Vermont Castings Intrepid INDVRBDSB Installation & Operating Manual page 30

6. Push the flex pipe back up into the ceiling support box,
center the retro connector and attach it to the support box
or decorative sleeve for double wall solid packed pipe,
with the sheet metal screws furnished. The holes in the
retro connector are pre-punched, Figure 3.48.
7. The connection between the appliance and the retro
connector may be completed with sections of black direct
vent pipe, together with an adjustable length.
Existing Ceiling
Support Box
Figure 3.48
Installation Instructions for Converting a Masonry
ST960
Chimney
support box
IMPORTANT: The existing masonry flue opening need to
7/07
have an area of at least 35 square inches (226 square mm)
to insure proper intake/exhaust flow.
1. Before cutting any holes, assemble the desired sections
of black 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" (152 mm) diameter hole in the
masonry. Be careful, if the hole is too large, the retro
connector might not mount properly. If the hole is too
small, then the appliance might starve for intake air. If
there is a frame wall in front of the masonry wall, cut and
frame a 10" (254 mm) clear square opening in the wall
(centered around the 6" (152 mm) masonry opening). If
there is sheet rock only (no studs) in front of the masonry,
the 10" (254 mm) clear opening is still needed, but does
not need to be framed. This allows the retro connector to
mount directly on the masonry and provide clearance to
the combustibles, Figure 3.35.
3. Secure the flashing (705C) 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, then
cut and fold flashing as needed to fit chimney, Figure 3.49.
Cut & Bend Flashing
as Needed to Fit
Chimney
Figure 3.49
3030
Sheet Metal
Screws (3)
Sheet Metal
Screws (3)
Sealant - Adhesive
Vermont Castings • Intrepid DV-IFT Owner's Manual_R20 • 11/21
ST962
4. To determine the length of flex required, measure from 3"
(76 mm) above the top of the flashing down to the level of
the opening. Add to this measurement the distance from
the center of the chimney to out through the wall. Cut a
piece of 4" (102 mm) flex to this length (the flex should
already be extended to its nominal length).
5. Connect the 4" flex liner to the cap adapter (985K) using
three sheet metal screws, Figure 3.47.
6. Feed the 4" flex liner through the flashing into the chimney.
Continue to feed the liner out through the opening in the
masonry wall.
7. Secure the cap adapter to the flashing. Use three (3) sheet
metal screws through the side of the adapter into the flange
on the flashing as shown in Figure 3.50. Twist-lock the
termination cap (980,991, 930) on to the cap adapter.
High Wind
Termination Cap
Top Adapter
Figure 3.50
ST963
8. Attach the flex to the retro connector. Use three sheet
cap adapter
metal screws to attach the flex liner to the connector,
7/07
Figure 3.51. Mount the retro connector to the masonry wall
using masonry bolts. Re-drill larger holes on connector as
needed. Be careful to insure that the connector is centered
in the opening and the mounting holes line up with the
masonry wall.
Standard
Termination Cap
Sheet Metal Screws (3)
Flashing
3-90-30007474