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Intrepid® Direct Vent - Rear Vent Gas Heater
Existing Ceiling
Support Box
Figure 49
ST960
6. Push the flex pipe back up into the ceiling support box,
support box
center the retro connector and attach it to the support
7/07
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. (Fig. 49)
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.
Installation Instructions for Converting a Ma-
sonry Chimney
IMPORTANT: The existing masonry flue opening need to
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 deter-
mined, 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. (Fig. 54)
3. Secure the flashing (705C) to the top of the masonry
chimney using a bead of non-hardening sealant-adhe-
sive. If the flashing is larger than the top of the chimney,
then cut and fold flashing as needed to fit chimney. (Fig.
50)
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. (Fig. 46)
26
Sheet Metal
Screws (3)
ST960
Sheet Metal
Screws (3)
Cut & Bend
Flashing as
Needed to Fit
Chimney
Figure 50
6. Feed the 4" flex liner through the flashing into the chim-
ney. 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 51.
Twist-lock the termination cap (980,991, 930) on to the
cap adapter.
High Wind
Termination Cap
ST962
flashing
7/07
Figure 51
8. Attach the flex to the retro connector. Use three sheet
ST963
metal screws to attach the flex liner to the connector.
cap adapter
(Fig. 52) Mount the retro connector to the masonry wall
7/07
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.
9. Slide the wall thimble cover (940) over the retro connector
and secure the with masonry bolts as shown in Figure
53. If you have a framed wall in front of the masonry,
use wood screws to mount the wall thimble cover to the
framed wall, over the retro connector and the 10" (254
mm) square framed opening as shown in Figure 54. If
needed, add a section of direct vent pipe to the retro
connector in order to extend through the opening in the
wall thimble cover.
ST962
flashing
7/07
Standard
Termination
Cap
Top Adapter
Sheet
Metal
Screws (3)
Flashing
ST963
20306761
Sealant -
Adhesive
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