A.O. Smith TC-049R3 - Manuals

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK One gallon of (120 ° F, 49 ° C) water weighs approximately 8.25 pounds. Pounds X .45359 = Kilogram Gallons X 3.7854 = Liters % of Hot = (Mixed Temp. – Cold) divided by (Hot Temp. – Cold) General Section – continued % Thermal Efficiency = (GP...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK INSTALLATION OF RESIDENTIAL GAS WATER HEATER Typical Model and Rating Plate Location Union Minimum 4.5” w.c. –Natural Gas 11.0” w.c. Propane Gas Maximum Gas Supply 13.8” w.c. or ½ PSI Air Is Drawn In For Combustion. Keep Area Clean And Free ...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK RESIDENTAL GAS WATER HEATER SERVICE This portion of this manual applies to the Operations and Servicing of Residential Gas, Tank Type, Water Heaters, which are vented atmospherically and use a thermocouple as their electrical source. Constru...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Gas – continued Burner: The burner assembly consists of the main burner, main burner orifice, main burner gas supply tube, pilot burner, pilot burner orifice, pilot burner gas supply tube and thermocouple. The pilot burner remain...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Gas – continued Temperature: Two metal probes mounted onto the back of the control are immersed inside the tank water. One probe (the shorter) acts as a temperature high limit. If water gets excessively hot, a sensor within the p...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Gas - continued Water Flow: When a hot water faucet is opened, water pressure from the well tank or street main forces cold water into the water heater. This pushes hot water out of the tank. Operation: A residential water heater...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Gas - continued Service: Air: A gas burning appliance requires the oxygen contained in 12.5 cubic feet of air (at sea level) for every 1000 BTU of heat that is generated. If your water heater has a BTU per hour input of 40,000 BT...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Gas – continued The instruction manual gives guidelines under “Air Requirements” and “Unconfined “ or “Confined Space” sections. If you want to test for a lack of air: 1. Turn on every appliance and fan that exhausts air from the...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Gas – continued Condensation is a mild acid – it will corrode steel Condensation is usually noted when: • water dripping is heard (only) while the main burner is on, • there is “water” around the heater just after the heater has ...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Gas – continued Exhaust Venting Notes Follow current National Fuel Gas Code requirements for proper installation. “D” – Typically, same or larger diameter as Draft Hood outlet “L” – Horizontal piping slopes upward ¼” per foot fro...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK IMPLEMENTATION CATEGORY ANTICIPATED INTRODUCTION CLASS OF PRODUCTS INCLUDED IN THIS CATEGORY Phase I July 1, 2003 30, 40, and 50 gallon atmospheric vented. (Manufactured housing models are excluded.) Phase II January 1, 2005 30, 40, and 50 g...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK If there has been a flammable vapor ignition, a qualified service agent needs to inspect the arrestor for cracks. The arrestor is not a replaceable part – the heater would need to be replaced. Possible service issues associated with the flam...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK To replace a pilot assembly: 1. Turn off the gas supply 2. Disconnect the piezo cable from the piezo button (connection near gas control valve). 3. Disconnect the pilot tubing, thermocouple and main burner tube from the bottom of the gas con...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK A "five point inner door seal inspection" is outlined below: Five point inner door seal inspection: 1. Inner door gasket condition and fit. 2. Main burner tube seal condition and fit. 3. Pilot assembly seal condition and fit. 4. Sigh...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Important Service Reminder Any time service is performed on C3 TECHNOLOGY product the Five Point Inner Door Seal Inspection outlined in the Sealed Combustion Chamber section should be performed and the LDO Screen (s) should be inspected for ...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK STANDARD RESIDENTIAL ELECTRIC WATER HEATERS INSTALLATION SOME MODELS MAY HAVE SIDE OR REAR CONNECTIONS INSTALL DRAIN PAN TO PREVENT FUTURE WATER DAMAGE DRAIN VALVE UNION FLOOR DRAIN 6” AIR GAP †FUSE SHOULD BE RATED AT AMPERAGE INDICATED ON R...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK STANDARD RESIDENTIAL ELECTRIC WATER HEATERS This portion of this manual applies to the Operation and Servicing of Residential Electric, Tank Type, Water Heaters. The illustrations are for two element models but the information also applies t...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK STANDARD RESIDENTIAL ELECTRIC WATER HEATER SERVICE GUIDELINES Construction See “General Section” for features common to both gas and electric models. Miscellaneous : Amperage (Amps) (1 phase) = Watts divided by Volts Amperage (3 phase) = (Wa...