Manuale d’uso / di manutenzione del prodotto TC-049R3 del fabbricante A.O. Smith
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MODELS COVERED 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 Electric W ater Heaters P art No.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK TABLE OF CONTENTS Page Introduction Terms .................................................. 1 Tools ................................................... 2 Residential Gas Water Heaters General Information .
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK The information contained in this handbook is designed to answer commonly faced situations encountered in the operation of the Residential Gas and Electric product line and is not meant to be all-inclusive.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK GENERAL SECTION MISCELLANEOUS INFORMATION Draw ef ficienc y is the quantity of hot water available to the consumer before the outlet water temperature decreases 25 degrees F. A 40 gall on water heater will typically provide 70% (28 gallons) of this “usable” hot water.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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 Ho t = (Mixed Temp. – Cold) divided by (Hot Temp. – Cold) General Section – continued % Thermal Efficiency = (GPH X 8.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Residential Gas – continued Temperature: Two metal probes mounted onto the back of the control are immersed inside the tank water.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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 BTU then a minimum of 500 (40 times 12.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Residential Gas - continued Sooting causes : If … … then the burner is clean but the chamber and/or flue are sooted check for lack of supply air.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Residential Gas - continued Electrical Testing– continued Millivolt dropout test through copper magnet winding and ECO (Emergency Cut Off) Procedure : Move meter probe to upper ECO solder joint and ground If … … then reading of at least 10 MV is not present replace the control valve.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Residential Gas – continued Condensation is a mild acid – it will corrode steel Condensation is usually noted when: water dripping i.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Residential Gas – continued Exhaust Venting Notes Follow current National Fuel Gas Code requirements for proper installation.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK IMPLEMENTATION CATEGORY ANTICIPATED INTRODUCTION CLASS OF PRODUCTS INCLUDED IN THIS CATEGORY Phase I July 1, 2003 30, 40, and 50 gallon atmospheric vente d. (Manufactured housing models are excluded.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK FLAME ARRESTOR Made from Corderite, a fireproof cerami c material, the flame arrestor is built into the base of the water heater.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK If there has been a flammable vapor ignition, a qualif ied service a gent needs to inspect the arrestor for cracks. The arrestor is not a replace able part – the heater woul d need to be replaced.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK The TCO is an integral part of the thermocouple a nd not replaceable as a separate item. A pilot burner assembly must be reinstalled. On repeat ed calls of no hot water or pilot outage, a clogged/dirty LDO screen might be the cause and should be chec ked.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK To replace a pilot assembly: 1. Turn off the gas supply 2. Disconnect the piezo cable from the piez o button (con nection near gas control valve). 3. Disconnect the pilot tubing, thermocou ple and main burner tube from the bottom of the gas control valve.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK A "five point inner door seal inspection" is outlined b elow: Five point inner door seal inspection: 1. Inner door gasket condition and fit. 2. Main burner tube seal condition and fit.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Important Service Reminder Any time service is performed on C3 TECHNO LOGY pr oduct the Five Point Inner Door Seal Inspection outlined in th.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK STANDARD RESIDENTIAL ELECTRIC WATER HEATERS INSTALLATION SOME MODELS MAY HAVE SIDE OR REAR CONNECTIONS INSTALL DRAIN PAN TO PREVENT FUTURE W.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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 to single element models.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK STANDARD RESIDENTIAL ELECTRIC WATER HEATER SERVICE GUIDELINES Construction See “General Section” for features co mmon to both gas and electric models. Miscellaneous : Amperage (Amps) (1 phase) = Watts divided by Volts Amperage (3 phase) = (Watts X .
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Residential Electric – continued Surface Mounted Thermostat (s) and High Limit (s) The thermostats and high limits are held against the side of the tank.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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 Thermos.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Residential Electric – continued A-6 Circuit 2 Elements 2 Thermostats 1 High Limit Operation: From cold tank of water A- 6 CIR.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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 .
