Converting A Class-A Metal Chimney Or Masonry Chimney To A Direct Vent System - 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
tory-Built Metal Chimney
1. Remove the existing chimney
cap.
2. Measure the distance from the
top end of the chimney to the
bottom of the ceiling support
box, add 3" to this measure-
ment 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. (Fig. 46)
4. Pass the flex pipe down through the center of the chimney
Figure 47
(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 connector 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.
6. Push the flex pipe back up
into the ceiling support box,
Figure 46
Top
Adapter
Sheet
Metal
Screws
Flex
Pipe
ST957
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 chimney
top. Insure that you
are in fact, drilling
into the metal on the
chimney. Twist-lock
the termination cap
(980, 991 or 930)
onto the adapter.
ST958
Termination
Figure 48
Cap
Sheet
Metal
Screws
Four (4)
1/8" Diameter
ST959
Drill
Holes
25