Catalyst Replacement - Appalachian Stove & Fabricators Trailmaster 4N1-XL Installation And Operation Procedures

4. CATALYST REPLACEMENT

To replace damaged or non-functioning catalytics follow these steps:
A) Loosen the damper tab bolts with 9/16" socket to allow the damper tab to slide back. Lower the cast housing as
shown.
B) Remove the mixing plate, sealing plate and catalyst. Clean the area where the catalyst sits to remove old gasketing.
Inside the stove, check the area where the damper system was located and clean away old gasketing, if necessary.
C) Install the new catalysts. Uncanned catalysts (catalysts not in metal housing) should be wrapped with 1/16"
gasketing before installing. Locate the catalysts ½" from the front of the damper housing. Re-install the sealing.
D) New gasketing should be installed to allow for a seal between the damper housing and the firebox top. This may
be done by putting a layer of gasketing around the top where the housing is located. In both cases, the use of an
adhesive to hold the gasketing in place will make the installation easier.
E) Remount the cast housing in the back of the stove. Tighten damper tab bolts. Make sure the damper slides easily.
Use furnace cement to seal gaps between the sealing plate and the catalysts, the rod guide and the top of the firebox.
16