Hearth and Home Technologies Direct Vent Gas Appliance CD4842LR - Manual (Page 46)

Heatilator • Caliber CD Series • 4040-263 Rev N • 11/08 46
G. Install Metal Roof Flashing
Note: Skip to Section 10.I. if using the RF4-8.
• See minimum vent heights for various pitched roofs
(Figure 10.14) to determine the length of pipe to extend
through the roof.
• Slide the roof fl ashing over the pipe sections extending
through the roof as shown in Figure 10.15.
Horizontal
overhang
12
X
20 in.
(508 mm)
Lowest
Discharge
Opening
Termination
Cap
Roof Pitch
is X / 12
Vertical
wall
H (min.) - Minimum height
from roof to lowest
discharge opening.
24 in. min.
(610 mm)
Roof Pitch H (Min.) Ft. Roof Pitch H (Min.) Ft.
Flat to 6/12 1.0* Over 11/12 to 12/12 4.0
Over 6/12 to 7/12 1.25* Over 12/12 to 14/12 5.0
Over 7/12 to 8/12 1.5* Over 14/12 to 16/12 6.0
Over 8/12 to 9/12 2.0* Over 16/12 to 18/12 7.0
Over 9/12 to 10/12 2.5 Over 18/12 to 20/12 7.5
Over 10/12 to 11/12 3.25 Over 20/12 to 21/12 8.0
* 3 ft. minimum in snow regions
Storm Collar
Roof
Flashing
Figure 10.14 Minimum Height From Roof To Lowest Discharge
Opening
NOTICE: Failure to properly caulk the roof fl ashing could
cause water entry.
• Caulk the gap between the roof fl ashing and the outside
diameter of the pipe.
• Caulk the perimeter of the fl ashing where it contacts the
roof surface. See Figure 10.15.
Caulk
Pipe
Flashing
H. Assemble and Install Storm Collar
CAUTION! Risk of Cuts, Abrasions or Flying Debris.
Wear protective gloves and safety glasses during installa-
tion. Sheet metal edges are sharp.
• Connect both halves of the storm collar with two screws
(see Figure 10.16).
• Wrap the storm collar around the exposed pipe section
closest to the roof and align brackets. Insert a bolt
(provided) through the brackets and tighten the nut to
complete the storm collar assembly. Make sure the collar
is tight against the pipe section.
• Slide the assembled storm collar down the pipe section
until it rests on the roof fl ashing (see Figure 10.17).
• Caulk around the top of the storm collar (see Figure
10.23).
Figure 10.15
Figure 10.16 Assembling the Storm Collar
Figure 10.17 Assembling the Storm Collar Around the Pipe