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Introduction
Intro-2
Go to Start of Introduction -Table of Contents
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IndexCONDENSER WITH
RECEIVER DRIER
COMPRESSOR
EVAPORATOR WITH
EXPANSION BLOCK
AND THERMOSTAT
BLOWER AND MOTOR
A/C VENTS
MAGNETIC CLUTCH
REFRIGERANT DISCHARGE LINE
REFRIGERANT SUCTION LINE
REFRIGERANT LIQUID LINE
The Table of Contents lists the chapters and gives you their page locations.
There are two separate indexes at the back of the manual. The Figure Index
describes each figure with its number and page location. The Subject Index will
help you locate each subject covered in the manual.
Each chapter begins by listing the main topics you will want to learn and
remember. Key points are repeated for your review at the close of most chap-
ters. The illustrations are explained and parts are labeled where necessary for
easy identification. You should feel free to make notes in this manual and
underline or circle anything that is important to you.
Our purpose is to give you knowledge, and confidence in your ability to work on
heavy duty air conditioning and heating systems. Your working speed and
trouble shooting skills will improve with experience.
The systems we cover here for heavy duty heating and air conditioning are
easy to understand. They are a little different from most other mechanical
systems, because they are closed (sealed) systems and have to function under
pressure to work properly. You will become familiar with a few of nature’s laws
that most of us take for granted. These concern how heat really works and the
effects of pressure under different conditions. There is a
Glossary of Terms
at
the back of this manual. The
Glossary
explains words that may be new or not
clear to you.
Safety is very important to all of us.
Chapter 6
, page 6-10, reviews safety
procedures in detail. We also use “NOTES,” “CAUTIONS,” and “WARNINGS”
in this manual. Any time you see a CAUTION, we are talking about a situation
that could lead to equipment damage or failure. A “WARNING” specifically
warns you about the potential danger to humans (the operator, the
serviceperson) when equipment use or instructions are not properly followed.
You will be handling engine coolant and air conditioner refrigerant in your
work. Both are chemicals and can be unsafe to work with when used incor-
rectly.
Figure 2
Typical off-road installation.