A.O. Smith GPDH manual

1 P ART NO. 184707-001 GPDH/GPDT/GPDX GAS MODELS with Hot Surface Ignition CAUTION TEXT PRINTED OR OUTLINED IN RED CONT AINS INFORMA TION RELA TIVE T O YOUR SAFETY . PLEASE READ THOROUGHL Y BEFORE INST ALLING AND USING THIS APPLIANCE. KEEP THIS MANUAL IN THE POCKET ON HEA TER FOR FUTURE REFERENCE WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIR[...]

2 GET TO KNOW YOUR W A TER HEA TER REPLACEMENT P ARTS AND DELIMING PRODUCTS A VENT PIPE-EXHAUST B ANODE C HOT W A TER OUTLET D OUTLET (1 15 V . AC) E FLUE BAFFLE F GAS SUPPL Y G MAIN MANUAL GAS SHUT OFF V A L VE H GROUND JOINT UNION J DIRT LEG K OUTER DOOR L UNION M INLET WA TER SHUT OFF V AL VE N COLD WA TER INLET O INLET DIP TUBE P TEMPERA TURE A[...]

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 Canadian S tandards Association, 8501 East Pleasant V alley Road, Cleveland, OH 44131, and both documents are available from the National Fire Protection Association, 1 Batterymarch Park, Quincy , MA 02269. The appliance, when installed, must be electrically grounded in accordance with local codes or in the absence of local codes with the current[...]

5 CLOSED W A TER SYSTEM A closed system will exist if a back-flow preventer (check valve), pressure reducing valve, or other similar device is installed in the cold water line between the water heater and the street main (or well). Excessive pressure may develop due to the thermal expansion of heated water causing premature tank failure or intermit[...]

6 COMBUSTION AIR AND EXHAUST W ARNING WHEN DETERMINING THE INST ALLA TION LOCA TION FOR A POWER DIRECT VENT WA TER HEA TER, SNOW ACCUMULA TION AND DRIFTING SHOULD BE CONSIDERED IN AREAS WHERE APPLICABLE. V enting Through an Outside W all - Clearances • 0" clearance for 3" PVC, ABS, or CPVC Schedule 40 piping from combustible surfaces. ?[...]

7 W ARNING VENT TERMINA TION MUST NOT BE WITHIN 4 FEET (122 cm) OF ANY ITEMS SUCH AS GAS METERS, GAS V AL VES OR OTHER GAS REGULA TING EQUIPMENT . WIRE FENCE When the water heater outlet terminal is low enough to be touched accidentally , or is accessible to small children, a wire mesh chain link fence (as show in Figure 7) may be used. Care should[...]

8 FIGURE 1 1. STANDARD MODELS. * If making an immediate horizontal run of vent off the blower , two 3" PVC or ABS Schedule 40 street elbows are required. 1. The water heater requires its own (separate) venting system. 2. 3" PVC, ABS or CPVC Schedule 40 piping and fittings are acceptable materials for the vent system. 3. It cannot be conne[...]

9 FIGURE 17. Cementing PVC, ABS or CPVC Pipe and Fittings Read and observe all safety information printed on printer , cleaner , and cement container . DANGER Primer , cleaner , and cements are extremely flammable. They are harmful or fatal if swallowed. The vapors are harmful. They may irritate eyes and skin and can be absorbed through the skin. P[...]

10 wall will help minimize discoloration of the wall. Note that the inside flue mounting adaptors must be slipped over the vent piping before locating the pipe through the wall. Before securing the inside and outside collars to the wall, use a silicone sealer between pipe and opening to insure a water and air tight seal. INST ALLA TION SHOWING USE [...]

11 GROUNDED IN ACCORDANCE WITH LOCAL CODES OR IN THE ABSENCE OF LOCAL CODES, WITH THE NA TIONAL ELECTRICAL CODE, ANSI/NFPA 70. If local codes do not permit use of a flexible power supply cord. OPTIONAL Field Installed Wiring 1. Remove screws to remove wiring junction cover . 2. A standard 1/2" conduit opening has been made in the water heater [...]

12 FOR YOUR SAFETY READ BEFORE OPERA TING 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. A . This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burner . Do NOT try to light the pilot by hand.[...]

13 OPERA TION NEVER OPERA TE THE HEA TER WITHOUT FIRST BEING CERT AIN IT IS FILLED WITH W A TER AND A TEMPERA TURE AND PRESSURE RELIEF V AL VE IS INST ALLED IN THE RELIEF V AL VE OPENING OF THE HEA TER. DO NOT A TTEMPT T O OPERA TE HEA TER WITH COLD W A TER INLET V AL VE CLOSED. FILLING 1. Close the heater drain valve by turning handle clockwise, F[...]

14 W A TER HEA TING IGNITION SEQUENCE (Make sure gas and electric power are connected properly) 1. The ignition control module is powered and monitors the system, waiting for a call for heat from the thermostat. 2. The thermostat calls for heat by reading a resistance value within a given range directly proportional to water temperature. 3. The con[...]

15 USERS OF THIS APPLIANCE SHOULD BE A W ARE THA T GAS COMPONENTS WEAR OUT OVER A PERIOD OF TIME. THE GAS CARRYING COMPONENTS OF THIS APPLIANCE SHOULD BE INSPECTED FOR PROPER OPERA TION PERIODICALL Y BY A QUALIFIED SERVICE TECHNICIAN. MAIN BURNER Check main burner every 12 months for proper flame characteristics. This is done by removing door(s) on[...]

16 TROUBLE SHOOTING HELP THERMOST A T AND GAS SUPPL Y CHECK A hydrogen sulfide (rotten egg) odor may result if water contains high sulfate and/or minerals. Chlorinating the water supply should minimize the problem, see EXTENDED NON-USE PERIODS. NOTE: Anode rod must remain installed (except for inspection) to avoid shortening tank life. See LIMITED [...]

17 TROUBLE SHOOTING 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 SOLUTION An open earth ground circuit to the 1. Check that the earth ground connection is ignition system. properly connected. 2. Check th[...]

18 TROUBLE SHOOTING (Continued) PROBLEM CAUSE SOLUTION 1) Blower will not run. A) “ON/OFF” control switch turned off. Turn switch to the “ON” position. B) Blower unplugged. Plug blower back into 1 15 V ac. outlet. C) No power at outlet. Repair service to outlet. D) Thermostat defective. Replace thermostat. E) Control harness defective. Repl[...]

19 THIS WARRANTY IS APPLICABLE TO THE ORIGINAL OWNER ONL Y . If 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 re[...]

20 1 25 SOUTHEAST P ARKWA Y • FRANKLIN, TN 37 068 Phone: 1-800-433-2545 • Fax: 1- 800 - 43 3 -2515 www.aosmithwaterheaters.com / email: parts @hotwater.com[...]