14
103536-13 - 2/24
MegaSteam
Installation & Service Manual
11. Upon inspection completion, lift door and place
integral cast hinge pins into door mounting
bracket slotted holes. Do not close and secure
door at this time, proceed to installing stainless
steel flueway baffles.
12. Locate/remove four #8 x ½ in. shoulder sheet
metal screws from Hardware Bag, then, install
them into front panel flange holes.
E. FLUEWAY BAFFLE INSTALLATION.
Flueway baffles are enclosed into Part Carton.
Baffle requirements differ by boiler model, see
Table 2-5.
NOTE
:
Read caution statement before
proceeding.
Figure 2-6: Top View - Burner Swing Door Fully
Closed but Not Properly Secured or Sealed
CAUTION
These baffles will generate higher efficiencies
and lower stack temperatures. Under certain
conditions, a lower gross stack temperature
entering the chimney has the potential to
be cooled below the dew point and create
condensate on interior surfaces. Flue gas
condensate is corrosive, which requires
special consideration and must be addressed
immediately.
DO NOT install baffles until you have read
Section 5, "Venting" completely.
1. To install flueway baffles, provided in
miscellaneous part cartons, as follows, refer to
Figure 2-7 and Table 2-5:
• Models MST396, MST513, and MST629 - To
install flueway baffle in 2
nd
pass flueway on
left side of boiler, hold baffle with word "Left"
readable at the top. Slide baffle in flueway
until position tab touches fins on right side
of 2
nd
pass flueway. To install flueway baffle
in 2
nd
pass flueway on right side of boiler,
hold baffle with word "Right" readable at the
top. Slide baffle in flueway until position tab
touches fins on left side of 2
nd
pass flueway.
• Models MST758 and MST892 To install
flueway baffle in 3rd pass on left side of
boiler, hold baffle with word "Left" readable
at the top. Slide baffle in flueway until
position tab touches fins on left side of
3rd pass flueway. To install flueway baffle
in 3rd pass flueway on right side of boiler,
hold baffle with word "Right" readable at
the top. Slide baffle in flueway until position
tab touches fins on right side of 3rd pass
flueway. To install flueway baffle in 2nd pass
on left side of boiler, hold baffle with word
"Left" readable at the top. Slide baffle in
flueway until position tab touches fins on left
side of 3rd passway. To install flueway baffle
in 2nd pass flueway on right side of boiler,
hold baffle with word "Right" readable at the
top. Slide baffle in flueway until position tab
touches.
• MST892 - To install the combustion chamber
ring, place in the center of the combustion
chamber. The positive stop will meet the
front of the front section, positioning the
Combustion Chamber Ring towards the
front.
Boiler
Model
Baffle Usage
2
nd
Pass
3
rd
Pass
Combustion
Chamber
Ring
MST288
None
MST396
(2)
100042-01
None
None
MST513
MST629
MST758
(2)
112524-01
(2)
112525-01
MST892
(2)
100042-01
(2)
100081-01
(1)
112523-01
Table 2-5: Baffle Usage
2
Unit-Pak Boiler Assembly
(continued)
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