A.O. Smith 120 trough 500

BTR TANK TYPE HEATERS

SERVICE HANDBOOK

A.O. Smith Water Products Service Handbook

Qualifications: Installation or service of this water heater requires ability equivalent to

that of a licensed tradesman in the field involved. Plumbing, air supply, venting, gas

supply and electrical testing skills are required.

Tools Required:

• Phillips head screwdriver

• standard screwdrivers

• a 3/8 and 7/16 inch open end wrench

• setofmarkeddrillbits

• an electrical multimetertester capable of measuring continuity

• gas pressure gauge or manometer (gauge - AOS pt. no. 8099-2)

• water pressure gauge (AOS pt. no. 4798)

• thermometer (AOS pt no. 4870 -range 0 - 220 degree F)

• 1/2 inch socket with extension for removalo fthe clean out cover,

• 1 1/16 inch socket with extension for anode removal.

MISC: TC-043 Revision1 vs. TC-043

Revision 1:

• Adds Additional model’s information.

• Adds cover statement this Handbook’s also a Service Handbook for many BTC Models.

• Includes Power vent kit information.

• Includes BTR/C-500 gas valve information.

• Updated Damper illustrations.

Revision2:

• Revised Part Numbers on Page 15

Revision 3:

• Adds information unique to the Efflkal damper equipped (Series 110, 111 and

Retrofit) models