Service manual

68 M411433
Section 6 Adjustments
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the tumbler before servicing.
• Close gas shut-off valve to gas tumbler before servicing.
• Close steam valve to steam tumbler before servicing.
• Never start the tumbler with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the tumbler is properly grounded.
W002
WARNING
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
79. MAIN GAS BURNER AIR INLET
SHUTTERS
(All Gas Models)
Refer to Figure 41.
Air inlet shutter adjustments will vary from location to
location and will depend on the vent system, number of
units installed, make-up air and line gas pressure.
Opening the shutter increases the amount of primary air
supplied to the burner while closing the shutter
decreases the air supply. Adjust air shutter as follows:
a. Unlock and open the access door.
b. Start the tumbler and check the flame pattern.
Correct air and gas mixture is indicated if the
flame pattern is primarily blue, with small
yellow tips. Too little air is indicated if the
flame is yellow, lazy and smokey.
c. To adjust the air inlet shutter, loosen locking
screw. Control panel may have to be removed
temporarily to loosen locking screw.
d. Adjust shutter as necessary to obtain desired
flame intensity.
e. After shutter is adjusted, tighten locking screw
securely.
f. If the shutter is correctly adjusted, but the flame
pattern is straight up, insufficient air is flowing
through the tumbler and airflow switch is
improperly set. A flame pattern that flares to the
right and left, indicates that no air is flowing
through the tumbler.
The air inlet shutters on the burner must be
adjusted so sufficient primary air is metered
into the system for proper combustion and
maximum efficiency. Before adjusting the
inlet shutter be sure that all lint is removed
from lint compartment and lint screen.
W281
CAUTION
Figure 41
PROPER AIRFLOW
INSUFFICIENT AIRFLOW
NO AIRFLOW
AIR SHUTTER
ADJUSTING SCREWS
AIR SHUTTER
ADJUSTING SCREWS
AIR SHUTTER
ADJUSTING SCREWS
TU019-KT