Instruction Manual RESIDENTIAL ELECTRIC WATER HEATERS MODELS 6-120 FOR POTABLE WATER HEATING ONLY NOT SUITABLE FOR SPACE HEATING LISTED GAMA certification applies to all residential electric water heaters with capacities of 20 to 120 gallons. Input rating of 12 Kw or less. 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.
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. Read and obey all safety messages and instructions throughout this manual.
GENERAL SAFETY 3
INTRODUCTION 2. The installation must conform with these instructions and the local code authority having jurisdiction and the requirements of the power company. In the absence of local code requirements follow NFPA-70, the National Electrical Code (current edition), which may be ordered from: National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02269. Thank You for purchasing this water heater. Properly installed and maintained, it should give you years of trouble free service.
TYPICAL INSTALLATION COMPACTS UPRIGHTS / LOWBOYS †ELECTRICAL CONNECTIONS MAY BE LOCATED ON THE TOP OR SIDE, REFER TO YOUR UNIT. ACTUAL MODEL AND ILLUSTRATION MAY VARY DEPENDENT ON MODEL CAPACITY AND TYPE. SOME MODELS HAVE ALTERNATE INLET, OUTLET AND T&P VALVE LOCATIONS. THESE ALTERNATE LOCATIONS ARE IDENTIFIED BY THE LABELING ON THE UNIT. TABLE TOPS INSTALL THERMAL EXPANSION TANK OR DEVICE IF WATER HEATER IS INSTALLED IN A CLOSED WATER SYSTEM.
MIXING VALVE USAGE FIGURE 2. HOTTER WATER CAN SCALD: Water (Potable) Heating: All models are considered suitable for water (potable) heating only. Water heaters are intended to produce hot water. Water heated to a temperature which 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 injured by hot water than others.
3. The water heater should be located so it is not subject to physical damage by moving vehicles or area flooding. • Water supply shut-off devices that activate based on the water pressure differential between the cold water and hot water pipes connected to the water heater. Installation of the water heater must be accomplished in such a manner that if the tank or any connections should leak, the flow will not cause damage to the structure.
NOTE: To protect against untimely corrosion of hot and cold water fittings, it is strongly recommended that di-electric unions or couplings be installed on this water heater when connected to copper pipe. WATER PIPING PRESSURE TEST This section is only for the manufacturer installing the water heater when the installation is to comply with H.U.D. Standards. When testing the water ways, H.U.D.
TEMPERATURE- PRESSURE RELIEF VALVE The Discharge Pipe: • Shall not be smaller in size than the outlet pipe size of the valve, or have any reducing couplings or other restrictions. • Shall not be plugged or blocked. • Shall be of material listed for hot water distribution. • Shall be installed so as to allow complete drainage of both the temperature-pressure relief valve, and the discharge pipe. • Shall terminate at an adequate drain.
T&P VALVE and PIPE INSULATION (On Selected Models) If after manually operating the valve, it fails to completely reset and continues to release water, immediately close the cold water inlet to the water heater, follow the draining instructions, and replace the temperature-pressure relief valve with a new one. FILLING THE WATER HEATER Never use this water heater unless it is completely full of water. To prevent damage to the tank and heating element, the tank must be filled with water.
WIRING DIAGRAMS FOR ACTUAL WIRING CIRCUIT OF UNIT - REFERENCE CIRCUIT TYPE LISTED ON RATING PLATE. FIGURE 6.
WIRING 1. Provide a way to easily shut off the electric power when working on the water heater. This could be with a circuit breaker or fuse block in the entrance box or a separate disconnect switch. 2. Install and connect a circuit directly from the main fuse or circuit breaker box. This circuit must be the right size and have its own fuse or circuit breaker. 3. If metal conduit is used for the grounding conductor: Never use water heater unless it is completely full of water.
TEMPERATURE REGULATION TEMPERATURE ADJUSTMENT To change the temperature setting: NOTE: It is not necessary to adjust the upper thermostat. However, if it is adjusted above the factory set point (120°F (49°C)) it is recommended that it not be set higher than the lower thermostat setting. HOTTER WATER CAN SCALD: Water heaters are intended to produce hot water.
FOR YOUR INFORMATION Do not remove the anode leaving the tank unprotected. By doing so, all warranty on the water heater tank is voided. THERMAL EXPANSION “AIR” IN HOT WATER FAUCETS Water supply systems may, because of such events as high line pressure, frequent cut-offs, the effects of water hammer among others, have installed devices such as pressure reducing valves, check valves, back flow preventers, etc. to control these types of problems.
PERIODIC MAINTENANCE ANODE ROD INSPECTION If after manually operating the valve, it fails to completely reset and continues to release water, immediately close the cold water inlet to the water heater, follow the draining instructions, and replace the temperature-pressure relief valve with a new one. If the temperature-pressure relief valve on the appliance weeps or discharges periodically, this may be due to thermal expansion.
