14
E. FLUEWAY BAFFLE INSTALLATION.
Flueway bafes are enclosed into Part Carton. Bafe
requirements differ by boiler model, see Table 2.
TABLE 2: BAFFLE USAGE
Figure 5C: Top View - Burner Swing Door Fully Closed but Not Properly Secured or Sealed
NOTE: Read caution statement before proceeding.
CAUTION
These bafes will generate higher efciencies
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 bafes until you have read
Section V, "Venting" completely.
1. To install ueway bafes, provided in miscellaneous
part cartons, as follows, refer to Figure 6 and
Table 2:
• Models MST396, MST513 and MST629 - To
install ueway bafe in 2
nd
pass ueway on
left side of boiler, hold bafe with word "Left"
readable at the top. Slide bafe in ueway until
position tab touches ns on right side of 2
nd
pass
ueway. To install ueway bafe in 2
nd
pass
ueway on right side of boiler, hold bafe with
word "Right" readable at the top. Slide bafe
in ueway until position tab touches ns on left
side of 2
nd
pass ueway.
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 5A).
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 x 1-3/4” tap bolt and 5/16” 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 X 1-3/4”
TAP BOLT AND 5/16” WASHER) SECOND.
Apply additional pressure while hand tightening
the hardware as far as possible and then release
the pressure.
Boiler
Model
Bafe Usage
2
nd
Pass 3
rd
Pass
MST288 None
MST396
(2)
P/N 100042-01
NoneMST513
MST629
