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Heatilator • NNXT33-IFT, NNXT33L-IFT, NNXT36-IFT, NNXT36L-IFT Installation Manual • 2628-980 Rev. C • 8/20
42
Figure 7.15 Venting Through the Wall
INTERIOR
HEAT SHIELD OR
EXTENDED
HEAT SHIELD
WALL SHIELD
FIRESTOP
HEAT SHIELD
1-1/2 IN. (38 MM) MIN.
OVERLAP
SHEATHING
VENT DEPTH FROM BACK OF APPLIANCE TO
OUTSIDE SURFACE OF EXTERIOR WALL
(SEE CHART BELOW)
SLIP SECTION
CAN BE EXTENDED
INNER VENT
OUTER VENT
EXTERIOR
Note:
When using termination caps with factory-supplied
heat shield attached, no additional wall shield firestop is
required on the exterior side of a combustible wall.
Install Horizontal Termination Cap (DVP and
SLP Pipe)
WARNING! Risk of Fire!
The telescoping flue section of
the termination cap MUST be used when connecting vent.
• 1-1/2 (38 mm) minimum overlap of flue telescoping
section is required.
Failure to maintain overlap could cause overheating and
fire.
• 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
and refer to Section 4 of this manual.
CAUTION!
Risk of Burns!
Local codes may require in
-
stallation of a cap shield to prevent anything or anyone
from touching the hot cap.
NOTICE:
For certain exposures which require superior
resistance to wind-driven rain penetration, a flashing kit
and HRC caps are available. When penetrating a brick
wall, a brick extension kit is available for framing the brick.
Cap Specification Chart (depth without using additional pipe sections)
NNXT Series
DVP-TRAPK1
Top Vent Depth
DVP-TRAP1
Rear Vent Depth
DVP-TRAPK2
Top Vent Depth
DVP-TRAP2
Rear Vent Depth
SLP-TRAP1
Top Vent Depth
SLP-TRAP2
Top Vent Depth
4 1/2 to 6 3/8 in.
3 to 4 7/8 in.
6 7/8 to 10 7/8 in. 5 3/8 to 9 3/8 in.
2 to 3 7/8 in.
4 3/8 to 8 3/8
in.
DVP-HPC1
Top Vent Depth
DVP-HPC1
Rear Vent Depth
DVP-HPC2
Top Vent Depth
DVP-HPC2
Rear Vent Depth
4 1/2 to 6 5/8 in.
3 to 5 1/8 in.
6 5/8 to 10 3/4 in. 5 1/8 to 9 1/4 in.
DVP-TRAP1 can adjust 1 1/2 in. (3 1/8 to 4 5/8)
DVP-TRAP2 can adjust 4 in. (5 3/8 to 9 3/8)
SLP-TRAP1 can adjust 1 5/8 in. (3 1/8 to 4 3/4)
SLP-TRAP2 can adjust 4 in. (5 1/4 to 9 1/4))
DVP-HPC1 can adjust 2 1/8 in. (4 1/4 to 6 3/8)
DVP-HPC2 can adjust 4 1/8 in. (6 3/8 to 10 1/2)