FORM 160.84-EG1 (617)
JOHNSON CONTROLS
17
OptiView Control Center
NOTE: Please refer to the OptiView Control Center Operator's Manual for a complete
description of features and functionality.
The YORK OptiView Control Center is a factory mounted, wired and tested microproces-
sor based control system for HFC-134a centrifugal chillers. For the YMC², it controls the
leaving chilled liquid temperature and limits the motor current via control of the Variable
Geometry Diffuser (VGD) and Variable Speed Drive (VSD).
LD18607
The panel comes configured with a full screen LCD Graphic Display mounted in the mid-
dle of a keypad interface with soft keys, which are redefined with one keystroke based on
the screen displayed at the time. The graphic display allows the presentation of several
operating parameters at once. In addition, the operator may view a graphical represen-
tation of the historical operation of the chiller as well as the present operation. For the
novice user, the locations of various chiller parameters are clearly and intuitively marked.
Instructions for specific operations are provided on many of the screens. To prevent unau-
thorized changes of set points and operating conditions, security access is provided with
three different levels of access and passwords.
The graphic display also allows information to be represented in both English (tempera-
tures in °F and pressures in PSIG) and Metric (temperatures in °C and pressures in kPa)
mode. The advantages are most apparent, however, in the ability to display many lan-
guages.
The Control Center continually monitors the system operation and records the cause of
any shutdowns (Safety, Cycling or Normal). This information is recorded in memory and
is preserved even through a power failure condition. The user may recall it for viewing at
any time. During operation, the user is continually advised of the operating conditions by
various status and warning messages. In addition, it may be configured to notify the user
of certain conditions via alarms. The Control Center expands the capabilities of remote
control and communications. By providing a common networking protocol through the
Building Automation System (BAS), YORK Chillers not only work well individually, but
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