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Review Kenmore Energy-star natural gas Water Heater Model 33704Review AO Smith flue damper |
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Kenmore energy-star manual $272 yearly operating cost Warranty 6 years when installed in single-family residential home 6 years tank, 6 years parts Warranty 1 year full replacement with labor for water heater tank that develops leak Warranty 2 years for commercial application such as apartment or business. 1/2" Gas line EF .67 Recovery 40.9 gal per hour 40,000 BTU 50 gallon first hour 81 gallon |
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AO Smith Flue Damper Series/ almost identical to
Kenmore energy-star flue damper Product manual Spec sheet Estimated annual cost Review AO Smith flue damper With brass drain, air intake on side, re-settable FVIR, $272 yearly operating cost 1/2" Gas line EF .67 Recovery 42 gal per hour 40,000 BTU 40 gallon First Hour 67 50 gallon first hour 81 6 year warranty |
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Water heater plugs into 120V outlet. Best to have a dedicated circuit with nothing else on the line, including fluorescent lights. Power surge can knock out gas control that is plugged into outlet so install surge protector. Simple power outage can cause surge. Check outlet with circuit analyzer to ensure proper polarity of outlet. Water heater must be grounded or gas control will not operate. Do not use extension cord. Unit comes with 6 foot cord. |
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Flue
damper increase efficiency Flue damper slows the release of heat during standby. When heater turns ON, the flue damper opens to allow release of toxic gasses. Since flue has a damper, the water heater does not have standing pilot light. Uses hot surface igniter instead. The igniter activates a pilot light that burns only when heater in ON and damper is open. Afterwards, the pilot is turned off. The damper is main reason water heater has higher-than-typical .67 EF energy factor and costs $272 per year to operate. Flue damper series might save $28 per year vrs ordinary gas water heater Compare flue damper series with typical non-dampered water heater has EF .60 and costs $300 per year to operate How to install gas water heater |
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Flue
damper raises height of vent pipe. Draft hood installation page 20 manual Cut old vent pipe using tin snips. Connect vent pipe using 3 sheet metal screws. All vents should have 3 screws per joint and be made of approved mater such as galvanized steel or stainless steel. Do not use aluminum vent pipe. Aluminum is NOT code for water heater, and is used on clothes dryer. |
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 This means combustion air intake is located on bottom of water heater. Stand water heater on bricks so air intake screen can be cleaned once per year. Do NOT install water heater in dusty environment. Today's gas water heaters need plenty of fresh air, and air intakes must be kept clean. Adding bricks will raise height of water heater by 2-1/2" How to install gas water heater |
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 Today's gas water heaters have FVIR systems to prevent flashover or explosion of flammable vapors, such as gasoline. The FV sensor located at bottom of heater will turn off heater operation if gasoline vapors are sensed. It only responds to gasoline vapors, but not other flammable vapors. The FV is a repairable item if water or dirt render it non-functional. Should small amounts of flammable vapors enter water heater combustion chamber, the heater should burn it away without problem. If there is an ignition of large amount of vapor, the heater should be able to stop the ignition from accelerating back into room, but heater will be damaged and require replacement afterwards. If water heater is set in drip pan, keep FV sensor higher than top rim of pan so water cannot short out FV system. |
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Plastic
drain valve will last many years. Can be repaired by replacing washer. Drips can be fixed by installing hose cap over end of drain. Always install water heater in drip pan to prevent minor water leaks from causing damage. Professional plumbers prefer brass drain valve, because brass will unscrew from tank without breaking off. How to replace drain valve All water heaters should be flushed each 6 months to prevent sediment build-up How to flush water heater |
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Honeywell gas control valve Product manual How to light water heater page 19 Error codes page 21 31-32 Temperature adjustment page 20-21 Repair parts page 34 manual Troubleshoot page 29 manual Anode rod page 24 Maintenance page 25 |
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| "water heater is a flammable vapors ignition resistant water heater and is designed to reduce the chances of flammable vapors being ignited, gasoline and other flammable substances should never be stored or used in the same vicinity or area containing a gas water heater or other open flame or spark producing appliance. In the event the FV Sensor does not prevent the ignition of flammable vapors, the FVIR System is designed to reduce the risk of flammable vapor-related fires." |
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| "The patented system protects your family by trapping the burning vapors within the water heater combustion chamber through the special flame-arrestor. The burning vapors literally “burn themselves out” without escaping back into the room. In the event of a flammable vapor incident, the FVIR System disables the water heater by shutting off the gas supply to the water heater’s burner and pilot, preventing re-ignition of any remaining flammable vapors in the area." |
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| "Corderite Combustion Containment" known as “C3
Technology™” . The C3 Technology design features a sealed (from non designated air intake openings) combustion chamber and a "flame arrestor" component. |
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| Seven Flash, three second pause Flammable Vapor Sensor (FVS) Lockout P32 of manual Contact qualified service technician to reset the sensor |
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