A.O. Smith GDVT-50 manual

Instruction Manual PRINTED IN CANADA 0608 P AR T NO. 186589-004 REV . B KEEP THIS MANUAL IN THE POCKET ON HEA TER FOR FUTURE REFERENCE WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED. DIRECT VENT GAS MODELS GDV/GDVT NOT FOR USE IN MANUF ACTURED (MOBILE) HOMES RESIDENTIAL GAS W A TER HEA TERS • For Y our Safety • AN ODORANT IS ADDED T O T[...]

2 SAFE INST ALLA TION, USE AND SERVICE Y our 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. Read and obey all safety m[...]

3 GENERAL SAFETY[...]

4 SAFE INST ALLA TION, USE AND SERVICE . . . . . . . . . . . . . 2 GENERAL SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 T ABLE OF CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Preparing for the installation . . . .[...]

5 GET TO KNOW YOUR W A TER HEA TER REPLACEMENT P ARTS 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 . FIGURE 1 TYPICAL INST AL[...]

6 FIGURE 2 MIXING V AL VE USAGE This appliance has been design certi fi ed as complying with American National Standard/CSA Standard for water heaters and is considered suitable for: W ater (Potable) Heating and Space Heating: All models are considered suitable for water (potable) heating and space heat- ing. HOTTER W A TER CAN SCALD: W ater heate[...]

7 F ACTS TO CONSIDER ABOUT THE LOCA TION 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 eco- nomical use of the appliance. This water heater is not for use in manufactured (mobile) homes or outdoor installation. W[...]

8 INSULA TION BLANKETS Insulation blankets available to the general public for external use on gas water heaters are not necessary with this product. The purpose of an insulation blanket is to reduce the standby heat loss encountered with storage tank water heaters. Y our Water heater meets or exceeds the National Appliance Energy Conser- vation Ac[...]

9 REQUIRED ABILITY INST ALLA TION OR SERVICE OF THIS W A TER HEA TER REQUIRES ABILITY EQUIV ALENT TO THA T OF A LICENSED TRADESMAN IN THE FIELD INVOL VED. PLUMBING, AIR SUPPL Y , VENTING AND GAS SUPPL Y ARE REQUIRED. INSPECT SHIPMENT There may be hidden damage caused in transit. Check to be certain all parts of the venting system, as listed below ,[...]

10 HOT W A TER OUTLET COLD W A TER INTLET DRAIN V AL VE DISCHARGE PIPE (DO NOT CAP OR PLUG) DRAIN P AN 3/4” SWEA T FITTING UNION SHUTOFF VA LV E FLOOR DRAIN 3/4” SWEA T FITTING TEMPERA TURE AND PRESSURE RELIEF V AL VE UNION 6” MAXIMUM AIR GAP FIGURE 5 Figure 5 shows the typical attachment of the water piping to the water heater . The water he[...]

11 distance below the structural fl oor . Be certain that no contact is made with any live electrical part. The discharge opening must not be blocked or reduced in size under any circumstances. Excessive length, over 30 ft. (9.14m), or use of more than four elbows can cause restriction and reduce the discharge capacity of the valve, see Figures 5 [...]

12 minimum inlet gas pressure shown on the rating plate is that which will permit fi ring at rated input. All gas piping must comply with local codes and ordinances or with the “Natural Gas and Propane Installation Code” CAN/ CSA-B149.1 whichever applies. Copper and brass tubing and fi ttings (except tin lined copper tubing) shall not be used[...]

13 SEDIMENT TRAPS A drip leg (sediment trap) shall be installed as close to the inlet of the water heater as practical at the time of water heater installa- tion. The sediment trap shall be either a tee fi tting with a capped nipple in the bottom outlet or other device recognized as an ef- fective sediment trap. If a tee fi tting is used, it shal[...]

14 COMBUSTION AIR AND VENTILA TION When determining the installation location for a direct vent water heater , snow accumulation and drifting should be considered in areas where applicable. VENT TERMINAL CLEARANCES The vent system must terminate so that proper clearances are maintained as cited in local codes or the current edition of the “Natura[...]

15 DV TERMINA TION SAFETY COVER A Safey cover (see Figure 13) is available to prevent accidental contact with the vent terminal. Contact your Customer Service Department for ordering information. FIGURE 13 VENT CONNECTIONS After the location for the vent terminal has been selected as outlined in Figures 3, 4 & 12, use the following illustration[...]

16 ST ANDARD VENT ARRANGEMENT 2.6 in. (67mm) 3.6 in. (91mm) 2.1 in. (54.5mm) WALL 17 in. (432mm) MIN.,* 80 in. (2.03m) MAX. FIGURE 17 * If the horizontal distance is less than 760mm (30 in.), the restricter plate must be installed (see Figure 22). VENT ASSEMBL Y The vent tube and terminal can be assembled as shown in Figure 18. There are springs fa[...]

