Advertisement
•
A positive flue connection must be made between
the Insert and the first masonry tile or prefabricated
metal chimney section. A positive flue connection
consists of a plate that seals or replaces the fireplace
damper and a section of chimney connector that
passes through the plate into the chimney.
•
The chimney connector must be a minimum equiv-
alent to a 6" (152 mm) diameter opening and must
be 24 gauge or heavier stainless steel.
Chimney Connection systems are available from a variety
of manufacturers. Your Vermont Castings dealer can rec-
ommend a system that will best meet the requirements of
your particular installation.
Sealing Requirements / U.S.
•
The chimney must be sealed off from room air, ei-
ther by a plate at the damper level or by sealing the
fireplace opening.
•
Unused openings to the flue must be sealed with ma-
sonry to the thickness of the chimney wall. Openings
sealed with pie plates or wallpaper are a hazard. In
the event of a chimney fire, flames and smoke may
be forced from the openings.
Canada
In Canada (CAN/CSA-B365-M91, Section 5):
•
This fireplace insert must be installed with a continu-
ous chimney liner of 6" (152 mm) diameterextending
from the fireplace insert to the top of the chimney.
The chimney liner must conform to the Class 3
requirements of CAN/ULC-S635, Standard for Lin-
ing Systems for Existing Masonry or Factory-Built
Chimneys and Vents, or CAN/ULC-S640, Standard
for Lining Systems for New Masonry Chimneys.
•
The opening of the fireplace around the insert must
be sealed to prevent room air passing to the fireplace
cavity.
•
Existing air-circulation chambers in a fireplace with
a steel liner may not be blocked.
•
Provision must be made for removal of the insert to
clean the chimney flue.
•
The existing fireplace damper (if any) should be
locked in the open position.
•
A permanent metal warning label must be affixed to
the back of the fireplace stating the fireplace may
have been altered to accommodate the insert, and
may be unsafe to use as a conventional fireplace. (A
Fireplace Modification Tag is included in the hardware
bag inside the Merrimack Large Insert.)
30004671
Minimum Fireplace Dimensions
The Merrimack Large Insert will fit many fireplaces. To
confirm that it will fit yours, measure the lintel depth, plus
the height, width, and depth of your fireplace and hearth.
Compare them to the measurements in the accompanying
chart. If you choose to install a new hearth over an existing
fireplace hearth, be sure to take its thickness into consid-
eration when measuring both front and back height of the
fireplace and clearances to any existing trims and mantels.
NOTE: The clearance between the Merrimack Large Insert
and the mantel, top trim and side trim cannot be reduced
by installing shields.
Another requirement to consider is the clearance for movable
items such as tables, bookcases, rugs, furnishings, and
your woodbox. All combustible materials of this type should
be a minimum of 48" (1220 mm) from the front surface of
the Merrimack Large Insert. Be sure that family members
are aware of this requirement as well, so they too will keep
objects a safe distance from the stove.
E
B
C
A,I
Fireplace Minimums
A. Width at Face
FP1084
B. Width at Dimension 'C'
winterwarm
C. Depth
1
fireplace minimum dimensions
D. Height at Face
3/01
E. Height at Dimension 'C'
Fireplace Maximums
H. Lintel depth
I. Width
2
J. Height
2
1. The minimum depth must be maintained from the floor of the
fireplace to a height of 21
⁄
" (540 mm)
1
2
2. Though the Merrimack Large Insert will fit into larger fireplaces,
the decorative optional Vermont Castings Group Surround Panels
will not completely cover the fireplace opening if these dimensions
are exceeded. Custom made trim pieces may be used.
Fig. 3 Use these measurements to confirm that the Merrimack
Large Insert will fit into your masonry fireplace.
Merrimack Large Insert
D,J
H
D,J
C
E
FP1084
29
⁄
"
(756 mm)
3
4
25"
(635 mm)
18
⁄
"
(470 mm)
1
2
23
⁄
"
(603 mm)
3
4
23
⁄
"
(603 mm)
3
4
9"
(229 mm)
45"
(1143 mm)
32"
(813 mm)
5
Advertisement
