Deck 15: Residential Air-Conditioning Control Systems

Question 1

A split system is designed in two sections: a condensing unit and a device that is used for the air flow in the system and the heat source if it is not a heat pump.

Answer 1

True

Question 2

What is a function of a reversing valve?

Answer 2

A reversing valve is used to reverse the flow of refrigerant in a mechanical refrigeration system.

Question 3

The air flow on most structures that use a fossil fuel for a heat source have a(n) ____________________ that would be used as an air supply.

Answer 3

furnace

Question 4

The condensing unit is used to remove the heat from the refrigeration system that had been absorbed by the evaporator.

Question 5

Heat pump control systems and air-conditioning control systems are similar in many ways.

Question 6

In early control systems, almost all components necessary for the operation of the air-conditioning system were mounted on the wall near the condensing unit.

Question 7

What is a zone control system?

Question 8

The compressor is the smallest electric load in an air-conditioning system.

Question 9

The ____________________ is the portion of a split air-conditioning system that is mounted outside and generally contains the compressor, the condenser, the condenser fan motor, and the necessary devices to control these components.

Question 10

The most widely used types of packaged units in residential air-conditioning applications that use air to remove the heat from the condenser are ____________________ packaged units.

Question 11

Most safety controls used in residential control systems are connected in ____________________ with the contactor coil.

Question 12

The evaporator fan motor is controlled by an indoor fan relay controlled by the ____________________.

Question 13

Why are defrost controls used?

Question 14

What is field wiring?

Question 15

The cooling cycle of the heat pump is the same as an air-conditioning system.

Question 16

List four elements of the air-conditioning system that the total system control module must supervise.

Question 17

A(n) ____________________ heat pump system uses air to transfer the heat to the conditioned space and water as the heat transfer medium for the heat exchanger used as the condenser in the cooling cycle and the evaporator in the heating cycle.

Question 18

The ____________________ heat pump uses air as the heat transfer medium in both the indoor and outdoor coils.

Question 19

The ____________________ is a refrigeration system that reverses the refrigerant flow to effectively heat a structure in the winter.

Question 20

The first basic circuit of almost any residential control system is the device that stops and starts a compressor.