Owner manual

GC Series Central Chillers Chapter 4: Operation 40 of 79
2. Depress the or button to highlight SETTINGS and press . If
passwords were setup (See Section 3-12 for information on the controller
passwords) the password screen will appear.
Enter the Operator Password by depressing the to move the position of
the cursor, and then depressing the or button to increment or
decrement the number. Once all of the numbers have been entered depress
the to accept the password. The following screen will appear.
Figure 16: Operator Setpoints Screen
3. 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.
4. Adjust the Hi Temp Warning and Hi Temp Fault in the same manner.
5. Depress the button twice to return to the main status screen.
4-6 Alarms
The controller is setup with multiple alarms, most of them configurable using the Supervisor
password. Section 4-5 Controller Setpoints on page 38 gives a list of alarms that the
controller is setup to display. The alarms are broken up into two categories – warnings and
faults. The warning notifies the user that the parameter has been exceeded and the chiller is
allowed to keep operating, but should be monitored to determine the cause of the warning.
The fault notifies the user that the parameter has been exceeded and the chiller and pump has
been shut down to protect the system.
4-7 Optional Communications
The communications function allows you to monitor and set the parameters by a program
prepared and running on a host computer connected to the controller.