York YCAL Series - Unit On;Off; Power Panel

FORM 150.66-NM3
ISSUE DATE: 09/25/2020
19
JOHNSON CONTROLS
SECTION 2 - PRODUCT DESCRIPTION
2
Unit On/O󰀨
The microprocessor control center is capable of dis-
playing the following:
• Return and leaving liquid temperature
• Low leaving liquid temperature cutout setting
• Low ambient temperature cutout setting
• Outdoor air temperature
• English or Metric data
• Suction pressure cutout setting
• Each system suction pressure
• Discharge pressure (optional)
• Liquid Temperature Reset via a YORK ISN DDC
or Building Automation System (by others) via:
- a pulse width modulated (PWM) input as
standard.
- a 4-20 milliamp or 0 -10 VDC input, or contact
closure with the optional B.A.S. interface op-
tion.
• Anti-recycle timer status for each system
• Anti-coincident system start timer condition
• Compressor run status
• No cooling load condition
• Day, date and time
• Daily start/stop times
• Holiday status
• Automatic or manual system lead/lag control
• Lead system denition
• Compressor starts & operating hours (each compres-
sor)
* Intensity of Protection European Standard
** International Electrotechnical Commission
• Status of hot gas valves, evaporator heater and fan
operation
• Run permissive status
• Number of compressors running
• Liquid solenoid valve status
• Load & unload timer status
• Water pump status
Provisions are included for: pumpdown at shutdown;
optional remote chilled water temperature reset and
two steps of demand load limiting from an external
building automation system. Unit alarm contacts are
standard.
The operating program is stored in non-volatile mem-
ory to eliminate chiller failure due to AC powered
failure/battery discharge. Programmed setpoints are
retained in lithium battery-backed RTC memory for 5
years minimum.
Power Panel
Each panel contains:
• Compressor power terminals
• Compressor motor starting contactors per I.E.C.**
• Control power terminals to accept incoming for
115-1-60 control power
• Fan contactors and overload current protection
The power wiring is routed through liquid-tight con-
duit to the compressors and fans.