Specifications

DAKA 521FB Manual Page 17 of 32 January 2009
Rev. 3, June 2013
IX. ASSEMBLY INSTRUCTIONS
INSTALL BLOWER
NOTE: For Add-On furnace installation, do
NOT remove the back-draft damper plate.
For Central Furnace installation, back-draft
damper plate may be removed. (It is located
inside the blower inlet on the right hand side of
back of furnace. Break wire nut to remove).
Install 550-cfm blower over inlet on right hand
side of back of furnace using four (4) No. 12 x
½” screws. See FIG. 14.
CAUTION: Handle blower by the housing unit.
DO NOT REACH INSIDE IMPELLER CAVITY.
INSTALL AIR JACKET PANELS
Furnace is shipped with air jacket panels
installed. If loose or removed during
installation, re-install as follows:
1. Install bottom edge of side panel into
channel on bottom support rail. Working
from the bottom up, press side panel tightly
against firebox. See FIG. 15.
2. Install top air jacket from back to front
making sure air jacket lip goes OVER the
outside of side panels (shoebox style fit).
NOTE: To ease top over sides, insert a
putty knife under top lip and pry lip outward
over side panel. See FIG. 17.
INSTALL SWING PLATE
Open fire door and carefully feel for two (2)
steel hooks above door opening. With bent
edge facing inward, hang swing plate from
hooks. See FIG. 15.
FIG. 14
Blower 
FIG. 15