AD Series Dehumidifying Dryers Page 47
3-2. The process/regen blower is started.
3-3. The regen heater is turned on and the regeneration
timing sequence is initiated. The regen heater is
controlled by the E5C2 controller. Default timing for
regeneration is 35 minutes for HEATING and 30
minutes for COOLING.
4.) If either the left or right bed safety temperature switch opens, a
regen heater fault is generated. “HIGH TEMP” is displayed
on the relay screen. The alarm horn and light are activated.
The process heater, regen heater, and process/regen blower are
turned off. Pressing the ALARM RESET pushbutton will
deactivate the alarm horn and light.
Turn the Off-On-Start switch to the START position to restart
the dryer. If the switch is still open, the dryer will not restart.
5.) If the OMRON controller faults, the optional redundant high
temperature safety device opens, or the process heater safety
switch opens, a process heater fault is generated. “HIGH
TEMP” is displayed on the relay screen. The alarm horn and
light are activated. The process heater, regen heater, and
process/regen blower are turned off. Pressing the ALARM
RESET pushbutton will deactivate the alarm horn and light.
Turn the Off-On-Start switch to the START position to restart
the dryer. If the fault condition still exists, the dryer will not
restart.
6.) If the process blower overload trips, a process blower fault is
generated. “PROC BLWR” is displayed on the relay screen.
The alarm horn and light are activated. The process heater,
regen heater, and process/regen blower are turned off.
Pressing the ALARM RESET pushbutton will deactivate the
alarm horn and light.
Reset the motor overload and turn the Off-On-Start switch to
the START position to restart the dryer.
7.) The valve position limit switch enables the right bed heater and
provides an input signal to the programmable relay when
actuated by the cam lobe. Each heater is ON-OFF controlled
by the OMRON E5C2 controller.
8.) Upon completion of the HEAT portion of the regeneration
sequence, the regen heaters are disabled by the programmable
relay and the COOL time begins.
9.) Once the COOL time has expired, the valve motor is turned on
until the cam switch makes a transition. Upon making a
transition, the timing sequence is restarted for the new bed.
10.) When no fault conditions exist, the display reads “SYSTEM
NORMAL”.
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