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GAS WATER HEATERS
RESIDENTIAL OWNER'S MANUAL
DIRECT VENT
GAS MODELS
Thank you for buying this energy efficient water heater from
A.O. Smith Water Products Company. We appreciate your
GDVH/GDVS/XDVS
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.
TABLE OF CONTENTS
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GET TO KNOW YOUR WATER HEATER TYPICAL INSTALLATION REPLACEMENT PARTS Replacement parts may be ordered through authorized WARNING servicers or distributors. Refer to the Yellow Pages for where to DO NOT ATTEMPT TO OPERATE WATER HEATER WITH COLD call or contact A. O. Smith Water Products Company, 500 WATER INLET VALVE CLOSED. Tennessee Waltz Parkway, Ashland City, TN 37015, 1-800-433-2545. When ordering parts, provide complete model and serial numbers (see rating plate), quantity and name of p
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combustion, resulting in fire, asphyxiation, serious personal GENERAL SAFETY injury or death. INFORMATION • Do not cover the outer door, thermostat or temperature & pressure relief valve. EXTERNAL DAMAGE • Do not cover the instruction manual. Keep it on the side of the water heater or nearby for future reference. Do not operate the water heater until it has been fully checked out • Do obtain new warning and instruction labels from A.O. Smith by a qualified technician, if the
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inches greater than the diameter of the heater and should be piped to WARNING an adequate drain. Drain pans suitable for these heaters are DO NOT INSTALL THIS WATER HEATER DIRECTLY ON A available from your dealer or A. O. Smith Water Products Company, CARPETED FLOOR. A FIRE HAZARD MAY RESULT. Instead the 500 Tennessee Waltz Parkway, Ashland City, TN 37055. Contact us at water heater must be placed on a metal or wood panel extending our website: www.aosmithwaterheaters.com,phone: 800.433.254
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Make sure that the outside vents on the supply regulators and the not exceed the working pressure shown on the rating plate of the safety vent valves are protected against blockage. These are heater. In addition, the hourly BTU rated temperature steam parts of the gas supply system not the heater. Vent blockage may discharge capacity of the relief valve shall not be less than the occur during ice storms. input rating of the heater. NO VALVE IS TO BE PLACED BETWEEN THE RELIEF VALVE AND TANK.
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FIGURE 3A FIGURE 4 COMBUSTION AIR AND VENTILATION WARNING When determining the installation location for a direct vent Vent termination must not be within 4 feet of any items such as water heater, snow accumulation and drifting should be gas meters, gas valves or other gas regulating equipment. considered in areas where applicable. OPTIONAL WIRE GRILL VENTING CLEARANCES When the water heater vent cap is low enough to be touched accidentally, or is accessible to
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FLUE EXTENSIONS There are three optional extension kits available. Any combination of the three kits can be chosen; however, only one kit can be used vertically and/or horizontally, see Figures 10 and 11. WARNING At no time can more than one Vertical and/or one Horizontal Vent Kit be used. Unless otherwise specified at the time of ordering, a standard extension kit is individually packaged and shipped within the water heater carton. POSSIBLE EXTENSION COMBINATIONS FIGURE 6 FIGUR
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TABLE 2. VERTICAL (EXTENSION KIT) HEIGHT E DIMENSIONS It is simple to determine which kit is needed for vertical height. 40-50 Gal. 75 Gal. Take the total height (to the top of the flue) required and VENT KITS MIN. MAX. MIN. MAX. comparing that to “F DIMENSION” in TABLE 1, it can be 900068-7-STD. 3-1/2 10 7/8 7-3/8 determined which kit needs to be used vertically. 900124-6 10 15-1/2 7-3/8 12-7/8 900124-7 15-1/2 26-1/2 12-7/8 23-7/8 WARNING 900124-8 26-1/2 48 23-7/8 45-3/8 Obstructions and dete
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4. First remove the 3” horizontal extension from the elbow. WATER HEATER ATTITUDE Starting with the long end (with four securing holes), place the 6” diameter vent elbow over the 3” diameter elbow. There is a certain amount of variation permissible with regard Bend the round end “oval” to fit the flared oval end of the to the direction the water heater faces. jacket top. Standing in front of the water heater (gas control facing you), set the 3” diameter elbow (slotted end) on the flue. This wil
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8. Slide the vent collar (to be installed later) over the 6” vent elbow. FIGURE 26 12. Four wood screws are supplied to temporarily attach the FIGURE 22 collar to the exterior wall of the building. However, other types of screws may have to be substituted depending on the 9. Place the water heater at the opening in the wall, at the material used in the construction of the exterior wall. predetermined clearance.
