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5

thank You

 for purchasing this water heater.  Properly installed and 

maintained, it should give you years of trouble free service.
Abbreviations Found In This Instruction Manual:

•  CSA - Canadian Standards Association

•  ANSI - American National Standards Institute

•  NFPA - National Fire Protection Association

•  ASME - American Society of Mechanical Engineers

•  GAMA - Gas Appliance Manufacturer’s Association

•  UL - Underwriters Laboratories Inc. 

This  gas-fired  water  heater  is  design  certified  by  Underwriters 

Laboratories Inc. under American National Standard/CSA Standard 

for Gas Water Heaters ANSI Z21.10.3 • CSA 4.3 (current edition). 

qualIfIed Installer or servIce aGencY

Installation and service of this water heater requires ability equivalent 

to that of a Qualified Agency (as defined by ANSI below) in the field 

involved.  Installation  skills  such  as  plumbing,  air  supply,  venting, 

gas supply and electrical supply are required in addition to electrical 

testing skills when performing service.

ansI Z223.1 2006 sec. 3.3.83: 

“Qualified Agency” - “Any individual, 

firm,  corporation  or  company  that  either  in  person  or  through  a 

representative is engaged in and is responsible for (a) the installation, 

testing or replacement of gas piping or (b) the connection, installation, 

testing,  repair  or  servicing  of  appliances  and  equipment;  that  is 

experienced in such work; that is familiar with all precautions required; 

and  that  has  complied  with  all  the  requirements  of  the  authority 

having jurisdiction.”
If you are not qualified (as defined by ANSI above) and licensed or 

certified as required by authority having jurisdiction to perform a given 

task do not attempt to perform any of the procedures described in this 

manual. If you do not understand the instructions given in this manual 

do not attempt to perform any procedures outlined in this manual. 

preparInG for the InstallatIon

1.  Read “General Safety Information” section, page 3 and 4 of this manual 

first and then entire manual carefully. If you don’t follow safety rules, 

the water heater will not operate properly. It could cause DEATH, 

SERIOUS BODILY INJURY AND/OR PROPERTY DAMAGE.

  This manual contains instructions for 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. All 

warnings and all instructions are essential to proper operation of the 

water heater and your safety.  Since we cannot put everything on the 

first few pages, 

read entIre Manual Before atteMptInG 

to Install or operate the water heater.

2.  The installation must conform with these instructions and local code 

authority having jurisdiction. In absence of local codes, installation 

must comply with current editions of the National Fuel Gas Code, 

ANSI Z223.1/NFPA 54 and National Electrical Code, NFPA 70 or CAN/

CSA-B149.1, the Natural Gas and Propane Installation Code and CSA 

C22.1, Canadian Electrical Code. All documents are available from 

Canadian Standards Association, 8501 East Pleasant Valley Road, 

Cleveland, OH 44131. NFPA documents are also available from National 

Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02269.

3.  The water heater when installed must be grounded in accordance 

with the local codes, or in the absence of local codes: the National 

Electrical Code (NFPA 70) or the Canadian Electrical Code (C22.1).

4.  If  after  reading  this  manual  you  have  any  questions  or  do  not 

understand any portion of the instructions, call the local gas utility or 

the manufacturer whose name appears on the rating plate.

5.  Carefully plan the place where you are going to put the water heater.  

Correct  combustion,  vent  action,  and  vent  pipe  installation  are 

very important in preventing death from possible carbon monoxide 

poisoning and fires, see Figures 1 and 2.

  Examine the location to ensure the water heater complies with the 

“Locating the New Water Heater” section in this manual.

6.  For  California  installation  this  water  heater  must  be  braced, 

anchored,  or  strapped  to  avoid  falling  or  moving  during  an 

earthquake. See instructions for correct installation procedures. 

Instructions may be obtained from California Office of the State 

Architect, 400 P Street, Sacramento, CA 95814.

7.  Massachusetts Code requires this water heater to be installed in 

accordance with Massachusetts 248-CMR 2.00: State Plumbing 

Code and 248-CMR 5.00.

8.  Complies with SCAQMD rule #1146 and districts having equivalent 

NOx requirements.

