A.O. Smith GPS-75 Instruction Manual
A.O. Smith GPS-75 Instruction Manual

A.O. Smith GPS-75 Instruction Manual

Residential gas water heaters
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500 Tennessee Waltz Parkway
Ashland City, TN 37015
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 IN THE U.S.A 0209
resIdentIal Gas water heaters
Keep thIs Manual In the pocKet on heater for future reference
whenever MaIntenance adjustMent or servIce Is requIred.

Instruction Manual

Gas Models power vent Gps-75
Thank you for buying this energy efficient water heater. We
appreciate your confidence in our products.
You should thoroughly read this manual before installation and/or
operation of this water heater. Please pay particular attention
to the important safety and operating instructions as well as the
WARNINGS and CAUTIONS.

for Your safety

AN ODORANT IS ADDED TO THE GAS USED
BY THIS WATER HEATER.
1
wIth hot surface IGnItIon
197209-002

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Summary of Contents for A.O. Smith GPS-75

  • Page 1: Instruction Manual

    Instruction Manual resIdentIal Gas water heaters Gas Models power vent Gps-75 wIth hot surface IGnItIon 500 Tennessee Waltz Parkway Ashland City, TN 37015 Thank you for buying this energy efficient water heater. We appreciate your confidence in our products. You should thoroughly read this manual before installation and/or operation of this water heater.
  • Page 2: Safe Installation, Use And Service

    safe InstallatIon, use and servIce Your safety and the safety of others is extremely important in the installation, use and servicing of this water heater. 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

    General safetY...
  • Page 4: General Safety

    General safetY...
  • Page 5: Table Of Contents

    taBle of contents SAFE INSTALLATION, USE AND SERVICE........2 Installation of Vent System..........18-21 GENERAL SAFETY..............3-4 Vent Pipe Preparation ............21-22 TABLE OF CONTENTS ..............5 LIGHTING & OPERATING LABEL ..........23 INTRODUCTION ................5 TEMPERATURE REGULATION ..........24 Preparing for the Installation ........... 5 FOR YOUR INFORMATION ............
  • Page 6: Installation Requirements For The Commonwealth Of Massachusetts

    InstallatIon requIreMents for the coMMonwealth of Massachusetts For all side wall terminated, horizontally vented power vent, direct vent, and power direct vent gas fueled water heaters installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied: InstallatIon of carBon MonoXIde detectors At the time of installation of the side wall horizontal vented gas...
  • Page 7: Typical Installation

    tYpIcal InstallatIon replaceMent parts and delIMInG products vent pIpe Inlet dIp tuBe anode teMperature and hot water outlet pressure relIef valve Replacement parts and recommended delimer may be ordered outlet (120 vac) ratInG plate through authorized servicers or distributors. Refer to the Yellow flue Baffle InsulatIon Pages for where to call or contact the water heater manufacturer...
  • Page 8: Typical Installation

    tYpIcal InstallatIon MIXInG valve usaGe fIGure 2. This appliance has been design certified as complying with American HOTTER WATER CAN SCALD: National Standard for water heaters and is considered suitable for: Water heaters are intended to produce hot water. Water heated to a water (potable) heating and space heating: All models are temperature which will satisfy space heating, clothes washing, dish considered suitable for water (potable) heating and space heating.
  • Page 9: 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 10: Insulation Blankets

    Propellants of aerosol sprays and volatile compounds (cleaners, chlorine 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 heater. The results can be hazardous, and can also cause product failure.
  • Page 11 manner, should be provided. Each opening should have a free area of not less than one square inch per 4000 Btu/hr (5.5 cm /kW) of total input of all appliances in the enclosure. If horizontal ducts are used, each opening should have a free area of not less than one square inch per 2000 Btu/hr (11cm /kW) of the total input of all appliances in the enclosure.
  • Page 12: Installing The Water Heater

    InstallInG the new water heater As water is heated, it expands (thermal expansion). In a closed cheMIcal vapor corrosIon system, the volume of water will grow. As the volume of water grows, there will be a corresponding increase in water pressure due CORROSION OF THE FLUEWAYS AND VENT SYSTEM MAY OCCUR IF to thermal expansion.
  • Page 13: Temperature-Pressure Relief Valve

    Figure 9 shows typical attachment of water piping to water heater. The (150 psi = 1,035 kPa) and a discharge capacity not less than the water water heater is equipped with 3/4 inch NPT water connections. heater input rate as shown on the model rating plate. note: If using copper tubing, solder tubing to an adapter before For safe operation of the water heater, the relief valve must not be attaching the adapter to the water heater connections.
  • Page 14: Gas Piping

