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M412616
SECTION III
Adjustments
T047SE3A
T048SE3A
T049SE3A
PROPER
AIR FLOW
INSUFFICIENT
AIR FLOW
NO AIR FLOW
AIR SHUTTER
ADJUSTING
SCREWS
AIR SHUTTER
ADJUSTING
SCREWS
AIR SHUTTER
ADJUSTING
SCREWS
Figure 29
NOTE: Burner configuration will differ between the 30, 50 and 75 pound tumblers, but flame
pattern will be as shown.
5. After air shutter is adjusted for proper flame,
tighten air shutter adjusting screw securely.
Control panel may have to be removed
temporarily to loosen air shutter screws to turn
shutter.
6. If shutter is correctly adjusted, but flame pattern is
straight up, (
Figure 29
), insufficient primary air is
flowing through tumbler and airflow switch is
improperly set. A flame pattern that flares to right
and left (
Figure 29
) indicates no air is flowing
through tumbler.
MAIN GAS BURNER AIR SHUTTER
(All Gas Models)
NOTICE: Both air inlet shutters on burner must
be adjusted so sufficient air is metered into
system for proper combustion and maximum
efficiency. Before adjusting inlet shutters be sure
that all lint is removed from lint compartment and
lint screen.
Air shutter adjustments will vary from location to
location and will depend on vent system, number of
units installed, make-up air and line gas pressure.
Opening shutter increases amount of primary air
supplied to burner while closing shutter decreases
primary air supply. Adjust air shutter as follows:
1. Unlock and open access door.
2. Start tumbler and check flame pattern. Correct air
and gas mixture is indicated if flame pattern is
primarily blue, with small yellow tips, and bends to
right of heater section. (See
Figure 29
.) Too little
air is indicated if flame is yellow, lazy and smokey.
3. To adjust air shutter, loosen air inlet shutter
adjusting screw, see
Figure 29
.
4. Open or close air shutter as necessary to obtain
proper flame intensity.
AIR FLOW SWITCH
(Gas and Electric Models, see
Figure 30
)
Air flow switch is set at factory for proper operation.
Steam models do not have an air flow switch.
However, if there is a problem with airflow switch, it
should be adjusted as follows:
NOTICE: Control panel must be in place and
access door closed before attempting to adjust
air flow switch.
IMPORTANT: Air flow switch disc must remain
closed during operation. If it opens and closes
during drying cycle, this indicates insufficient air
flow through tumbler.