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 50, Problem 1RQ
Which of the following is true regarding the refrigerant piping on a rooftop package unit?
A. The discharge and liquid lines must be field installed.
B. The suction and liquid lines must be field installed.
C. The discharge and suction lines must be field installed.
D. No refrigerant lines are field installed.
Expert Solution & Answer
To determine
The true statement regarding the refrigerant piping in a rooftop package unit.
Answer to Problem 1RQ
The true statement regarding the refrigerant piping in a rooftop package unit is No refrigerant lines are field installed.
Explanation of Solution
The rooftop package unit refers to a single housing which consist all the major components of the system. This package unit is assembled in the factory and charged in the factory. This unit is a complete package of the entire essential component required for the refrigeration or heat pump. It consists
- Condensers.
- Compressors.
- Metering devices.
- Evaporators.
These components are installed in the same cabin which is called rooftop package unit. Hence, there is no need for any refrigerant line. Therefore, after the installation of the entire component in a single unit there is no requirement to install the refrigeration line in the system. Hence, the fourth statement (no refrigerant lines are field installed) is true about the refrigerant piping in a rooftop package unit.
Conclusion:
The true statement regarding the refrigerant piping in a rooftop package unit is No refrigerant lines are field installed.
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a-Write five advantages and two disadvantages of welded joints over riveted joints.
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1. A round stepped cast iron shaft of diameters d and D with shoulder fillet radius r is
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Chapter 50 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 50 - Which of the following is true regarding the...Ch. 50 - Which process would best represent the opposite of...Ch. 50 - Mixed air is best described as the combination of...Ch. 50 - Which of the following should be taken into...Ch. 50 - A bonded roof is one that has A. reinforced steel...Ch. 50 - Properly installed roof curbs will reduce the...Ch. 50 - When rigging a unit to the roof, what minimum...Ch. 50 - What is the acceptable method for communicating...Ch. 50 - Prob. 9RQCh. 50 - Prob. 10RQ
Ch. 50 - The most efficient way to establish the best...Ch. 50 - Free-cooling can be accomplished if the
A....Ch. 50 - Prob. 13RQCh. 50 - Prob. 14RQCh. 50 - Explain why the outside air damper is typically...Ch. 50 - Briefly explain the purpose of ASHRAE Standard 62.Ch. 50 - Explain the concept of demand control ventilation.Ch. 50 - Explain how carbon dioxide levels can be used to...Ch. 50 - Describe the blowers used on VAV systems.Ch. 50 - A cooling-only VAV box has all of the following...Ch. 50 - Which of the following is true regarding a reheat...Ch. 50 - Variable refrigerant flow systems sense the...Ch. 50 - The acronym PID stands for ______, _____, and...Ch. 50 - Explain the main benefit of a heat-recovery VRF...Ch. 50 - The pump on a dry cooler can direct water to...Ch. 50 - During low ambient conditions, the space cooling...
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