    When installed at elevations above 7,700 feet (2,347 meters), input Gas pIpInG rating should be reduced at the rate of 4 percent for each 1,000 feet (305 meters) above sea level which requires replacement of the burner orifice in accordance with National Fuel Gas Code (ANSI Z223.1/NFPA 54).
  • Page 15: Sediment Traps

    sedIMent traps Never use this water heater unless it is completely full of water. To prevent damage to the tank, the tank must be filled with water. Water must flow from the hot water faucet before turning “ON” gas to the water heater.
  • Page 16: Planning The Vent System

    u.s. horIZontal vent clearances warnInG vent hood(s) MaY Be eXtreMelY hot durInG operatIon. fIGure 14. 2. A venting system should terminate at least 3 feet above any 2. This water heater is capable of venting the flue gases the equivalent of thirty (30) feet of 3 inch pipe or one-hundred (100) forced air inlet located within 10 feet.
  • Page 17: Condensate

    note: This unit can be vented using only the following materials: PVC (Cellular Core; ASTM-F891), PVC (DWV; ASTM D2665 or CSA B181.2), PVC (Sch 40, 80, 120; ASTM D1785 or CSA B137.3), PVC (SDR Series; ASTM-D2241 or CSA B137.3), CPVC (CPVC 41; ASTM-D2846 or CSA B137.6), CPVC (Sch 40, 80;...
  • Page 18: Installation Of Vent System

    vent terMInal InstallatIon, sIdewall 4. Do not plug in power cord until vent system is completely installed. The Power Vent operates on 120 Vac, therefore a grounded outlet 1. Install the vent terminal by using the cover plate as a template to must be within reach of the 6 foot flexible power cord supplied mark the hole for the vent pipe to pass through the wall.
  • Page 19 cautIon LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS OPERATION. VERIFY PROPER OPERATION AFTER SERVICING. fIGure 17. power vent wIrInG scheMatIc.
  • Page 20: Installation Of Vent System

    InstallatIon of vent sYsteM, sIdewall Provide support for all pipe protruding through the roof. All piping should be properly secured. The vent system piping should be With the route of the venting system and selection of materials completed, supported every 5 feet (1.5 m) of vertical run and every 3 feet (91 cm) as discussed in the section of this manual titled PLANNING THE VENT of horizontal run.
  • Page 21: 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.
  • Page 22 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 pipe. A slight chamfer (bevel) of about 10°-15°...
  • Page 23: 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 24: Temperature Regulation

    teMperature reGulatIon Any water heater’s intended purpose is to heat water. Hot water is should be installed over the thermostat to prevent tampering. The water temperature setting was factory set at the lowest temperature; needed for cleansing, cleaning, and sanitizing (bodies, dishes, clothing). Untempered hot water can present a scald hazard.
  • Page 25: For Your Information

    for Your InforMatIon start up condItIons of a “rotten egg smell” in the hot water. The smell is a result of four factors which must all be present for the odor to develop: sMoKe/odor a. A concentration of sulfate in the supply water. It is not uncommon to experience a small amount of smoke and odor b.
  • Page 26: Periodic Maintenance

    perIodIc MaIntenance ventInG sYsteM InspectIon quiet operation, and cause no excessive flame lifting from the burner ports. If the proper flame characteristics are not evident, see Figure 21, make sure that the flow of combustion and ventilation air is not blocked. You should also check for sooting.
  • Page 27: Anode Rod Inspection

    teMperature-pressure relIef valve operatIon INSTALLED IN SUITABLE AREA: To insure sufficient ventilation and combustion air supply, proper clearances from the water heater must be maintained. See “Locating the New Water Heater” section. Combustible materials such as clothing, cleaning materials, or flammable liquids, etc.
  • Page 28: 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.
  • Page 29: Repair Parts

    repaIr parts lIst Key no. part description pipe nipple stamped steel Burner cast Iron Burner Burner tube (stamped Burner) Burner tube (cast Iron Burner) Orifice (Stamped Steel Burner) Orifice (Cast Iron Burner) Ignitor/flame sensor (stamped steel Burner) Ignitor/flame sensor (cast Iron Burner) Ignitor Bracket (cast Iron Burner) Blower assembly Inlet tube, closed end...
  • Page 30: Troubleshooting

    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 - RESIDENTIAL CONTROL led status proBleM solutIon Inadequate or no earth ground 1.
  • Page 31: 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 - RESIDENTIAL CONTROL led status proBleM solutIon Ignition/flame failure.
  • Page 32: Troubleshooting

    trouBleshootInG GuIdelInes trouBleshootInG GuIdelInes These guidelines should be utilized by a qualified service agent.
  • Page 33 notes:...
  • Page 34 notes:...
  • Page 35: Warranty

    WARRANTY PERIOD by calling 1-800-821-2017. MODEL TANK PARTS GPS-75 6 YEARS 6 YEARS The warrantor will only honor replacement with identical or similar water heater or parts thereof which are manufactured or distributed by the warrantor. When the water heater has been used for other than single family residential application: 1.
  • Page 36 500 TENNESSEE WALTZ PARKWAY ASHLAND CITY, TN 37015 www.hotwater.com...

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