52
516514
Section 5 Service Procedures
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
42. BURNER SYSTEM COMPONENTS
(GAS MODELS)
a. Complete Gas Valve Assembly.
(1) While supporting the access panel, remove
two screws from bottom edge of access
panel. Refer to Figure 7.
(2) Gently lower the access panel to disengage
locators from bottom edge of front panel.
Refer to Figure 37.
(3) Close main gas shut-off valve.
(4) Silicon Carbide Ignition – 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 39.
Silicon Nitride Ignition – Disconnect wire
harness from igniter and sensor assembly,
and from gas valve coils at disconnect
blocks.
(5) Disconnect gas shut-off valve from gas
valve at the union nut. Refer to Figure 39.
(6) Remove three screws holding valve and
mounting bracket to base. Refer to
Figure 39.
(7) Lift gas valve and mounting bracket from
base. Refer to Figure 39.
NOTE: The holding and booster coil, and secondary
coil can be replaced individually.
b. 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 41.
(2) Gently move burner tube toward rear of
dryer to disengage tab from slot on left side
of burner housing. Refer to Figure 39.
(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 41.
IMPORTANT: Use care while removing igniter to
avoid damaging or breaking it. 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 any oil, grease or other foreign material to
contaminate it. Oil, grease and other impurities or
hairline cracks will cause the igniter to burn out.
c. Ignition Control
(1) Remove access panel as indicated in
Paragraph 19.
(2) Remove wire harness from ignition control.
(3) Remove screws holding ignition control to
bracket. Refer to Figure 41.
(4) Carefully remove ignition control. Refer to
NOTE: For information on ignition control flashes,
Refer to Paragraph 14.
d. Sensor
(1) Remove access panel as indicated in
Paragraph 19.
(2) Remove wires from sensor and igniter
terminals. Refer to Figure 39.
(3) Remove screw holding igniter and sensor
to burner housing. Refer to Figure 39.
Summary of Contents for DAM 9
Page 1: ...DAM 9 SERVICE MANUAL INDUSTRIAL DRYERS PUBLICATION DATE 02 01 516514 ...
Page 2: ......
Page 127: ......
Page 128: ......
