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OptiView Control Center
The YORK OptiView™ Control Center is a microprocessor based control system for R-134a
centrifugal chillers. It controls the leaving chilled liquid temperature through pre-rotation vane
controls and can limit motor current through control of the pre-rotation vanes.
The panel comes configured with a full screen LCD Graphic Display mounted in the middle of a
keypad interface. The can display several operating parameters at once. In addition, the operator
may view a graphical representation of the historical operation of the chiller and 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. Information can
be presented in both English (temperatures 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 languages.
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 can 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 can be configured to notify the user of certain conditions using alarms. For
a complete listing of shutdown, status, and warning messages, see
There are certain screens, displayed values, programmable setpoints and manual control shown in
this book that are for Service Technician use only. They are only displayed when logged in at Service
access level or higher. The setpoints and parameters displayed on these screens are explained in
detail in Service Manual (Form 160.69-M1-C). These parameters affect chiller operation and must
never be modified by anyone other than a qualified Service Technician. They are shown in this
manual for reference only.
Advanced diagnostics and troubleshooting information for Service Technicians are included in the
Service manual, along with detailed descriptions of chiller features, such as the Refrigerant Level
Control, Variable Speed Drive Oil Pump, Hot Gas Bypass, High Speed Thrust Bearing Proximity
Probe, Remote Setpoints, Smart Freeze Protection, and Standby Lubrication.
The control center expands the capabilities of remote control and communications. By providing
a common networking protocol through the BAS, YORK Chillers not only work well individually,
but also as a team. This new protocol allows increased remote control of the chiller and 24-hour
performance monitoring through a remote site. In addition, compatibility is maintained with the
present network of ISN communications. The chiller also maintains the standard digital remote
capabilities as well. Both of these remote control capabilities allow for the standard Energy
Management System (EMS) interface:
1.
Remote Start
2.
Remote Stop
3.
Remote Leaving Chilled Liquid Temperature Setpoint adjustment (0-10 VDC, 2-10 VDC, 0-20
mA or 4-20 mA) or Pulse Width Modulation
4.
Remote Current Limit Setpoint adjustment (0-10 VDC, 2-10 VDC, 0-20 mA or 4-2 0mA) or Pulse
Width Modulation
5.
Remote "Ready to Start" Contacts
6.
Safety Shutdown Contacts
7.
Cycling Shutdown Contacts
The chiller operating program resides in the OptiView Control Center microboard.
Software versions are alphanumeric codes that represent the application and revision level as
shown below. Each time the software is revised, the level increments.
Model YD Mod D with OptiView Control Center
Display
messages.
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