A.O. Smith 120 trough 500 Service Handbook page 3

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
• set of marked drill bits
• an electrical multimeter tester 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 removal of the clean out cover,
• 1 1/16 inch socket with extension for anode removal.
MISC: TC-043 Revision 1 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:
Revision 3:
A.O. Smith Water Products
Irving, Texas ©2000
BTR TANK TYPE HEATERS
SERVICE HANDBOOK
•
Revised Part Numbers on Page 15
•
Adds information unique to the Efflkal damper equipped (Series 110, 111 and
Retrofit) models
2
Service Handbook
Training Department