Johnson Controls YORK YMC2 User Manual

Table 2: OptiView control center buttons
Button Description
The Decimal button provides accurate entry of setpoint
values.
A ± button has also been provided to allow entry of negative
values and AM/PM selection during time entry.
In order to accept changes made to the chiller setpoints, the
Check button is provided as a universal ‘Enter’ key or ‘Accept’’
symbol.
In order to reject entry of a setpoint or dismiss an entry form,
the ‘X’ button is provided as a universal ‘Cancel’ symbol.
Cursor Arrow buttons are provided to allow movement
on screens which contain a large amount of entry data. In
addition, these buttons can be used to scroll through history
and event logs.
The graphic display also allows numerical information to be represented in both English
(temperatures in °F and pressures in psig) and Metric (temperatures in °C and pressures in kPa)
mode. It also has 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 attached in Display messages.
The control center includes capabilities for remote control and communications. Common
networking protocol through the Building Automation System (BAS) allows increased remote
control of the chiller, as well as 24-hour performance monitoring via a remote site. An optional
circuit board called the SC-EQUIP provides Johnson Controls and YORK mechanical equipment such
as the YMC
2
chiller with building automation system (BAS) networking connectivity.
The chiller also maintains the standard digital remote capabilities as well. Both of these remote
control capabilities allow for the following standard Energy Management System (EMS) interfaces.
The actual connection details are in the Field Connections section of the Wiring Diagram (Form
160.84-PW1 and PW3):
• Remote Start
• Remote Stop
• Remote Leaving Chilled Liquid Temperature Setpoint adjustment: BAS coms, Analog signal,
(0-10 VDC, 2-10 VDC, 0-20 mA or 4-20 mA) or pulse width modulation (PWM)
• Remote Current Limit Setpoint adjustment: BAS coms, Analog signal, (0-10 VDC, 2-10 VDC, 0-2
0mA or 4-2 0mA) or pulse width modulation
• Remote “Ready to Start” Contacts
• Safety Shutdown Contacts
• Cycling Shutdown Contacts
YMC
2
Mod B with OptiView
™
Control Center
14

Johnson Controls YORK YMC2 Specifications

General

Brand	Johnson Controls
Model	YORK YMC2
Category	Chiller
Language	English