York YLAA0180 - BUILDING AUTOMATION INTERFACE AND POWER PANEL; ACCESSORIES AND OPTIONS

JOHNSON CONTROLS
17
SECTION 2 – PRODUCT DESCRIPTION
FORM 150.72-ICOM7
ISSUE DATE: 10/22/2020
2
• Discharge pressure (optional)
• Liquid Temperature Reset via a Johnson Controls
ISN DDC or Building Automation System (by
others) via a 4 mA to 20 mA or 0 VDC to10 VDC
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 denition
• Compressor starts and 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 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
set points 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.
* Intensity of Protection European Standard
** International Electrotechnical Commission
BUILDING AUTOMATION SYSTEM
INTERFACE
The Microprocessor Board can accept a 4 to 20 A, or 0
to 10 VDC input to reset the leaving chiller liquid tem-
perature from a Building Automation System.
• The standard unit capabilities include remote
start-stop, remote water temperature reset via a
PWM 4 mA to 20 mA or 0 VDC to 10 VDC input
signal or up to two stages of demand (load) limit-
ing 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
110-1-50 control power
• Fan contactors and overload current protection
The power wiring is routed through liquid-tight con-
duit to the compressors and fans.
ACCESSORIES AND OPTIONS
Power Options
Compressor Power Connections
Single-point terminal block connections are provided
as standard. The following power connections are
available as options. (See electrical data for specific
voltage and options availability.) (Factory-mounted)
Single-Point Supply Terminal Block
Includes enclosure, terminal-block and interconnecting
wiring to the compressors. Separate external protection
must be supplied, by others, in the incoming compres-
sor-power wiring. (Do not include this option if either
the Single-Point Non-Fused Disconnect Switch or Sin-
gle-Point Circuit Breaker options have been included.)