Electricity for Refrigeration, Heating, and Air Conditioning
9th Edition
ISBN: 9781285179988
Author: Russell E. Smith
Publisher: Cengage Learning
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Chapter 5, Problem 18RQ
A factual diagram is _____.
- a. a pictorial diagram with wire colors denoted
- b. a combination of pictorial and installation wiring diagrams
- c. a combination of schematic and pictorial wiring diagrams
- d. none of the above
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Section 5-2: Line Diagrams-Signals,
Decisions, and Actions
In the following application, a temperature switch controls a heating contactor and a flow switch is used to
ensure there is enough air flow. If there is not enough air flow, an alarm is sounded. Complete the required
information.
1. List all the signal devices in the circuit.
2. List all the action devices in the circuit.
3. List the decision part of the circuit that automatically sounds the alarm if there is a problem.
4. When the heating element is on during normal operation, is the flow switch open or closed?
CIRCULATING
2
L1
FAN
TEMPERATURE
SWITCH
TR
HEATING
ELEMENTS
FLOW
SWITCH
-HOT AIR
PADDLE
AIR FILTER
NORMALLY CLOSED
FLOW SWITCH
65
ALARM
(SOUNDS IF NO FLOW FOR
15 SECONDS OR MORE)
Date
HEATING
CONTACTOR
TR
ON-DELAY
TIMER
SUPPLY AIR
COLD AIR
(3) TIME SET= 15 SEC
© 2014 American Technical Publishers, Inc.
All rights reserved
Chapter 5 Solutions
Electricity for Refrigeration, Heating, and Air Conditioning
Ch. 5 - What are the three types of electrical diagrams...Ch. 5 - A load is an electrical device that __________. a....Ch. 5 - What is the major load of an air-conditioning...Ch. 5 - Identify the following symbols for loads:Ch. 5 - Prob. 5RQCh. 5 - What do the terms normally open and normally...Ch. 5 - What is the difference between a magnetic starter...Ch. 5 - Prob. 8RQCh. 5 - Draw a heating and a cooling thermostat and...Ch. 5 - A three-pole contactor would allow how many paths...
Ch. 5 - A disconnect switch is used to __________. a. open...Ch. 5 - What determines whether a pressure switch opens or...Ch. 5 - Identify the following symbols for...Ch. 5 - What is the difference between a thermal overload...Ch. 5 - What is the purpose of a transformer? Draw the...Ch. 5 - Which of the following is not a requirement for an...Ch. 5 - What is the purpose of a legend on a schematic...Ch. 5 - A factual diagram is _____. a. a pictorial diagram...Ch. 5 - Identify the following symbols for safety devices.Ch. 5 - Prob. 20RQCh. 5 - True or False: The schematic diagram tells service...Ch. 5 - What is the difference between a pilot duty and a...Ch. 5 - What type of switch would be used to open or close...Ch. 5 - What is the purpose of a fuse in an electrical...Ch. 5 - True or False: A solenoid valve is a device that...Ch. 5 - What is a signal light used for in a control...Ch. 5 - Change the following normally open elements from...Ch. 5 - Draw the symbols for the following electrical...Ch. 5 - Add letter designations to the symbols to indicate...Ch. 5 - Draw a symbol for a magnetic starter.
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- What is a software switch?arrow_forwardWhat is the disadvantage of wiring components to a terminal strip?arrow_forwardFrom the following identify the true statement relating to the term Preventive maintenance The maintenance done after the failure of machine and can't save energy during the process. O The maintenance done before the failure of machine and can save energy during the process. O The maintenance done before the failure of machine and can't save energy during the process. The maintenance done after the failure of machine and can save energy during the process.arrow_forward
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