UltraGlow G33R-1 Zero Clearance Rear Vent Direct Vent Gas Fireplace
19
4)
Assemble the desired lengths of pipe and
elbows. Ensure that all pipes and elbow
connections are in the fully twist-locked
position and sealed.
Note: Apply sealant "Mill-Pac" to inner pipe
and high temperature silicone seal-
ant to outer pipe on every twist-lock
joint.
Diagram 4
5)
Cut a hole in the roof centered on the small
drilled hole placed in the roof in Step 2. The
hole should be of suffi cient size to meet
the minimum requirements for clearance
to combustibles of 1-1/2". Slip the fl ashing
under the shingles (shingles should overlap
half the fl ashing) as per Diagram 3.
Diagram 3: The upper half of the fl ashing is
installed under the roofi ng material and not
nailed down until the chimney is installed. This
allows for small adjustments.
6)
Continue to assemble pipe lengths.
Note: If an offset is necessary in the attic to
avoid obstructions, it is important to
support the vent pipe every 3 feet, to
avoid excessive stress on the elbows,
and possible separation. Wall straps
are available for this purpose.
Galvanized pipe is desirable above the roofl ine
due to its higher corrosion resistance. Continue
to add pipe sections through the fl ashing until
the height of the vent cap meets the minimum
height requirements specifi ed in Diagram 4 or
local codes. Note that for steep roof pitches,
the vertical height must be increased. A poor
draft, or down drafting can result from high
wind conditions near big trees or adjoining
roof lines, in these cases, increasing the
vent height may solve the problem.
7)
Ensure vent is vertical and secure the base
of the fl ashing to the roof with roofi ng rails,
slide storm collar over the pipe section and
seal with a mastic.
8)
Install the vertical termination cap by twist-
locking it.
Note: Any closets or storage spaces, which
the vent passes through must be
enclosed.
Diagram 1
Diagram 2
VERTICAL
TERMINATION
1)
Maintain the 1-1/2" clearances (air
spaces) to combustibles when
passing through ceilings, walls,
roofs, enclosures, attic rafter,
or other nearby combustible
surfaces. Do not pack air spaces
with insulation. Check pages
12-13 for the maximum vertical
rise of the venting system and
the maximum horizontal offset
limitations.
Diagram 4
vent pipe into the vent cap assembly. It is
important that the vent pipe extends into the
vent cap suffi cient distance so as to result
in a minimum pipe overlap of 1-1/4 inches.
Secure the connection between the vent pipe
and the vent cap 3 sheet metal screws.
9)
Install wall thimble in the center of the 10"
square and attach with wood screws (Dia-
gram 4).
2)
Set the gas appliance in
its desired location. Drop a
plumb bob down from the
ceiling to the position of
the appliance fl ue exit, and
mark the location where the
vent will penetrate the ceiling. Drill a small
hole at his point. Next, drop a plumb bob
from the roof to the hole previously drilled
in the ceiling, and mark the spot where the
vent will penetrate the roof.
3)
A Firestop spacer must be installed in the
fl oor or ceiling of every level. To install the
Firestop spacer in a fl at ceiling or wall, cut
a 10 inch square hole. Frame the hole as
shown in Diagram 2 and install the fi re-
stop.
INSTALLATION
Roof Pitch Minimum Vent Height
Feet Meters
fl at to 7/12
2
0.61
over 7/12 to 8/12
2
0.61
over 8/12 to 9/12
2
0.61
over 9/12 to 10/12
2.5
0.76
over 10/12 to 11/12
3.25
0.99
over 11/12 to 12/12
4
1.22
over 12/12 to 14/12
5
1.52
over 14/12 to 16/12
6
1.83
over 16/12 to 18/12
7
2.13
over 18/12 to 20/12
7.5
2.29
over 20/12 to 21/12
8
2.44
