York YLAA Operation Manual page 14

FORM 150.72-EG6 (516)
Equipment Overview (Cont'd)
• Number of compressors running
• Liquid solenoid valve status
• Load & unload timer status
• Water pump status
COMMUNICATIONS
• Native communication capability for BACnet (MS/TP), Modbus and N2
• Optional communication available for LON via eLink option
BUILDING AUTOMATION SYSTEM INTERFACE
In addition to native BACnet, Modbus and N2, the YLAA chiller accepts a 4-20 milliamp
or 0-10VDC input to reset of the leaving chilled liquid temperature. The standard unit ca-
pabilities include remote start-stop, remote water temperature reset via up to two steps of
demand (load) limiting depending on model. The standard control panel can be directly
connected to a Johnson Controls Building Automated System via the standard on-board
RS232 communication port. (Factory- installed)
POWER PANEL
• Each panel contains:
• Compressor power terminals
• Compressor motor starting contactors per l.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.
FAN
FUSE
FAN
CONTACTORS
XTBF1
COMPRESSOR
CONTACTORS
14
FAN
DISCONNECT
CONTACTORS
SWITCH
GROUND
LUG
FAN
FAN
FUSE
CONTACTORS
COMPRESSOR
COMPRESSOR
CONTACTORS
OVERLOADS
FAN
CONTACTORS
LD18430
JOHNSON CONTROLS