Glossary of Terms IX

Question 1

Detent Action

Answer 1

A device that is added to a control contacts that allow the contacts to snap open or closed quickly instead of slowly. (Also referred to as snap action)

Question 2

Differential

Answer 2

Difference between the cut-in and cut-out

Question 3

Heat Anticipator

Answer 3

Adjustable resistor heating element that is wired in series to operate when the system is on to allow the thermostat to turn the system off sooner to prevent overshoot caused by lag

Question 4

Low Voltage thermostat

Answer 4

Typical 24 volt thermostat used for air conditioning and heating applications

Question 5

Mercury bulb

Answer 5

Glass bulb containing a small amount of mercury and electrical contacts to make or break an electrical circuit

Question 6

Override

Answer 6

The programmed settings bypass of a programmable thermostat

Question 7

Overshoot

Answer 7

Conditioned space temperature that is higher than desired due to system lag

Question 8

Programmable Thermostat

Answer 8

Electronic thermostat designed to provide a series of desired temperature conditions at different times of day

Question 9

Range

Answer 9

The operating limits of a switch or control door

Question 10

Setback

Answer 10

Lowering of the temperature set point for the conservation of heating energy for nighttime or unoccupied periods