Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Textbook Question
Chapter 14, Problem 1RQ
Why is a low-voltage thermostat normally more accurate than a high-voltage thermostat?
Expert Solution & Answer
To determine
The reason for high accuracy of low voltage thermostat then high voltage thermostat.
Explanation of Solution
Thermostat:
Thermostat is an electronic device which used to sense the temperature of physical system.
Thermostat is of two types.
- Low voltage thermostat
- High voltage thermostat
Low voltage thermostat:
Low voltage thermostat operating voltage is
Generally low voltage thermostat is Powered by step down transformer.
It is used in electric furnaces, single stage heat pump and multistage heating and cooling heat pumps.
High voltage thermostat:
High voltage thermostat operating voltage is
It is used in wall mounted mini split system, baseboard heaters, single zone system, electric space heaters.
The response of high voltage thermostat which contains a large bimetal would be slow to the air temperature changes thus, low voltages controls are more efficient than high voltage thermostat.
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Chapter 14 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 14 - Why is a low-voltage thermostat normally more...Ch. 14 - The three kinds of switching mechanism used in...Ch. 14 - Prob. 3RQCh. 14 - What does a cold anticipator do?Ch. 14 - Define system overshoot when dealing with...Ch. 14 - Prob. 6RQCh. 14 - Prob. 7RQCh. 14 - Describe the method a service technician should...Ch. 14 - Explain how microelectromc or electrontc...Ch. 14 - Prob. 10RQ
Ch. 14 - What component steps down the voltage to the...Ch. 14 - Low voltage is desirable for residential control...Ch. 14 - What is the maximum amperage usually encountered...Ch. 14 - Prob. 14RQCh. 14 - Prob. 15RQCh. 14 - What two types of switches are normally found in...Ch. 14 - Prob. 17RQCh. 14 - Prob. 18RQCh. 14 - Why is a line-voltage thermostat mounted on an...Ch. 14 - What is the principle of operation for most...Ch. 14 - Describe a method for speedmg up the cooling of an...Ch. 14 - Describe two methods for cooling an overheated...Ch. 14 - How can an electronic thermometer be used in a...Ch. 14 - A temperature-sensing device used in measuring...Ch. 14 - How does a thermocouple change with a temperature...Ch. 14 - True or False: Pressures below atmospheric...Ch. 14 - Name one function of the low-pressure control.Ch. 14 - Which is true of a high-pressure control? A. It...Ch. 14 - Name two types of water pressure control.Ch. 14 - Why should a safety control not be adjusted if it...Ch. 14 - Prob. 31RQCh. 14 - True or False: A change in the differential...Ch. 14 - True or False: A change in the differential of a...Ch. 14 - Prob. 34RQCh. 14 - Explain what is meant by the range of a...
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