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139987-C GI 645 DV and DV MV 6/21
6.2 Factory-built Fireplace
BEFORE STARTING THIS INSTALLATION, MAKE
SURE THAT A GAS LINE CAN BE INSTALLED OR IS
INSTALLED TO THE FIREBOX. THIS SHOULD ONLY
BE DONE BY A QUALIFIED OR LICENSED PLUMBER
OR GAS FITTER.
A factory-built fireplace will require modification prior to
installation of the insert.
Modification
1. Remove any factory-built glass doors, screen rails, screen
mesh, fuel grates and other components attached to the
firebox. Smoke shelves, shields, fuel grates and baffles may
be removed if attached by mechanical fasteners. These
should be kept for potential future re-installation.
Do not cut out any sheet metal parts of the fireplace into
which the insert will be installed.
If the factory-built fireplace has no gas access inlet(s)
provided, an access hole of 1 1/2" or less may be drilled
through the lower sides or bottom of the firebox in a proper
workmanship-like manner. This access hole must be sealed
with noncombustible insulation after the gas supply has
been installed.
2. Remove the damper assembly. This includes the damper
blade, handle and any linkage. Two 3" liners must be able to
pass through the damper area.
3. Remove any fire screen or door assembly. This is usually
accomplished with removal of a support rod on the inside of
the fireplace frame.
4. Remove the metal ash lip, if appropriate, to allow the
insert to sit flat within the fireplace. Be sure to reinstall any
screws removed.
5. Attach the fireplace conversion notice to the back of the
factory-built fireplace.
If the intake flex does not extend the full length of
the chimney and connect to the unit and the termination
cap - A METAL BLOCK OFF PLATE MUST BE
CONSTRUCTED AND INSTALLED ABOVE THE UNIT
BELOW THE END OF THE INTAKE DUCT (normally at
the damper area). See fig. 6.2.
To avoid cross venting the insert, label the duct to be
used for the exhaust conduit at both the top and bottom
ends. This ensures that the exhaust duct will be attached
to the correct collar on the insert and on the chimney
termination kit.
CANADA NOTE: Both Intake and Exhaust ducts
must extend the full length of the chimney and be
connected to both the unit and the termination kit.
12
IMPORTANT:
VENT NOTICE:
IMPORTANT NOTICE:
INSTALLATION OF A HIGH-WIND TERMINATION CAP
IS RECOMMENDED FOR ALL APPLIANCES TO HELP
INCREASE PERFORMANCE.
We Recommend:
• M&G Duravent - Use Wind Screen #46DVA-VWG.
We do not recommend use of "prairie-style" wind caps.
Exhaust
Gas
Listed Direct Vent
Standard or High-wind Termi-
nation Cap
DO NOT BLOCK OFF
DOUBLE OR TRIPLE
WALL CHIMNEY AIR
FLOW.
Listed Flexible
Gas Liners
Max. Height 35 ft.
Min. Height 10 ft.
Clearance to combustible
materials must be
maintained in accordance
with the fireplace
manufacturer's
listing.
A metal block-off
plate is required to
seal flue from the
living area if the Air
Intake pipe does not
connect directly to a
termination cap.
Hearth protection
must be maintained
in accordance
with the fireplace
manufacturer's
listing.
Figure 6.2. Venting through prefabricated fireplace chimney.
IMPORTANT NOTICE:
THE USE OF AN EXISTING CHIMNEY AS AN AIR
INTAKE IS NOT COVERED UNDER THE ANSI
Z21.88-1999 / CSA 2.33-M04 TEST METHODS AND
RESULTING ITS/WHI PRODUCT CERTIFICATION.
THE CODE AUTHORITY HAVING JURISDICTION
MUST BE CONSULTED PRIOR TO PROCEEDING
WITH THIS INSTALLATION METHOD.
Intake Air
Storm Collar
Minimum UL
127 Listed Solid
Fuel
Chimney within
wood framed
chase.
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