40
Flex Fuel Owner’s Manual
March 2011
Now close the firebox door and wait unit the
status line changes from “Please ignite” to “Bulk
materials”. This changeover indicates that the
kindling has ignited across its surface and there
is sufficient flame to add wood. The change from
“Please ignite” to “Bulk materials” occurs when the
flue gas temperature exceeds the flue gas start
temperature. The induced draft fan will now regu-
late according to the furnace temperature.
11: Bulk Materials Mode
Now wait 1 to 2 minutes until a clean, full-area fire
bed has formed.
Now you can begin to lay a layer of the medium sized
bulk material in the firebox. It is recommended to
activate smoldering gas extraction while filling the
furnace. (section11.4) Again, you must ensure that this
is parallel to the walls with no cavities and that the
wood will not bind on the walls of the chamber.