Heatilator CNXT4236IT-C Owner's Manual page 28

E. Vent Diagrams
Top Vent - Horizontal Termination
Note: The CNXT series fi replaces can adapt to SLP series vent
pipe, if desired.
When venting off the top of the unit, use a DVP-2SL adapter and a
minimum 48 inch vertical section of SLP series vent pipe.
A DVP-SLP24 adapter may also be used with a 24 inch vertical
section of SLP series vent pipe.
After the 48 inch vertical section, the venting table rules must be
followed. The fi rst 48 inch vertical section is NOT counted as part
of the vertical components in the table. It is still counted as part of
the overall maximum run. All venting table rules for the vent run
must still be followed.
Example: DVP pipe 3 ft. min. vertical = 11 ft. max. horizontal
SLP pipe 7 ft. min. vertical = 11 ft. max. horizontal
Top Vent - Horizontal Termination
One Elbow
Figure 7.4
28 Heatilator • CNXT4236IT-C, CNXT4842IT-C, CNXT4236IH-C, CNXT4842IH-C • 2208-900 Rev. G • 10/10
Note: For corner installations: A 6 inch (152
mm) section of straight pipe may need to
be attached to the appliance before a 90º
elbow, to allow the vent pipe to clear the top
standoffs.
H
1
WARNING
Fire Risk. Explosion Risk.
Do NOT pack insulation or other combustibles
between ceiling fi restops.
• ALWAYS maintain specifi ed clearances around
venting and fi restop systems.
• Install wall shield and ceiling fi restops as speci-
fi ed.
Failure to keep insulation or other material away
from vent pipe may cause fi re.
WARNING
Fire Risk.
• When using DVP-HRC-SS and DVP-HRC-ZC-
SS termination caps on top vented fi replaces, a
6 inch minimum vertical vent section is required
before installing fi rst elbow.
V Minimum
1
Elbow only
1/2 ft.
1 ft.
1-1/2 ft.
2 ft.
V + H
1 1
H = 25 ft. (7.6 m) Maximum
1
V Minimum
1
Elbow only
1/2 ft. 152 mm
1 ft. 305 mm
V
1 1-1/2 ft. 457 mm
2 ft. 610 mm
2-1/2 ft. 762 mm
3 ft. 914 mm
4 ft.
6 ft.
V + H
1 1
H = 25 ft. (7.6 m) Maximum
1
CNXT4236 Series
H Maximum
1
2 ft. 610 mm
152 mm 6 ft. 1.8 m
305 mm 11 ft. 3.4 m
457 mm 18 ft. 5.5 m
610 mm 25 ft. 7.6 m
= 40 ft. (12.2 m) Maximum
CNXT4842 Series
H Maximum
1
2 ft. 610 mm
2 ft. 610 mm
4 ft. 1.2 m
6 ft. 1.8 m
8 ft. 2.4 m
8 ft. 2.4 m
12 ft. 3.7 m
1.2 m 20 ft. 6.1 m
1.9 m 25 ft. 7.6 m
= 40 ft. (12.2 m) Maximum