Section 2 - Optiview Control Center Introduction - York YK-EP B Operation & Maintenance Manual

FORM 160.87-OM1
ISSUE DATE: 8/24/2018

SECTION 2 - 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 mo-
tor current via control of the Pre-Rotation Vanes. It is
compatible with YORK Solid State Starter (optional),
Variable Speed Drive (optional), and Electro-Mechan-
ical 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 rep-
resented in both English (temperatures in °F and pres-
sures in PSIG) and Metric (temperatures in °C and pres-
sures 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 re-
corded 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 con-
tinually advised of the operating conditions by vari-
ous 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 the DISPLAY MES-
SAGES portion of this manual.
There are certain screens, displayed values, program-
mable 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 Con-
JOHNSON CONTROLS
trol Center Service Manual. These parameters affect
chiller operation and should never be modified by any-
one other than a qualified Service Technician. They are
shown in this manual for reference only.
Advanced diagnostics and troubleshooting informa-
tion 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 in-
dividually, but also as a team. This new protocol al-
lows increased remote control of the chiller, as well
as 24-hour performance monitoring via a remote site.
In addition, compatibility is maintained with the pres-
ent 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 Set-
point 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
7. Cycling Shutdown Contacts
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