A.O. Smith ***81-140 Installation, Service, Maintenance
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A.O. Smith ***81-140 Installation, Service, Maintenance

A.O. Smith ***81-140 Installation, Service, Maintenance

Lined tank type gas water heater
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COMMERCIAL GAS
Lined Tank Type Water Heater
•
Installation
•
Service
•
Maintenance
CAUTION
TEXT PRINTED OR OUTLINED IN RED CONTAINS
INFORMATION RELATIVE TO YOUR SAFETY. PLEASE READ
THOROUGHLY BEFORE INSTALLING AND USING THIS
APPLIANCE.
PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND
NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.
PRINTED IN U.S.A. 1102
PART NO. 195091-000
1

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Summary of Contents for A.O. Smith ***81-140

  • Page 1 COMMERCIAL GAS Lined Tank Type Water Heater • Installation • Service • Maintenance CAUTION TEXT PRINTED OR OUTLINED IN RED CONTAINS INFORMATION RELATIVE TO YOUR SAFETY. PLEASE READ THOROUGHLY BEFORE INSTALLING AND USING THIS APPLIANCE. PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.

  • Page 2: Features And Specifications

    FEATURES AND SPECIFICATIONS The illustration shows a typical gas-fired commercial gas power burner, tank-type water heater. The principal components of the heater are shown and identified here. By referring to the plate on the heater jacket the unit may be identified in the specifications presented in Table 1 and 2.

  • Page 3: Table Of Contents

    FOREWORD THESE HEATERS MUST NOT BE INSTALLED DIRECTLY ON These designs comply with the latest version of the American COMBUSTIBLE FLOORS. National Standard for Gas Water Heaters, Volume III, ANSI Z21.10.3 - CSA 4.3. In addition to these instructions, the equipment shall be installed in accordance with those installation regulations in force in the Detailed installation diagrams are found in this manual.

  • Page 4: Improper Combustion

    Spray can propellants, cleaning solvents, refrigerator and air recommended that the hot water faucet be opened for several conditioning refrigerants, swimming pool chemicals, calcium minutes at the kitchen sink before using any electrical appliance and sodium chloride (water softener salt), waxes, and process connected to the hot water system.

  • Page 5: Features

    Refer to the piping diagrams at rear of manual for electrical The input reduction is primarily achieved by reducing the size of hookup information and install in accordance with the latest the main burner orifices. To do this, the main burner orifices version of the National Electric Code ANSI/NFPA No.

  • Page 6: Clearances

    ARE HEAVY AND TRAVEL ALONG THE FLOOR AND MAY BE CLEARANCES IGNITED BY THE HEATER’S IGNITION SYSTEM OR MAIN BURNER FLAMES CAUSING FIRE OR EXPLOSION. SOME These heaters are design certified by the Underwriter’s LOCAL CODES PERMIT OPERATION OF GAS APPLIANCES Laboratories for installation on non-combustible flooring in an IN SUCH AREAS IF THEY ARE INSTALLED 18 INCHES OR alcove with clearances to combustible construction of 6"...

  • Page 7: Mechanical Exhausting Of Room Air

    CARBONING OR SOOTING OF THE COMBUSTION CHAMBER, figure 4. The outlet of the draft control assembly may be rotated BURNERS AND FLUE TUBES AND CREATES A RISK OF to face in direction needed. The assembly must be fitted to the ASPHYXIATION.

  • Page 8: Drain Valve And Access Panels

    In venting systems where a continuous or intermittent back Occasionally, some water seepage will occur at a cleanout port. (positive) draft is found to exist, the cause must be determined To correct this situation, slightly tighten the cleanout cover bolts and corrected.

  • Page 9: Gas Piping

    TABLE 4 WARNING MAXIMUM CAPACITY OF PIPE IN CUBIC FEET OF GAS PER HOUR THE HEATER IS NOT INTENDED FOR OPERATION AT HIGHER THAN 10.5" W.C. - NATURAL GAS, 13.0" W.C. - PROPANE GAS (Based upon a Pressure Drop of 0.5 inch Water Column and (1/2 POUND PER SQUARE INCH GAUGE) SUPPLY GAS 0.6 Specific Gravity Gas and max.

  • Page 10: Water Line Connection

    With the power burner installed in the heater, the electrical wiring to installation diagrams on pages 12-16 of this manual for can be completed. On ***81-140 and ***81-199 models, remove suggested piping arrangements. the power burner backplate and fasten the conduit assembly to the power burner assembly.

  • Page 11: Wiring For ***81-140 Thru ***81-370

    SCHEMATIC DIAGRAM WIRING DIAGRAM WIRING FOR ***81-140 THRU ***81-370 FIGURE 9...

