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To answer the following questions refer to Figure 12–10. When the thermostat contacts close the blower motor starts and the heating elements turn on normally. When the thermostat contacts open, the heating elements turn off and the blower motor stops running immediately. Which of the following could cause the problem? a. The thermostat contacts did not open. b. The flow switch contacts did not open. c. The fan thermostat contacts did not close. d. BMR coil is open. FIG. 12–10 Air flow must be present before heating elements can be energized.

BuyFind

Electric Motor Control

10th Edition
Herman
Publisher: CENGAGE L
ISBN: 9781133702818
BuyFind

Electric Motor Control

10th Edition
Herman
Publisher: CENGAGE L
ISBN: 9781133702818

Solutions

Chapter
Section
Chapter 12, Problem 4SQ
Textbook Problem

To answer the following questions refer to Figure 12–10.

When the thermostat contacts close the blower motor starts and the heating elements turn on normally. When the thermostat contacts open, the heating elements turn off and the blower motor stops running immediately. Which of the following could cause the problem?

  1. a. The thermostat contacts did not open.
  2. b. The flow switch contacts did not open.
  3. c. The fan thermostat contacts did not close.
  4. d. BMR coil is open.

Chapter 12, Problem 4SQ, To answer the following questions refer to Figure 1210. When the thermostat contacts close the

FIG. 12–10 Air flow must be present before heating elements can be energized.

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