A.O. Smith BTX-80 SERIES 100 Instruction Manual

A.O. Smith BTX-80 SERIES 100 Instruction Manual

Series 100 commercial gas water heaters, power vented gas models w/hot surface ignition
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500 Tennessee Waltz Parkway
Ashland City, TN 37015
Low Lead Content
all technIcal and warrantY questIons: SHOULD BE DIRECTED TO THE LOCAL DEALER FROM WHOM THE WATER HEATER WAS
PURCHASED. IF YOU ARE UNSUCCESSFUL, PLEASE WRITE TO THE COMPANY LISTED ON THE RATING PLATE ON THE WATER HEATER.
PRINTED 0810
coMMercIal Gas water heaters
Keep thIs Manual In the pocKet on heater for future reference
whenever MaIntenance adjustMent or servIce Is requIred.
power vented Gas Models w/hot surface IGnItIon
Model BtX-80 serIes 100

for Your safety

AN ODORANT IS ADDED TO THE GAS USED
BY THIS WATER HEATER.
1

Instruction Manual

197086-004

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Summary of Contents for A.O. Smith BTX-80 SERIES 100

  • Page 1: Instruction Manual

    Instruction Manual coMMercIal Gas water heaters power vented Gas Models w/hot surface IGnItIon Model BtX-80 serIes 100 500 Tennessee Waltz Parkway Ashland City, TN 37015 Low Lead Content • • for Your safety AN ODORANT IS ADDED TO THE GAS USED BY THIS WATER HEATER.
  • Page 2: 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 3: General Safety Information

    General safetY InforMatIon...
  • Page 4 General safetY InforMatIon at least 18" (45.7 cm) above the floor. This will reduce, but not eliminate, the risk...
  • Page 5: Table Of Contents

    taBle of contents SAFE INSTALLATION, USE AND SERVICE........2 Filling the Water Heater .............. 18 APPROVALS ..................2 Vent Pipe Assembly ..............19 GENERAL SAFETY INFORMATION ..........3-4 Venting ..................19 TABLE OF CONTENTS ................ 5 Vent Pipe Termination ..............20 INTRODUCTION ..................
  • Page 6: Installation Requirements For The Commonwealth Of Massachusetts

    InstallatIon requIreMents for the coMMonwealth of Massachusetts coMMonwealth of Massachusetts InspectIon The state or local gas inspector of the side wall horizontally For all side wall terminated, horizontally vented power vent, direct vented gas fueled equipment shall not approve the installation vent, and power direct vent gas fueled water heaters installed in unless, upon inspection, the inspector observes carbon monoxide every dwelling, building or structure used in whole or in part for...
  • Page 7: Typical Installation

    tYpIcal InstallatIon Get to Know Your water heater - Gas Models a vent pipe Bushing q rating plate B anode nipple r Insulation c hot water outlet condensate tee vent terminal D Outlet (120 VAC) adapter drain valve f Gas supply Igniter and Main Burner ll plug G Main Manual Gas shut off valve...
  • Page 8 tYpIcal InstallatIon condensate hose and draIn pan FIGURE 1 (continued).
  • Page 9 tYpIcal InstallatIon MIXInG valve / therMal eXpansIon tanK usaGe and space heatInG fIGure 2. MIXInG valves Mixing valves are available at plumbing supply stores. Consult a Qualified Installer or Service Agency. Follow mixing valve manufacturer’s instructions for installation of the valves. DANGER taBle 1. Water temperature over 125°F (52°C) can cause severe burns instantly Time to Produce 2nd &...
  • Page 10: Rough In Dimensions

    rouGh-In-dIMensIons rough-In-dimensions Top/Side Inlet and Outlet: 3/4” NPT Gas Inlet: 1/2” NPT capacity and Gas and electrical characteristics All models - Maximum Supply Pressure: 14 inches W.C. (3.48kPa) Minimum Supply Pressure Natural Gas: 5.0 inches W.C. (1.24kPa) Minimum Pressure must be maintained under both load and no load (static and dynamic) conditions. recovery capacities - u.s. Gallons/hr. and liters/hr. at temperature rise Indicated Recovery capacity based on 90% thermal efficiency.
  • Page 11: Locating The New Water Heater

