Heatilator CD4236-MOD Installation Manual page 21

Top Vent - Vertical Termination (continued)
3. 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 4.12).
Vertical
4 ft.
8 ft.
15 ft.
20 ft.
25 ft.
30 ft.
35 ft.
40 ft.
Figure 4.12
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 = 4-4
Top vent 40 ft vertical with SLP pipe = 3-3
Two Elbows
Figure 4.13
Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15
TOP VENT
NG LP
No
1-1
Restrictor
2-2 1-2
3-3 3-2
3-3 3-3
3-3 3-3
3-4 3-4
3-4 3-4
3-4 4-4
V
2
4. Center the Flue Restrictor on vent and secure in place
by using two self-tapping screws (see Figure 4.14).
5. Reinstall the Exhaust Shield.
Figure 4.14
V
1
Elbow only
6 in. 152 mm
2 ft. 610 mm
3 ft. 914 mm
4 ft. 1.2 m
V + V
1 2
*No specifi c restrictions on this value EXCEPT
V + V
1 2
H
1
1 2 3 4 5
SETTING
1 2 3 4 5
H Maximum V
1 2
2 ft. 610 mm *
6 ft. 1.8 m *
11 ft. 3.4 m *
16 ft. 4.9 m *
20 ft. 6.1 m *
+ H = 50 ft. (15.2 m) Maximum
1
+ H cannot exceed 50 ft (15.2 m)
1
V
1
V + V Min.
1 2
* *
* *
* *
* *
* *
21