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Instruction Manual
RESIDENTIAL GAS WATER HEATERS
DIRECT VENT GAS MODELS GDV/GDVT
NOT FOR USE IN MANUFACTURED (MOBILE) HOMES
500 Tennessee Waltz Parkway
Ashland City, TN 37015
•
•
For Your Safety
AN ODORANT IS ADDED TO THE GAS USED
BY THIS WATER HEATER.
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.
KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE
WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.
1212
PART NO. 321348-001
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Table of Contents
Related Manuals for A.O. Smith GDV
Summary of Contents for A.O. Smith GDV
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Page 1: Instruction Manual
Instruction Manual RESIDENTIAL GAS WATER HEATERS DIRECT VENT GAS MODELS GDV/GDVT NOT FOR USE IN MANUFACTURED (MOBILE) HOMES 500 Tennessee Waltz Parkway Ashland City, TN 37015 • • 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 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: Table Of Contents
TABLE OF CONTENTS SAFE INSTALLATION, USE AND SERVICE TEMPERATURE REGULATION IMPORTANT DEFINITIONS......2 Temperature Regulation ......21 GENERAL SAFETY Operating The Temperature Control System . -
Page 5: Introduction
INTRODUCTION 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 •... -
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 fi... -
Page 7: Typical Installation
TYPICAL INSTALLATION GET TO KNOW YOUR WATER HEATER REPLACEMENT PARTS Replacement parts may be ordered through authorized servicers or distributors. When ordering parts, provide complete model and serial numbers (see rating plate), quantity and name of part desired (as listed in Figure 1). Standard hardware items may be purchased locally. -
Page 8: Mixing Valve Usage
MIXING VALVE USAGE MIXING VALVE TEMPERED POTABLE WATER SHUT-OFF VALVE COLD WATER INLET NON-TEMPERED WATER SUPPLY NON-TEMPERED WATER RETURN SUGGESTED PIPING ARRANGEMENT FOR TOP CONNECTIONS TEMPERATURE-PRESSURE RELIEF VALVE GAS SUPPLY DISCHARGE PIPE (DO NOT CAP OR PLUG) CERTAIN MODELS ARE EQUIPPED WITH SIDE PLUMBING CONNECTIONS FOR SPACE HEATING. -
Page 9: Locating The New Water Heater
LOCATING THE NEW WATER HEATER FACTS TO CONSIDER ABOUT THE LOCATION • Sensors mounted in the metal drain pan that turn off the wa- ter supply to the entire home when water is detected in the Carefully choose an indoor location for the new water heater, metal drain pan. -
Page 10: Insulation Blankets
INSULATION BLANKETS VENT TERMINATION Insulation blankets available to the general public for external Before installing water heater determine placement of vent ter- use on gas water heaters are not necessary with this product. mination. The purpose of an insulation blanket is to reduce the standby heat loss encountered with storage tank water heaters. -
Page 11: Installing The New Water Heater
INSTALLING THE NEW WATER HEATER REQUIRED ABILITY INSTALLATION OR SERVICE OF THIS WATER HEATER REQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED TRADESMAN IN THE FIELD INVOLVED. PLUMBING, AIR SUPPLY, VENTING AND GAS SUPPLY ARE REQUIRED. INSPECT SHIPMENT This water heater shall not be connected to any heating systems There may be hidden damage caused in transit. -
Page 12: T&P Valve And Pipe Insulation (If Supplied)
Locate the hot water (outlet) & cold water (inlet) pipes to the water heater. Locate the slit running the length of a section of pipe insula- tion. Spread the slit open and slip the insulation over the cold water (inlet) pipe. Apply gentle pressure along the length of the insulation to ensure that it is fully seated around the pipe. -
Page 13: Water (Potable) Heating And Space Heating
The temperature-pressure relief valve must be installed directly WATER (POTABLE) HEATING AND SPACE HEATING into the fi tting of the water heater designed for the relief valve. Position the valve downward and provide tubing so that any dis- All piping components connected to this unit for space heat- charge will exit only within 6 in. -
