Step 6.
Using a 1/2” open-end wrench, remove the burner orifice.
Replace it with the #38 NG burner orifice that is supplied in
this kit. Use pipe sealing compound on the threads of the new
orifice (see
Figure 5
)
.
Figure 5 - Replace Burner Orifice
Figure 6
1/2” End Wrench
Burner Orifice
Step 7. MPI27:
a. Reinstall the shutter tube on the adjustment arm stud.
b. Reinstall the burner making sure the air venturi tube is fully seated
on the orifice. This can be verified by looking through the left air
opening in the burner
(see
Figure 6
)
.
c. Ensure the air shutter is properly adjusted (follow instructions
in the Installation and Operation manual).
Step 8. MPI27CD:
a. Reinstall the burner making sure the air venturi tube is fully
seated on the orifice, and shutter engages the adjustment arm
stud. This can be verified by looking through the left gap at the
front of the burner support panel
(see
Figure 6
)
.
b. Ensure the air shutter is properly adjusted (follow instructions
in the Installation and Operation manual).
CAUTION: The air shutter should never be set so as to make the
tips of the flames sooty or create sooting on the viewing glass,
logs, or heat exchanger. If soot begins to form after burning,
the air shutter should be opened gradually until the sooting
condition stops. Gas quality and gas pressure may vary, which
can affect the burning characteristics of the insert.
MPI27 (LOG BURNER)
MPI27CD (MEDIA BURNER)
Figure 7 - Burner Flame Appearance
No Blue Flame
Center
Soot at
Flame Tip
Dark Orange
Flame
IMPROPERLY
BURNING FLAME
Soot above
Flame Tip
No Soot at
Flame Tip
PROPERLY
BURNING FLAME
Semi-Transparent
Yellow Flame
Blue Flame
Center
Ports on Pan
Burner Assembly
Moving shutter adjustment lever to the left will
open shutter, to the right will close shutter.
Shutter Adjustment Detail
OPEN
CLOSED
Step 9.
Reinstall the log set or glass media (depending on model). See
Log Set Installation
or
Glass Media Installation
in the Installation
and Operation Manual.
Step 10.
Reinstall the glass door and facade.
Step 11.
Light the appliance per the lighting instructions label on appliance
(located on the left side of the appliance, above the control panel)
or lighting instructions in the
Installation and Operation Manual
.
Inspect for proper burner flame appearance. See
Figure 7
or
refer to the Installation and Operation Manual.
3
NOTE: DIAGRAMS AND ILLUSTRATIONS ARE NOT TO SCALE.