30
Heatilator • CNXT Series • 4000-011 Rev N • 11/05
Burn Risk
• Local codes may require installation of a
cap shield to prevent anything or anyone
from touching the hot cap.
WARNING
Fire Risk
Exhaust Fumes Risk
Impaired performance of appliance.
• Overlap pipe slip sections at least
1-1/2 in.
• Use pilot holes for screws.
• Screws must not exceed 1 in. long.
• Pipe may separate if not properly
joined.
WARNING
C. Install the Heat Shield and Horizontal Termination Cap
Heat Shield Requirements for Horizontal Termination
For all horizontally vented appliances, a heat shield MUST
be placed 1 in. above the top of the vent between the wall
shield fi restop and the base of the termination cap.
There are two sections of the heat shield. One section at-
taches to the wall shield fi restop with two screws. The re-
maining section is attached to the cap in the same manner.
If the wall thickness does not allow the required 1-1/2 in.
heat shield overlap, an extended heat shield must be used.
The extended heat shield will need to be cut to the thickness
of the wall and be attached to the wall shield fi restop. The
small leg on the extended heat shield should rest on the top
of the vent (pipe section) to properly space it from the pipe
section (see Figure 8.12).
Note:
Where required, an exterior wall fl ashing is available.
When penetrating a brick wall, a brick extension kit is
available for framing the brick.
INTERIOR
Heat Shield or
Extended
Heat Shield
Wall Shield Firestop
Inner Vent
Outer Vent
Rear Vent
Heat Shield
1-1/2 in. (38 mm) min
overlap
EXTERIOR
SHEATHING
Figure 8.12 Venting through the Wall
Install the Horizontal Termination Cap
Vent termination must not be recessed in the wall. Siding
may be brought to the edge of the cap base.
Flash and seal as appropriate for siding material at outside
edges of cap.
When installing a horizontal termination cap, follow the cap
location guidelines as prescribed by current
ANSI Z223.1
and
CAN/CGA-B149
installation codes.
Fire Risk
Impaired performance of appliance.
• Telescoping fl ue section of termination
cap MUST be used when connecting pipe
section to termination cap.
• Maintain a 1-1/2 in. minimum overlap on
telescoping fl ue section of termination
cap.
WARNING