TABLE OF CONTENTS
| Page |
2 | |
FOREWORD | 2 |
GENERALSAFETYINFORMATION |
|
Precautions | 3 |
Grounding Instructions | 3 |
Chemical Vapor Corrosion | 3 |
Liquid Petroleum Models | 3 |
Extended | 3 |
Insulation Blankets | |
HighAltitude Installations | 4 |
Circulating Pump | 4 |
Dishwashing Machine Requirements | 4 |
INSTALLATIONINSTRUCTIONS |
|
RequiredAbility | 4 |
Locating The Heater | |
Clearances | 5 |
Hard Water | 5 |
Air Requirements | 5 |
Venting | 6 |
Thermometers (Not Supplied) | 6 |
Water Potable Heating and Space heating | 6 |
Relief Valve | |
Gas Piping | 7 |
Heater Wiring | 8 |
Wiring Diagram | 8 |
Purging | 9 |
GENERAL SAFETY
INFORMATION
PRECAUTIONS
DO NOT USE THISAPPLIANCE IFANY PART HAS BEEN UNDER WATER. Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water.
IFTHEUNITISEXPOSEDTOTHEFOLLOWING,DONOTOPERATEHEATER UNTIL ALL CORRECTIVE STEPS HAVE BEEN MADE BY A QUALIFIED SERVICEMAN.
1.EXTERNALFIRE.
2.DAMAGE.
3.FIRINGWITHOUTWATER.
4.SOOTING.
Heater must be protected from freezing downdrafts during shutdown periods.
GROUNDING INSTRUCTIONS
This water heater must be grounded in accordance with the National Electric Code and/or local codes. These must be followed in all cases.
This water heater must be connected to a grounded metal, permanent wiring system; or an equipment grounding conductor must be run with the circuit conductors and connected to the equipment grounding terminal or lead on the water heater, see Figure 5.
CHEMICAL VAPOR CORROSION
WARNING
CORROSION OF THE FLUEWAYS AND VENT SYSTEM MAY OCCUR IF AIR FOR COMBUSTION CONTAINS CERTAIN CHEMICAL VAPORS. SUCH CORROSION MAY RESULT IN FAILURE AND RISK OF ASPHYXIATION.
| Page |
Gas Pressure Regulation | 9 |
OPERATION | 9 |
To Operate The Heater | 9 |
Lighting Instructions | 10 |
Temperature Regulation | 11 |
Checking Venting | 11 |
High Temperature | 11 |
SERVICEINFORMATION | |
Main Burner and Igniter | 12 |
Checking Gas Input | 12 |
Vent System | 12 |
Blower Maintenance | 12 |
Relief Valve | |
Hot Water Odor | 13 |
Winter Protection | 13 |
Replacement Parts | 13 |
PREVENTIVEMAINTENANCE | |
Procedure for Periodic Removal Of Lime Deposits | 13 |
Deliming Solvents | 13 |
Tank Cleanout Procedure | |
CHECKLIST | |
Condensation | 15 |
Cathodic | |
Service & Repair | 16 |
TROUBLESHOOTING | |
LIMITEDWARRANTY | 19 |
Spray can propellants, cleaning solvents, refrigerator and air conditioning refrigerants, swimming pool chemicals, calcium and sodium chloride (water softener salt), waxes, and process chemicals are typical compounds which are potentially corrosive. Do not store products of this sort near the heater. Also, air which is brought in contact with the heater should not contain any of these chemicals. If necessary, uncontaminated air should be obtained from remote or outside sources. The limited warranty is voided when failure of water heater is due to a corrosive atmosphere. (Refer to the limited warranty for complete terms and conditions.)
LIQUID PETROLEUM MODELS
Water heaters for propane or liquefied petroleum gas (LPG) are different from natural gas models. A natural gas heater will not function safely on LP gas and no attempt should be made to convert a heater from natural gas to LP gas.
Your
EXTENDED
WARNING
HYDROGENGASCANBEPRODUCEDINAHOTWATERSYSTEMSERVED BYTHISHEATERTHATHASNOTBEENUSEDFORALONGPERIODOFTIME (GENERALLY TWO WEEKS OR MORE). HYDROGEN GAS IS EXTREMELY FLAMMABLE. To reduce the risk of injury under these conditions, it is recommended that the hot water faucet be opened for several minutes at the kitchen sink before using any electrical appliance connected to the hot water system. If hydrogen is present, there will probably be an unusual sound such as air escaping through the pipe as the water begins to flow. THERE SHOULD BE NO SMOKING OR OPEN FLAME NEARTHEFAUCETATTHETIMEITISOPEN.
INSULATION BLANKETS
Insulation blankets available to the general public for external use on gas water heaters are not approved for use on your A.O. Smith water heater. The purpose of an insulation blanket is to reduce the standby heat loss encountered with storage tank water heaters. Your A.O. Smith water
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