14
139760_A GF 500 DV Oct. 2017
Figure 19. Vent System through a masonry chimney
using the Simpson Dura-Vent Chimney Conversion Kits.
Drawing is for illustrative purposes only - DO NOT VENT
TWO APPLIANCES INTO A SINGLE CHIMNEY.
The GF 500 DV is approved for use with components
of M&G DuraVent (Direct Vent Pro) coaxial Chimney Kit
46DVA-KMC and 46DVA-KCT in a masonry chimney or
Chimney Kits 46DVA-KCA, 46DVA-KCB, and 46DVA-KCC for
prefabricated solid fuel listed chimneys.
These installation requirements must be followed:
Use the guidelines for vertical termination shown on
page 12.
In masonry chimney, a fireclay liner or listed steel liner,
must be present the entire length of the chimney.
Chimney height should not exceed 35 ft. (10.66 m).
The liner must have an inside dimension of 6” round or
greater.
Prefabricated chimneys must be UL 103 or ULC S-629
listed and have a minimum INSIDE diameter of 6 inch-
es, (150 mm). Prefabricated chimneys must be listed for
the specific M&G Dura-Vent Chimney Conversion Kits
noted above.
Masonry or Prefabricated Chimney
Conversion
IMPORTANT NOTICE
IN THE U.S.,THE USE OF AN EXISTING CHIMNEY AS
AN AIR INTAKE IS NOT COVERED UNDER THE ANSI
Z21.88-2014 / CSA 2.33-2014 TEST METHODS AND
RESULTING ITS/WHI PRODUCT CERTIFICATION. THE
CODE AUTHORITY HAVING JURISDICTION MUST
BE CONSULTED PRIOR TO PROCEEDING WITH THIS
INSTALLATION METHOD.
THIS INSTALLATION IS NOT APPROVED IN CANADA.
Vertical Termination Cap
Cap Adaptor
Support/Wall
Thimble Cover
Exhaust
Gas
Intake Air
Use M&G
Dura-Vent
ProSeries pipe
from stove to
thimble
4” Flex Pipe
not included
in kit
Support/Wall
Thimble Cover
Horizontal Termination
Any horizontal termination must fall within the shaded
portion of the vent window matrix shown in fig. 15.
Horizontal termination requirements:
1) If no vertical run, the minimum horizontal run is 6 in.
into a 36” Snorkel.
2) If no vertical run, the maximum horizontal run is 24 in.
into a 36” Snorkel.
3) Maximum vertical run is 35 ft.
4) With any vertical run, the maximum horizontal run is 27 ft.
Up to four 45° or two 90° elbows may be used in
addition to the starter elbow.
The maximum allowable
horizontal run must be reduced by 5 feet (1.52 m) for
each
additional elbow, whether 45° or 90°.
The horizontal termination cap must maintain a 3"
clearance to any overhead combustible projections
2 1/2" or less. It must also maintain 12" clearance from
projections exceeding 2 1/2". See fig. 25.
Wall Cut-out Opening: A minimum 10" X 10" (250 mm
x 250 mm) square hole is required for proper pipe
clearances through a combustible wall.
DO NOT FILL AIR SPACE WITH ANY TYPE OF INSULATION.
Any horizontal run of vent must be level or have a
1/4 in. rise for every foot of run toward the termination
cap. NEVER ALLOW THE VENTING TO RUN DOWNWARD
FROM STOVE TO TERMINATION; A DOWNWARD VENT
RUN TRAPS HEAT AND CREATES A FIRE HAZARD.
Install a Vinyl Siding Standoff (M&G DirectVent Pro
BVS) between the vent termination and an exterior
wall covered by vinyl siding material to prevent
potential heat damage to the siding.
A direct vent horizontal terminal may not be recessed
into a wall or siding. Install a Vinyl Siding Standoff
on any irregular surfaced siding, (ie: ship lap, shake
shingle) so that the termination cap is not imbedded
into the siding.
