LESSON 4
HEATING, AIR-CONDITIONING, AND
REFRIGERATION DRAWINGS
TEXT ASSIGNMENT ...................................................................Attached Memorandum.
LESSON OBJECTIVES
Upon completion of this lesson of Heating, Air-Conditioning, and Refrigeration Drawings, you should be able
to accomplish the following in the indicated topic areas:
Elements of Heating Systems. List the basic elements of hot-water and warm-air heating systems and explain
1.
their functions.
Heating Element Symbols. Identify the graphic symbols used for heating system elements and interpret the
2.
heating elements symbols used on plumbing or heating system plans.
Air-Conditioning System Units. Describe the units which make up an air-conditioning system and how they
3.
function.
Air-Conditioning System Symbols. Identify common symbols for air-conditioning system components and
4.
interpret the meaning of these symbols as used on plans to indicate air-conditioning.
Refrigeration Elements Symbols. Identify symbols used for elements of refrigerated structures and interpret
5.
the representation of refrigeration systems on drawings.
ATTACHED MEMORANDUM
Section I. Heating
penetration to the point of use. Steam or hot-water
4-1.
INTRODUCTION
and warm-air systems are the classes in common use.
a. Heating is the operation of a system to
Hot-water heating is used extensively. Warm-air
transmit heat from a point of generation to the place
heating is probably the most familiar to you because
or places of use. To read the plan of a heating system
it is used in almost all semi-permanent construction
you should be familiar with the basic elements of
and most barracks.
heating systems and their graphic representation.
However, the design of heating installations for
c. Because of the variations, any discussion of
buildings is one of the more complex fields of
heating systems must be limited. For the same
construction and you will find that the variations of
reason, you will find a legend on heating prints
the basic type of heating systems are numerous.
covering the symbols used thereon. You should learn
the symbols for some of the more common types of
b. Heating systems are classified according to
piping, fittings, traps, valves, heat power apparatus,
the medium used to carry heat from the point of
and fluid power diagram symbols. Some of
161
Previous Page
