A.O. Smith SERIES 120

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Service Handbook

PRINTED IN THE U.S.A 0510 318349-000

SERVICING SHOULD ONLY BE PERFORMED BY A QUALIFIED SERVICE AGENT.

COMMERCIAL GAS WATER HEATERS

INSTALLATION CONSIDERATIONS - PRE SERVICE

CHECKS - WATER HEATER CONSTRUCTION -

OPERATION & SERVICE - TROUBLESHOOTING

500 Tennessee Waltz Parkway

Ashland City, TN 37015

INSTALLATION CONSIDERATIONS - PRE SERVICE

CHECKS - OPERATION & SERVICE -TROUBLESHOOTING

MODEL BTR 500/A SERIES 120/121

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A.O. Smith SERIES 120 Specifications

General