US Army course - Refrigeration and Air Conditioning IV (Equipment Cooling) OD1750.pdf

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SUBCOURSE
OD1750
EDITION
A
REFRIGERATION AND AIR
CONDITIONING IV
(EQUIPMENT COOLING)
REFRIGERATION AND AIR CONDITIONING IV
(EQUIPMENT COOLING)
Subcourse OD1750
Edition A
United States Army Combined Arms Support Command
Fort Lee, VA 23801-1809
14 Credit Hours
INTRODUCTION
This subcourse is the last of four subcourses devoted to basic instruction in refrigeration and air conditioning.
The scope of this subcourse takes in unit components of the absorption system, including their functions and
maintenance; water treatment methods and their relationship to centrifugal systems; centrifugal water pumps and electronic
control systems, including the relationship of amplifier, bridge and discriminator circuits to electronic controls.
The subcourse consists of three lessons.
Lesson
1.
2.
3.
Direct Expansion and Absorption System.
Centrifugal Systems and Water Treatment.
Centrifugal Water Pumps and Electronic Control Systems.
Unless otherwise stated, whenever the masculine gender is used, both men and women are included.
CONTENTS
Page
Preface....................................................................................................................................................................
Acknowledgment....................................................................................................................................................
Lesson 1
Chapter
1
2
Lesson 2
Chapter
3
4
Lesson 3
Chapter
5
6
7
Centrifugal Water Pumps)...................................................................................................................................... 96
Fundamentals of Electronic Controls..................................................................................................................... 103
Electronic Control Systems ................................................................................................................................... 132
Answers to Review Exercises................................................................................................................................. 139
The passing score for ACCP material is 70%.
Centrifugal Systems ............................................................................................................................................... 46
Water Treatment ................................................................................................................................................... 77
Direct Expansion Systems .....................................................................................................................................
1
ii
iii
Absorption Systems ............................................................................................................................................... 26
Preface
YOU HAVE studied the fundamentals and commercial refrigeration and air-conditioning systems. This final volume deals
with another phase of your career ladder-equipment cooling. Since the principles of equipment cooling are common to all
refrigeration systems, your mastery of the subject should be easy. All of the systems covered in this volume can be applied
to commercial refrigeration and air conditioning.
To qualify you in equipment cooling, we will present the following systems in this volume:
(1)
(2)
(3)
(4)
(5)
(6)
(7)
Direct expansion
Absorption
Centrifugal
Water treatment
Centrifugal water pumps
Fundamentals of electronic controls
Electronic control
Keep this memorandum for your own use.
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