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GP Series Portable Chillers Chapter 4: Operation 31 of 73
appear.
Figure 10 - Operator Setpoints Screen
5. Depress
to move the cursor to the Leaving Temp line. Use the or
button to increment or decrement the value. Depress to accept the
value and move the cursor down one line.
6. Depress the
button twice to return to the main status screen.
7. Depress the
to start the chiller.
8. Check pump rotation
9. Check the pump amp draw and pump pressure. Make sure that the amp draw
reading is within the running load and service factor amps.
10. Operate the chiller, looking for any leaks and listening for unusual noises or
vibrations that could indicate improper operation.
Elevated sound level and substantially reduced current draw indicate reverse
rotation. After several minutes of operation, the compressor internal protector
trips.
4-3 Status Screens
The controller has eight (8) preconfigured status screens. The main status screen (shown in
Figure 11) shows the main operating points of the chiller: Entering and Leaving fluid
temperatures; Leaving fluid setpoint, pump discharge pressure, tank fluid level (depth), and
percentage of hot-gas bypass output.
Figure 11 - Main Status Screen
Depressing
cycles through the following screens (shown below) – Analog I/O, Digital
I/O, and Test. The Analog and Digital I/O screens provide status of all of the inputs and