York YLAA0300HE - UNIT ON;OFF switch; HIGH AMBIENT KIT; BUILDING AUTOMATION SYSTEM INTERFACE; POWER PANEL

19
JOHNSON CONTROLS
FORM 150.72-NM3 (1020)
ISSUE DATE 10/05/2020
SECTION 2 – PRODUCT DESCRIPTION
2
UNIT ON/OFF switch
The microprocessor control center is capable of
displaying 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 pulse width modulated (PWM) input
as standard.
• 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 compressor)
• 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.
* Intensity of Protection European Standard
** International Electrotechnical Commission
The operating program is stored in non-volatile memory
(EPROM) 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.
HIGH AMBIENT KIT
Allows units to operate when the ambient temperature
is above 46°C (115°F). Includes discharge pressure
transducers.
BUILDING AUTOMATION SYSTEM
INTERFACE
The Microprocessor Board can accept a 4-20 milliamp,
0-10VDC input to reset the leaving chiller liquid
temperature from a Building Automation System.
• The standard unit capabilities include remote
start-stop, remote water temperature reset via 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 via the standard on-board RS232 com-
munication port.
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 & overload current protection
The power wiring is routed through liquid-tight conduit
to the compressors and fans.