Communications; Building Automation System Interface; Power Panel - York YLAA Series Installation Operation & Maintenance

FORM 150.72-ICOM6
ISSUE DATE: 12/29/2017
• Number of compressors
• Low liquid temperature cutout
• Low suction pressure cutout
• High discharge pressure cutout
• Anti-recycle timer (compressor start cycle time)
• Anti-coincident timer (delay compressor starts)
Unit Keys
This section is used to:
• Set time
• Set unit options
Oper Data Key
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 Johnson Controls
ISN DDC or Building Automation System (by
others) via a 4 to 20 milliamp or 0 to 10VDC input
• 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 definition
• Compressor starts and operating hours
• (each compressor)
• Status of hot gas valves, evaporator heater
and fan operation
• Run permissive status
• Number of compressors running
JOHNSON CONTROLS
SECTION 2 – PRODUCT DESCRIPTION
• Liquid solenoid valve status
• Load and 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 memo-
ry battery backed RAM 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.

COMMUNICATIONS

• Native communication capability for BACnet
(MS/TP) and Modbus.
• Optional communication available for N2 and
LON via eLink Gateway option.
BUILDING AUTOMATION SYSTEM
INTERFACE
The Microprocessor Board can accept a 4 to 20 milli-
amp, or 0 to 10VDC input to reset the leaving chiller
liquid temperature from a Building Automation Sys-
tem.
• The standard unit capabilities include remote
start-stop, remote water temperature reset via a
PWM 4 to 20 milliamp or 0 to 10VDC input sig-
nal or up to two stages of demand (load) limiting
depending on model.
• The standard control panel can be directly con-
nected to a Johnson Controls Building Automated
System.

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.
2
17