Burnham MEGASTEAM MST288 - Manual (Page 12)

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Figure 5A: Partial Front View - Burner Swing Door Mounted to Boiler - Fully Closed and Secured
1. To open/remove Burner Swing Door (mounted on
Cast Iron Section/Burner Swing Door/Smoke Box
Assembly) and door mounting bracket for front
jacket panel installation:
a. Loosen but not remove door left side latching
hardware (3/8”-16 x 1-3/4” tap bolt).
b. Loosen and remove door right side latching
hardware (3/8”-16 x 1-3/4” tap bolt and 5/16”
washer) and set aside.
c. Remove door left side latching hardware (3/8”-
16 x 1-3/4” tap bolt and 5/16” washer) and set
aside.
d. Lift the door off mounting bracket and set aside.
e. Remove two 5/16”-18 – ¾” hex head cap screws
securing door mounting bracket to front section
and set aside.
f. Remove door mounting bracket and set aside.
g. Note/mark cap screw bosses on front section
left side; locate/mark similar two bosses directly
opposite on front section right side. These four
front section bosses are front jacket panel and
door mounting bracket attachment points.
See also Figure 7 “Purpose of Tappings & Bosses”.
2. Open Jacket Carton and locate jacket front panel
(has factory attached 1” fiberglass insulation). See
also “Repair Parts” Section, “Jacket Assembly”
illustration for part identification.
3. Open Part Carton, locate Hardware Bag, remove
two 5/16”-18 x ½” Phillips pan head machine
screws.
4. Place front jacket panel over front section
attachment bosses and align jacket holes with front
section boss holes.
5. Firstly, install two 5/16”-18 x ½” Phillips pan head
machine screws hand tight to secure front jacket
panel right side to casting
6. Secondly, insert 5/16”-18 – ¾” hex head cap
screw thru door mounting bracket upper hole
and upper hole on left side of front jacket panel
simultaneously, and, fasten the bracket and panel to
casting hand tight.
7. Thirdly, insert 5/16”-18 – ¾” hex head cap
screw thru door mounting bracket lower hole
and lower hole on left side of front jacket panel
simultaneously, and, fasten the bracket and panel to
casting hand tight.
8. Finally, tighten both sets of hardware to secure the
bracket and front jacket panel.
9. Inspect fiberglass rope located on the swing door.
The rope must be evenly distributed around the
perimeter of the door groove and cannot bunch or
overhang. Repair or replace, if the rope is damaged,
or, there is a gap between the rope ends.
10. Inspect burner swing door insulation for damage and
proper type.
By design, for all models, cast bars on front section
between the combustion chamber, and, between the
left and right side 2nd and 3rd pass flueways should
make an impression in door insulation to seal the
chambers.