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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 8, Problem 21RQ
What could an oily dust spot on a condenser or evaporator coil indicate?
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Chapter 8 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 8 - The low-pressure side of the system must not be...Ch. 8 - Name and briefly describe the six classes of...Ch. 8 - The ________is both the greatest asset and the...Ch. 8 - Why should oxygen or compressed air never be used...Ch. 8 - List some of the foreign matter that may enter a...Ch. 8 - True or False: A vacuum pump can remove any type...Ch. 8 - Air in a refrigeration system causes which of the...Ch. 8 - The only two products that should be circulating...Ch. 8 - In order to remove moisture from a refrigeration...Ch. 8 - Are the best vacuum pumps one-stage or two-stage?
Ch. 8 - Name the two types of vacuum procedures used by...Ch. 8 - What can be done to get water out from under the...Ch. 8 - When evacuating a refrigeration system that has...Ch. 8 - What is today's most accurate type of deep vacuum...Ch. 8 - _________microns are in 1 inch.Ch. 8 - Briefly describe the method for cleaning up a...Ch. 8 - What is the advantage of using large gauge lines...Ch. 8 - Why is it important to change the oil on a vacuum...Ch. 8 - Describe the meaning of a deep vacuum, and explain...Ch. 8 - List the main advantages of a microfoam leak...Ch. 8 - What could an oily dust spot on a condenser or...Ch. 8 - Why should a condenser be covered with a sheet...Ch. 8 - Leaks that occur only when the unit is in...Ch. 8 - Briefly describe a combination-dependent leak.
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- What are two methods used to evaporate condensate from the evaporator?arrow_forwardWhy should a condenser be covered with a sheet before leak checking it with an electronic detector?arrow_forwardWhich of the following statements is not true about orifice tube systems? The suction line must be cool to the touch from the evaporator outlet to the compressor. The liquid line from the condenser outlet to the evaporator inlet should be cool. The evaporator should feel very cold. The accumulator must be cool to the touch.arrow_forward
- Where would a technician encounter freezing temperatures when working with liquid refrigerant?arrow_forward33. An open drive condensing unit has the following factory delivered options. Compressor maximum speed 550 rpm Compressor pulley size 600mm • Factory supplied motor pulley size 200mm • Motor speed rating 1400 rpm Pre-commissioning tests suggest that the suction pressure is too high, the system capacity is below requirement, and the compressor speed needs to be increased. Assuming that the motor has an adequate power rating to drive the compressor to its maximum speed, what size motor pulley would be required to increase the compressor speed by an additional 10%? Áll calculations can be rounded to the nearest unit of 10. All calculations are to be shown.arrow_forwardWhat types of hydronic heating systems are in use?arrow_forward
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