Heatilator CNXT4236IT-C Owner's Manual page 33

Top Vent - Vertical Termination (continued)
6. Match the amount of vertical you have in the system
with the chart to fi nd the appropriate position to set the
Flue Restrictor (see Figure 7.13).
TOP VENT
Vertical
NG
4 ft. 1-1
Restrictor
8 ft. 2-2
15 ft. 3-3
20 ft. 3-3
25 ft. 3-3
30 ft. 3-4
35 ft. 3-4
40 ft. 3-4
50 ft.+ 3-4
Figure 7.13
Note: If the DVP-2SL or DVP-SLP24 adapter is used with
SLP pipe, you MUST subtract one number from the table
above.
Example: Top vent 40 ft vertical with DVP pipe = 3-4
Top vent 40 ft vertical with SLP pipe = 2-3
Two Elbows
Figure 7.15
Heatilator • CNXT4236IT-C, CNXT4842IT-C, CNXT4236IH-C, CNXT4842IH-C • 2208-900 Rev. M • 7/14
REAR VENT
LP NG LP
No No No
Restrictor Restrictor
No
1-2 1-1
Restrictor
3-2 2-2 1-2
3-3 3-3 2-3
3-3 3-3 2-3
3-3 3-3 3-3
3-4 3-4 3-3
3-4 3-4 3-4
3-4 3-4 3-4
V
2
H
1
7. Center the Flue Restrictor on vent and secure in place
by using two self-tapping screws (see Figure 7.10).
8. Reinstall the Exhaust Shield. See Figure 7.11 and
7.14.
Figure 7.14
V
1
Elbow only
6 in. 152 mm
2 ft. 610 mm
3 ft. 914 mm
4 ft. 1.2 m
V + V + H
1 2 1
*No specifi c restrictions on this value EXCEPT
V + V + H cannot exceed 60 ft (18.3 m)
1 2 1
V
1
1 2 3 4 5
SETTING
1 2 3 4 5
H Maximum V V + V
1 2 1
2 ft. 610 mm * *
6 ft. 1.8 m * *
11 ft. 3.4 m * *
16 ft. 4.9 m * *
20 ft. 6.1 m * *
= 60 ft. (18.3 m) Maximum
Min.
2
*
*
*
*
*
33