A.O. Smith TC-049R3 manuale d’uso

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. TC-049R3 • $15.00 • Printe[...]

RESIDENTIAL GAS AND ELECTRIC WATER HEAT ER SERVICE HANDBOOK TABLE OF CONTENTS Page Introduction Terms .................................................. 1 Tools ................................................... 2 Residential Gas Water Heaters General Information ............................ 3 Installation .........................................[...]

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. If you are experienc ing a problem not covered in this handbook, please contact the[...]

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. The burner or ele[...]

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 8.25 X Temp. Rise X 1.0) divided b[...]

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. Keep Area Clean And Free From Flammables And Flammable Vapors Inn[...]

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. Construction: See also “G eneral” section of this ma[...]

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. The pilot burner remains on once it is manually lit. When incoming col[...]

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. One probe (the shorter) acts as a temperature high limit. If water gets excessively hot, a sensor within the probe opens, interrupts the small electrical cur[...]

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. Operation: A residential water heater is not a precise operating appliance. Because th[...]

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 12.5) cubic fee[...]

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. Turn on every appliance and fan that exhausts air from the utility room and/or house. Make su[...]

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. the main burner, chamber and flue are sooted check the following:  incorrect orifice  excessive gas pressure  loose main burner [...]

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 is heard (only) while the main burner is on,  there is “water” around the heater just after the heater has been operating ,  there are small,[...]

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. “D” – Typically, same or larger diameter as Draft Hood outlet “L” – Horizontal piping slopes upward ¼” per foot from heater to chimney or vertical [...]

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.) Phase II January 1, 2005 30, 40, and 50 gallon power-vented models. (M anufactured housin[...]

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. Combustion air is drawn in throu gh the LDO screen (s). After entering the bottom area of the water heater, this air passes up through t he small po rts of the [...]

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. Possible service issues associated with the flame arres tor.  Poor combu stion – yello[...]

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. Keep in mind this TCO will shut of[...]

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. 4. Remove (2) 3/8 inch nuts secu r[...]

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. 3. Pilot assembly seal conditi on and fit. 4. Sight glass, condition; present, not broken or cr[...]

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 the Sealed Combustion Chambe r section sh ould be performed and the LDO Screen (s) should be inspected for proper installation (a rro ws up) and cleaned[...]

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 WATER DAMAGE DRAIN VALVE UNION FLOOR DRAIN 6” AIR GAP †FUSE SHOULD BE RATED AT AMPERAGE INDICATED ON RATING PLATE TIMES 125% SEE MANUAL AND LABELS [...]

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. TEMPERATURE/PRESSURE REL[...]

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 .577) divided by Volts KW Required = ([...]

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. B. A. C.  Watt Density = the density of the wattage output of the element compared [...]

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. As the tank surface heats or cools, a metal disc inside of the control expands or contracts to open or close electrical contacts in th[...]

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 Thermostat (1) Terminal And High Limit (4) to Element Thermostat 1, 2 is Closed Element is “On” Tank Water is Heated Thermostat 1, 2 Opens C-2 Circuit Pr[...]

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. WIRING DIAGRAM Note: If used on a normally two element heater, [...]

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 CIRCUIT r Power Interrupted to Upper Elemen t Upper Thermostat, 1, 2 Open Switch Power to Lower Thermostat – Upper Thermostat , 1 , 4 Closed Lower Ther[...]

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 . A-6 Circuit - Post 1995 Operation: From cold tank of water Power Enters Hi g h-Limit[...]

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. This circuit allows use of an “Off Peak” meter, which interrupts power [...]

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 Limit And Terminal 3 Of Upper Thermostat Upper High Limit 1, 2 Is Closed Upper Thermostat 3, 4 Is Open Upper Thermostat 1, 2 Is Closed Upper Element Is[...]

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. This circuit permits off-peak meter usage and connection to 3 phase supply circuit. *Inter[...]

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. Upper Thermostat 3, 4 is Open Upper Thermostat 1, 2 is Closed Upper Elemen t is On Top [...]

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 AND APPROVALS UL – UL-174 applies to Residential Electric Water Heaters The following paragraph describes the relationship between ASHRAE, NAECA an[...]

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 cold) Element Wattage Upper/Lower Full Load Current in Amperes Connected to Three Phase Power (Terminal L2/ Terminals L1 & L3 208V 240V 480V 3000[...]

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. Element Procedures: Power to the water heater is "[...]

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. If … … then rated voltage is not present  [...]

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. rated voltage is present  repeat Ohms resistance test of element  check for water leaks in pi[...]

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. Many multimeters could be used to conduct this test but be ce rtain that possible amperage will n[...]

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. A.O. Smith Water Prod[...]

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. Do not set th[...]

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 Voltage Check “No Hot Water” – continued Test between Thermostat 2 and High Limit 4 or T2 and L4 If … … then supply voltage is present: conti[...]

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. Complaint: A [...]

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. three wire, 3 phase circuit: 2. two wir[...]

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. Procedure: Power to the water heater[...]

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). Power on Upper thermostat cal[...]

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. proper voltage is present[...]

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 at least 15  F below lower thermostat setting Test between lower high limit 4 and lower thermostat 2 or low er high limit L4 and lower thermostat T2[...]

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. Many multimeters could be used to conduct this test but be certain that the thermostat is satisfied or the amperage limits of the multimeter may be exc[...]

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 Service Items:  Watts divided by Volts = Amps Supply wire gauge and fuse (breaker) protection must be at least 125% of the e xpected Amperage draw [...]

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. O. Smith website www.aosmihtw aterheaters.com . This information is intended to supplement s[...]

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). Water cannot be compressed. Excessive Pressure in the tank causes failure of joint[...]

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. In gas water heaters, these minerals ?[...]

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. When water hammer occurs, a high intensity pressure wave travel s back through the piping[...]

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  Crackling  Popping CAUSE With the advent of high input and larger stora ge tanks in both commercial and residential heaters, delimin g has become a n[...]

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). CAUSE In a few isolated parts of the United States wh ere the water supply has a relativel y high pH (8+), water con[...]

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. CAUSE Complaints of discolored water are commonly blame d on water heaters and storage tanks, but in fact, it is a rare occurrence for today’s high quality glass lin[...]

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. The bacteri[...]

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. PROCEDURE Please read the steps of the chlorinatio n p[...]

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. This increase was trigge red when changes re[...]

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. For exampl e, heaters are now fact[...]

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.  Hot wate r pipes creak while heater is recoveri ng a[...]

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. The PRV also offer[...]

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 connection  Lea kage at the threaded portion of the relief valve connection  Intermittent weepin g and/or dribbling from the relief valve  Larg e v[...]

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. Date Service Handbook Received: ___month______year Date Returned to the Technical T[...]

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. TC-049R3 • $15.00 • Printe[...]