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DAKA Furnace Model 621
November 2009 Edition
Revision 2: 7-20-12
INSTALLATION INSTRUCTIONS:
I. UNPACKING
Remove all component parts from firebox for assembly; check piece count against
parts list on page 14 of this manual.
NOTE: Remove firebrick from carton while
still within firebox. Do NOT attempt to lift full carton.
)
Parts shortage:
If carton was sealed when purchased, call or write factory
immediately. Provide model number and serial number of
furnace, found on front mounted data plate, along with a
description and quantity of missing parts. Replacements will
be shipped. If carton was purchased unsealed, contact store
for missing parts.
Concealed Damage: If any components have been damaged in transit, advise the
dealer from whom the furnace was purchased of the nature
of the problem, so that a freight claim can be filed.
II. FURNACE ASSEMBLY (Refer to Parts List on page 14)
A. Attach fire door (1) to hinge bracket using hinge pin.
IMPORTANT
: Refer to
Instructions in Hinge Assembly Bolt Bag for proper installation. Note that door
features a double latch operation to limit initial swing of door to 1" on opening.
Continue turning handle clockwise beyond 3 o'clock position to permit full opening
of door. Close door with handle in same position; rotate counterclockwise to lock.
B. Insert thermal gasket (6) between ash door (5) and ash pan (7) front, and
assemble using two 1/4" bolts and nuts provided.
C. Insert Smoke Bypass Damper rod (8) through small hole above fire door, handle
pointing up, and run rod directly back onto smoke baffle plate inside firebox.
Reaching in through fire door opening, screw one large nut onto threaded rod all
the way to the end of the thread. Insert threaded rod end into the hole on the
upright plate on the Smoke Bypass Damper sliding plate, keeping the spring
handle upright. Screw on the 2
nd
large nut and tighten fully.
D. Remove cast-iron grate (10) from firebox. Proceed to install firebricks (15) along
sides and back of firebox, starting at the front, by slipping brick under retaining
angle iron and standing them upright on the grate support rails.
CAUTION: FIREBRICK MUST BE INSTALLED CORRECTLY OR
HEAT DAMAGE MAY OCCUR.
E. Reinstall cast-iron grate in firebox, reinforcing ribs down, resting on side rails.
Insert 3" x 13½" x ¼” steel grate spacer (11) at rear of grate.
F. Install 550-cfm blower (14) on back of furnace using four No. 12 x ½" screws
provided.
G. Furnace is shipped with air jacket already fitted and installed. If it has worked loose
during shipping or unpacking, do the following:
