Table Of Contents; General Safety Information; Precautions; Chemical Vapor Corrosion - A.O. Smith BT- 80 Installation & Operating Instructions Manual

TABLE OF CONTENTS

ROUGH-IN DIMENSIONS ................................................................... 2
FOREWORD ........................................................................................ 2
GENERAL SAFETY INFORMATION ................................................... 3-4
Precautions ....................................................................................... 3
Chemical Vapor Corrosion ............................................................... 3
Improper Combustion ....................................................................... 3
Liquid Petroleum Models .................................................................. 3-4
Extended Non-use Periods .............................................................. 4
Insulation Blankets ........................................................................... 4
Circulating Pump .............................................................................. 4
INSTALLATION INSTRUCTIONS ........................................................ 4-9
Required Ability ................................................................................. 4
Locating The Heater ......................................................................... 4-5
High Altitude Installations ................................................................. 5
Clearances ....................................................................................... 5
Hard Water ....................................................................................... 5
Air Requirements .............................................................................. 5-6
Water (Potable) Heating and Space Heating ................................... 6
Venting .............................................................................................. 6-7
Thermometers (Not Supplied) .......................................................... 7
Relief Valve ....................................................................................... 7
Gas Piping ........................................................................................ 8-9
Gas Pressure Regulator ................................................................... 9
GENERAL SAFETY
INFORMATION

PRECAUTIONS

DO NOT USE THIS APPLIANCE IF ANY 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.
IF THE UNIT IS EXPOSED TO THE FOLLOWING, DO NOT
OPERATE HEATER UNTIL ALL CORRECTIVE STEPS HAVE BEEN
MADE BY A QUALIFIED SERVICEMAN.
1. EXTERNAL FIRE.
2. DAMAGE.
3. FIRING WITHOUT WATER.
4. SOOTING

CHEMICAL VAPOR CORROSION

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.
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.)
WARNING
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OPERATION ........................................................................................ 9-13
To Operate The Water Heater ......................................................... 9
Purging ............................................................................................ 9
Lighting Instructions ........................................................................ 10-11
Temperature Regulation .................................................................. 12
Check Venting ................................................................................. 12-13
High Temperature Limit Switch ....................................................... 13
SERVICE INFORMATION ................................................................... 13-14
Pilot and Main Burner ...................................................................... 13
Checking Gas Input ......................................................................... 13-14
Vent System .................................................................................... 14
Relief Valve ...................................................................................... 14
Hot Water Odor ............................................................................... 14
Anode Rod Inspection ..................................................................... 14
Winter Protection ............................................................................. 14
Replacement Parts .......................................................................... 14
PREVENTIVE MAINTENANCE .......................................................... 15-16
Recommended Procedure For Periodic Removal Of Lime
Deposits From Tank Type Commercial Water Heaters .................. 15
Deliming Solvents ............................................................................ 15
Tank Cleanout Procedure ................................................................ 15-16
CHECKLIST ......................................................................................... 16-17
LIMITED WARRANTY .......................................................................... 18

IMPROPER COMBUSTION

ATTIC AND/OR EXHAUST FANS OPERATING ON THE PREMISES
WITH A WATER HEATER CAN RESULT IN CARBON MONOXIDE
POISONING AND DEATH.
OPERATION OF THESE FANS CAN PRODUCE A NEGATIVE
DRAFT IN THE AREA OF THE WATER HEATER PREVENTING
THE PRODUCTS OF COMBUSTION FROM EXHAUSTING
THROUGH THE CHIMNEY OR VENT PIPE.
The venting of the water heater should be inspected by a qualified
service technician at the time of installation and periodically thereafter
to ensure a down-draft condition does not exist.
DO NOT OBSTRUCT THE FLOW OF COMBUSTION AND
VENTILATING AIR. ADEQUATE AIR FOR COMBUSTION AND
VENTILATION MUST BE PROVIDED FOR SAFE OPERATION.

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.
LP gas must be used with great caution. It is highly explosive
and heavier than air. It collects first in the low areas making its
odor difficult to detect at nose level. If LP gas is present or
even suspected, do not attempt to find the cause yourself. Go
to a neighbor's house, leaving your doors open to ventilate the
house, then call your gas supplier or service agent. Keep area
clear until a service call has been made.
At times you may not be able to smell an LP gas leak. One
cause is odor fade, which is a loss of the chemical odorant that
gives LP gas its distinctive smell. Another cause can be your
physical condition, such as having a cold or diminishing sense
of smell with age. For these reasons, the use of a propane gas
detector is recommended.
3
WARNING
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