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Residential Electric – continued A-7 Circuit 2 Elements 2 Thermostats 2 High Limits 4 wire *Some electrical utilities give discounts if electri city is used during “Off Peak” times of the day.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Residential Electric – continued Cold tank of water Single Electrical Service Single Phase Power Enters Terminal 1 Of Upper High L.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Residential Electric – continued A-7 Circuit 2 Elements 2 Thermostats 2 High Limits 4 Wire WIRING DIAGRAM A-7 – Post 1995 Four wire circuit for non-simultaneous element operation.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Residential Electric – continued Cold tank of water Single Electrical Service Single Phase Fused Disconnect Power to Upper High Limit 1, and Upper Thermostat 3 Upper High Limit 1, 2 is Closed.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK A.O. Smith Water Products Company Technical Training Department © 2005 Ashland City, TN 36 Residential Electric – continued CERTIFICATION.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Residential Electric – continued Three Phase – Unbalanced Circuit SIMULTANEOUS DUAL ELEMENTS (both elements ‘on’ when entire tank is.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Residential Electric – continued C-2 – service continued Complaint: No Hot Water Conditions: Tank water cold Power on Procedure: Multimeter set for AC voltage check Voltage Checks Test voltage between 1 and 3 or L1 and L3 of high limit.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Residential Electric – continued C-2 service “No Hot Water” – continued Test between the two element terminals If … … then rated voltage is not present check wiring from control.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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 elem ent satisfies, power switches to the lower thermostat and element.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Residential Electric – continued A-6 service – continued Testing with the Multimeter Probes installed to test for "voltag e - (black test lead is “common".) Dial set to AC - Voltage scale - set dial to highest voltage scale or scale above the expected voltage.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK A.O. Smith Water Products Company Technical Training Department © 2005 Ashland City, TN 44 Residential Electric – continued A-6 service V.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Residential Electric – continued A-6 service – continued Grounded Element Test – Amperage Method - using “clamp type” Amperage Meter. Many multimeters could be used to conduct this te st but be certain that the amperage limits of the multimeter will not be exceeded.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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 37) 1.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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 th e electrical supply.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Residential Electric – continued A-7 Voltage Check Voltage Checks These tests are conducted on the heater, below the junction box. Complaint: No Hot Water Test Conditions: Tank is full of cold water (or at least 15 F below the upper th ermostat setting).
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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 upper thermostat.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Residential Electric – continued A-7 service – Voltage Checks “Lack of Hot Water” – continued Test Condition Lower tank water is a.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK Residential Electric – continued A-7 – continued Grounded Element Test – Amperage Met hod – Using “clamp type” Amperage Meter.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK A.O. Smith Water Products Company Technical Training Department © 2005 Ashland City, TN 52 Miscellaneous Residential Electric Water Heater .
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK A.O. SMITH TECHNICAL BULLETINS The following are bulletins designed to hel p service the standard, residential gas and electric model water heaters. These bulletins and more are available on the A.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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).
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK WHY WATER HEATER TANKS LE AK - 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 HEAT ER 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 pi peline is stopped abruptly.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK A.O. Smith Water Products Company Technical Training Department TECHNICAL BULLETIN BULLETIN 13 MINERAL BUILD-UP SYMPTOMS Rumbling Cr.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK TECHNICAL BULLETIN BULLETIN 14 ALUMINUM HYDROXIDE SYMPTOMS “Crackling”, “gurgling”, or “poppi ng” noises from new water heaters (installed less than six months).
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK TECHNICAL BULLETIN BULLETIN 21 DISCOLORED WATER SYMPTOMS Rusty, brown, black, or yellow water appearin g in the hot water.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK TECHNICAL BULLETIN BULLETIN 22 SMELLY WATER CAUSE The most common cause of “smelly wa ter” is a non-toxic sulfate redu cing bacteria, scientifically termed Divibri o Sulfurcan s . This bacteria often enters the water system through construction or a break in ground pi ping.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK TECHNICAL BULLETIN BULLETIN 23 CHLORINATION PROCEDURE CAUSE The chlorination pro cedure is used to eliminate various bacteria that accumulate and grow in water heaters. These bacteria often cause odorous or discolored water conditions.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER 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 a re becoming more frequent in the water heater industry.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK TECHNICAL BULLETIN BULLETIN 36 NOT ENOUGH HOT WATER - ELECTRIC CAUSE Not enough hot water complaints a re becoming more frequent in the water heater industry. This increase was trigge red when changes required by our regulato ry agencies were implemented.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK TECHNICAL BULLETIN BULLETIN 45 THERMAL EXPANSION SYMPTOMS Effects are o nly noticeable after hot wate r use followed by periods of no water use. Relief valve d rips during any recovery cycle when no hot or cold water is used.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK THE FIX The ideal fix involves the use of a pressu re reducing valve if supply pressures a re above 60 to 70 psi, and a properly sized expansion tank. The PRV reduces su pply pressures to 40 to 60 psi allowing an economi cally priced and sized expansion t ank to be used.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK TECHNICAL BULLETIN BULLETIN 52 LEAKING TEMPERATURE AND PRESSURE RELIEF VALVE SYMPTOMS Wate r seeping around the relief valve tank connec.
RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK PLEASE DO NOT RETURN THIS INFO RMATION UNTIL YO U 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.
MODELS COVERED 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 Electric W ater Heaters P art No.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il A.O. Smith TC-049R3 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del A.O. Smith TC-049R3 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso A.O. Smith TC-049R3 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul A.O. Smith TC-049R3 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il A.O. Smith TC-049R3, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del A.O. Smith TC-049R3.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il A.O. Smith TC-049R3. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo A.O. Smith TC-049R3 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
