Heat & Glo Fireplace VRT-BZ-P-AUB - Manual (Page 51)

51 Heat & Glo • VRT-AUB • 2123-980 Rev. J • 2/13
J. Install Metal Roof Flashing
• See minimum vent heights for various pitched roofs
(Figure 10.19) to determine the length of pipe to extend
through the roof.
• Slide the roof flashing over the pipe sections extending
through the roof as shown in Figure 10.20.
Figure 10.19 Minimum Height From Roof To Lowest Discharge
Opening
CAUTION! Risk of Fire! Follow the requirements of the
local standards and codes for minimum height require-
ments from roof line.
Important Notice: Heat shields may not be field constructed.
I. Heat Shield Requirements for Horizontal
Termination
WARNING! Risk of Fire! To prevent overheating and fire,
heat shields must extend through the entire wall thick-
ness.
• DO NOT remove the heat shields attached to the
wall shield firestop and the horizontal termination cap
(shown in Figure 10.18).
• Heat shields must overlap 1-1/2 in. (38 mm) mini-
mum.
There are two sections of the heat shield. One section
is factory-attached to the wall shield firestop. The other
section is factory-attached to the cap. See Figure 10.18.
If the wall thickness does not allow the required 1-1/2 in.
(38 mm) heat shield overlap when installed, an extended
heat shield must be used.
• If the wall thickness is less than 4-3/8 in. (111 mm), the
heat shields on the cap and wall shield firestop must be
trimmed. A minimum 1-1/2 in. (38 mm) overlap MUST
be maintained.
• Use an extended heat shield if the finished wall
thickness is greater than 7-1/4 in. (184 mm).
• The extended heat shield may need to be cut to length
maintaining sufficient length for a 1-1/2 in. (38 mm)
overlap between heat shields.
• Attach the extended heat shield to either of the existing
heat shields using the screws supplied with the extended
heat shield. Refer to vent components diagrams in the
back of this manual.
• Rest the small leg on the extended heat shield on top
of the pipe section to properly space it from the pipe
section.
H (MIN.) - MINIMUM HEIGHT FROM ROOF
TO LOWEST DISCHARGE OPENING
VERTICAL
WALL
TERMINATION
CAP
HORIZONTAL
OVERHANG
12 in
(305 mm)
X
ROOF PITCH
IS X/ 12 in.
(305 mm)
LOWEST
DISCHARGE
OPENING
(510 mm MIN.)
(610 mm MIN.)
24 in MIN.
20 in MIN.
Angle H (Min.) mm
0°-26.6° .......................................................... 500*
26.6°-30.3° .......................................................... 500*
30.3°-33.7° .......................................................... 500*
33.7°-36.9° .......................................................... 610*
36.9°-39.8° .......................................................... 760
39.8°-42.5° .......................................................... 990
42.5°-45.0° ........................................................1 220
45.0°-49.4° ........................................................1 520
49.4°-53.1° ........................................................1 830
53.1°-56.3° ........................................................2 130
56.3°-59.0° ........................................................2 290
59.0°-60.3° ........................................................2 440
*910 mm minimum in snow regions
NOTICE: Failure to properly caulk the roof flashing and
pipe seams may permit entry of water.
• Caulk the gap between the roof flashing and the outside
diameter of the pipe.
• Caulk the perimeter of the flashing where it contacts the
roof surface. See Figure 10.20.
• Caulk the overlap seam of any exposed pipe sections
that are located above the roof line.