A.O. Smith BTH 120 Series, Руководство по обслуживанию

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Servicing should only be performed by a Qualified Service Technician
DIRECT VENTING – ALL MODELS
The air intake provided on the unit contains an air intake 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 AIR INTAKE
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 air intake screen before
gluing intake air pipe to the fitting.
45° PVC Elbow
3" 120-250
4" 300-500
Two 3" or 4" 45° PVC elbows with air intake 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.
AIR INTAKE SCREEN