Speed Control Wiring Diagram

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Speed control wiring diagram. Although it seems to do a job similar to a dimmer and actually looks very similar the fan speed switch is more like a regular light switch and will be wired in series with the fan. The setting of p1 determines the phase of the trigger pulse that fires the triac. Standard ac with variable speed air handler and two stage heat control wiring 7 this diagram is to be used as reference for the low voltage control wiring of your heating and ac system. This triac based 220v ac motor speed controller circuit is designed for controlling the speed of small household motors like drill machines.
Always refer to your thermostat or equipment installation guides to verify proper wiring. The speed of the motor can be controlled by changing the setting of p1. This is actually a fairly simply switch that is mounted on the wall. Inst maint wiring qxd 5 03 2008 10 02 am page 7 m 8 installation maintenance wiring diagrams.