    locatInG the new water heater facts to consIder aBout the locatIon Carefully choose an indoor location for the new water heater, because the placement is a very important consideration for the safety of the occupants in the building and for the most economical use of the appliance.
  • Page 12: Insulation Blankets

    in an alcove or closet, the entire floor must be covered by the panel. If this water heater will be used in beauty shops, barber shops, cleaning establishments, or self-service laundries with dry cleaning Failure to heed this warning may result in a fire hazard. equipment, it is imperative that the water heater or water heaters be installed so that combustion and ventilation air be taken from outside these areas.
  • Page 13: Unconfined Space

    Such a condition often will result in a yellow, luminous burner free area and metal louvers and grilles will have 75% free area. Non flame, causing sooting of the combustion chamber, burners and motorized louvers and grilles shall be fixed in the open position. flue tubes and creates a risk of asphyxiation. fresh aIr openInGs for confIned spaces Do not install the water heater in a confined space unless an adequate supply of air for combustion and ventilation is brought in...
  • Page 14: Outdoor Air Through Horizontal And Vertical Ducts

    Figure 7. The water heater shall have clearances of at least 1 inch The confined space shall be provided with two permanent vertical (25 mm) from the sides and back and 6 inches (150 mm) from the ducts, one commencing within 12 inches (300 mm) of the top and front of the appliance. The opening shall directly communicate with one commencing within 12 inches (300 mm) of the bottom of the the outdoors or shall communicate through a vertical or horizontal duct enclosure.
  • Page 15: Installing The New Water Heater

    InstallInG the new water heater cheMIcal vapor corrosIon This water heater should not be connected to any heating systems or component(s) used with a non-potable water heating appliance. CORROSION OF THE FLUEWAYS AND VENT SYSTEM MAY All piping components connected to this unit for space heating OCCUR IF AIR FOR COMBUSTION CONTAINS CERTAIN CHEMICAL applications should be suitable for use with potable water.
  • Page 16: Thermal Expansion

    therMal eXpansIon As water is heated, it expands (thermal expansion). In a closed system the volume of water will grow when it is heated. As the volume of water grows there will be a corresponding increase in water pressure due to thermal expansion. Thermal expansion can cause premature tank failure (leakage). This type of failure is not covered under the limited warranty. Thermal expansion can also cause intermittent Temperature- Pressure Relief Valve operation: water discharged from valve due to excessive pressure build up.
  • Page 17: Temperature-Pressure Relief Valve

    hIGh altItude InstallatIon discharge opening must not be blocked or reduced in size under any circumstances. Excessive length, over 30 feet (9.14 m), or use of more than four elbows can cause restriction and reduce the discharge capacity of the valve. No valve or other obstruction is to be placed between the Temperature-Pressure Relief Valve and the tank.
  • Page 18: Sediment Traps

    sedIMent traps A gas line of sufficient size must be run to the water heater. Consult the current edition of National Fuel Gas Code (ANSI Z223.1/NFPA 54) or the Natural Gas and Propane Installation Code (CAN/CSA B149.1) and your gas supplier concerning pipe size. There must be: • A readily accessible manual shut off valve in the gas supply line serving the water heater, and • A drip leg (sediment trap) ahead of gas control valve to help prevent dirt and foreign materials from entering the gas control valve. • A flexible gas connector or a ground joint union between the shut off valve and control valve to permit servicing of the unit. Be sure to check all the gas piping for leaks before lighting the water heater. Use a soapy water solution, not a match or open flame. Rinse off soapy solution and wipe dry.
  • Page 19: Vent Pipe Assembly

