American International PG10*50-199-3NV or 3PV Manual Do Utilizador

10

When 3 inch pipe is used between the water heater and the 
roof, reduce it to 2 inch pipe before penetrating the roof. A 
maximum of 18 inches of 2 inch pipe may be used between 
the 3 inch transition and the inside of the roof.

The vertical inlet air termination requires a return bend 
or two short or long sweep radius 90 elbows to keep the 
inlet downward and prevent entry of rain. These elbows 
are considered part of the termination and should not be 
included when calculating the maximum allowable vent 
pipe length. Refer to figure 9A for the proper location of the 
air inlet with respect to the exhaust outlet termination. The 
vertical exhaust outlet termination is a 2 inch pipe which 
terminates at least 12 inches above the inlet air termination.

The air inlet and exhaust outlet terminations must be at 
least 12 inches above the roof line or anticipated snow 
levels.  See figure 9A below.

Note: See “Venting Additional Polaris® Units” below if 
installing more than one Polaris® gas water heater.  
 

When using two (2) Polaris® units, install vent terminations 
using either Method A or Method B below:

When using three or more Polaris® units, install vent 
terminations per Method C or Method D: