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WFS 101545 Operations Manual
START / STOP / ENABLE
The pumps are started and stopped and the chiller is enabled by
pressing the appropriately labeled push button. If conditions permit (no critical alarms) each
pump will start or stop immediately when the associated button is touched. The chiller is only
enabled. The chiller will only run if the temperature controller is calling for cooling.
When a pump is running or the chiller is enabled the associated indicating light will illuminate.
NOTE: To prevent freezing in the evaporator tubes the chiller can only be enabled when Pump 1
and Pump 3 are both running. If the Chiller Enable button is selected when either of these
pumps are not running a yellow indicating message will appear notifying the need to first start
these pumps.
NOTE: The chiller has an automatic “BUMP START” feature that may cause the chiller to start
momentarily and stop three times before starting continuous operation. This is normal.
AUTO START/STOP
After initial set-up, the start-up sequence can be initiated by
pressing AUTO START. This will start the pumps in proper sequence and enable the
chiller to run on demand. The ALL STOP button does exactly what it says.
ALARM
When there is an alarm condition an audible tone will pulse and the “ALARM”
light will illuminate. Touching the “ALARM SILENCE” button will silence the audible tone
FIGURE 5-3
