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NORA Oilheat Technicians Manual

Chapter 12 Limit Controls/Thermostats Figure 12-32: Schematic diagram for a triple acting controller, Honeywell L8124A Shows how the external connections will often appear in the instruction sheet with the control. Note that the hot line, starting at terminal 1, goes directly to a point midway between the low limit switch and the circulator limit switch. This point is the hot side of a SPDT switch that is actuated by the heat sensing element immersed in the boiler water. Chapter 12—Limit Controls and Thermostats 12-23


NORA Oilheat Technicians Manual
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