Course Title:
Course Number:

Operation & Essential Elements of Control Systems
CS-2 (Mechanical)

  This course combines conceptual information with hands-on experiences regarding the charging of air conditioning systems; operating conditions of typical air conditioning systems; expansion devices under load conditions; compressor efficiency; electric motors; mechanical and electrical trouble-shooting.
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DAY 1 SUBJECT:

Reading Electrical Diagrams, Electric Motors, Applications of Motors

GOAL:

For students to understand diagrams and use of motors and their application.

SUBJECT CONTENTS:

Drawing Electrical Diagrams — What motors should be used on different applications

METHODS/
TECHNIQUES:

Class room, systems room, electric room
Explain wiring diagrams and who the controls interlock with motors and motor controls.

RESOURCES:

RACT Unit 17 page 285 thru 303
Unit 18 motors and applications
Constructor Software

EVALUATION:

Questions on end of page 303 and page 317

OTHER:

Handouts of diagrams
Handouts of different types of motors

   

DAY 2 SUBJECT:

Schematic reading, electrical testing, lockout & tag out procedures
Power supplies, transformer, rectification circuits

GOAL:

For students to understand transformers, single-phase motor and capacitors.

SUBJECT CONTENTS:

Schematic reading lock out & tag out prod, power supplies, motors & motor control

METHODS/
TECHNIQUES:

Classroom, lecture, systems room, PDF, electrical room, wire & test.

RESOURCES:

RACT unit 19 & unit 20

EVALUATION:

Question in RACT, end of unit 19 and unit 20
OTHER: Handouts, system room motors and controls, electrical room motors and controls
   

DAY 3 SUBJECT:

Motors and motor starting. Three-phase motor, across the line start. Part start wiring and two speed compressors.

GOAL:

For student to understand different motors, 1ph, 3ph, across the line start and part start winding.

SUBJECT CONTENTS:

Motors starting, winding types
Two speed, three speed. Variable frequency drives.

METHODS/
TECHNIQUES:

Class room, systems room, electrical room, PDF.

RESOURCES:

Motors & Controls in shop and Electrical room
RACT

EVALUATION:

Question end of RACT unit 20
OTHER:

Handouts, motors and controls
Systems room and electrical room

   

DAY 4 SUBJECT:

Package system vs. split systems
Air and water source heat pumps schematic reading, computer augmented study.
Electrical schematic

GOAL:

For student to understand the difference between systems, air, water schematic drawing and reading.

SUBJECT CONTENTS:

RACT 43 drawing in computer room

RESOURCES:

RACT 43
Handouts
Computer course

OTHER:

Handout
Diagrams
RACT 43

DAY 5 SUBJECT:

Identify various refrigeration system components

GOAL:

For students to understand refrigeration leak, check and troubleshoot systems, computer augmented using constructor software.

SUBJECT CONTENTS:

PBF’s troubleshoot system & survey
Split systems
Computer augmented electrical

METHODS/
TECHNIQUES:

Hands-on troubleshooting in teams of 4 in systems room.
Classroom, lecture.

RESOURCES:

PBF’s system room equipment
Computer room augmentation electrical

EVALUATION:

Evaluation of computer generated drawing and completion of PBF’s

OTHER:

Handouts
Systems room equipment
Computer room software

   

DAY 6 SUBJECT:

Troubleshooting of refrigeration systems
PBF’s

GOAL:

For students to be able to troubleshoot existing refrigeration, A/C systems
Toggle wiring. Wire toggle switch boards in systems room.

SUBJECT CONTENTS:

A/C & Refrigeration unites in systems room
Wire toggle boards
METHODS/
TECHNIQUES:
Hands-on troubleshooting
Hands-on wiring of boards

RESOURCES:

Equipment in system room
RACT
Toggle boards
EVALUATION: PBF completion grading
OTHER: Handouts
Completion of boards
   

DAY 7 SUBJECT:

Controls and switches
Schematic development of circuits

GOAL:

For student to understand controls SPDT switches. Control and different voltage.
Schematic development

SUBJECT CONTENTS:

DPST switches, control circuits that contain various voltages and switches

METHODS/
TECHNIQUES:

PBF, systems room, lecture room
Computer room, electrical room

RESOURCES:

Systems room equipment, computer room software.
Electrical (controls in electric room)

EVALUATION:

PBF completion computer room completion

OTHER: Handouts
   

DAY 8 SUBJECT:

Make equipment list and identify components of HVAC system. VAV boxes and chiller package system.

GOAL:

For student to be able to identify and understand functions of units in systems room.

SUBJECT CONTENTS:

VAV boxes, chiller, package system and built up system
Computer, smoke purge system, survey data into computer.

METHODS/
TECHNIQUES:

PBF’ unites in systems room
Computer data input

RESOURCES:

System room equipment
Computer room
RACT unit 17

EVALUATION:

Completion of PBF’s and data input
Question end of unit 17
   

DAY 9 SUBJECT:

Economizers, freeze protection demand controls
Toggle wiring

GOAL:

For students to be able to understand and troubleshoot economizers, freeze protectors and demand controls
Different toggle switches
DPST, SPST, SPDT, etc.

SUBJECT CONTENTS:

Systems room equipment
RACT unit 19, unit 20

METHODS/
TECHNIQUES:

Lecture, systems room, PBF’s
Computer room

RESOURCES:

RACT
Systems room
Computer software

EVALUATION:

Completion of PBF’s
Completion of computer drawing
   

DAY 10 SUBJECT:

From a job description, make a schematic and pictorial diagram, tuning it into a lab project.

GOAL:

PBF
Survey and troubleshoot a unit, split system and built up HVAC system

SUBJECT CONTENTS:

Equipment in systems room

METHODS/
TECHNIQUES:

Systems room survey and troubleshoot system in groups of 4.

RESOURCES:

Systems room equipment

EVALUATION:

Completion of PBF’s
   

DAY 11 SUBJECT:

Survey and troubleshoot rooftop, split system and built up systems

GOAL:

For students to understand survey and troubleshooting of rooftop, split systems and package systems
Electrical switches and controls

SUBJECT CONTENTS:

Units in systems room
Lecture room
Computer room

METHODS/
TECHNIQUES:

Lecture room, computer software and hands-on troubleshooting. PBF’s.

RESOURCES:

RACT
Computer software
Equipment in systems room

EVALUATION:

Completion of PBF
Completion of computer projects
Handouts
   

DAY 12 SUBJECT:

Install controls and understanding operation.

GOAL:

For students to install reverse acting controls, tower fan cycling, low ambient and motor master controls

SUBJECT CONTENTS:

Reverse acting pressure control. Tower fan cycling control and low ambient controls on split system units. Controlling head pressure in low ambient conditions.

METHODS/
TECHNIQUES:

PBF’s

RESOURCES:

Systems room
Handouts on different types of controls

EVALUATION:

Completion of PBF’s
   
DAY 13 SUBJECT: Complete PBF’s from class 12
Installation of motorized valves and actuators, water pumps and compressor valve plates.
GOAL: For students to perform hands-on replacement of controls, valves, and compressor repair.
SUBJECT CONTENTS: PBF’s motorized valves, actuator water pumps, and compressors.
METHODS/
TECHNIQUES:
System room hands-on replacements
Lecture room
Parts replacement
RESOURCES: RACT
Handouts
Equipment room
EVALUATION: Completion of PBF’s
   
DAY 14 SUBJECT: Final Exam
GOAL: Students present finished notebooks
OBJECTIVES: Evaluation of PBF’s and notebooks
METHODS/
TECHNIQUES:
Exam and notebooks (evaluation)