Contaminated air ^ rust chips, Flammable items – A.O. Smith 960 through 967 User Manual

Page 13

Attention! The text in this document has been recognized automatically. To view the original document, you can use the "Original mode".

BTH S E R V I C E H A N D B O O K

I N S T A L L A T I O N

CONTAMINATED AIR

^ RUST

CHIPS

Along with adequate make-up air, the quality of the air is important. Contaminants in combustion air

can lead to premature heater failure. Vapors from bleaches, soaps, salts, etc. are drawn into the
combustion chamber with the make-up air and, once fired, mix with water vapor in the gasses to
form extremely corrosive hydrochloric or hydrofluoric acid and other corrosive by-products. Dust
drawn in may build up on the blower or clog the main burner ports. Also, be certain to examine the
exterior area around the air intake of a direct vent installation for the contaminants.

FLAMMABLE ITEMS

Flammable items or pressurized containers or any other potentially hazardous articles must never
be placed on or adjacent to the heater. Open containers of flammable material should not be stored

or used in the same room with the heater or in the area of the exterior air intake of a direct vent
installation. Direct venting does not eliminate the need to remove flammable or corrosives from the
area surrounding the heater.

Technical Training Department
TC-044 Revision 6

A. O. Smith Water Products Co.

This manual is related to the following products:

970 through 973 120