Technical information

4-32 OPERATION

Portable Chillers UGH024/1103

PLC CONTROL

SELECTING PID

VALUES

The PID values are set at the factory to default settings. The

values should be changed only if the water regulator valve or

the VFD are unable to maintain discharge pressure. To set the

discharge pressure setpoints from the main screen:

Press the Setup arrow.

Press the Scroll arrows to scroll through the

Setup screens. Stop when you get to the PID Reset

screen.

STATUS SETUP RUN ALM

Press arrow

PID Reset DPS FANS

Press arrow

Press the PID Reset arrow.

The PID values for Gain and Reset time display. The gain

is dimensionless (i.e. has no units) and the integral value,

or Reset time, is measured in seconds. There are no upper

or lower limits for these settings.

Press Gain: 5

Press Reset: 180 S

Use the Select Values buttons to change the gain and reset.

Press the Enter button to accept the

new value. If the PID values need to be restored to

the factory default settings scroll to the Reset Factory PID

screen from the Setup screen.

Reset Factory PID

Press arrow

Press the Reset arrow. Gain restores to 2 and Reset

restores to 180 seconds.