45
March 2011
Flex Fuel Owner’s Manual
Note: Always ensure that the insert corresponding to the furnace operating mode is fitted and the
pellet slide and flap (if installed, section 13.3) are in the correct position for the selected mode. If the
furnace operating mode is changed from “Pellets auto control” to “Bulk materials” or “Bulk materials
auto control”, the pellet feeder will empty (takes approximately 250 seconds). Open the swivel flap
during the emptying process and only close it again once the feeder is empty. Ensure that the divert-
ing valve has been properly set. (Section 5.4)
12.1 General Information
This mode is only available if an igniter has been installed. If you do not have this option and would like
it, please contact your WoodMaster Flex fuel Dealer for information.
In this operating mode the bulk
material is automatically ignited by the igniter. This ignition procedure begins when a heating demand
is present, a time release (section 12.4) has been set and the furnace operating mode has been set to
"Bulk materials auto control". The start screen always indicates the furnace operating mode which is
currently set. If this is not set to “Bulk materials auto control”, change the furnace operating mode as
described in section 10.
12.2 Pre-Firing Checks
Check the Firebox
Check that there are no foreign objects in the firebox and place the insert for Bulk Materials Mode is in
the firebox. Ensure also that ash residues are removed from the firebox. In particular the insert should be
free from residues so that a down-draft can be guaranteed. The ash residues can be guided into the
ash chamber through the insert using the fire irons.
(Section 15)
Check the Primary Air Feed
To guarantee that your Flex fuel receives the oxygen feed necessary for ensuring clean burning, the two
air deflectors which are located on the right and left furnace side walls in the firebox must be checked or
cleaned with the fire irons. (Section 15)
Check the Ash Chamber
Check that there are no foreign objects inside the ash chamber and that the refractory is not damaged.
Any accessories such as ash trays, furnace utensils, etc. should not be in the ash chamber or firebox
during operation. Remove ash build up if needed. Close the ash door and ensure that it seals properly.
(Section 15)
Check the Pellet Slide
If the optional Pellet Arm is installed you must also verify that the pellet slide is removed and the flap is
closed. (Section 13.3) If your furnace does not have this installed you will not see this feature.
12: Bulk Materials Auto Mode