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Electric – continued Since the element (s) are - very nearly - totally immersed in the tank, thermal efficiency is assumed to be 100%. – all of the Btu (Watts) generated, enter the water. B. A. C. • Watt Density = the density of ...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Electric – continued Power Enters High Limit 1 and 3 Through High Limit 1, 2 and 3, 4 Through High Limit (2) Jumper to Thermostat (1) Terminal And High Limit (4) to Element Thermostat 1, 2 is Closed Element is “On” Tank Water is ...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Electric – continued Normal Sequence of Operation C-2 Circuit – Standard on most single element water heaters. • Single Element • Single Thermostat • Single High Limit Operation from a cold tank of water. WIRING DIAGRAM Note: If ...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Electric – continued A-6 Circuit • 2 Elements • 2 Thermostats • 1 High Limit Operation: From cold tank of water A-6 CIRCUIT r Power Interrupted to Upper Element Upper Thermostat, 1, 2 Open Switch Power to Lower Thermostat – Upper...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Electric – continued WIRING DIAGRAM A-6 Circuit • 2 Elements • 2 Thermostats • 1 High Limit A-6 Circuit - Standard on dual element water heaters non-simultaneous/interlocked operation . A-6 Circuit - Post 1995 Operation: From col...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Electric – continued Cold tank of water • Single Electrical Service • Single Phase Power Enters Terminal 1 Of Upper High Limit And Terminal 3 Of Upper Thermostat Upper High Limit 1, 2 Is Closed Upper Thermostat 3, 4 Is Open Upper...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK A.O. Smith Water Products Company Technical Training Department © 2005 Ashland City, TN 36 Residential Electric – continued CERTIFICATION AND APPROVALS UL – UL-174 applies to Residential Electric Water Heaters The following paragraph describ...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Electric – continued Three Phase – Unbalanced Circuit SIMULTANEOUS DUAL ELEMENTS (both elements ‘on’ when entire tank is cold) Element Wattage Upper/Lower Full Load Current in Amperes Connected to Three Phase Power (Terminal L2/ ...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Electric – continued SERVICE Testing C-2 type – single element, single controls type circuit Element Test OHMS Resistance Check ** Test Conditions: This test uses the multimeter's battery as the electrical supply. Element Procedu...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Electric – continued C-2 – service “Water Too Hot” – continued Grounded Element Check – Amperage Method Grounded Element Test – using “clamp type” Amperage Meter. Many multimeters could be used to conduct this test but be certain...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Electric – continued A-6 Circuit Servicing Testing A-6 - two element, two thermostat, one high limit, two wire circuit type water heaters. Wired non-simultaneously – When the upper element satisfies, power switches to the lower t...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Electric – continued Testing The A-7 Wiring Circuit A-7 Circuit: Two elements Two thermostats Two high limits Four wires Non-simultaneous operation or simultaneous Prior To 1996 Post 1995 Supply wiring may be a: (See Pages 34 and...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Electric – continued A-7 Service – continued Element Test OHMS Resistance Check ** Element Test Conditions: Element(s) not heating or water becoming excessively hot. This test uses the multimeter's battery as the electrical suppl...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Electric – continued A-7 Voltage Check - continued Complaint: Lack of Hot Water Test Conditions: Upper thermostat satisfied Test between upper high limit 4 and upper thermostat 4 If … … then proper voltage is not present replace ...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Electric – continued A-7 service – Voltage Checks “Lack of Hot Water” – continued Test Condition Lower tank water is at least 15 ° F below lower thermostat setting Test between lower high limit 4 and lower thermostat 2 or lower h...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK Residential Electric – continued A-7 – continued Grounded Element Test – Amperage Method – Using “clamp type” Amperage Meter. Many multimeters could be used to conduct this test but be certain that the thermostat is satisfied or the amperage...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK A.O. Smith Water Products Company Technical Training Department © 2005 Ashland City, TN 52 Miscellaneous Residential Electric Water Heater Service Items: • Watts divided by Volts = Amps Supply wire gauge and fuse (breaker) protection must be...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK A.O. Smith Water Products Company Technical Training Department © 2005 Ashland City, TN 54 WHY WATER HEATER TANKS LEAK WHAT WHY PREVENTION Water Pressure Water expands when it is heated (Thermal Expansion). Water cannot be compressed. Excess...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK WHY WATER HEATER TANKS LEAK - Continued WATER CONDITIONS WHAT WHY PREVENTION “Hard” Water (Gas Water Heaters) “Hard” water contains minerals. As water is heated the minerals separate from the water and attach to hot surfaces within the tank....

