OptiView Control Center Introduction
The OptiView Control Center is a microprocessor based control system for R134a centrifugal
chillers. It controls the leaving chilled liquid temperature via Pre-Rotation Vane controls and has
the ability to limit motor current via control of the Pre-Rotation Vanes. It is compatible with YORK
Solid State Starter (optional), Variable Speed Drive (optional), and Electro-Mechanical Starter
applications.
The panel comes configured with a full screen LCD Graphic Display mounted in the middle of a
keypad interface. The graphic display allows the presentation of several operating parameters
at once. In addition, the operator may view a graphical representation 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.
The graphic display also allows information to be represented 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 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. A
complete listing of shutdown, status, and warning messages is detailed in Display messages.
There are certain screens, displayed values, programmable setpoints and manual control shown
in this manual 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 the OptiView Control Center Service Manual.
Note: These parameters affect chiller operation and should 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
OptiView Control Center – Service Instructions (Form 160.54-M1). Also included in the service manual
are 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 Building Automation System (BAS), YORK Chillers not
only work well individually, but also as a team. This new protocol allows increased remote control of
the chiller, as well as 24-hour performance monitoring via a remote site. In addition, compatibility
is maintained with the present network of BAS 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 to 10VDC, 2 to 10VDC, 0 to
20mA or 4 to 20mA) or Pulse Width Modulation
4. Remote Current Limit Setpoint adjustment (0 to 10VDC, 2 to 10VDC, 0 to 20mA or 4 to 20mA)
or Pulse Width Modulation
5. Remote READY TO START Contacts
6. Safety Shutdown Contacts
YK-EP Style B Centrifugal Chiller14
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