  • Page 12: Installation Diagrams

    INSTALLATION DIAGRAMS ONE TEMPERATURE - ONE HEATER VERTICAL STORAGE TANK FORCED CIRCULATION WITH OR WITHOUT BUILDING RECIRCULATION SCALD PREVENTION WATER SCALD USED CARELESSLY OR IN UNANTICIPATED MANNER. DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE NOTE:CONNECT RETURN LINE FROM HOT WATER CIRCULATING LOOP (IF USED) TO TEMPERATURE AT FIXTURES.
  • Page 13 ONE OR TWO TEMPERATURE - ONE HEATER MEDIUM TEMPERATURE STORAGE WITH OR WITHOUT RECIRCULATION (FOR STORAGE OR INSTANTANEOUS HEATERS ONLY) *PIPE RELIEF VALVE TO OPEN DRAIN NOTE:IF TEMPERED WATER IS RECIRCULATED, RETURN LINE SHOULD BE CONNECTED AT POINT “A”. INSTALL IN ACCORDANCE WITH LOCAL CODES.
  • Page 14 TWO TEMPERATURE - THREE HEATERS (TWO PRE-HEATERS/ONE BOOSTER) WITH OR WITHOUT CIRCULATION (FOR STORAGE OR INSTANTANEOUS HEATERS ONLY) FOR MULTIPLE HEATER INSTALLATION SEE MANIFOLD KIT SPECIFICATIONS. DANGER TEMPERATURE SETTING SHOULD NOT EXCEED SAFE USE TEMPERATURE CAUTION: IF BUILDING COLD WATER SUPPLY HAS A AT FIXTURES.
  • Page 15 ONE OR TWO TEMPERATURE - ONE HEATER MEDIUM TEMPERATURE STORAGE WITH RECIRCULATED LOOP (FOR STORAGE OR INSTANTANEOUS HEATERS ONLY) NOTE:IF TEMPERED WATER IS RECIRCULATED, RETURN LINE SHOULD BE CONNECTED AT POINT “A”. NOTE:STORED TEMPERATURE WATER LOOP, IF USED, CONNECT TO COLD WATER INLET.

  • Page 16: Manifold Kits

    MANIFOLD KITS Precision cut type “L” all copper manifold kits from your manufacturer assure water flow balance of all units. Without this balance, the full water heating and storage potential of the system cannot be achieved. Plus, the units with the higher water flow may have a shortened life.

  • Page 17: Prior To Start Up

    • Drill max. 5/16" hole in breeching as close as possible to flue PRIOR TO START UP connection on heater to install stack thermometer and combustion analyzing equipment. (See fig. 4). IMPORTANT • You are now ready to begin the burner start up procedure. IT IS REQUIRED THAT A QUALIFIED PERSON PERFORM THE Follow the OPERATIONAL PROCEDURE in the OPERATIONAL INITIAL FIRING OF THE HEATER.

  • Page 18: Operation & Adjustment Procedure

    OPERATIONAL AND ADJUSTMENT PROCEDURE (INITIAL START UP) 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. A. THIS APPLIANCE DOES NOT HAVE A PILOT. IT IS C.

  • Page 19: Adjustment Procedure

    TABLE 5 This is an acceptable input rate for a ***81-270, installed at an altitude up to 2000 feet, as it is within 2% of the rated input. Temperature Time to Produce 2nd & 3rd For installations at higher altitudes, the input will be less for Setting Degree Burns on Adult Skin the reasons explained in the FOREWORD.

  • Page 20: Maintenance

    1. Turn off the heater electrical disconnect switch. 6.Check main burner operation by cycling on and off the thermostat dial several times. Wait 1 minute between cycles for 2. Close the cold water inlet valve to heater. regulators and sequencing to reset. 3.

  • Page 21: Relief Valve

    To clean heater through cleanout opening, proceed as follows: POWER BURNER 1. Turn off water inlet valve, the heater electrical disconnect Keep the area around the burner clear and free of combustible switch and open drain valve. materials, gasoline or other flammable liquids or vapors. Do not obstruct burner air openings or ventilation grilles for 2.

  • Page 22: Electrical Servicing

    To test gate for operation gently tap gate and observe. DO NOT 4. Colder incoming water temperature will lengthen the time ATTEMPT TO ADJUST THIS CONTROL. DO NOT OIL. required to heat water to the desired temperature. • If the heater was installed when incoming water ANODE ROD INSPECTION temperature was warm, colder water creates the effect of less hot water.

  • Page 23: Troubleshooting

    • Installation of a second relief valve with lower setting 1. Motor relay drops out due to low voltage. than the primary relief valve. • Check valve circuit for ground or overload. • An expansion tank of suitable size and pressure rating and provision to avoid water logging.

  • Page 24: Parts List

    COMMERCIAL GAS Lined Tank Type Water Heater REPLACEMENT PARTS LIST MAIN BURNER ORIFICE CHART Natural Gas Propane Gas Burner Wayne C.S. Wayne C.S. Models Number Part No. (Decimal) Part No. (Decimal) ***81-140 HSG-200 62459-001 0.24 62459-001 0.209 ***81-199 HSG-200 62459-001 0.38 62459-001 0.257...
  • Page 25 Item Description ***81-140 ***81-199 ***81-270 ***81-370 1 ..Anode ............183523-42(2) ..183523-42(2) ..183523-42(2) ..183523-42(2) 2 ..Baffle, Flue ..........193888(7) ..... 193888(7) .... 193888(7) ....193888(7) 3 ..Barometric Draft Control w Tee Assy..170777 ....170777 ....170777-1 ....170777-1 4 ..
  • Page 26 MODEL HSG 200/400 GAS BURNER...
  • Page 27 Item Description Part Number 1 ..Burner Housing ..................6206 2 ..Air Tube-HSG200 6” .................. 6206-1 ..Air Tube-HSG400 6 1/4” ................6206-2 ..Air Tube-HSG200/400 9” ................6206-3 ..Air Tube-HSG200/400 12” ................ 6206-4 3 ..Air Cone-(HSG200 only) ................6206-5 4 ..

This manual is also suitable for:

***81-199***81-270***81-370

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