Page 14: Gas Piping
GAS PIPING Make sure the gas supplied is the same type listed on the model When installed at elevations above 7,700 feet, input rating rating plate. The inlet gas pressure must not exceed 14 inch should be reduced at the rate of 4 percent for each 1,000 feet water column (3.5 kPa) for natural and propane gas (L.P.). -
Page 15: Sediment Traps
Gas piping with fl exible connector. HOT WATER COLD WATER OUTLET INTLET SHUTOFF UNION VALVE UNION TEMPERATURE AND PRESSURE RELIEF VALVE FIGURE 7 Gas piping with all black iron pipe to gas control. DISCHARGE PIPE (DO NOT CAP OR PLUG) METAL FIGURE 8 DRAIN PAN... -
Page 16: High Altitude Installations
VENTILATING AIR. ADEQUATE AIR FOR COMBUSTION AND VENTILATION MUST BE PROVIDED FOR SAFE OPERATION. HIGH ALTITUDE INSTALLATIONS Installations above 7,700 ft. require replacement of the burner orifi ce in accordance with the current edition of the National Fuel Gas Code ANSI Z223.1/NFPA 54. Failure to replace the orifi ce could result in improper and ineffi... -
Page 17: Vent Connections
VENT CONNECTIONS 7 in. DIAMETER After the location for the vent terminal has been selected as outlined in Figures 3 & 15, use the following illustrations for installation: (SEE TEXT) BOTTOM OF HEATER FIGURE 13 HIGH RISE VENT ARRANGEMENT When the height H (From vent terminal center line to bottom of heater) is over 80 in. -
Page 18: Standard Vent Arrangement
STANDARD VENT ARRANGEMENT UNCOMPRESSING THE CORRUGATED TUBING Pull the inner corrugated tube towards the water heater and 17 in. MIN.,* WALL 80 in. MAX. 3.6 in. leave some length over the water heater’s center for bend- 2.6 in. ing. Pull the outer corrugated tube toward the water heater and leave it 1 in. -
Page 19: Offset Vent Arrangement
OFFSET VENT ARRANGEMENT CONDITION 1: Where a straight vent arrangement is impossible, a horizontal 90 degree maximum bend can be made. Use the water heater cas- ing outer diameter as a template to form the corrugated tube. TOP VIEW 90° MAXIMUM BEND FIGURE 22 Apply hi-temp red silicone (included) around the collar on air... -
Page 20: For Your Safety Read Before Lighting
FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not follow these instructions exactly, a fire or explosion WARNING: If you do not follow these instructions exactly, a fire or may result causing property damage, personal injury or loss of life. explosion may result causing property damage, personal injury or loss of life. -
Page 21: Temperature Regulation
TEMPERATURE REGULATION TEMPERATURE REGULATION GAS CONTROL VALVE/THERMOSTAT 130°F 140°F 150°F 155°F MARK MARK MARK MARK SETTINGS GAS CONTROL/ TEMPERATURE KNOB STATUS LIGHT 120°F MARK 91°F MARK IGNITER FIGURE 26 Should overheating occur or the gas supply fail to shut off, turn off the manual gas control valve to the appliance. -
Page 22: For Your Information
FOR YOUR INFORMATION EXTERNAL DAMAGE THERMAL EXPANSION Do not operate the water heater until it has been fully checked out by a qualifi ed technician, if the water heater: • Has been exposed to fi re or damage. • Displays evidence of sooting. •... -
Page 23: Operational Conditions
OPERATIONAL CONDITIONS SMELLY WATER In each water heater there is installed at least one anode rod (see parts section) for corrosion protection of the tank. Certain water conditions will cause a reaction between this rod and the water. The most common complaint associated with the anode rod is one of a “rotten egg smell”... -
Page 24: Maintenance
MAINTENANCE FOR YOUR SAFETY AND SATISFACTORY OPERATION, IT IS a fl ooded water heater. Do not attempt to repair the unit! It must RECOMMENDED THAT THIS HEATER BE CHECKED ONCE A be replaced! YEAR BY A COMPETENT SERVICE PERSON. At least once a year a visual inspection should be made of the main burner and the pilot assembly for proper fl... -
Page 25: Replacing The Manifold/Burner Assembly
