15
103536-13 - 2/24
MegaSteam
Installation & Service Manual
Figure 2-7: Flueway Baffle Positioning/Orientation
in Flueways
F. CLOSING / SECURING BURNER SWING DOOR.
1. To close and secure Burner Swing Door:
a. From fully open position, rotate the door to
the closed position.
b. Lift door upward into the build-in cast ramp/
door rest (protruding from the bottom of the
front section casting – see Figure 2-3).
c. Use one hand to apply pressure directly to
the door to hold it in closed position while
re-installing earlier removed door-latching
hardware (3/8-16 in. x 1-3/4 in. tap bolt and
5/16 in. washer). Prior to re-installation,
apply a drop of supplied Anti-seize (pouch
provided in Part Carton) to both tap bolts
for rust protection and to facilitate easy
removal, if burner door is to be open for
inspection and service. ALWAYS INSTALL
RIGHT SIDE LATCHING HARDWARE FIRST,
THEN INSTALL EARLIER REMOVED LEFT
SIDE HINGE HARDWARE (3/8-16 in. X
1-3/4 in. TAP BOLT AND 5/16 in. WASHER)
SECOND. Apply additional pressure while
hand tightening the hardware as far as
possible and then release the pressure.
NOTICE:
When securing burner swing door
make sure door is drawn-in equally on both sides.
d. Use a hand or socket wrench to tighten
door hardware. ALWAYS START WITH
RIGHT SIDE TAP BOLT FIRST. Use an
alternating tightening method from right
side tap bolt to left side tap bolt to tighten
door equally, until sealed, without applying
excessive torque. NEVER TIGHTEN LEFT
SIDE TAP BOLT FIRST, OR, EITHER PIECE
OF HARDWARE 100% WITHOUT USING
THE ALTERNATING METHOD DESCRIBED
ABOVE. See Figure 2-4.
e. Failure to follow the prescribed procedure
could cause thread damage to casting and
/or leak at the door seal. IF LEFT SIDE TAP
BOLT IS TIGHTENED BEFORE RIGHT SIDE
TAP BOLT, RIGHT SIDE OF THE DOOR
CAN NOT BE DRAWN-IN TO PROVIDE AN
AIR-TIGHT SEAL, as shown in Figure 2-6.
Applying excessive torque will only cause
thread damage.
G. JACKET REAR PANEL INSTALLATION.
1. Locate jacket rear panel (has factory attached
3 in. fiberglass insulation) inside Jacket Carton.
See also “Service Parts” Section, “Jacket
Assembly” illustration for part identification.
2. Locate and remove from Hardware Bag rear
panel mounting hardware – (2 pcs) 5/16-18 in.
x 3 in. lg. tap studs, (2 pcs) 5/16-18 in. plated
acorn nuts, (2 pcs) 5/8 in. x 2-9/32 in. round
spacers and (2 pcs) 5/16-18 in. x ½ in. Phillips
pan head machine screws.
3. Locate rear panel two lower attachment bosses
on rear section. See Figure 2-8 “Purpose of
Tappings & Bosses”.
4. Thread both 5/16-18 in. x 3 in. lg. tap studs,
with short threaded end, into lower attachment
bosses on rear section.
5. Install both 5/8 in. x 2-9/32 in. round spacers
over tap studs.
6. Place rear jacket panel over rear section, so
both tap studs clear thru lower panel holes,
rear section cleanout openings clear thru
matching panel cutouts and brass sample port
plug clears panel matching hole.
7. Secure panel bottom to studs with acorn nuts
hand tight.
2
Unit-Pak Boiler Assembly
(continued)
