Note: The dew point alarm monitors and indicates a deviation from the set point.

4-2 Dryer Operation Procedures

Controller Operation

1.Turn the disconnect (if applicable) on the control panel to the ON position. Power is applied to the voltage line fuses, line side of the control power switch.

2.Turn the control power switch to the ON position. Power is applied to the temperature control, programmable relay and dew point controller. The valve will move to the start position as follows:

a.The valve motor rotates until the cam switch makes 2 transitions.

b.If the cam switch does not make a transition within 10 seconds, a valve motor fault is generated. “VALVE MTR” is displayed on the relay screen, the alarm light is activated. The valve motor, heaters, and blower shut off.

To restart the dryer, cycle control power to deactivate the alarm light and restart the valve motor sequence.

Note: The relay screen which contains the Alarm Display Messages is located inside the controller enclosure. For a list of Alarm Display Messages, see Page 32.

WARNING! Do not attempt to check the Alarms on the Controller located within the unit enclosure unless you are a qualified electrician!

c.The valve will normally complete one full cycle (revolution).

If the drying process shuts down due to an alarm, the dryer has been setup to have the following operational features:

•The bed in process at power-down will remain in process.

•The bed in regeneration at power-down will remain in regeneration.

•The regeneration timing cycle will restart from the beginning.

3.Once the control power is on and no fault conditions exist, the dryer will start as follows:

a.The process/regen blower is started.

b.The process heater is turned on and controlled by the E5CN controller.

c.The regen heater is turned on and the regeneration timing sequence is initiated. For default timing settings for regeneration, see the table below.

Model

Heating

Cooling

15 cfm

15

50

30 cfm

 

 

60 cfm

15

50

15, 30, & 60 cfm Compact Dryers

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Sterling 882.00291.00 specifications Dryer Operation Procedures, Controller Operation
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882.00291.00 specifications

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