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Figure 34
burner Flame Appearance - model mpb-3328
burner Flame Appearance - model mpb-3530
Figure 35
Figure 36
burner Flame Appearance - model mpb-4035 & mpb-4540
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Step 12. VENT OpERATION TEST
After appliance installation, perform this vent
operation test to verify that proper venting
conditions exist:
1 - Place unit in its normally-operated condi-
tion, that is, with the glass enclosure panel
in place.
2 - Close all doors and windows in the room.
Turn on all exhaust fans in the house.
3 - Light the appliance.
4 - Wait 15 minutes.
5 - To check for venting action, start by hold-
ing a smoke producing device below the
glass enclosure panel. The smoke should
be drawn into the control compartment.
Continue the test by moving the smoke
producing device along the entire length
of below the glass door.
6 - If the smoke is not drawn into the control
compartment, turn off the appliance and
call a qualified service technician.
manually-Reset Safety Limit Switch
This appliance is equipped with a manually-
reset blocked flue safety limit switch. Refer to
Figure 37 for its location. If, during appliance
operation, the flame goes out (independently
of the burner on/off wall switch), it may be
due to the operation of this safety limit switch.
First allow the appliance to cool. Remove top
louver panel. Then reset the safety limit switch
by pushing the red reset button, located between
the wire terminals, on the back of the switch.
See Detail A of Figure 37 for location.
The appliance should then relight and remain
lit. Reinstall top louver panel. If the appliance
does not relight, turn off the appliance and call
for a qualified service technician.
To replace the blocked flue safety limit switch
refer to Figure 37 (Details B and C):
NOTE - This procedure should only be performed
by a qualified service technician.
Important - Turn electrical power off before
beginning this procedure.
1 - Lower the bottom control compartment
access panel. Remove the glass enclosure
panel: open the latch (located in the center
of the unit front opening, under the firebox
floor) securing the glass enclosure panel.
Remove the panel by tilting it outward at
the bottom and lifting it up. Set the door
aside protecting it from inadvertent dam-
age. See Figure 32 on Page 21.
2 - Remove the lintel securing screws (3) and
then remove the lintel. One of the lintel
cabinet top holes is shown in Figure 37
(Detail B).
3 - Remove the scoop securing screws (3)
and then remove the scoop. See Figure
37 (Detail B).
23
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