JOB DATA:
CHILLER MODEL NO. YK _______________ CHILLER MODEL NO. YK_____________________
NO. OF UNITS ________________________ NO. OF UNITS______________________________
TYPE OF STARTING___________________ TYPE OF STARTING ________________________
Included by YORK for Field Installation (by others) are:
YES NO PER UNIT
One – Two Unit Sequence Control Kit, Part No. 466-61597T '' _____
Condenser Water Temperature Sensor Kit, Part No. 375-01738-000 '' _____
Condenser Water Flow Switch '' _____
________________________________________________________ '' _____
________________________________________________________ '' _____
PRODUCT DRAWING
YORK INTERNATIONAL CORPORATION
P.O. Box 1592, York, PA 17405
CONTRACTOR _______________________ PURCHASER ____________________________________________
ORDER NO. __________________________ JOB NAME _______________________________________________
YORK CONTRACT NO. _________________ LOCATION _______________________________________________
YORK ORDER NO. ____________________ ENGINEER ______________________________________________
REFERENCE DATE ________ APPROVAL DATE ________ CONSTRUCTION DATE ________
Supersedes: 160.54-PW7 (799) Form 160.54-PW7 (401)
WIRING DIAGRAM
FIELD CONTROL MODIFICATIONS
MILLENNIUM
™ MODEL YK CHILLERS (STYLE E)
(INCLUDES “P” COMPRESSORS)
Millennium chiller design allows for ease of interfac-
ing with 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 tempera-
ture and current limit for EMS interfacing. See Note 7.
Five sets of unit status contacts are factory furnished
through a field 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 unit:
• Remote Mode Ready to Start – See Fig. 1.
• Cycling Shutdown – See Fig. 2.
• Safety Shutdown – See Fig. 3.
• Run (System Operating) – See Fig. 4.
• Anticipatory/Alarm – See Fig. 5.
Four sets of inputs are available to the EMS, allowing
for remote control of unit operation. Input device con-
tact rating shall be 5 milliamperes at 115VAC. Field wir-
ing terminal board (TB4) in the OptiView Control Cen-
ter permits connection for the following operation:
• Remote Stop Contacts – See Fig. 6.
• Remote Start Contacts – See Fig. 6.
• Remote/Local Cycling Devices – See Fig. 7.
• Multi-unit sequence – See Fig. 8.
The chiller should not be cycled by the Energy Manage-
ment System because the large motor used to drive the
centrifugal compressor is limited to one start per 30 min-
utes. Instead, it is possible to limit the compressor motor
amp draw indirectly or directly by the following methods:
1. Application of Sequence Control Kit, so only one
unit is running, when a single unit can carry the
cooling load – See Fig. 10.
2. When multiple unit installations are controlled by
an EMS, remote start and stop contacts are avail-
able to start and stop each chiller per Fig. 6. Con-
tact rating shall be 5 milliamperes at 115 volts A.C.
ENERGY MANAGEMENT SYSTEMS
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