AEC Econo-Cool Chillers - Manual (Page 35)

Page 34 AEC Water Temperature Control Units
VENT Switch
Push the VENT switch for additional manual venting.
ALARM SILENCE Button
Optional
Push the ALARM SILENCE button to silence the alarm. You should investigate the
alarm condition and restore the unit to normal operation before continuing with the
temperature control cycle.
AIR PURGE
Optional
Press the AIR PURGE switch to initiate the purge. It is a momentary switch and must
be pressed to keep the purge valve open. Releasing the switch closes the cooling/vent
and compressed air solenoid valves.
QUICK COOL Button
Optional
Press the QUICK COOL button to open the cooling valve and quickly cool the process.
4-6 Alarms
Audible/Visual General Fault Alarm
Optional
The audible/visual general fault alarm sounds if any fault triggers, such as low water
pressure, over-temperature, or pump overload. A signal from any of the safety devices
activates a horn and flashing strobe.
„ Push the
ALARM SILENCE button to silence the alarm.
The optional mechanical high temperature safety alarm is interlocked with the heater.
When triggered, the heater cuts out and the pump continues to run.
4-7 Controller Factory Setup
The controller is set up and tested at the factory for optimum operation, and doesn’t
need to be adjusted. If the controller does not work properly, or you suspect someone
has accidentally changed some settings, you can do two things. First, perform the Auto-
Tune Procedure described in the following section. If that doesn’t work, restore the
controller to the original factory settings as described later in this manual.