Service manual

505894 41
Section 5 Service Procedures
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
To reduce the risk of electric shock, fire, explosion, serious injury or death:
• Disconnect electric power to the dryer(s) before servicing.
• Close gas shut-off valve to gas dryer(s) before servicing.
• Never start the dryer(s) with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the dryer is properly grounded.
W001R1
WARNING
45. BURNER SYSTEM COMPONENTS (Gas
Models)
a. While supporting the access panel, remove two
screws from bottom edge of access panel. Refer
to Figure 7.
b. Gently lower the access panel to disengage
locators from bottom edge of front panel. Refer
to Figure 16.
c. Complete Gas Valve Assembly.
(1) Silicon Carbide Ignition: Close main gas
shut-off valve, disconnect igniter wires at
disconnect blocks, sensor wires from
sensor terminals, and wires from gas valve
coils at the quick disconnect blocks. Refer
to Figure 19.
Silicon Nitride Ignition: Close main gas
shut-off valve, disconnect wire harness
from igniter and sensor assembly, and from
gas valve coils at disconnect blocks. Refer
to Figure 19.
(2) Disconnect gas shut-off valve from gas
valve at the union nut. Refer to Figure 19.
(3) Remove three screws holding valve and
mounting bracket to base. Refer to
Figure 19.
(4) Lift gas valve and mounting bracket from
base. Refer to Figure 19.
NOTE: The holding and booster coil, secondary
coil, main coil and redundant coil can be replaced
individually.
d. Burner Tube, Igniter and Bracket
NOTE: Burner tube and igniter can be removed
without removing gas valve and bracket.
(1) Remove one screw from right side of
burner housing holding burner tube in
place. Refer to Figure 21.
(2) Gently move burner tube toward rear of
dryer to disengage tab from slot on left side
of burner housing. Refer to Figure 19.
(3) Carefully rotate burner tube and igniter
counterclockwise so tab is at 8 o’clock
position.
(4) Move air shutter end of burner tube slightly
to right and CAREFULLY remove burner
tube and igniter assembly out through front
of dryer.
(5) Remove screw holding igniter and bracket
to burner tube and remove igniter and
bracket. Refer to Figure 20.
IMPORTANT: Use care while removing igniter to
avoid damage. The igniter is very fragile.
IMPORTANT: Handle igniter by grasping the
white ceramic portion of bracket only. DO NOT
handle silicon carbide portion of igniter with hands
or allow it to be contaminated by oil, grease or other
foreign material. Oil, grease and other impurities or
hairline cracks will cause igniter to burn out.
e. Sensor (Silicon Carbide Ignition):
(1) Remove wires from sensor terminals. Refer
to Figure 19.
(2) Remove screw holding sensor to burner
housing. Refer to Figure 19.
Ignition Control (Silicon Nitride Ignition):
(1) Remove wire harness from ignition control.
(2) Remove screws holding ignition control to
bracket. Refer to Figure 19.
(3) Carefully remove ignition control. Refer to
Figure 19.