    Never use this water heater unless it is completely full of water. To should be approximately 0.25” (0.64 cm), see Figure 16. Disassemble prevent damage to the tank, the tank must be filled with water. Water the parts and cement back together using the alignment marks. After must flow from the hot water faucet before turning “ON” gas to the the cement dries, attach the assembly to the blower and the water water heater.
  • Page 20: Vent Pipe Termination

    terMInatIon clearances sIdewall power vent POWER VENT (using room air for combustion) EXTERIOR CLEARANCES FOR SIDEWALL VENT TERMINATION F IX E D C L O S E D O P E R A B L F IX E D C L O S E D O P E R A B L VENT TERMINAL AIR SUPPLY INLET...
  • Page 21: Planning The Vent System

    plannInG the vent sYsteM venting system must be performed prior to any installation work. Verify that correct material as detailed above has been used, and that minimum or maximum vent lengths and terminal location as detailed in this manual Plan the route of the vent system from the discharge of the blower have been met.
  • Page 22: Condensate

    The condensate trap may be primed by filling the CONDENSATE 6. Make sure the ON/OFF switch is in the OFF position and that U-ASSEMBLY with tap water while the water heater is not operating. the outer harness is connected from the blower control box to The system is fully primed when the water level reaches the adaptor the connector on the bottom side of the gas valve.
  • Page 23 may be easier to mark both the inside and outside wall. Align holes by bead of caulking (not supplied) around the gap between the pipe and drilling a hole through center of the template from the inside through to cover plate. Apply enough to fill some of the gap between the pipe and wall. Place some of the caulking on the back of the plate to hold it the outside.
  • Page 24: Installation Of Vent System, Sidewall

    InstallatIon of vent sYsteM, sIdewall additional vent pipe when calculating maximum equivalent feet of venting. With the route of the venting system and selection of materials completed, as discussed in the section of this manual titled PLANNING THE VENT InstallatIon of vertIcal vent sYsteM SYSTEM, the through the wall vent terminal in place and the first section of piping, up to first elbow, installed at the blower it is time to complete the A proper flashing or “BOOT” should be used to seal the pipe...
  • Page 25: Vent Attenuation Assembly Installation Instructions

    vent attenuatIon asseMBlY 4. Make sure the VAA and vent pipe is supported securely to a permanent fixture (stud or wall). Use standard support InstallatIon InstructIons straps (not supplied with kit) that may be found at a local hardware store. Failure to properly support the VAA and the The Vent Attenuation Assembly (VAA) is designed to provide a surrounding vent pipe could create a hazardous situation.
  • Page 26 barb, use a wire tie or hose clamp (not supplied with kit) and secure. 6. Take the other end of the flexible tubing and slide it through the hose clamp on the jacket top cover and install it into one of the four barb fittings in vent pipe assembly #2.
  • Page 27: Vent Pipe Preparation

    vent pIpe preparatIon prIMer It is recommended that Tetrahydrofuran (THF) be used to prepare the 1. InItIal preparatIon surfaces of pipe and fittings for solvent welding. Do not use water, rags, gasoline or any other substitutes for cleaning PVC or CPVC Make sure the solvent cement you are planning to use is surfaces. A chemical cleaner such as MEK may be used. designed for the specific application you are attempting.
  • Page 28 B. deburring Use a knife, plastic pipe deburring tool, or file to remove burrs from the end of small diameter pipe. Be sure to remove all burrs from around the inside as well as the outside of the pipe. A slight chamfer (bevel) of about 10°-15° should be added to the end to permit easier insertion of the pipe into the end of the fitting. Failure to chamfer the edge of the pipe may remove cement from the fitting socket, causing the joint to leak. step e f. joint assembly Working quickly, insert the pipe into the fitting socket bottom and step B give the pipe or fitting a 1/4 turn to evenly distribute the cement. Do not continue to rotate the pipe after it has hit the bottom of the C.
  • Page 29: Lighting & Operating Label

