Operation; Yhau-Cgn/H-Cxr(M) Control Center; Common Items - Johnson Controls York YHAU-CGN-CXR Series Installation, Commissioning, Operation, And Maintenance

Operation

YHAU-CGN/H-CXR(M) control center

The YHAU-CGN/H-CXR(M) control center, furnished as standard on each chiller-heater, allows for
efficiency, monitoring, data recording, chiller-heater protection, and operating ease. The control
center is factory-mounted, wired, and tested. It used as a control system for lithium bromide
absorption chiller-heaters.
The panel is configured with a color TFT display with buttons that are integrated into the display. A
single button reveals a wide array of information on a large, full-color illustration of the appropriate
component. Information is easier to interpret.
The LCD display allows for a graphic animated display of the chiller-heater, its sub-systems and
system parameters. In addition, you can view the historical operation of the chiller-heater as well as
the present operation. A status bar displays at all times on all screens. It contains the System Status
Line and Details Line, the Control Source, Access Level, Time and Date.
The panel display is available in various languages. The language can be changed without having to
turn off the chiller-heater.
Data can be displayed in metric or imperial units plus keypad entry of set points to 0.1 increments.
Security access using passwords is provided to prevent unauthorized changes of set points. There
are three levels of access. Each level has its own password. There are certain screens, displayed
values, programmable set points, and manual controls not shown that are used for servicing the
chiller-heater.

Common items

Note: Buttons are listed in the order they are seen on the screen: left to right and top to
bottom.
The Control Center screens have items that are applicable to each feature of the Control Center.
This includes the following common items:
• LOCAL and REMOTE: Buttons that allow you to switch the operating location between remote
and local. The setting can be changed while the chiller-heater is operating. Press and hold the
appropriate button for 2 sec. to make the change.
• Operating Status: The display appears at the center top of the screen. It shows the following
operating conditions: Stop, Operating, and Failure Activating.
• Failure and Alarm: Warning lamps that light if the chiller-heater has a failure or a warning alarm.
• Date and Time: Shown on the upper right corner of each screen.
• OPER. and STOP: Buttons in the lower left corner to allow you to stop or start the chiller-heater.
Model YHAU-CGN/H-CXR(M)Double Effect Direct Fired Small Absorption Chiller-Heater 103