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Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/1228
Lift top refractory
and hold in place
Pull side refractory
forward & out
Figure 7.7b Remove Side Refractory
• Remove the side refractory:
- Gently raise the front of the top refractory.
- Lift the side piece up slightly and then out.
• Remove top refractory:
- Lower towards side removed in previous step.
- Gently twist out.
Lower & twist; pull out
Figure 7.7c Remove Top Refractory
• Remove two screws from fi rebox top.
• Using these screws and the same holes, install the top
vent fl ue baffl e.
- The fl ue baffl e will be turned to install below the level
of the fi rebox top for 12-30 ft vertical runs of vent.
See Figure 7.7d.
- The fl ue baffl e will be turned to install inside the fl ue
for vertical vent runs of 31-60 ft. See Figure 7.7e.
Figure 7.7d 12-30 ft Vertical Run
Figure 7.7e 31-60 ft Vertical Run
Place flue visor,
reinsert screws
Place flue visor,
reinsert screws
• Reinstall Refractory:
- Replace top refractory.
- Lift top refractory and slide side refractory back into
position.
- Replace bottom retainer.