chap 16 Residential Air-Conditioning Control Systems

Most residential condensing units require control voltage of ________?

24 volts

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

Air to air

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.

Furnace

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.

air-cooled

What is the purpose of using supplemental heat on a heat pump?

all of the these

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.

condensing unit

Which of the following would not be used to supply air for a split system air conditioning installation?

condensing unit

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.

false

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

false

Which of the following items would not be used in a heat pump?

gas valve

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

heat pump

A(n) ________ is used to reverse the flow of refrigerant in a mechanical refrigeration system.

reversing valve

What does the terminal "O" on a heat pump thermostat control?

reversing valve

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

series

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

thermostat

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.

true

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

true

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

true

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

true

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

true

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.

water-to-air packaged

A packaged air-conditioner unit is built ___________.

with all of the components in one unit