JOHNSON CONTROLS
91
FORM 155.32-ICOM1.EN.GB
ISSUE DATE: 10/13/2017
6
SECTION 6 – OPERATION
YHAU-CGN/H CONTROL CENTER
The
YHAU-CGN/H
Control Center, furnished as stan-
dard on each chiller-heater, allows for efficiency, mon-
itoring, data recording, chiller-heater protection, and
operating ease. The Control Center is factory-mounted,
wired, and tested. It used as a control system for lithi-
um 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. In-
formation is easier to interpret.
The LCD display allows for a graphic animated dis-
play of the chiller-heater, its sub-systems and system
parameters. In addition, you may view the historical
operation of the chiller-heater as well as the present op-
eration. 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 units plus keypad en-
try of set points to 0.1 increments.
Security access using passwords is provided to prevent
unauthorized changes of set points. There are three lev-
els 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
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 applica-
ble 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 ap-
propriate 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 cor-
ner to allow you to stop or start the chiller-heater.
LD20135
