Exam 43: Air Source Heat Pumps

When a compressor is changed, the four-way valve also must be changed.

The smaller line in an air-to-air split-system heat pump is known as the ____ line.

An air-to-air heat pump ____ heat from the outside air and deposits it in the conditioned space.

When oil or gas auxiliary heat is used with a heat pump, the heat pump indoor coil must be located  ____________________ of the oil or gas heat exchanger.

What prevents cold air from being circulated to the heated space during the defrost cycle?

A(n) ____________________ thermostatic expansion valve has a check valve built into the body of the TXV.

The larger line in an air-to-air split-system heat pump is known as the ____ line.

What is it meant by the terminology "time or temperature terminated" defrost cycle?

The component used to switch the heat pump unit between the heating and cooling modes of operation is the ____.

Most heat pump systems are designed to operate in the heating mode when the solenoid is not energized. This is referred to as "____________________ in the heating mode".

The lowest outside air temperature at which the heat pump system can satisfy the heating needs of the structure without requiring auxiliary heat is called the ____________________.

The ____________________ is a four-port valve that has a slide mechanism in it.

When a heat pump is added to an electric furnace, the indoor coil must be located after the ____________________ strips.

The coil of the air-to-air heat pump system that is the indoor unit is known as the ____________________ in the heating mode.

Some heat pump systems when not capable of meeting the heating needs of the structure are equipped with second-stage heat, called ____________________.

It is common for the outdoor unit to ice-up when the heat pump is operated in the cooling mode.

The coil of the air-to-air heat pump system that is the indoor unit is known as the ____________________ in the cooling mode.

The term ____________________ indicates the source of heat while the system is operating in the heating mode and the medium that is ultimately being treated.

In the emergency heat mode, the auxiliary heat source becomes the primary heat source because of heat pump failure.

In heat pump systems the sensing bulb is typically exposed to high temperatures and could rupture the valve diaphragm. For this reason, a(n) ____________________ TVX is usually used.