Specifications

DAKA 521FB Manual Page 15 of 32 January 2009
Rev. 3, June 2013
IX. ASSEMBLY INSTRUCTIONS
INSTALL FIRE DOOR
1. Attach fire door hinge to front of furnace.
See FIG. 9. Position hinge against furnace
with hinge pinhole closest to door opening.
When viewing hinge bracket from top, make
sure that the notched corner is facing away
from door opening.
2. Insert two ¼” hex bolts through hinge
bracket and holes located just to the right of
the door opening. Place washer and nut on
bolt from INSIDE furnace. NOTE: ¼” nut
that is used is a lock-nut and will require
that you use an open-end wrench to hold
the nut while turning the bolt with socket
driver on exterior. Center bolts in slotted
holes to start with. Tighten bolts enough to
hold bracket in place with fire door installed.
3. Install fire door onto hinge bracket. See
FIG. 10. Insert hinge pin from top down.
NOTE: Rotate door handle
counterclockwise to secure door in the
closed position.
4. With fire door installed, check fire door for
proper fit – doorframe should hit center of
rope gasket. If door doesn’t fit properly
(e.g., cast iron door hits door frame rather
than gasket), note location of problem and
then remove fire door. With fire door
removed, adjust hinge bracket location.
The holes in the hinge bracket are slotted
vertically for up and down adjustment. The
holes in the furnace are slotted horizontally
for left to right adjustment. Once the
proper placement has been found,
tighten bolts securely to prevent hinge
from moving.
INSTALL ASH PAN & ASH DOOR
1. Insert thermal gasket between ash door and
ash pan front, making sure that silver foil
side of gasket is facing INWARD toward ash
pan.
2. Securely attach ash door to ash pan using
two (2) ¼” bolts and nuts provided. See
FIG. 11.
NOTE: Ash pan is open-ended scoop design
for easy emptying of ash pan.
FIG. 9
Fire door 
Fire Door
FIG. 10
Ash Pan
FIG. 11