Page 34: Removing And Replacing The Gas Control Valve/Thermostat
Never use this water heater unless it is completely filled with water. To prevent damage to the tank, GAS CONTROL/ the tank must be filled with water. Water must flow TEMPERATURE KNOB from the hot water faucet before turning “ON” gas to the water heater. - Page 35 REPLACING THE GAS CONTROL VALVE/THERMOSTAT: 1. To replace the gas control valve/thermostat, reassemble in reverse order. When replacing the gas control valve/ thermostat, thread a 4” section of gas pipe into the inlet and use it to turn the gas control valve/thermostat (clockwise).
- Page 36 TABLE 7. STATUS LIGHT AND DIAGNOSTIC CODE TROUBLESHOOTING CHART LED Status Problem Corrective Action 0 FLASHES (LED NOT LIT) Pilot light is not lit or Thermopile has not yet Turn Gas Control Valve/Thermostat knob to OFF. Wait reached normal operating temperature. 10 minutes, then attempt to relight Pilot by following the lighting instructions on the water heater’s label.
- Page 37 TABLE 7. STATUS LIGHT AND DIAGNOSTIC CODE TROUBLESHOOTING CHART LED Status Problem Corrective Action 5 FLASHES The temperature sensor (thermistor) is defec- Turn Gas Control Valve/Thermostat knob to OFF. Turn tive. Main Gas Supply OFF. Replace the Gas Control Valve/ Thermostat.
- Page 38 TABLE 8. GENERAL TROUBLESHOOTING GUIDELINES These guidelines should be used by a qualified service agent. Symptom Problem Corrective Action Improperly sealed, hot or cold supply connection, relief Tighten threaded connections. valve, drain valve, or thermostat threads. WATER LEAKS Leakage from other appliances or water lines. Inspect other appliances near water heater.
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Page 39: Water Piping Diagrams
WATER PIPING DIAGRAMS... - Page 45 NOTES...
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Page 46: Commercial Water Heater 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 • Problems caused by improper: gas supply line sizing, gas type, our discretion, replace the defective water heater. venting, connections, combustion air, voltage, wiring, or fusing •...
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