Honeywell 220736A Internal Auxiliary Switch

The Honeywell 220736A is a precision-engineered Internal Auxiliary Switch designed for integration within Honeywell Modutrol IV motors. This single-pole, double-throw (SPDT) switch provides critical feedback loops and auxiliary control for HVAC damper actuators and valve linkages. Functionally identical to the 220736A/U, this component allows contractors to trigger external equipment such as fans, pumps, or pilot lights based on the motor's shaft position. Built for industrial-grade durability, it handles high-duty cycles common in commercial combustion systems and air handling units. Installation requires direct mounting inside the motor housing, ensuring a compact footprint without compromising terminal accessibility. When calibrating damper motor accessories, this switch provides reliable mechanical switching points that remain stable under thermal load. For technicians maintaining Honeywell burner controls, the 220736A is the standard specification for adding simplified end-switch functionality to existing drive motors.

• Direct Compatibility: Precision-fit for all Modutrol IV Series 61, 62, 71, 72, and 90 motors.
• SPDT Logic: Enables flexible normally-open or normally-closed wiring configurations for auxiliary switch kits.
• Field Adjustable: Cam-operated mechanism allows for precise switching point settings across the motor's stroke.
• Robust Ratings: Engineered to withstand the electrical inrush of HVAC motor controllers and signaling circuits.

Common Service Questions

How do I synchronize the 220736A with the motor shaft position?
The switch is adjusted by rotating the internal cam once the motor is powered to the desired trigger point. Ensure the Honeywell actuator switch clicks at the exact degree of rotation required for your sequence of operation.

Can I use the 220736A in place of a 220736A/U?
Yes, these model numbers represent the same technical specification. The 'U' suffix typically denotes universal packaging for wholesale distribution, but the electrical and mechanical properties are identical.

Is this switch rated for line voltage applications?
Yes, the auxiliary end switch is designed to handle standard line voltage for controlling secondary loads, though you should always verify the specific amperage draw against the motor’s nameplate ratings.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.