MCCCD Program Description

Latitude Chiller: York Chiller Air Cooled Variable Driven Screw Compressor (YCAV

Course: JCI190

First Term: 2011 Fall

Lecture 2 Credit(s) 2 Period(s) 2 Load
Subject Type: Occupational
Load Formula: S

Description: Familiarization with theory, architecture, installation, wiring, commissioning, operation, maintenance, and troubleshooting of the YCAV chiller.

MCCCD Official Course Competencies
1. Identify components located in the control panel. (I) 2. Explain the operation of components located in the control panel. (II) 3. Follow the electrical diagrams to understand sequence of operation. (III) 4. Explain the location and operation of the YCAV variable speed drive (VSD) cooling system. (IV) 5. Demonstrate proper operation of the Latitude YCAV Chiller Control Panel. (V) 6. Determine proper site requirements. (VI) 7. Verify proper system operation (commissioning). (VII)
MCCCD Official Course Competencies must be coordinated with the content outline so that each major point in the outline serves one or more competencies. MCCCD faculty retains authority in determining the pedagogical approach, methodology, content sequencing, and assessment metrics for student work. Please see individual course syllabi for additional information, including specific course requirements.

MCCCD Official Course Outline
I. Identify Control Panel Components A. Autotransformer B. Circuit breaker disconnect C. Main line fuses D. Transient suppressor board E. AC line inductor F. Control power transformer G. Control board H. Control board transformer I. Liquid crystal display (LCD) J. Keypad K. Relay output boards L. Flash tank feed and drain valve controller transformer M. Condenser fan contactors N. VSD board O. Silicon controlled rectifier (SCR) board transformer P. SCR /diode modules Q. Insulated gate bipolar transistor (IGBT) gate driver boards R. IGBT modules S. Direct current (DC) bus voltage isolation board T. DC link filter capacitors U. Equalizer/bleeder resistors V. Current transformer W. Derivative volt/derivative time (dV/dt) output suppression network II. Explain Control Panel Components A. Autotransformer B. Circuit breaker disconnect C. Main line fuses D. Transient suppressor board E. AC line inductor F. Control power transformer G. Control board H. Control board transformer I. Liquid crystal display (LCD) J. Keypad K. Relay output boards L. Flash tank feed and drain valve controller transformer M. Condenser fan contactors N. VSD board O. Silicon controlled rectifier (SCR) board transformer P. SCR /diode modules Q. Insulated gate bipolar transistor (IGBT) gate driver boards R. IGBT modules S. Direct current (DC) bus voltage isolation board T. DC link filter capacitors U. Equalizer/bleeder resistors V. Current transformer W. Derivative volt/derivative time (dV/dt) output suppression network III. Electrical Circuits A. 460 volts B. 120 volts C. 24 volts IV. Cooling System A. Coolant pump control B. VSD cabinet cooling fans V. YCAV control panel A. Number of compressors B. Compressor frequency C. Acceleration/deceleration rate D. Loading/unloading of compressors E. Load limiting control F. Flash tank drain and feed valve controller G. Economizer control H. Condenser fan control I. VSD temperature control, coolant control, and cabinet fan control J. Remote temperature control K. Sound limit control L. VSD control VI. Site Requirements A. Location 1. Outdoor 2. Indoor B. Clearances C. Vibration isolators D. Chilled liquid piping E. Water treatment F. Piping arrangement G. Refrigerant relief valve piping H. Ductwork connections I. Electrical connection J. Power wiring K. Systems inputs VII. System Operation (Commissioning) A. Refrigerant charge B. Oil line valves C. Compressor oil fans D. Isolation/protection E. Power connections F. Grounding G. Water systems H. Flow switch I. Temperature sensor(s) J. Programmed options K. Programmed settings L. Interlocks M. Start-up N. Oil pressure O. Refrigerant flow P. Loading Q. Condenser fan rotation suction superheat R. Subcooling

MCCCD Governing Board Approval Date: 5/24/2011

All information published is subject to change without notice. Every effort has been made to ensure the accuracy of information presented, but based on the dynamic nature of the curricular process, course and program information is subject to change in order to reflect the most current information available.