Section 6
Polystat 6-3
Cole Parmer
Controller PID Values
Cole Parmer recommends that only a qualified technician change PID
parameters. Incorrect PID values will hamper chiller performance
.
The factory preset PID values are:
P = 20.0
I = 0.50
D = 0.00
Inadequate temperature control
Check the reservoir level. Fill if necessary.
Verify the setpoint.
Make sure the condenser is free of dust and debris.
Check the fluid concentration.
Ensure chiller installation complies with the site requirements in Section 3.
Make sure supply voltage matches chiller nameplate rating ±10%.
If the temperature continues to rise, make sure your application's heat
load does not exceed the rated specifications.
Check for high thermal gradients (e.g., the application load is being turned
on and off or rapidly changing).
Some installations require PID value adjustment. Contact us for
instructions.
Chiller shuts down
Ensure
button wasn't accidently pressed.
Ensure the circuit protector is in the on (
I
) position.
Check the controller for error codes.
Make sure supply voltage is connected and matches the chiller's nameplate
rating ±10%.
Restart the chiller.
Summary of Contents for 12911-00
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