Table of Contents
Advertisement
FORM 160.72-O1 (810)
seCTion 3 - opTivieW ConTrol CenTer
inTroduCTion
The Optiview™ Control Center is a microprocessor
based control system for R-22 or R134a centrifugal
chillers. It controls the leaving chilled liquid tempera-
ture via pre-rotation vane controls and has the ability
to limit motor current via control of the pre-rotation
vanes. It is compatible with 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 rep-
resented in both English (temperatures in °F and pres-
sures in PSIG) and Metric (temperatures in °C and
pressures in kPa) mode.
The Control Center continually monitors the system op-
eration and records the cause of any shutdowns (Safe-
ty, 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 warn-
ing messages. In addition, it may be configured to no-
tify the user of certain conditions via alarms.
There are certain screens, displayed values, program-
mable setpoints and manual control shown in this man-
ual 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 the Service
Instructions (Form 160.72-M1). 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 ref-
erence only.
JOHNSON CONTROLS
Advanced Diagnostics and troubleshooting informa-
tion for Service Technicians are included in the Service
Instructions (Form 160.72-M1). Also included in the
service manual are detailed descriptions of chiller fea-
tures, such as the Hot Gas Bypass Control, Interstage
Valve control, PID Tuning control, Remote Setpoints,
and Input/Output Sensor tuning.
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:
•
Remote Start
•
Remote Stop
•
Remote Leaving Chilled Liquid Temperature
Setpoint adjustment (0-10VDC, 2-10VDC,
0-20mA or 4-20mA) or Pulse Width Modulation
•
Remote Current Limit Setpoint adjustment
(0-l0VDC, 2-10VDC, 0-20mA or 4-20mA) or
Pulse Width Modulation
•
Remote "Ready to Start" Contacts
•
Safety Shutdown Contacts
•
Cycling Shutdown Contacts
3
11
Advertisement
Table of Contents
