Direct Venting - All Models - A.O. Smith Cyclone Xi Service Handbook

DIRECT VENTING – ALL MODELS
The air intake provided on the unit contains a mesh screen to prevent large particles from entering the
unit. WHEN THE UNIT IS TO BE SET UP AS A DIRECT VENT, THE BALANCE PLATE AND MESH
SCREEN MUST BE REMOVED BEFORE GLUING PIPE TO THE CONNECTOR. THE INLET VENT
PIPE MAY THEN BE GLUED TO THE AIR INTAKE PROVIDED ON THE UNIT.
Remove the balance plate (BTH400
/500 only) and mesh screen before
gluing intake air pipe to the fitting.
Two 3" or 4" 45° PVC elbows with mesh screens are provided with each unit. Both elbows are
to be used in direct vent applications. The screens are provided to keep vermin and large
debris from entering the intake air and exhaust vent runs.
A.O. Smith – Technical Training Department
CYCLONE Xi COMMERCIAL GAS WATER HEATER
BTH 120 thru 500 SERVICE HANDBOOK
Servicing should only be performed by a Qualified Service Agent
45° PVC Elbow
3" 120-250
4" 300-500
16 Ashland City, Tennessee © 2009
316586-000