IntroductIon

taBle of contents

SAFE INSTALLATION, USE AND SERVICE........................................ 2

APPROVALS ........................................................................................ 2

GENERAL SAFETY INFORMATION ................................................. 3-4

TABLE OF CONTENTS ........................................................................ 5

INTRODUCTION .................................................................................. 5

 

Qualified Installer or Service Agency ............................................ 5

 

Preparing for the Installation ........................................................ 5

INSTALLATION  REQUIREMENTS  FOR  THE  COMMONWEALTH

OF MASSACHUSETTS ........................................................................ 6

TYPICAL INSTALLATION .................................................................. 7-9

ROUGH IN DIMENSIONS .................................................................. 10

LOCATING THE NEW WATER HEATER .......................................11-14

 

Facts to Consider About Location ..........................................11-12

 

Insulation Blankets ..................................................................... 12

 

Air Requirements ........................................................................ 12

 

Unconfined Space ...................................................................... 13

 

Confined Space .......................................................................... 13

 

Fresh Air Openings for Confined Spaces ................................... 13

 

Outdoor Air Through One and Two Openings ............................ 13

 

Outdoor Air Through Horizontal and Vertical Ducts .................... 14

 

Air from Other Indoor Spaces ..................................................... 14

INSTALLING THE NEW WATER HEATER ................................... 15-28

 

Chemical Vapor Corrosion.......................................................... 15

 

Water Piping ............................................................................... 15

 

Space Heating and Potable Water System ................................ 15

 

Closed Water Systems ............................................................... 15

 

Thermal Expansion .................................................................... 16

 

Temperature-Pressure Relief Valve ....................................... 16-17

 

High Altitude Installation ............................................................. 17

 

Gas Piping .................................................................................. 17

 

Sediment Traps .......................................................................... 18

 

Filling the Water Heater .............................................................. 18

 

Vent Pipe Assembly .................................................................... 19

 

Venting ....................................................................................... 19

 

Vent Pipe Termination ................................................................ 20

 

Planning the Vent System .......................................................... 21

 

Condensate ........................................................................... 21-22

 

Blower Assembly Installation ...................................................... 22

 

Installation of Vent System ......................................................... 22

 

Vent Terminal Installation, Sidewall ....................................... 22-23

 

Installation of Vent System, Sidewall .......................................... 24

 

Installation of Vertical Vent System ............................................ 24

 

Vent Attenuation Assembly Installation Instructions ................... 25

 

Vent Pipe Preparation ........................................................... 27-28

LIGHTING & OPERATING LABEL ..................................................... 29

TEMPERATURE REGULATION ........................................................ 30

FOR YOUR INFORMATION ............................................................... 31

 

Start Up Conditions .................................................................... 31

 

Operational Conditions ............................................................... 31

PERIODIC MAINTENANCE .......................................................... 32-34

 

Venting System Inspection ......................................................... 32

 

Burner Operation and Inspection ............................................... 32

 

Burner Cleaning ......................................................................... 32

 

Housekeeping ............................................................................ 32

 

Anode Rod Inspection ........................................................... 32-33

 

Temperature-Pressure Relief Valve Test .................................... 33

 

Draining and Flushing ................................................................ 33

 

Service ....................................................................................... 34

LEAKAGE CHECKPOINTS ................................................................ 34

TROUBLESHOOTING GUIDELINES ............................................ 35-38

LIMITED WARRANTY ........................................................................ 39

Summary of Contents for BTX-80 SERIES 100

Page 1: ...MODEL BTX 80 SERIES 100 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...

Page 2: ...alert symbol indicates a potentially hazardous situation which if not avoided could result in property damage WARNING CAUTION CAUTION DANGER All safety messages will generally tell you about the type...

Page 3: ...3 GENERAL SAFETY INFORMATION...

Page 4: ...4 GENERAL SAFETY INFORMATION at least 18 45 7cm above the floor This will reduce but not eliminate the risk...

Page 5: ...d Cleveland OH44131 NFPAdocumentsarealsoavailablefromNational Fire Protection Association 1 Batterymarch Park Quincy MA 02269 3 The water heater when installed must be grounded in accordance with the...

Page 6: ...feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment The sign shall read in print size no less than one half 1 2 inch...

Page 7: ...Exhaust Tee GG Elbow GET TO KNOW YOUR WATER HEATER GAS MODELS A Vent Pipe B Anode C Hot Water Outlet D Outlet 120 VAC F Gas Supply G Main Manual Gas Shut Off Valve H Ground Joint Union J Dirt Leg K O...

Page 8: ...8 TYPICAL INSTALLATION CONDENSATE HOSE AND DRAIN PAN FIGURE 1 continued...

Page 9: ...ship 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 tempe...

Page 10: ...cs 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 dynami...

Page 11: ...talled in locations where leakage may result in property damage even with the use of a drain pan piped to a drain However unanticipated damage can be reduced or prevented by a leak detector or water s...

Page 12: ...rine based chemicals refrigerants etc in addition to being highly flammable in many cases will also react to form corrosive hydrochloric acid when exposed to the combustion products of the water heate...

Page 13: ...e the size of openings providing fresh air into confined spaces EXHAUST FANS Where exhaust fans are installed additional air shall be provided to replace the exhausted air When an exhaust fan is insta...

Page 14: ...a reference for the openings that provide fresh air into confined spaces only Do not refer to these illustrations for the purpose of vent installation See Installation of Vent System on pages 19 26 fo...

