Should the main burner or burner air openings require cleaning, remove the burner and clean with a soft brush. Clean main burner orifice with a suitable soft material.
CHECKFORGOODFLOWOFCOMBUSTIONANDVENTILATINGAIRTO THE UNIT. MAINTAIN A CLEAR OPEN AREA AROUND THE HEATER AT ALLTIMES. DONOTSTORECOMBUSTIBLESORFLAMMABLELIQUIDS NEAR OR AROUND AN APPLIANCE.
IGNITER MAIN BURNER
FIGURE 12 - MAIN BURNER AND IGNITER ASSEMBLY
CONDENSATION
Water vapor can condense on the cooler surfaces of the tank forming droplets, these drip into the fire or run out on the floor. This is common at the time of startup after installation, during periods of time when incoming water is very cold, or the heater may be undersized for the requirements.
Droplets from the bottom of the flue may be due to corrosive combustion products or improper vent. Check with your dealer for more information.
CATHODIC PROTECTION-ANODE
The anode rod within the tank is designed to be slowly consumed cathodically, minimizing corrosion in the glass lined tank. A hydrogen sulfide (rotten egg) odor may result if water contains high sulfate and/or minerals. Chlorinating the water supply should minimize the problem.
NOTE: Anode must remain installed (except for inspection) to avoid shortening tank life. See LIMITED WARRANTY. Replace as necessary.
SERVICE AND REPAIR
The A.O. Smith water heater requires no special care other than the normal maintenance as noted above. If you are having a problem with your water heater, before calling for service please refer to the following TROUBLESHOOTING sections. If service becomes necessary, contact your dealer, installer or an authorized service agent. Do not attempt to repair the water heater yourself. Any work performed by unauthorized personnel may void the warranty.
If you are having a problem with your A.O. Smith water heater and are not pleased with the service you received:
•First, please contact your dealer or the A.O. Smith authorized service agent in your area and explain to them why you are not satisfied. This will usually correct the problem.
•If after working with your dealer or service agent the problem has not been resolved to your satisfaction, please let us know by either writing to us at:
A.O. Smith Water Products Company
Service Department
600 East John Carpenter Freeway
Rochelle Park, Suite 200
Irving, TX 75038
or, going to our website at: www.hotwater.com
Please click on: "Mail",
then click on: "Service" and leave us a message.
Please be sure to provide the following information when writing or
•Model Number
•Serial Number
•Date of Original Purchase
•Date Problem Originated
•Explanation of Problem
Also, please be sure to include a daytime telephone number.
TROUBLE SHOOTING
Water heater may exhibit problems that are unrelated to a malfunction of the water heater itself. The following information and tables may serve to answer your question about a problem that you are having without having to call a service agent.
For your safety, water heater service should be performed only by a qualified service technician. Read the GENERAL SAFETY INFORMATION section first.
WATER HEATING CYCLE
(GAS AND ELECTRIC POWER ARE ON, “OFF/ON” SWITCH IS ON)
1)SMARTVALVE® (1) CALLS FOR HEAT (SEE FIGURES 7 &12)
A)THERMOSTATSENSESNEEDFORHEATINGWATER
B)CONTACTS CLOSE IN THERMOSTAT, POWER (115 VAC) FLOWS TO BLOWER MOTOR
2)BLOWERMOTORROTATESBLOWERWHEEL
A)BLOWERWHEELSPEEDINCREASES
B)WHEELSPEEDINCREASES,AIRPRESSURESWITCH CONTACTS CLOSE
3)120 VAC FLOWS TO HOT SURFACE IGNITER
NOTE:THECONTROLMODULEONTHISUNITWILLTRYAMAXIMUMOF THREETIMESTOLIGHTTHEUNIT. CYCLECANBERESTARTEDATANY TIMEBYTURNINGOFFSWITCHANDTHENTURNINGBACKON. IFUNIT HAS GONE THROUGH THREE CYCLES AND DID NOT LIGHT, THEN REPAIRMANSHOULDBECALLEDTOCHECKOPERATIONOFHEATER.
4)MAINBURNERIGNITES
A)GAS FLOWS TO MAIN BURNER PORTS AND IS IGNITED
5)GAS VALVE SENSES BURNER FLAME
6)BURNERHEATSWATER
A)BURNERHEATSWATERTOTHERMOSTATSETTING
B)CONTACTSINTHERMOSTATOPEN,
C)CYCLEISCOMPLETED
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