Heat & Glo • Paloma • 7031-220 Rev. P • 10/08
22
CUT AND BEND FLASHING
AS NEEDED TO FIT CHIMNEY
SEALANT-ADHESIVE
10 in. x 10 in.
(254 mm x 254 mm)
FRAMED OPENING IN WALL
STUDWALL
MASONRY
CHIMNEY
RETRO
CONNECTOR
FOUR MASONRY BOLTS
(NOT INCLUDED)
WALL THIMBLE COVER
Figure 5.25
Figure 5.26
1. Before cutting any holes, assemble the desired
sections of direct vent pipe to determine the center of
the masonry penetration.
2. Once the center point of the penetration has been
determined, cut a 6 in. (152 mm) diameter hole
in the masonry. If the hole is too large, the retro
connector might not mount properly; if the hole is
too small, the appliance might starve for intake air. If
there is a frame wall in front of the masonry wall, cut
and frame a 10 in. (254 mm) square opening in the
wall (centered around the 6 in. (152 mm) masonry
opening). If there is sheet rock only (no studs) in
front of the masonry the 10 in. (254 mm) opening is
still needed, but does not need to be framed. If the
hole is framed a round support box/wall thimble is
required. This allows the retro connector to mount
directly on the masonry and provide the correct
clearances to combustibles (Figure 5.25).
4. To determine the length of flex needed, measure from
3 in. (76 mm) above the top of the flashing down to the
level of the opening. Add the distance from the center
of the chimney out through the wall. Cut a piece of 4
in. (102 mm) flex to this length (extended to its nominal
length). Be sure to leave 2-3 in. (51-76 mm) of flex
above the existing chimney to allow for connection to
the termination kit.
5. Connect the flex liner to the top adapter using three
sheet metal screws (Figure 5.21 page 20).
6. Feed the flex liner through the flashing into the
chimney. Carefully feed the flex liner down the chimney
to the bottom and out the opening in the masonry wall,
forming an angle to line up the flex liner with the vent
opening on the appliance.
3. Secure the flashing to the top of the masonry chimney
using a bead of non-hardening sealant-adhesive. If the
flashing is larger than the top of the chimney, cut and
fold flashing as needed to fit chimney (Figure 5.26).
7. If additional lengths of flex liner are needed to span
the chimney height, use a flex coupler to connect the
pieces of flex liner together. Connect the flex to the
coupler by using four sheet metal screws for each side
(Figure 5.27, on the next page).
NOTE: For hearth applications refer to page 20, Figure 5.24
for the use of the 923GCL co-axial to co-linear appliance con-
nector.
Ensure that existing chimney is functionally sound and
clean.
• Have inspection done by qualifi ed chimney sweep or
professional installer BEFORE converting to direct vent
appliance.
CAUTION
Fire Risk.
Explosion Risk.
•
Do not let the fl ex liner sag below the level
at which it will connect to the appliance
or connector. This could allow hot gas to
become trapped and potentially become a
fi re hazard. The fl ex liner path should always
be sloped up toward the termination cap.
WARNING
