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November 22, 2011
7036-135G
Page 11
Mt. Vernon Pellet Insert (AE)
• The fireplace must not be altered, except for the
exceptions listed below. Do not remove the bricks and
mortar from the existing fi replace.
The following modifi cations are permissible:
• Removal of damper or locked in open position
• Removal of smoke shelf or baffl e
• Removal of ember catches
• Removel of fi re grate
• Removal of view screen/curtain
• Removal of doors
• External trim pieces which do not affect the operation
of the fi replace may be removed providing they can be
stored on or within the fi replace for reassembly if the insert
is removed.
• The permanent metal warning label provided must be
attached to the back of the fi replace, with screws or
nails, stating that the fi replace may have been altered to
accommodate the insert, and must be returned to original
condition for use as a conventional fi replace. Figure
11.1
• If the hearth extension is lower than the fi replace opening,
the portion of the insert extending onto the hearth must
be supported.
• Manufacturer designed adjustable support kit can be
ordered from your dealer.
• Final approval of this installation type is contingent upon
the authority having jurisdiction.
I. Altering the Factory-Built Fireplace
WARNING! Risk of Fire!
Follow venting manufacturer’s clearances and instructions
when installing venting system.
NOTICE: In Canada when using a factory-built chim-
ney it must be safety listed, Type UL103 HT (2100
o
F)
[1149
o
C] CLASS “A” or conforming to CAN/ULC-
S629M, STANDARD FOR 650
o
C FACTORY-BUILT
CHIMNEYS.
NOTE: Refer to chimney liner manufacturer for recom-
mendations on supporting the liner. Installation into
fi replaces without a permit will void the listing
250-2061
WARNING
THIS FIREPLACE MAY HAVE BEEN ALTERED
TO ACCOMMODATE AN INSERT. IT MUST BE
RETURNED TO ITS ORIGINAL CONDITION
BEFORE USE AS A SOLID FUEL BURNING
FIREPLACE.
250-2061
Figure 11.1
H. Prefabricated Metal Chimney
The chimney can be new or existing, masonry or prefabricated
and must meet the following minimum requirements:
• Must be minimum 6 inch (152mm) inside diameter of
high temperature chimney listed to UL 103 HT (2100
o
F)
or ULC-S628.
• Must use components required by the manufacturer for
installation.
• Must maintain clearances required by the manufacturer
for installation.
• Refer to manufacturers instructions for installation
•This insert is listed to ASTM E 1509 Standard and is
approved for installation into listed factory-built zero
clearance fi replaces listed to UL 127 conforming to the
following specifi cations and instructions:
•The original factory-built clearance fi replace chimney
cap must be re-installed after installing the approved
chimney liner meeting type UL 103 HT requirements
(2100°F) per UL 1777.
•If the chimney is not listed as meeting HT requirements,
or if the factory built fi replace was tested prior to 1998, a
full height listed chimney liner must be installed from the
appliance fl ue collar to the chimney top.
•The liner must be securely attached to the insert fl ue collar
and the chimney top.
•The air fl ow of the factory-built zero-clearance fi replace
system must not be altered. The fl ue liner top support
attachment must not reduce the air fl ow for the existing
air-cooled chimney system.
•No dilution air is allowed to enter the chimney.
1. Secure the fi replace damper in the open position. If
this cannot be accomplished, it will be necessary to
remove the damper
2. Seal damper area of chimney around chimney
connector with a high temperature sealant or seal
insert against the face of the fi replace.
3. Both methods must be removable and replaceable
for cleaning and re-installation.