A.O. Smith FDVT manual

1 Thank you for buying this energy efficient water heater from A.O. Smith Water Products Company . We appreciate your confidence in our products. Y ou 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 WARNIN[...]

2 CERT AIN MODELS ARE EQUIPPED WITH SIDE PLUMBING CONNECTIONS FOR SP ACE HEA TING. THE HOT AND COLD FITTING ASSEMBLIES (P ART #900126-2) CAN BE ORDERED THROUGH THE MANUFACTURER. REPLACEMENT P ARTS Replacement parts may be ordered through authorized servicers or distributors. Refer to the Y ellow Pages for where to call or contact A. O. Smith W ater[...]

3 GENERAL SAFETY INFORMA TION EXTERNAL DAMAGE Do not operate the water heater until it has been fully checked out by a qualified technician, if the water heater: • Has been exposed to fire or damage. • Displays evidence of sooting. • Produces steam or unusually hot water . If the water heater has been flooded it must be replaced. CHEMICAL V A[...]

4 the heater . Such pans should have a minimum length and width of at least 2 inches greater than the diameter of the heater and should be piped to an adequate drain. Drain pans suitable for these heaters are available from your dealer or A. O. Smith Water Products Company , 5621 W . 1 15th Street, Alsip, IL 60803. Contact us at our website: www .h[...]

5 torque when attaching gas supply pipe to thermostat gas inlet. The thermostat inlet has a pad for use with a backup wrench. Apply joint compounds (pipe dope) sparingly and only to the male threads of pipe joints. Do not apply compound to the first two threads. Use compounds resistant to the action of liquefied petroleum gases. Do not use teflon t[...]

6 FIGURE 5 FIGURE 6 FIGURE 7 FIGURE 8 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 1 1.) VENTING CLEARANCES • 18” minimum in all directions from any obstruction that may interfere. • 18[...]

7 W ARNING At no time can more than one V ertical and/or one Horizontal V ent Kit be used. VERTICAL (EXTENSION KIT) HEIGHT It is simple to determine which kit is needed for vertical height. T ake the total height (to the top of the flue) required and comparing that to “F DIMENSION” in T ABLE 1, it can be determined which kit needs to be used ve[...]

8 T ABLE 2. *See models and rating plate attached to the water heater for specific model number and other detailed information. W ARNING Be sure vent pipe is properly connected to prevent escape of dangerous flue gases which could cause deadly asphyxiation. ALL INST ALLA TIONS For ease of assembly the installation of the various kit combinations ha[...]

9 4. First remove the 3” horizontal extension from the elbow . Starting with the long end (with four securing holes), place the 6” diameter vent elbow over the 3” diameter elbow . Bend the round end “oval” to fit the flared oval end of the jacket top. FIGURE 18 5. Making sure the 6” diameter elbow is centered around the 3” diameter fl[...]

10 FIGURE 26 12 . Four wood screws are supplied to temporarily attach the collar to the exterior wall of the building. However , other types of screws may have to be substituted depending on the material used in the construction of the exterior wall. FIGURE 27 13. Insert the 3” diameter flue extension pipe into the vent collar assembly (flared &a[...]

11 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 the two sections together by drilling t[...]

12 8. Making sure the 6” diameter elbow is centered around the 3” diameter flue, secure the 6” diameter vent pipe using two sheet metal screws at the connection of the elbow and 6” vertical extension. FIGURE 41 9. The standard vent kit includes a 6” diameter extension pipe which is used when “E” dimension over 6 1/2”. FIGURE 42 10. [...]

13 17. Connect the vent cap by sliding its end over the 3” diameter extension pipe and O-ring. NOTE: T o 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 18. The vent cap has 4 holes around the outer edge. Remove the 4 screws used to temporarily attach the collar to the e[...]

14 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. FIGURE 58 6. The standard kit includes a single piece of 3” flue and 6” vent pipe which will not be used in conjunction with the horizontal kit. FIGU[...]

15 14. Place the vent cap in the vent collar assembly . 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 vent collar assembly to the exterior wall using the same 4 screws. NOTE: Screws are supplied; however , subst[...]

16 FIGURE 74 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 the two sections together by[...]

17 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 9. Making sure the 6” diameter elbow is centered around the 3” diameter flue, secure the 6” diameter vent pipe using two sheet metal screws at the connection of the elbow and 6” ver[...]

18 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 91 19. Move indoors to complete the assembly process.[...]

19 FOR YOUR SAFETY READ BEFORE LIGHTING W ARNING If you do not follow these instructions exactly , a fire or explosion may result causing property damage, personal injury or loss of life. LIGHTING INSTRUCTIONS A. This appliance has a pilot which must be lighted by hand. When lighting the pilot, follow these instructions exactly . B. BEFORE LIGHTING[...]

20 TEMPERA TURE REGULA TION DANGER THIS W A TER HEA TER IS EQUIPPED WITH AN ADJUST ABLE THERMOST A T TO CONTROL W A TER TEMPERA TURE. HOT W A TER TEMPERA TURES REQUIRED FOR AUT OMA TIC DISHW ASHER AND LAUNDRY USE CAN CAUSE P AINFUL SCALDING WITH POSSIBLE SERIOUS AND PERMANENT INJURY . THE TEMPERA TURE A T WHICH INJURY OCCURS V ARIES WITH THE PERSON[...]

21 be called to determine the reason for limit operation and thus avoid repeated thermostat replacement. Lower the temperature adjustment dial setting on the new control. VENTING HA VE VENTING SYSTEM CHECKED EVERY SIX MONTHS FOR OBSTRUCTIONS AND/OR DETERIORA TION IN VENT PIPING. TEMPERA TURE & PRESSURE RELIEF V AL VE At least once a year , the [...]

22 TROUBLESHOOTING Please check guidelines below . For your safety , water heater service should be performed only by a qualified service technicia n. Read the GENERAL SAFETY INFORMA TION section first. PROBLEM POSSIBLE MALFUNCTION SERVICE TO BE PERFORMED POSSIBLE SOLUTION NO HOT W A TER 1) No pilot A. No gas to pilot Check gas supply Turn on, chec[...]

23 THIS WARRANTY IS APPLICABLE TO THE ORIGINAL OWNER ONL Y . I f the glass lined tank in this water heater shall prove upon examination by A. O. Smith Corporation (the warrantor) to have leaked during the warranty period in normal residential use, due to natural corrosion from potable water therein, the warrantor will furnish the ORIGINAL OWNER a r[...]

5621 W . 1 15TH STREET , ALSIP , IL 60803 PHONE: 1-800-433-2545 F AX: 1-800-433-2515 www .hotwater .com / email: par ts@hotwater .com[...]