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26 Heatilator • RBV4236/RBV4842 • 4048-210 Rev K • 02/07
Explosion Risk
• Follow rockwool placement instructions
in this manual.
• Do NOT place rockwool directly over
burner ports.
• Replace rockwool material annually.
Improperly placed rockwool interferes with
proper burner operation.
WARNING
E. Lava Rock, Vermiculite, Rockwool Placement
Placing the Lava Rock and Vermiculite
• Place lava rock on top of the lava rock tray in front of and
under the burner. See Figure 12.4.
• Sprinkle vermiculite evenly over area covered by lava rock.
See Figure 12.5.
• It is not necessary to use entire bag of lava rock or
vermiculite.
Placing the Rockwool
• Place 1/2 in. pieces of rockwool on the burner pan so
that rockwool touches but does not cover the holes in the
burner pan. See Figure 12.6.
• Place rockwool under the front logs as shown in
Figure 12.7.
• It is not necessary to use all the rockwool.
Figure 12.4 Placement of Lava Rock
Figure 12.5 Placement of Vermiculite
Figure 12.6 Placement of Rockwool
Figure 12.7 Placement of Rockwool Under Front Logs