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BTR TANK TYPE HEATERS
SERVICE HANDBOOK
A.O. Smith Water Products Service Handbook
Irving, Texas ©2000 Training Department
14
DRAFT INDUCER
Draft inducers can be used with BTR water heaters to mechanically aid a lazy chimney in
vertical vent applications. They are not designed to allow “through-the-wall” vent
installations. (See Power Venter)
SINGLE UNIT INSTALLATION
When mechanically venting, the following items are required:
Qty Description Part No.
1 Draft Inducer (up to 300,000Btuh) 90909
1 Draft Inducer (up to 305,000 thru 500,000 Btuh) 90910
1 Draft Prover Switch 95220
1 Relay Switch 96695