2.7
Owner's of the ADC Clothes Dryer AD-200 gave it a score of 2.7 out of 5. Here's how the scores stacked up:
70
Next reverse leads to temperature sensor black to black and red to white. At that point, you will
measure approximately 1.8 amps, this is the turn on voltage of the device. If you hold the temperature
sensor in your hands and warm it, the reading will decrease corresponding to a higher current flow
(the decrease is very slight tenths of a volt).
2) The Rotational Sensor is a magnetic proximity switch that is mounted on the basket (tumbler) wrapper
on the left side of the dryer. There is a magnet mounted to the side of the basket (tumbler). After
each rotation of the basket (tumbler), the magnet passes by the proximity switch causing the contacts
to close and pulse the Phase 7 microprocessor controller (computer). Whenever the magnet is over
the proximity switch there should be contact closure.
When a drying cycle is started, the blower (squirrel cage fan) output switches on putting 24 VAC on
the blower (squirrel cage fan) contactor coil, which in turn pulls in the contactor starting the blower
(squirrel cage fan) motor turning. Through the contactor relay, this also triggers an input signal to the
Programmable Logic Controller (PLC) disabling the non-tilting function. Moments later, the basket
(tumbler and drum) begins to rotate because the output turns on thereby pulling in the basket (tumbler
and drum) forward contactor. Next, the Heat “On/Off” output will turn on if there is a call for heat,
supplying 24 VAC to the heat circuit through the safety circuits.
a) The first safety circuit is the Manual Reset Exhaust Hi-Limit, which is located on the bracket
above the lint basket with the temperature sensor. On a temperature rise of 225º F (107º C) or
higher, the thermal switch opens breaking the heat circuit.
b) A second safety circuit is the Burner Manual Reset Hi-Limit Switch located on the side of the
burner. On a temperature rise of 330º F (166º C) or higher, the thermal switch opens breaking
the heat circuit, this switch must be manually reset.
c) A third safety circuit is the Sail Switch, which is attached to the front of the burner box. This
device pulls in when the blower (squirrel cage fan) is operating correctly and verifies proper
airflow.
If ALL the safeties are properly maintained, 24 VAC will enable the Direct Spark Ignition (DSI)
Module and a try for ignition begins. The DSI module induces a spark (at the spark electrode)
and then opens (energizes) the gas valve for 8-seconds attempting to light the burner. If after
8-seconds the burner does not light off, DSI module will go into a “LOCKOUT” mode (the gas
valve will be de-energized and the spark will be removed from the ignitor) and will not try to light
the burner again until power is again cycled to the DSI module. If the spark produces a flame
then a micro amp signal is created between the flame-probe and ground, which in turn will keep
the burner on. The Heat “On/Off” output cycles the heat unless there is a fault at a safety
sensor. At the end of a cycle the air jet output turns on to clean off the blower (squirrel cage
fan). The audio alert output energizes the 24 VAC Audio Alert horn mounted on the right door,
the end of cycle output energizes the 24 VAC End of Cycle light found on the top of the front
panel.
c. PLC
1) The PLC can consist of one (1) or two (2) modules; a main module and in some cases an expansion
module is used for additional inputs and outputs.
NOTE: The information listed on page 74 is generic in nature; refer to blueprints for specific details.
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