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK TECHNICAL BULLETIN BULLETIN 11 WATER HAMMER GENERAL Water hammer is the destructive forces, pounding noises and vibration in a piping system when water flowing through a pipeline is stopped abruptly. When water hammer occurs, a high intensit...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK TECHNICAL BULLETIN BULLETIN 14 ALUMINUM HYDROXIDE SYMPTOMS “Crackling”, “gurgling”, or “popping” noises from new water heaters (installed less than six months). CAUSE In a few isolated parts of the United States where the water supply has a ...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK TECHNICAL BULLETIN BULLETIN 21 DISCOLORED WATER SYMPTOMS Rusty, brown, black, or yellow water appearing in the hot water. CAUSE Complaints of discolored water are commonly blamed on water heaters and storage tanks, but in fact, it is a rare ...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK TECHNICAL BULLETIN BULLETIN 22 SMELLY WATER CAUSE The most common cause of “smelly water” is a non-toxic sulfate reducing bacteria, scientifically termed Divibrio Sulfurcans . This bacteria often enters the water system through construction ...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK TECHNICAL BULLETIN BULLETIN 23 CHLORINATION PROCEDURE CAUSE The chlorination procedure is used to eliminate various bacteria that accumulate and grow in water heaters. These bacteria often cause odorous or discolored water conditions. PROCED...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK A.O. Smith Water Products Company Technical Training Department © 2005 Ashland City, TN 62 TECHNICAL BULLETIN BULLETIN 35 NOT ENOUGH HOT WATER - GAS CAUSE Not enough hot water complaints are becoming more frequent in the water heater industr...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK TECHNICAL BULLETIN BULLETIN 36 NOT ENOUGH HOT WATER - ELECTRIC CAUSE Not enough hot water complaints are becoming more frequent in the water heater industry. This increase was triggered when changes required by our regulatory agencies were i...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK TECHNICAL BULLETIN BULLETIN 45 THERMAL EXPANSION SYMPTOMS • Effects are only noticeable after hot water use followed by periods of no water use. • Relief valve drips during any recovery cycle when no hot or cold water is used. • Hot water pi...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK TECHNICAL BULLETIN BULLETIN 52 LEAKING TEMPERATURE AND PRESSURE RELIEF VALVE SYMPTOMS • Water seeping around the relief valve tank connection • Leakage at the threaded portion of the relief valve connection • Intermittent weeping and/or drib...

RESIDENTIAL GAS AND ELECTRIC WATER HEATER SERVICE HANDBOOK PLEASE DO NOT RETURN THIS INFORMATION UNTIL YOU HAVE HAD THIS SERVICE HANDBOOK AT LEAST 6 MONTHS. Please assist us in making this Service Handbook more useful to you by completing and returning this page. Date Service Handbook Received: ___m...

M O D E L S C O V E R E D Residential Gas Water Heaters that are atmospherically vented and use a thermocouple as their electrical source. Residential Electric Water Heaters having one or two heating elements and common wiring configurations for these models. SERVICE HANDBOOK Residential Gas and Ele...