York MAXE YST Wiring Diagram

PRODUCT DRAWING
CONTRACTOR _______________________
ORDER NO. _________________________
YORK CONTRACT NO. _________________
YORK ORDER NO. ____________________
REFERENCE
DATE ________
JOB DATA:
CHILLER MODEL NO. YST ______________
NO. OF UNITS _____________
Included by YORK for Field Installation (by others) are:
®
Condenser Liquid Low Pressure Differential
Chilled Liquid Low Pressure Differential Switch
Tachometer (On Optional Turbine Gaugeboard)
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MaxE chiller design allows for ease of interfacing with
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Energy Management Systems (EMS). The OptiView
Control Center includes unit status contacts, provisions
for remote control inputs and provisions for remote
setpoint reset of leaving chilled liquid temperature and
horsepower limit for EMS interfacing. Refer to para-
graph 4 on page 2.
Five sets of unit status contacts are factory furnished
through a fi eld wiring terminal board in the OptiView
Control Center. Each set of contacts are single pole,
normally open, rated at 5 amperes resistive at 240VAC.
Chiller status contacts are provided for the unit:
• Remote Mode Ready to Start - Refer to FIG. 1.
• Cycling Shutdown - Refer to FIG. 2.
• Safety Shutdown - Refer to FIG. 3.
• Run (System Operating) - Refer to FIG. 4.
• Anticipatory Alarm - Refer to FIG. 5.
Supersedes: 160.67-PW2 (204)
M
PURCHASER ____________________________________________
JOB NAME ______________________________________________
LOCATION
ENGINEER ______________________________________________
APPROVAL
ENERGY MANAGEMENT SYSTEMS
™
™
WIRING DIAGRAM
FIELD CONTROL MODIFICATIONS
E
AX ™ MODEL YST CHILLERS (STYLE F)
_____________________________________________
DATE ________
CHILLER MODEL NO. YST ______________
NO. OF UNITS _____________
YES
Three sets of inputs are available to the EMS, allowing
for remote control of unit operation. Input device contact
rating shall be 5 milliamperes at 115 VAC. Field wiring
terminal board (TB4) in the OptiView
permits connection for the following operation:
• Remote Stop Contacts - Refer to FIG. 6.
• Remote Start Contacts - Refer to FIG. 6.
• Remote/Local Cycling Devices (Controlled Shut-
down) Refer to FIG. 7.
It is possible to limit the power consumption of the chiller
indirectly or directly by the following methods.
1. Chilled liquid pump control contacts (Refer to Notes
7 & 8 on Page 15) are provided, allowing for effi cient
automatic operation of the chilled liquid pump to
reduce energy. The chilled liquid pump is not started
until after the turbine has been slow rolled, when the
ramp-to-rated speed is initiated. It is run during opera-
tion and coast down then automatically stopped 70
seconds after the drivetrain has coasted to a complete
stop.
Form 160.67-PW2 (1007)
CONSTRUCTION
DATE ________
NO PER UNIT
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Control Center
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