D.Installing Roof Flashing and Vertical Termination Cap
To install roof flashing see Figure 8.13.
For installation of vertical termination cap see minimum vent heights for various pitched roofs (see Figure 8.13).
HORIZONTAL
OVERHANG
Caulk the gap between the roof flashing and the outside diameter of the pipe. Also caulk the perimeter of flashing that contacts roof surface as shown in Figure 8.15.
To attach the vertical termination cap, slide the inner col- lar of the cap into the inner flue of the pipe section and place the outer collar of the cap over the outer flue of the pipe section.
Secure with three screws into the outer flue. Secure the cap by driving the three
2FT.
MIN.
GAS DIRECT VENT |
TERMINATION CAP |
20 INCHES MIN. | VERTICAL |
LOWEST | WALL |
| |
DISCHARGE |
|
OPENING |
|
X
12
ROOF PITCH
IS X/ 12
H (MIN.) - MINIMUM HEIGHT FROM ROOF TO LOWEST DISCHARGE OPENING
the pilot holes in the outer collar of the cap into the outer flue of the pipe (see Figure 8.14).
TERMINATION CAP
(1 of 3)
Roof Pitch | H (Min.) Ft. |
Flat to 6/12 | 1.0* |
Over 6/12 to 7/12 | 1.25* |
Over 7/12 to 8/12 | 1.5* |
Over 8/12 to 9/12 | 2.0* |
Over 9/12 to 10/12 | 2.5 |
Over 10/12 to 11/12 | 3.25 |
Over 11/12 to 12/12 | 4.0 |
Over 12/12 to 14/12 | 5.0 |
Over 14/12 to 16/12 | 6.0 |
Over 16/12 to 18/12 | 7.0 |
Over 18/12 to 20/12 | 7.5 |
Over 20/12 to 21/12 | 8.0 |
* 3 foot minimum in snow regions
Figure 8.13 Minimum height from roof to lowest discharge opening
WARNING
Fire Risk.
Explosion Risk.
Inspect external vent cap regularly.
•Ensure no debris blocks cap.
•Combustible materials blocking cap may ignite.
•Restricted air flow affects burner operation.
STORM
COLLAR
SCREWS
CAULK 
Figure 8.14
CAULK
Figure 8.15
24 | Heat & Glo • Crescent II • |