    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.
  • Page 30: Temperature Regulation

    teMperature reGulatIon To avoid any unintentional changes in water temperature settings, the It is recommended that lower water temperatures be used to avoid control has a tamper resistant feature for changing the temperature the risk of scalding. It is further recommended, in all cases, that the setting.
  • Page 31: For Your Information

    for Your InforMatIon start up condItIons If the smelly water persists after the anode replacement and chlorination treatment, we can only suggest that chlorination or aeration of the water supply be considered to eliminate the water problem. sMoKe/odor It is not uncommon to experience a small amount of smoke and odor do not remove the anode leaving the tank unprotected.
  • Page 32: Periodic Maintenance

    perIodIc MaIntenance ventInG sYsteM InspectIon Soot build-up indicates a problem that requires correction before further use. Turn “OFF” gas to water heater and leave off until repairs are made, because failure to correct the cause of the sooting can result in a fire causing death, serious injury, or property damage. fIGure 27. Burner cleanInG In the event your burner or burner air openings require cleaning, turn the blower switch to the “OFF” position and allow the burner to cool.
  • Page 33: Temperature-Pressure Relief Valve Test

    The anode rod is used to protect the tank from corrosion. Most hot water tanks are equipped with an anode rod. The submerged rod sacrifices itself to protect the tank. Instead of corroding tank, water ions attack and eat away the anode rod. This does not affect water’s taste or color. The rod must be maintained to keep tank in operating condition. Explosion Hazard Anode deterioration depends on water conductivity, not necessarily Temperature-Pressure Relief Valve water condition.
  • Page 34: Service

    servIce If you are not thoroughly familiar with gas codes, your water heater, and safety practices, contact your gas supplier or qualified installer If a condition persists or you are uncertain about the operation of to check the water heater. the water heater contact a service agency. Read this manual first. Then before checking the water heater make Use this guide to check a “Leaking” water heater. Many suspected sure the gas supply has been turned “OFF”, and never turn the gas “Leakers” are not leaking tanks. Often the source of the water can “ON” before the tank is completely full of water.
  • Page 35: Troubleshooting Guidelines

    trouBleshootInG GuIdelInes trouBle shootInG 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. INTELLI-VENT TROUBLESHOOTING CHART - USER CONTROL led status proBleM solutIon B c d e f Inadequate or no earth ground 1. Ensure the wall outlet is properly grounded. sensed by the Intelli-Vent™ control. 2. Ensure all ground connections/wires on the water heater are secure.
  • Page 36: Trouble Shooting

    trouBleshootInG GuIdelInes trouBle shootInG 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. INTELLI-VENT TROUBLESHOOTING CHART - USER CONTROL LED STATUS PROBLEM SOLUTION Ignition/flame failure. 1. Gas supply is turned off-pressure too low. Ensure supply and B C D E F manifold gas pressures are within requirements in installation The water heater has reached the manual.
  • Page 37 trouBleshootInG GuIdelInes trouBle shootInG 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. INTELLI-VENT TROUBLESHOOTING CHART - USER CONTROL LED STATUS PROBLEM SOLUTION B C D E F The self-diagnostic test determined resistance 1. Turn off power to the water heater. of the black resistor wire on ignitor assembly 2.
  • Page 38 trouBleshootInG GuIdelInes trouBleshootInG GuIdelInes These guidelines should be utilized by a qualified service agent.
  • Page 39: Limited Warranty

    limited warranty A. O. Smith Corporation, the warrantor, extends the following LIMITED WARRANTY to the owner of this water heater. 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. Some government agencies are requiring energy efficient standards for water heaters. In the event regulations prohibit sale of a model of equivalent size and construction, A.
  • Page 40 500 Tennessee Waltz Parkway, Ashland City, TN 37015 Technical Support: 800-527-1953 • Parts: 800-433-2545 • Fax: 800-644-9306 www.hotwater.com Copyright © 2010 A. O. Smith Corporation. All rights reserved.

This manual is also suitable for:

Btx-80

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