Instruction/ maintenance manual of the product ECT-66 A.O. Smith
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1 PRINTED IN THE U.S.A 0207 P ART NO. 1 85762-000 SUPERSEDES P ART NO. 18 4 639-00 2 KEEP THIS MANUAL IN THE POCKET ON HEA TER FOR FUTURE REFERENCE WHEN EVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED. ALL TECHNICAL AND W ARRANTY QUESTIONS: SHOULD BE DIRECTED T O THE LOCAL DEALER FROM WHOM THE WA TER HEA TER WAS PURCHASED.
2 SAFE INST ALLA TION, USE AND SERVICE Y our safety and the safety of others is extremely important in the inst allation, 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.
3 GENERAL SAFETY.
4 Thank Y ou for purchasing this water heater . Properly inst alled and maintained, it should give you years of trouble free service. Abbreviations Found In This Instruction Manual: • ANSI - America.
5 TYPICAL INST ALLA TION FIGURE 1. UPRIGHT S / LOWB O YS COMP ACTS T ABLE TOPS INST ALL V ACUUM RELIEF IN COLD W A TER INLET LINE A S REQUIRED BY LOCAL CODES. INST ALL SUIT ABLE DRAIN P ANS UNDER HEA TERS TO PREVENT DAMAGE DUE TO LEAKAGE. REFER T O WA TER HEA T ER LOCA TION, SEE “INST ALLING THE NEW WA TER HEA TER” SECTION.
6 MIXING V AL VE USAGE W ater (Potable) Heating: All models are considered suitable for water (potable) heating only . HOTTER WA TER CAN SCALD: W ater heaters are intended to produce hot water .
7 INST ALLING THE NEW W A TER HEA TER WA TER PIPING HOTTER W A TER CAN SCALD: W ater heaters are intended to produce hot water. W ater heated to a temperature which will satisfy space heating, clothes washing, dish washing, cleaning and other sanitizing needs can scald and permanently injure you upon cont act.
8 NOTE: T o protect against untimely corrosion of hot and cold water fittings, it is strongly recommended that di-electric unions or couplings be inst alled on this water heater when connected to copper pipe. Figure 3 shows the typical attachment of the water piping to the water heater .
9 TEMPERA TURE- PRESSURE RELIEF VAL V E This heater is provided with a properly certified combination temperature - pressure relief valve by the manufacturer .
10 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.
11 WIRING DIAGRAMS FOR ACTUAL WIRING CIRCUIT OF UNIT - REFERENCE CIRCUIT TYPE LISTED ON RA TING PLA TE. FIGURE 6..
12 WIRING Never use water heater unless it is completely full of water . T o prevent damage to the tank and heating element, the tank must be filled with water . W ater must flow from the hot water faucet before turning on power . Y ou must provide all wiring of the proper size outside of the water heater .
13 TEMPERA TURE ADJUSTMENT T o 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.
14 THERMAL EXP ANSION W ater 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.
15 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.
16 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 thermost at without high limit: Lift out the tab as shown below to unclip the terminal cover from the thermostat.
17 The water passing out of the drain valve may be extremely hot. T o 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.
18 1 1. 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 lef t open when the water heater is in use.
19 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.
20 T ighten threaded connections. Inspect other appliances near water heater . T urn on electrical switch. Check for blown fuses or tripped breaker. Reset. Check for source of trouble and correct. Replace thermostat. Replace thermostats. Replace element.
21 REP AIR P ARTS LIST LOWBOY AND UPRIGHT ELECTRIC MODELS (Single and Dual Element) Key No. Part Description 1 T emperature-Pressure Relief Valve 2 Secondary Anode Rod/Nipple w/Heat T rap* 3 Element w.
22 REP AIR P ARTS LIST WHEN ORDERING REP AIR P ARTS, AL W A YS GIVE THE FOLLOWING INFORMA TION: • MODEL NUMBER • SERIAL NUMBER • VOL T AGE AND ELEMENT W A TT AGE • P AR T DESCRIPTION THIS IS A REP AIR P ARTS LIST , NOT A P ACKING LIST .
23 REP AIR P ARTS LIST T ABLE TOP ELECTRIC MODELS Key No. Part Description 1 Porcelain T o p 2 T emperature and Pressure Relief V alve 3 Primary Anode Rod 4 Upper Thermostat w/Hi Limit 5 Dip T ube 6 Element w/Gasket 7 Element Gasket 8 Thermostat Bracket (ea.
24 RESIDENTIAL ELECTRIC W ARRANTY THIS WARRANTY IS APPLICABLE T O THE ORIGINAL OWNER ONL Y . 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.
25 without invalidating the remainder of the affected provision or the other provisions of this warranty . 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 .
26 NOTES: ___________________________________________________ ___________________________________________________ ___________________________________________________ __________________________________.
27 NOTES: ___________________________________________________ ___________________________________________________ ___________________________________________________ __________________________________.
28 w w w .aosmithwaterheaters.com.
An important point after buying a device A.O. Smith ECT-66 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought A.O. Smith ECT-66 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data A.O. Smith ECT-66 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, A.O. Smith ECT-66 you will learn all the available features of the product, as well as information on its operation. The information that you get A.O. Smith ECT-66 will certainly help you make a decision on the purchase.
If you already are a holder of A.O. Smith ECT-66, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime A.O. Smith ECT-66.
However, one of the most important roles played by the user manual is to help in solving problems with A.O. Smith ECT-66. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device A.O. Smith ECT-66 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
