ALLIANCE BTEBCFSP171TW01 BTEBEFSP171TW01, Руководство по устранению неисправностей

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802748
Dryer Test 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 all electric power to the machine and accessories before servicing.
• Close gas shut-off valve to gas dryer before servicing.
• Never start machine with any guards/panels removed.
• Whenever ground wires are removed during servicing, these ground wires must be
reconnected to ensure that the machine is properly grounded.
• Washer motor not grounded! Disconnect electric power before servicing motor.
W502
WARNING
58. Burner System Operation
(Gas Models – Refer to Figure 36 .)
a. Components
This burner has four basic components: a
silicon carbide (glow bar) igniter, burner tube,
sensor, and a two-stage gas valve consisting
of a split-coil valve and a secondary coil
valve. The split-coil valve is opened when the
dryer thermostat calls for heat, while the
secondary valve does not open until the
igniter has attained ignition temperature.
b. Pre-Ignition Circuits
When the dryer thermostat calls for heat,
circuits are completed through the holding
coil, sensor, booster coil and igniter. Both
coils must be energized to open the split-coil
valve. Once opened, the holding coil can hold
the valve open without assistance from the
booster coil. The sensor triggers the current to
travel around the secondary coil and through
the igniter, causing the igniter to get hot.
c. Burner Circuit
In approximately 30 seconds, the igniter
attains ignition temperature and ignition is
made. The heat from the burner flame causes
the sensor contacts (located on burner housing
beside the igniter) to open. A circuit is then
completed through the secondary valve coil,
opening the valve and allowing gas to flow.
d. Momentary Power Interruption
Upon resumption of power, sensor contacts
will still be open, permitting secondary valve
to open. However, with the secondary coil in
the circuit, the booster coil cannot draw
enough current to open the split-coil valve.
When sensor contacts do reclose, the
secondary valve will close, and the burner
system will be in the normal pre-ignition
circuit.
e. Flame Failure
In case of flame failure, the sensor contacts
will re-close in about 45 seconds. This will
close the secondary valve and the burner
system will be in the normal pre-ignition
circuit.
f. Ignition Failure
If flame is not established as sensor contacts
open, secondary valve will remain open until
sensor contacts re-close. Sensor will continue
to recycle the igniter and secondary valve
(about once per minute) until ignition is made
or dryer is turned off.
Figure 36
Secondary
Coil
Holding Coil
and
Booster Coil
(Split Coil Valve)
4
1
5
2 3
D267SE3B
Sensor
SECONDARY
COIL
HOLDING
COIL
BOOSTER
COIL
Igniter
120 Volt, 60 Hertz
Electrical
Supply Line
D268SE3A
(208 or 240 Volt/50 Hertz –
refer to machine serial plate)