Table of Contents
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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.
KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE
WHEN EVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.
PRINTED IN THE U.S.A 0207
Instruction Manual
RESIDENTIAL ELECTRIC
WATER HEATERS
1
MODELS 6-120
FOR POTABLE WATER
HEATING ONLY
NOT SUITABLE FOR
SPACE HEATING
PART NO. 185762-000
SUPERSEDES PART NO. 184639-002
LISTED
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Table of Contents
Related Manuals for A.O. Smith 185762-000
Summary of Contents for A.O. Smith 185762-000
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Page 1: Instruction Manual
KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE WHEN EVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED. PRINTED IN THE U.S.A 0207 Instruction Manual RESIDENTIAL ELECTRIC WATER HEATERS FOR POTABLE WATER NOT SUITABLE FOR SPACE HEATING SUPERSEDES PART NO. 184639-002 MODELS 6-120 HEATING ONLY LISTED PART NO. 185762-000... -
Page 2: Safe Installation, Use And Service
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. -
Page 3: General Safety
GENERAL SAFETY... -
Page 4: Table Of Contents
Thank You for purchasing this water heater. Properly installed and maintained, it should give you years of trouble free service. Abbreviations Found In This Instruction Manual: • ANSI - American National Standards Institute • ASME - American Society of Mechanical Engineers •... -
Page 5: Typical Installation
TYPICAL INSTALLATION UPRIGHTS / LOWBOYS TABLE TOPS INSTALL VACUUM RELIEF IN COLD WATER INLET LINE AS REQUIRED BY LOCAL CODES. COMPACTS †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. -
Page 6: Mixing Valve Usage
Water (Potable) Heating: All models are considered suitable for water (potable) heating only. LOCATING THE NEW WATER HEATER FACTS TO CONSIDER ABOUT THE LOCATION Carefully choose an indoor location for the new water heater, because the placement is a very important consideration for the MIXING VALVE USAGE FIGURE 2. -
Page 7: Insulation Blankets
3. The water heater should be located so it is not subject to physical damage by moving vehicles or area flooding. 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. - Page 8 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. Figure 3 shows the typical attachment of the water piping to the water heater.
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Page 9: Temperature-Pressure Relief Valve
TEMPERATURE- PRESSURE RELIEF VALVE This heater is provided with a properly certified combination temperature - pressure relief valve by the manufacturer. The valve is certified by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment of materials as meeting the requirements for Relief Valves for Hot Water Supply Systems, ANSI Z21.22 •... -
Page 10: Filling The Water Heater
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. -
Page 11: Wiring Diagrams
WIRING DIAGRAMS FOR ACTUAL WIRING CIRCUIT OF UNIT - REFERENCE CIRCUIT TYPE LISTED ON RATING PLATE. FIGURE 6. -
Page 12: Wiring
Never use 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. Water must flow from the hot water faucet before turning on power. You must provide all wiring of the proper size outside of the water heater. -
Page 13: Temperature Regulation
TEMPERATURE REGULATION HOTTER WATER CAN SCALD: 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. -
Page 14: For Your Information
THERMAL EXPANSION 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. When these devices are not equipped with an internal by-pass, and no other measures are taken, the devices cause the water system to be closed. -
Page 15: Periodic Maintenance
PERIODIC MAINTENANCE ANODE ROD INSPECTION The anode rod is used to protect the tank from corrosion. Most hot water tanks are equipped with an anode rod. The submerged rod sacrifices itself to protect the tank. Instead of corroding the tank, water ions attack and eat away the anode rod. -
Page 16: Element Cleaning/Replacement
1. Turn “OFF” the electric power supply to the water heater. 2. Remove the outer door. Remove or fold up the insulation pad. 3. A. Models with lower thermostat without high limit: Lift out the tab as shown below to unclip the terminal cover from the thermostat. - Page 17 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. 4. Remove the screw(s) securing the outer door, and remove door. FIGURE 14.
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Page 18: Drain Valve Washer Replacement
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. -
Page 19: Leakage Checkpoints
LEAKAGE CHECKPOINTS FIGURE 23. 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. -
Page 20: Troubleshooting Guidelines
TROUBLESHOOTING GUIDELINES These guidelines should be utilized by a qualified service agent. Problem WATER LEAKS (See Leakage Checkpoints on 19) NO HOT WATER INSUFFICIENT HOT WATER HIGH OPERATION COSTS SLOW HOT WATER RECOVERY DRIP FROM RELIEF VALVE THERMOSTAT DOES NOT SHUT OFF WATER ODOR WATER HEATER SOUNDS Possible Cause(s) -
Page 21: Repair Parts List
LOWBOY AND UPRIGHT ELECTRIC MODELS (Single and Dual Element) Key No. Part Description Temperature-Pressure Relief Valve Secondary Anode Rod/Nipple w/Heat Trap* Element w/Gasket Element Gasket Lower Outer Door Terminal Cover (Double Element) Upper Thermostat w/Hi Limit (Double Element) Terminal Cover Lower Thermostat w/Hi Limit Terminal Cover Lower Thermostat... - Page 22 COMPACT OR MANUFACTURED (MOBILE) HOME ELECTRIC MODELS Key No. Part Description Temperature-Pressure Relief Valve Outlet Nipple Assembly Inlet Nipple Junction Box Cover Upper and Lower Element Element Gasket Thermostat Bracket (ea.) Lower Thermostat Terminal Cover Lower Thermostat w/Hi Limit Terminal Cover Lower Outer Door * If Applicable ** Not Illustrated...
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Page 23: Repair Parts List
TABLE TOP ELECTRIC MODELS Key No. Part Description Porcelain Top Temperature and Pressure Relief Valve Primary Anode Rod Upper Thermostat w/Hi Limit Dip Tube Element w/Gasket Element Gasket Thermostat Bracket (ea.) Terminal Cover Outer Door (ea.) Lower Thermostat w/Hi Limit Terminal Cover Lower Thermostat Drain Access Door... - Page 24 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.
- Page 25 Replacement Parts may be ordered through authorized servicers or distributors. Refer to your local Yellow Pages for where to call or contact A.O. Smith Corporation, 500 Tennessee Waltz Parkway, Ashland City, TN 37015. Phone: 1.800.433.2545 or visit our website at: www.hotwater.com/parts.
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