Martin VENT-FREE FIREPLACE SYSTEMS 33ISDG Installation And Operating Instructions Manual page 24

LOG PLACEMENT
5. Place right end of left top log (#5) on bottom center grate pin. Rest the left end of left top log (#5) on the left base log.
See Figure 23.
Left Top Log
(#5)
Pin
Left Base
Log (#3)
Bottom Center Pin
Figure 23 - Installing Left Top Log (#5)
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