1. Turn “OFF” the electric power supply to the water heater. 4. Disconnect wires from thermostat and slide out of the bracket. 2. Remove the outer door. Remove or fold up the insulation pad. 5. Remove the thermostat from behind the thermostat bracket. 3. A. 6. Place the new lower thermostat in the bracket making sure it fits firmly against the tank. Models with lower thermostat without high limit: Lift out the tab as shown below to unclip the terminal cover from the thermostat.
The water passing out of the drain valve may be extremely hot. To avoid being scald, make sure all connections are tight and that the water flow is directed away from any person. B. 4. Remove the screw(s) securing the outer door, and remove door. Models with Upper or Lower Thermostat with High Limit: Lift out the tab as shown below to unclip the terminal cover from the thermostat. The terminal cover can now be removed from the thermostat. FIGURE 14. 5. Remove or fold up the insulation. FIGURE 17. 7.
11.Close the water heater drain valve by turning the handle to the right (clockwise). The drain valve is on the lower front of the water heater. 12.Open the cold water supply valve to the water heater. NOTE: The cold water supply valve must be left open when the water heater is in use. 13.To insure complete filling of the tank, allow air to exit by opening the nearest hot water faucet. Allow water to run until a constant flow is obtained. This will let air out of the water heater and the piping. FIGURE 21.
LEAKAGE CHECKPOINTS Read this manual first. Then before checking the water heater make sure the electrical power supply has been turned “OFF” before checking the tank for leakage. *A. Condensation and dripping may be seen on pipes if the water temperature is low in humid weather or pipe connections may be leaking. *B. The anode rod fitting may be leaking. C. Small amounts of water from temperature-pressure relief valve may be due to thermal expansion or high water pressure in your area.
TROUBLESHOOTING GUIDELINES These guidelines should be utilized by a qualified service agent. Problem Possible Cause(s) WATER LEAKS (See Leakage Checkpoints on 19) Improperly sealed, hot or cold supply connection, relief valve or drain valve. Tighten threaded connections. Leakage from other appliances or water lines. Inspect other appliances near water heater. No power to heater. Turn on electrical switch. Check for blown fuses or tripped breaker. High Temperature Limit Switch open. Reset.
REPAIR PARTS LIST Now that you have purchased this water heater, should a need ever exist for repair parts or service, simply contact the company it was purchased from or the manufacturer listed on the rating plate on the water heater. LOWBOY AND UPRIGHT ELECTRIC MODELS (Single and Dual Element) Key No. Part Description 1 Temperature-Pressure Relief Valve Be sure to provide all pertinent facts when you call or visit.
REPAIR PARTS LIST COMPACT OR MANUFACTURED (MOBILE) HOME ELECTRIC MODELS Key No. Part Description 1 Temperature-Pressure Relief Valve 13 Upper Outer Door 2 Outlet Nipple Assembly 14 Upper Thermostat w/Hi/Limit 3 Inlet Nipple 15 Anode Rod 4 Junction Box Cover 16 Drain Valve 5 Upper and Lower Element 17 Base Pan w/Side Drain 6 Element Gasket 18 Conduit Bracket 7 Thermostat Bracket (ea.
REPAIR PARTS LIST TABLE TOP ELECTRIC MODELS Key No. Part Description 1 Porcelain Top 2 Temperature and Pressure Relief Valve 3 Primary Anode Rod 4 Upper Thermostat w/Hi Limit 5 Dip Tube 6 Element w/Gasket 7 Element Gasket 8 Thermostat Bracket (ea.) 9 Terminal Cover 10 Outer Door (ea.
RESIDENTIAL ELECTRIC WARRANTY THIS WARRANTY IS APPLICABLE TO THE ORIGINAL OWNER ONLY. In accordance with the warranty terms and conditions specified below. A. O. Smith Corporation (the warrantor) will furnish the ORIGINAL OWNER, 1) a replacement A. O. Smith water heater of equivalent size and current model if the glasslined tank in this water heater leaks and, 2) a replacement part for any component part which fails. THE A. O.
without invalidating the remainder of the affected provision or the other provisions of this warranty. Dealer replacements are made subject to in-warranty validation by warrantor. SERVICE AND LABOR RESPONSIBILITY PROOF OF PURCHASE AND PROOF OF INSTALLATION DATE ARE REQUIRED TO SUPPORT WARRANTY CLAIM FROM ORIGINAL OWNER. THIS FORM DOES NOT CONSTITUTE PROOF OF PURCHASE OR PROOF OF INSTALLATION. UNDER THIS LIMITED WARRANTY, THE WARRANTOR WILL PROVIDE ONLY A REPLACEMENT WATER HEATER OR PART THEREOF.
NOTES: ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ _____________________________________
NOTES: ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ _____________________________________
www.aosmithwaterheaters.
