DuraVent DuraTech 10-24 Installation - Manual (Page 18)

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the masonry flue opening. If a Damper is
used, make sure nothing interferes with the
damper plate movement. Seal the Anchor
Plate in place with a high temperature sealant.
Secure Anchor Plate with (4) 2” x 1/4” masonry
anchors (Fig. 24).
3a. Damper Plate: The Damper Plate should
swing freely once the Anchor Plate is installed.
When the chain is pulled down, the damper
plate should close (horizontal position). When
the chain is released (no weight on the chain),
the damper should swing open (vertical
position).
3b. Lintel Hook: With the damper plate in
the closed (horizontal) position, determine
and mark the location for the Lintel Hook. The
Lintel Hook should be mounted in a position
so as to provide a small amount of tension in
the spring attached to the chain (Fig. 25). The
MASONRY FIREPLACE
INSTALLATIONS
1. Determine Chimney Size: Use Table 4 to
determine the correct diameter chimney for
your fireplace.
2. Mount Anchor Plate: Chimneys for
masonry fireplaces begin with an Anchor Plate
or Anchor Plate with Damper. Warning: Anchor
Plate with Damper is not allowed in chimneys
serving stoker-fired, liquid or gas burning
appliances. Caution: Do not install Anchor
Plate with Damper on Factory-built fireplaces.
Important: be sure the surface of the masonry
chimney has a level surface on which to attach
the Anchor Plate or Anchor Plate. If the top of
the masonry does not have a level surface,
then you will need to modify the masonry
accordingly. Center the Anchor Plate over
Figure 23
STORM COLLAR SITS DOWN ON COLLAR
OF CHASE TOP FLASHING. TIGHTEN
SO THERE IS AT LEAST 1" CLEARANCE
BETWEEN STORM COLLAR AND
FLASHING.
3/8 INCH AIR SPACE
ESTABLISHED BY SPACERS
3/8 INCH
AIR
SPACE
6 INCH MINIMUM
CLEARANCE
BETWEEN BOTTOM
OF CAP AND CHASE
TOP FLASHING
FRAMED CHASE
ENCLOSURE
CHIMNEY
CAP
STORM
COLLAR
CHASE TOP
FLASHING
CHIMNEY
SECTIONS
CHASE TOP
FLASHING SPACER
3/8 INCH
3/8 INCH