Polaris 200 series Instruction Manual page 28

CONCENTRIC VENT INSTALLATION
Note:
installation.
SAFETY CONSIDERATIONS
Figure 26. 2 Inch Concentric Vent
Figure 27. 3 Inch Concentric Vent
Figure 28. Through the Wall Termination
Figure 29. Through the Roof Termination
Tee with
Drain Trap
Trap
See Note 4
NOTES:
1. Support Horizontal Pipe Every Four Feet.
Support Vertical Pipe Every Six Feet.
2. Increase The 12" Minimum Above
Grade To Keep Inlet Opening
Above Anticipated
Snow Levels.
3. Slope All Piping 1/8" Per
Foot Down Toward The
Water Heater.
4. For units with inputs of
150,000 BTU/hr and below,
use 2" or 3" pipe. For units with
inputs of 175,000 BTU/hr and above,
use only 3" pipe.
5. When venting with 2" pipe, a sufficient
length of 3" pipe (6" minimum) must be
inserted into the exhaust and inlet elbow
assembly before transitioning down to
2" pipe with a 3" x 2" reducer.
6. Connect blocked pressure switch hose
to condensate trap.
Figure 30. Concentric Vent Piping Installation
28
3" x 2"
Reducer
See
Note 6
See Note 5
Drain Pan
(Piped to
Adequate
Drain)
3" x 2"
Reducer
See Note 5
Exhaust
Elbow
Assembly