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16. Go back indoors to attach inside collar to the inside wall. Use the simple equation below, chart and drawing Place the collar against the wall. Secure to wall by using 4 to find the length of expansion of the telescoping flue sections. long sheet metal screws. Because of manufacturing tolerances, place the telescoping extension on the water heater and adjust the height (“X” Dimension) and mark the point. Once the length has been determined, lock the two sections together by drilling two ho
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8. Making sure the 6” diameter elbow is centered around the 4. Using the tube of sealant supplied, run an ample amount 3” diameter flue, secure the 6” diameter vent pipe using around the oval flare of the jacket. two sheet metal screws at the connection of the elbow and 6” vertical extension. FIGURE 37 5. Place the 6” vent section over the 3” flue section. Subtract FIGURE 41 3/4” from the X dimension used earlier and this gives the length of the 6” vent exte
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12. Place the water heater at the opening in the wall, at the 17. Connect the vent cap by sliding its end over the 3” diameter predetermined clearance. extension pipe and O-ring. NOTE: To facilitate ease of assembly of the vent cap to the 3” pipe, a soap solution can be applied to the O-ring gasket. FIGURE 50 FIGURE 45 18. The vent cap has 4 holes around the outer edge. Remove 13. Move outdoors with all the remaining vent parts. Using the
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OPTIONAL HORIZONTAL VENT KIT #900124-7 INSTALLATION #3 FIGURE 57 5. Making sure the 6” diameter elbow is centered around the 3” diameter flue, secure the 6” diameter vent pipe using four sheet metal screws at the connection of the jacket top. * Each part is stamped with a part number. FIGURE 53 The opening through the wall should be cut at this time. If it hasn’t been, refer back to that section. FIGURE 58 1. Lock the elbow to
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9. Slide the 6” telescoping vent section apart to reveal the 14. Place the vent cap in the vent collar assembly. beads. NOTE: The section of 6” pipe with beads will connect to the elbow. Using the caulking supplied, fill the beads. FIGURE 67 15. The vent cap has 4 holes around the outer edge. Remove the 4 screws used to temporarily attach the collar to the exterior wall. Then secure the vent cap assembly with the FIGURE 62 vent collar assembly to the exterior wall using
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FIGURE 70 19. Now the 6” vent extension pipes can be expanded to FIGURE 74 connect at the vent elbow. Use the simple equation below, chart and drawing to find the length of expansion of the telescoping flue sections. Because of manufacturing tolerances, place the telescoping extension on the water heater and adjust the height (“X” Dimension) and mark the point. Once the length has been determined, lock th
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8. The standard kit includes a single piece of 3” flue and 6” vent pipe which will not be used in conjunction with the optional horizontal kit. FIGURE 82 FIGURE 77 9. Making sure the 6” diameter elbow is centered around the 3” diameter flue, secure the 6” diameter vent pipe using 4. Using the tube of sealant supplied, run an ample amount two sheet metal screws at the connection of the elbow and around the oval flare of the jacke
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18. The vent cap has 4 holes around the outer edge. Remove the 4 screws used to temporarily attach the collar to the exterior wall. Then secure the vent cap assembly with the vent collar assembly to the exterior wall using the same 4 screws. NOTE: Screws are supplied; however, substitution may be necessary depending on the exterior wall material. FIGURE 86 14. Move outdoors with all the remaining vent parts. Using the tube of sealant supplied,
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FILLING 23. Pull the vent collar from the elbow to be against the wall and secure it using the screws provided. 1. Close the heater drain valve (Fig. 1) by turning handle clockwise. 2. Open a nearby hot water faucet to permit the air in the system to escape. 3. Fully open the cold water inlet pipe valve (Fig. 1) allowing the heater and piping to be filled. FIGURE 96 4. Close the hot water faucet as water starts to flow. 24. Lock the 6” vent extension to the vent elbow by usi
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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 has a pilot which is lit by a piezo-electric • If you cannot reach your gas supplier, call the fire spark gas ignition system. Do not remove the access department. doors of the appliance and try to light the pilot by hand. C. Use only your hand to push in or turn the gas control B. BEFORE LIGHTING
