Outside Combustion Air Control - Lennox MPB35ST-NM-B Care And Operation Instructions Manual

Outside Combustion Air Controls
Many appliances are equipped, when installed,
with an outside (make-up air) vent system
that is designed to provide the appliance with
outside make-up air for combustion when in
operation.
The outside air control lever for the outside
air system is standard on all appliances but
should not be operated if the complete system
is not installed. Refer to Figure 5. When the
complete outside air vent system is installed,
the installer will remove the securing screw
from the combustion air control lever located
on the right side of the fireplace opening.
If the securing screw has not been removed
and you have reason to believe that you have
a complete outside air system, contact your
distributor to have your appliance inspected for
the presence of the complete system. DO NOT
assume that you have this system in place.
WARNING
Do not operate the shutoff lever
unless a complete outside com-
bustion air system has been
installed with your appliance.
10
To open the outside air shutter, open the bottom
control access panel, and pull the outside air
control lever all the way out. The outside air
shutter should be fully open when the fireplace
is in use and completely closed when the fire-
place is not being used. Closing it when not in
use will prevent outside cold air from entering
the dwelling.
The hand operated outside air control lever is
located on the right side of the fireplace open-
ing. See Figure 5.
To open the outside air , open the bottom con-
trol access panel, reach into the gap between
the firebox bottom and pull the outside air
control lever all the way out.
The outside air shutter should be fully open when
the fireplace is in use and completely closed
when the fireplace is not being used. Closing
it when not in use will prevent outside cold air
from entering the dwelling.
Operate the actuator through several cycles
including the closed position. Ensuring proper
operation and freedom of movement. Return
the actuator arm to the closed position.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Outside Air Control Lever
and Securing Screw Location
Glass Front
Outside Air Control Lever
with Stop Behind
Securing Screw
Control Compartment Access Panel
Figure 5