What is the primary purpose of the low-pressure control in a heat pump?
a. Cycles compressor off on low loads
b. Prevents refrigerant floodback
c. Protects against loss of charge
d. Prevents outdoor coil icing
Question 2
Which of the following statements is correct?
a. Electronic defrost controls use logic to determine the need for a defrost cycle.
b. Mechanical defrost controls are significantly cheaper than electronic models.
c. A defrost cycle starts as soon as the coil temperature is below the setpoint.
d. Mechanical defrost controls base defrost cycles on time alone.
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A typical oil pressure sending unit on a Ford V-8.