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•
Remove the side refractory:
-
Gently raise the front of the top refractory.
-
Lift the side piece up slightly and then out.
Lift top refractory
and hold in place
Figure 4.18 Remove Side Refractory
•
Remove top refractory:
-
Lower towards side removed in previous step.
-
Gently twist out.
Lower & twist; pull out
Figure 4.19 Remove Top Refractory
24
Heatilator • NNXT33-IFT, NNXT33L-IFT, NNXT36-IFT, NNXT36L-IFT Installation Manual • 2628-980 Rev. C • 8/20
Pull side refractory
forward & out
•
Remove two screws from firebox top.
•
Using these screws and the same holes, install the top
vent flue baffle.
-
The flue baffle will be turned to install below the level
of the firebox top for 12-30 ft. vertical runs of vent.
See Figure 4.20.
-
The flue baffle will be turned to install inside the flue
for vertical vent runs of 31-60 ft. See Figure 4.21.
Place flue baffle,
reinsert screws
Figure 4.20 12-30 Foot Vertical Run
Place flue baffle,
reinsert screws
Figure 4.21 31-60 Foot Vertical Run
•
Reinstall Refractory:
-
Replace top refractory.
-
Lift top refractory and slide side refractory back into
position.
-
Replace bottom retainer.
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