Heatilator • CD4236IFTR, CD4236IFTLR, CD4842IFTR, CD4842IFTLR Installation Manual • 2511-980 Rev. M
• 8/21
24
Top Vent - Vertical Termination
No Elbow
Figure 4.14
Note:
If installing a vertical vent/
termination off the top of the ap
-
pliance, the flue restrictor should
be used.
V
1
V
1
= 60 ft. Max. (18.3 m)
V
1
= 3 ft. Min. (914 mm)
EXHAUST
SHIELD
FLUE
RESTRICTOR
Flue Restrictor Instructions
1. Remove exhaust shield using a 1/4 inch nut driver by
removing the four screws securing it in place. See
Figure 4.15
2. Remove the two flue restrictor components from the
manual bag assembly. See Figure 4.17.
Figure 4.15
Vertical
TOP VENT
REAR VENT
NG
Propane
NG
Propane
4 ft.
1-1
No
Restrictor
No
Restrictor
No
Restrictor
8 ft.
2-2
1-2
1-1
No
Restrictor
15 ft.
3-3
3-2
2-2
1-2
20 ft.
3-4
3-3
3-3
2-3
25 ft.
3-4
3-3
3-3
2-3
30 ft.
4-4
3-4
3-4
3-3
35 ft.
4-4
3-4
3-4
3-3
40 ft.
4-4
4-4
4-4
3-4
50 ft.+
4-4
4-4
4-4
4-4
Figure 4.16
3. Match the amount of vertical you have in the system
with the chart to find the appropriate position to set the
flue restrictor. See Figure 4.16 and Figure 4.17.
4. Center the two flue restrictor pieces on the vent at the
setting selected in step 3 and secure in place by using
two self-tapping screws. See Figure 4.15.
5. Reinstall the exhaust shield.