Heatilator • NNXT4236IF, NNXT4236ILF, NNXT3633IF, NNXT3633ILF Installation Manual • 4055-980 Rev. D • 9/15
16
Figure 4.10
1. Top Vent - Horizontal Termination
- (continued)
Three Elbows
H
1
V
1
V
2
H
2
Installed
Vertically
V
1
min.
V
1
+ V
2
max.
H
1
+H
2
max.
ft
m
ft
m
ft
m
DVP
1
0.30
24
7.32
17
5.18
SLP
1
0.30
22
6.71
17
5.18
2. Top Vent - Vertical Termination
No Elbow
Figure 4.11
12 ft (3.66 m) min.
60 ft (18.29 m) max.
Install Top Vent Flue Visor - No Elbow Con
fi
gura-
tions
• Remove the refractory retainer from one of the side
refractories.
Remove lower
refractory retainer
Figure 4.11a Remove Refractory Retainer