SOOT BUILD-UP INDICATES A PROBLEM THAT REQUIRES REPLACING THE MANIFOLD/BURNER ASSEMBLY CORRECTION BEFORE FURTHER USE. CONSULT WITH A QUALIFIED SERVICE TECHNICIAN. WARNING Should the main burner or burner air openings require cleaning, turn the gas control knob to “OFF” position and allow the burner to cool. -
Page 26: Removing The Manifold/Burner Assembly
Turn off the gas at the manual shut-off valve on the gas sup- GAS CONTROL/ ply pipe (Figure 3). TEMPERATURE KNOB Drain the water heater. Refer to the section of “Draining and Flushing” and follow the procedure. Disconnect the igniter wire from the igniter lead wire. Use nee- dle nose pliers to disconnect the red (+) and white (-) thermopile IGNITER wires. -
Page 27: Removing The Burner From The Manifold/Burner Assembly
REMOVING THE BURNER FROM THE MANIFOLD/ THERMOPILE THERMOPILE CONNECTOR BURNER ASSEMBLY PILOT PILOT/THERMOPILE NATURAL GAS (LOW NOX) & L.P. GAS BURNER ASSEMBLY Take off the burner by removing the two (2) screws located underneath the burner. WHITE WIRE Check the burner to see if it is dirty or clogged. The burner may be cleaned with soap and hot water (Figure 24).Important: DO NOT remove the orifi... -
Page 28: Temperature & Pressure Relief Valve
TEMPERATURE & PRESSURE RELIEF VALVE CATHODIC PROTECTION - ANODE At least once a year, the temperature and pressure relief valve, The anode rod within the tank is designed to be slowly consumed Figure 1, must be checked to ensure that it is in operating condi- cathodically, minimizing corrosion in the glass-lined tank. - Page 29 ANODE ROD MAINTENANCE To replace the anode: Turn off gas supply to the water heater. Shut off the water supply and open a nearby hot water faucet to depressurize the water tank. Drain approximately 5 gallons of water from tank. (Refer to “Draining and Flushing”...
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Page 30: Leakage Checkpoints
LEAKAGE CHECKPOINTS SERVICE If a condition persists or you are uncertain about the operation of the water heater contact a service agency. Use this guide to check a “Leaking” water heater. Many sus- pected “Leakers” are not leaking tanks. Often the source of the water can be found and corrected. -
Page 31: Troubleshooting Guidelines
TROUBLESHOOTING GUIDELINES PROBLEM POSSIBLE CAUSE(S) CORRECTION Pilot not lit Light pilot Thermostat set too low Turn temp. dial to desired temperature No gas Check with gas utility company Dirt in the gas lines Notify utility-install trap in gas line BURNER WILL NOT IGNITE Pilot line clogged Clean, locate source and correct Main burner line clogged... - Page 32 PROBLEM POSSIBLE CAUSE(S) CORRECTION Excessive water pressure Use a pressure reducing valve and relief Heater stacking valve DRIP FROM RELIEF VALVE Closed water system Lower the thermostat setting Temperature setting too high See “Closed System/Thermal Expansion” Decrease the temperature setting THERMOSTAT FAILS TO Defective gas control/thermostat Replace gas control/thermostat...
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Page 33: Notes
NOTES... -
Page 34: Residential Gas Warranty
GCVT, GCVX, GCNH, GNR, • installed with no attempted, nor actual modifi cation or GDV, GDVT alteration of the water heater’s design in any way, includ- ing but not limited to, the attachment of non-company When the water heater has been used for other than single approved appliances or equipment. - Page 35 SERVICE AND LABOR RESPONSIBILITY PROOF-OF-PURCHASE AND PROOF-OF-INSTALLATION DATE ARE REQUIRED TO SUPPORT WARRANTY CLAIM UNDER THIS LIMITED WARRANTY, THE WARRANTOR FROM ORIGINAL OWNER. THIS FORM DOES NOT WILL PROVIDE ONLY A REPLACEMENT WATER HEATER CONSTITUTE PROOF-OF-PURCHASE OR PROOF-OF- OR PART THEREOF. THE OWNER IS RESPONSIBLE FOR INSTALLATION.
- Page 36 500 TENNESSEE WALTZ PARKWAY ASHLAND CITY, TN 37015 PHONE: 1-800-433-2545 FAX: 1-800-433-2515 www.aosmithwaterheaters.com / email: parts@hotwater.com...