All rights reserved. Printed in the United States of America. Page 4 a word that matches the picture (Listening Comprehension standard score = 84) and generate words within a category, describe scenes, and give directions (Oral Expression standard score = 83).
The power is supplied by a transformer, and when the thermostat makes contact between the 24 volt power and one or two of the other wires, a relay back at the heating/cooling unit activates the corresponding heat/fan/cool function of the unit(s).
This conventional device uses a number of different principles to measure the intensity of heat in the surroundings and give a relatively precise reading. However, some people mistakenly think that a thermostat is also a device for measuring temperature, just like a thermometer.