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).
Connect a 24 VAC common wire to power the thermostat. 3 Determine if your system has a 24 VAC common wire which is required to power the thermostat. â¢ If your system is a heat pump, skip to step 4. a. If your existing thermostat has a terminal named C, COM, X, or B with a wire connected to it, skip to step 4.b.If your thermostat does not have that terminal, or does not have a wire connected to it, go to step 3a.a. Determine if your system has a 24 VAC common wire which is required to power the thermostat. â¢ If your system is a heat pump, skip to step 4. a. If your existing thermostat has a terminal named C, COM, X, or B with a wire connected to it, skip to step 4.b.