Screw Compressor Central Chiller
Chapter 4: Operation
33
Chapter 4: Operation
4-1 Start-up
Water & Remote Air-Cooled Central Chiller Startup
1.
Start the chiller by pushing the
Start
button on the control panel of the unit.
2.
The touchscreen will display the Main Menu screen.
3.
If your chiller has been setup to control the pump tank, the recirculation pump will
turn on first, then after 5 seconds the process pump will turn on. If configured with a
standby pump, the lead/lag will control which pump turns on. See control
instructions on page 41
on how to do this.
4.
Fifteen (15) seconds after the last pump turns on the first compressor will turn on.
Based on the temperature of the water the controller will turn on compressors every
15 seconds.
5.
Adjust the Freezestat cut-out, located in the main electrical enclosure, to 10°F (6ºC)
below the process temperature set point you want. See page 19 for instructions.
Note:
If the recirculation pump does not turn on (or that the flow switch is not
satisfied) the compressors will not be allowed to turn on and you should get a
no flow alarm.
6.
Check the pump(s) amp draws and pressures. The amp draws must be within the
pump(s) running load amps.
7.
Operate the chiller, looking for leaks and listening for unusual noises or vibrations
that could indicate improper operation.
