Audel HVAC Fundamentals, Volume 2

Audel HVAC Fundamentals, Volume 2

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Heating System Components, Gas and Oil Burners, and Automatic Controls James E. Brumbaugh. The 24-volt switching relay illustrated by the wiring diagram in Figure 6-34 is designed to control 115-volt and 24-volt or ... A terminal board is located on top of the relay cover with screw terminals for connecting a thermostat (terminals T1 and T2) and a gas valve or oil burner control (terminals X1 and X2).

Title:Audel HVAC Fundamentals, Volume 2
Author:James E. Brumbaugh
Publisher:John Wiley & Sons - 2004-11-08


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