HVAC Heat Pump Test 2 (Week 6)

When Auxiliary Heat is used by itself or in the case of Heat Pump Failure, it is known as:

• Additional Heat

• Supplemental Heat

• Accessory Heat

• Emergency Heat

Outdoor thermostats are used to stage the heat strips at different outdoor temperatures and are wired in series with the control voltage of the electric strips.

• True

• False

Tags

NGSS.MS-PS3-3

The control most often used to stage the electric heat strips is the:

• Defrost Relay

• Automatic Switch

• Blower Motor Relay

• Sequencer

When referring to a Heat Pump Thermostat, “Y” will energize:

• Only when there is a call for the Indoor Blower in the Fan On position

• Only when there is a call for cooling in the Cool Mode

• When there is a call for cooling in the Cool Mode or when there is a call for heat in the Heat Mode

• Only when there is a call for heat in the Heat Mode

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

When referring to a Heat Pump Thermostat, “O” will energize:

• a. Reversing Valve in the Cooling Mode

• b. Reversing Valve in the Heating Mode

• c. Indoor Blower

• d. Compressor Contactor

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

NGSS.MS-PS1-4

The thermostat should always be mounted at least 52" inces above the floor near the main return on an outside wall.

• True

• False

What safety control is designed to open or "break" the control voltage to the compressor contactor when there is a problem resulting in an extremely large rise in the refrigerant pressure.

• Fusible Link

• Thermal-Cutout

• Loss of Charge Switch

• High-Pressure Switch

The control most often used to activate the compressor and outdoor fan is the:

• Blower Motor Relay

• Manual Switch

• Defrost Relay

• Contactor

Tags

NGSS.MS-PS3-3

When referring to a Heat Pump Thermostat, “B” will energize:

• Reversing Valve in the Heat Mode

• Emergency Heat

• Compressor Contactor

• Reversing Valve in the Cool Mode

Tags

NGSS.MS-PS3-3

When referring to a Heat Pump Thermostat, “W” or “AUX” will energize:

• .

  Compressor Contactor

• Auxiliary Heat/Electric Heat Strips

• Indoor Blower

• Reversing Valve in the Cooling Mode

Tags

NGSS.MS-PS3-3