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Honeywell 220736B Mod IV 2 Switch Auxiliary. The 220736B Switch is a handy device designed for specific Honeywell Modutrol IV motors used in HVAC systems. The Switch is a useful device built for specific Honeywell Modutrol IV motors found in HVAC systems. The Honeywell 220736B connects two single-pole, double-throw SPDT micro switches to your motor, allowing you to control auxiliary equipment based on the motor's position. Consider turning on a fan or damper only when it reaches a specific angle. Adjustable cams inside the motor trigger the switches at the positions you choose, providing exact
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