Converting A Class-A Metal Chimney Or Masonry Chimney To A Direct Vent System - Vermont Castings INDVRBDSB Installation And Operating Instructions Manual

Intrepid® Direct Vent - Rear Vent Gas Heater
Converting a Masonry Chimney
Termination Cap
4" Flex Liner
Retro Connector
Black Direct Vent Pipe
Figure 45
ST961
masonry convert
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3-90-20306761
Top Adapter
Flashing
Vermont Castings • Intrepid DV Owner's Manual_R3 • 12/16
Installation Instructions for Converting a Factory-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
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 46)
Figure 46
4. Pass the flex pipe down through the center of the chimney
ST957
system, and center the adapter on the top of the chimney
flex pipe to cap
pipe. Drill four (4) 1/8" diameter holes through the adapter
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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. (Figs. 47 and 48)
Figure 47
ST958
cap onto adapter
5. Pull the flex pipe down through the ceiling support box, until
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it protrudes approximately 3" (76 mm). Connect the flex
pipe to the retro connector by slipping it into the 43⁄4"(121
mm) diameter sleeve on the top side of the connector. Use
three (3) sheet metal screws to assemble these two parts.
Top Adapter
Sheet Metal
Screws
Flex Pipe
Termination Cap
Sheet Metal
Screws
Drill Four (4) 1/8"
Diameter Holes
Figure 48
ST959
cap to adapter
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