Heatiator NNXT4236IL NNXT3933I Remove the side refractory, Lift top refractory and hold in place

•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

Pull side refractory forward & out

Figure 7.7b Remove Side Refractory

•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 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 7.7d.

-The flue baffle will be turned to install inside the flue for vertical vent runs of 31-60 ft. See Figure 7.7e.

Place flue visor, reinsert screws

Figure 7.7d 12-30 ft Vertical Run

Place flue visor, reinsert screws

Figure 7.7e 31-60 ft Vertical Run

•Reinstall Refractory:

-Replace top refractory.

-Lift top refractory and slide side refractory back into position.

-Replace bottom retainer.

28 Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/12