American International PR 130-34 2NV or 2PV Manual Do Utilizador

9

When 3 inch pipe is used between the water heater and the 
outside wall, reduce it to 2 inch pipe before penetrating the 
wall. A maximum of 18 inches of 2 inch pipe may be used 
between the 3 inch transition and the inside of the wall (see 
figure 7A).

The standard horizontal air inlet termination is a 2 inch 
pipe which terminates at the exterior wall and utilizes a 
coupling to prevent the pipe from being pushed back into the 
structure. The standard horizontal exhaust outlet termination 
is a 2 inch pipe which terminates 12 inches from the outside 
wall. The air inlet must be located with respect to the exhaust 
outlet as shown in figure 7A (bottom).

Install a drain tee assembly and trap in the inlet vent as 
close to the water heater as possible. This is to drain any 
water that may be in the combustion air pipe and prevent 
it from entering the blower.  Connect the trap drain line to a 
suitable drain or downstream of the condensate trap of the 
water heater.

Note: See “Venting Additional Polaris® Units” on Page 10 
for correct terminations if installing more than one Polaris® 
gas water heater.  

The combustion air and exhaust terminations may be raised 
up to 24 inches above the wall penetrations if required for 
anticipated snow levels (see figure 8A).  The two elbows 
shown in figure 8A are considered part of the termination 
and should not be included when determining the maximum 
allowable vent pipe length.

Note: See “Venting Additional Polaris® Units” on Page 10 
for correct terminations if installing more than one Polaris® 
gas water heater.