Page 15: ...e requirements or such conditions as high line pressure among others have installed devices such as pressure reducing valves check valves and back flow preventers Devices such as these cause the water...

Page 16: ...the T P valve Secure all insulation using tape Temperature Pressure Relief Valve Explosion Hazard Temperature Pressure Relief Valve must comply with ANSI Z21 22 CSA 4 4 and ASME code Properly sized T...

Page 17: ...P valve is not intended for the constant relief of thermal expansion Aproperly sized thermal expansion tank must be installed on all closed systems to control thermal expansion see Closed Water Syste...

Page 18: ...system by closing itsindividualmanualShut offvalveduringanypressuretestingofthegas supply piping system at test pressures equal to or less than 1 2 pound per square inch 3 5 kPa Connecting gas piping...

Page 19: ...uctions Assemble Vent Pipe Assemblies 1 2 and 3 See Figure 1 prior to cementing The preferred orientation of Vent Pipe Assembly 1 Condensate U Assembly is shown in Figure 16 However this assembly may...

Page 20: ...0 cm 12 inches 30 cm K Clearance to a mechanical air supply inlet 6 feet 1 83 m 3 feet 91 cm above if within 10 feet 3 m horizontally E Clearance to unventilated soffit 12 inches 30 cm 12 inches 30 cm...

Page 21: ...rectmaterialasdetailedabovehasbeenused andthatminimum ormaximumventlengthsandterminallocationasdetailedinthismanual have been met Carefully inspect entire venting system for any signs of cracks or fra...

Page 22: ...hat the plastic tubing is still attached from the air pressure switch to the port on the blower housing Make sure the plastic tubing is not folded anywhere between the pressure switch and the blower h...

Page 23: ...ine This will allow the vent to easily slide through the opening The resulting gap will be covered up by the Vent Terminal cover plate Repeat this step on inside wall if necessary SEQUENCE OF INSTALLA...

Page 24: ...ighest anticipated snow level install a snorkel as shown in bottom portion of Figure 20 NOTE With the installation of a snorkel it is necessary to use two 90 elbows that shall be considered along with...

Page 25: ...cement not included with kit and glue the two inch PVC pipe coming from the blower into the VAA 3 Perform the same sequence on the PVC pipe coming from the exhaust side vent terminal side of the VAA 4...

Page 26: ...and the vent pipe system Air leaks will allow flue gas by products to disseminate into the room creating an unsafe environment and could cause illness asphyxiation and or even death FIGURE 24 Typical...

Page 27: ...and above PRIMER It is recommended that Tetrahydrofuran THF be used to prepare the surfaces of pipe and fittings for solvent welding Do not use water rags gasoline or any other substitutes for cleanin...

Page 28: ...make a second mark as the primer and cement will most likely destroy your first one Apply primer to the surface of the pipe and fitting socket with a natural bristle brush This process softens and pr...

Page 29: ...R buttons together and holding for 1 second Then press the COOLER button until the WARM indicator light appears 2 Set the ON OFF switch on the blower control box to the OFF position 3 Turn off all ele...

Page 30: ...c does not have access If a suitable area is not available a cover should be installed over the thermostat to prevent tampering Thewatertemperaturesettingwasfactorysetatthelowesttemperature Pressing t...

Page 31: ...cal water heater supplier or service agency for further information concerning an Anode Replacement Kit and this chlorination treatment If the smelly water persists after the anode replacement and chl...

Page 32: ...uld be made of the main burner and the hot surface igniter assembly for proper flame characteristics and ignition sequences This can be done by removing the Outer Door and viewing the main burner oper...

Page 33: ...have a thermal expansion tank installed is not covered under the limited warranty Thermal expansion tanks must be installed on all closed water systems DO NOT PLUG THE TEMPERATURE PRESSURE RELIEF VALV...

Page 34: ...ose connections or the relief valve DO NOT replace the water heater until a full inspection of all possible water sources is made and necessary corrective steps taken Leakage from other appliances wat...

Page 35: ...control does not energize the blower replace the Intelli Vent control If the blower fails to Blower may run continuously in start when energized replace the blower assembly this condition 2 Ensure the...

Page 36: ...ff for 10 20 seconds then on again to clear this error code 4 Ensure the flame sensor is clean use ultra fine steel wool or Scotch Brite pad to clean flame sensor 5 Ensure the hot surface ignitor is p...

Page 37: ...in tolerance 1 Ensure air pressure switch hose is not kinked or clogged ensure the blower housing is clear of any condensation 2 Check vent temperature limit switch if it is determined that the vent t...

Page 38: ...38 These guidelines should be utilized by a qualified service agent TROUBLESHOOTING GUIDELINES TROUBLESHOOTING GUIDELINES...

Page 39: ...unless an effective method of controlling thermal expansion is also installed at the heater s and operational at all times The relief valve installed on the heater is not an acceptable method 4 SERVI...

Page 40: ...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...

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