17 FIGURE 23 Apply hi-temp red silicone (included) around the collar on air manifold box. Pull corrugated vent tube all the way on to collar and secure with one sheet metal screw (approx. 19mm (3/4 in.) up from edge of vent tube. Pull gear clamp past screw and tighten. FIGURE 24 Check the level or slope of the venting again, and adjust if required.[...]

18 1. STOP! Read the safety information above on this label. 2. Set the thermostat to lowest setting. 3. This appliance has a pilot that is lit by a sp ark gas ignition system. Do not try to light the pilot by hand. 4. Remove the outer burner door . 5. Push the gas control knob down slightly and turn clockwise to "OFF" (see Figure "A[...]

19 TEMPERA TURE REGULA TION TEMPERA TURE REGULA TION HOT W A TER CAN SCALD: W ater heaters are intended to produce hot water . Water heated to a temperature that will satisfy space heating, clothes washing, dish washing, and other sanitizing needs can scald and permanently injure you upon contact. Some people are more likely to be permanently injur[...]

20 EXTERNAL DAMAGE Do not operate the water heater until it has been fully checked out by a quali fi ed technician, if the water heater: • Has been exposed to fi re or damage. • Displays evidence of sooting. • Produces steam or unusually hot water . If the water heater has been fl ooded it must be replaced. ST ART UP CONDITIONS NEVER OPERA[...]

21 lines. Contact the local water heater supplier or service agency for further information concerning an Anode Replacement Kit and this chlorination treatment. If the smelly water persists after the anode replacement and chlorination treatment, we can only suggest that chlorination or aeration of the water supply be considered to eliminate the wat[...]

22 FOR YOUR SAFETY AND SA TISF ACTOR Y OPERA TION, IT IS RECOMMENDED THA T THIS HEA TER BE CHECKED ONCE A YEAR BY A COMPETENT SER VICE PERSON. USERS OF THIS APPLIANCE SHOULD BE AWARE THAT GAS COMPONENTS WEAR OUT OVER A PERIOD OF TIME. THE GAS CARRYING COMPONENTS OF THIS APPLIANCE SHOULD BE INSPECTED FOR PROPER OPERA TION PERI- ODICALL Y BY A QUALIF[...]

23 TEMPERA TURE & PRESSURE RELIEF V AL VE At least once a year , the temperature and pressure relief valve, Figure 1, must be checked to ensure that it is in operating condi- tion. Lift the lever at the top of the valve several times until the valve seats properly and operates freely . If water does not fl ow , remove the valve and inspect for[...]

24 Before removing the anode: 1) the tank water should be cool, 2) the cold water shut off valve must be closed, and 3) water pres- sure must be relieved by opening a nearby faucet. DRAIN V AL VE W ASHER REPLACEMENT (See Figure 29) 1. T urn “OFF” gas supply to water heater . 2. Follow “Draining” instructions. 3. T urning counterclockwise ( [...]

25 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. If you are not thoroughly familiar with [...]

26 TROUBLESHOOTING GUIDELINES PROBLEM POSSIBLE CA USE(S) CORRECTION BURNER WILL NOT IGNITE 1. Pilot not lit 2. Thermostat set too low 3. No gas 4. Dirt in the gas lines 5. Pilot line clogged 6. Main burner line clogged 7. Defective thermocouple 8. Defective gas control/thermostat 9. Heater installed in a con fi ned area 1. Light pilot 2. T urn tem[...]

27 PROBLEM POSSIBLE CA USE(S) CORRECTION SLOW HOT W A TER RECOV - ERY 1. Insuf fi cient secondary air 2. Flue clogged 3. Low gas pressure 4. Improper calibration 5. Gas control/thermostat set too low 6. W ater heater too small 7. W rong piping connections 8. W asted hot water 1. Provide ventilation to water heater . Check fl ue way , fl ue baf ?[...]

28 NOTES[...]

29 RESIDENTIAL GAS W ARRANTY THIS W ARRANTY IS APPLICABLE TO THE ORIGINAL OWNER ONL Y in accordance with the warranty terms and conditions speci fi ed below . The warrantor will furnish the ORIGINAL OWNER, 1) a replacement water heater of equivalent size and cur- rent model if the glass-lined tank in this water heater leaks and, 2) a replacement p[...]

30 SERVICE AND LABOR RESPONSIBILITY UNDER THIS LIMITED W ARRANTY , THE W ARRANTOR WILL PROVIDE ONL Y A REPLACEMENT W A TER HEA TER OR P ART THEREOF . THE OWNER IS RESPONSIBLE FOR ALL OTHER COSTS. Such costs may include but are not limited to: a. Labor charges for service, removal, or reinstallation of the water heater or part thereof. b. Shipping a[...]

31 500 TENNESSEE W AL TZ P ARKW A Y ASHLAND CITY , TN 37015 PHONE: 1-800-433-2545 F AX: 1-800-433-2515 www .aosmithwaterheaters.com / email: parts@hotwater .com[...]