For an on/off pressure control system, which of the following best describes the function of the controller's output signal. a. it is comapred with the upper and lower pressure limits b. it is used to fully open or fully close the control valves c. it is used as input to the pressure sensor d. it is used to adjust the pump's flow rate

For an on/off pressure control system, which of the following best describes the function of the controller's output signal. a. it is comapred with the upper and lower pressure limits b. it is used to fully open or fully close the control valves c. it is used as input to the pressure sensor d. it is used to adjust the pump's flow rate

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter22: Condensers

Section: Chapter Questions

Problem 16RQ: Explain the basic operation of a combination ORI and ORD low-ambient head pressure control valve.

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