Converting A Class-A Metal Chimney Or Masonry Chimney To A Direct Vent System; Installation Instructions - Vermont Castings Intrepid INDVRCB Homeowner's Installation And Operating Manual

Figure 45
Converting a Masonry Chimney
Top Adapter
Flashing
4" Flex Liner
Retro Connector
Black Direct
Vent Pipe
ST961
20012761
Termination
Cap
Intrepid® Direct Vent - Rear Vent Gas Heater

Installation Instructions

for Converting a Facto-
ry-Built Metal Chimney
1. Remove the existing chim-
ney cap.
2. Measure the distance from
the top end of the chimney
to the bottom of the ceil-
ing support box, add 3" to
this measurement and cut
a section of 4" flex pipe to
that length (the flex should
already be extended to its
nominal length).
3. Connect the end of the flex
pipe section to the underside of the cap adapter you
have selected using three (3) sheet metal screws.
Figure 47
drilling into the metal on
the chimney. Twist-lock
the termination cap (980,
991 or 930) onto the
adapter. (Figs. 47 and
48)
5. Pull the flex pipe down
through the ceiling sup-
port box, until it protrudes
approximately 3" (76
mm). Connect the flex
pipe to the retro connec-
tor by slipping it into the
4C⁄v" (121 mm) diameter
sleeve on the top side of
the connector. Use three (3) sheet metal screws to
assemble these two parts.
Figure 46
Top
Adapter
Sheet
Metal
Screws
Flex
Pipe
ST957
(Fig. 46)
4. Pass the flex
pipe down through
the center of the
chimney system,
and center the
adapter on the top
of the chimney
pipe. Drill four (4)
1/8" diameter holes
through the adapter
and into the chim-
ney top. Insure
that you are in fact,
ST958
Termination
Figure 48
Cap
Sheet
Metal
Screws
Four (4)
1/8" Diameter
ST959
Drill
Holes
25