Honeywell 220738A Adapter Bracket

The Honeywell 220738A Adapter Bracket is a critical mounting accessory designed to maintain operational parity when upgrading to modern Modutrol IV motors. This bracket functions specifically to raise the actuator shaft height by 0.75 inches (19 mm), effectively matching the footprint and mechanical alignment of legacy Modutrol models such as the M934, M944, M945, and M975. For HVACR technicians performing field replacements, this component eliminates the need for extensive damper linkage recalibration or onsite modifications to existing mounting hardware.

Forged for industrial durability, the 220738A ensures precise shaft height adjustment for seamless integration with Q607 Auxiliary Switches and various valve linkages, including the Q100, Q601, and Q618 series. By providing the necessary clearance for crank arm rotation through the downward position, it prevents binding and mechanical interference in compact air handler or boiler configurations. This HVAC replacement part is essential for maintaining the torque delivery and stroke accuracy required in high-demand modulation applications.

• Ensures Modutrol IV compatibility with legacy systems by raising the motor shaft 19 mm for exact alignment.
• Mandatory for high-duty valve linkage applications including Q100 and Q601 series installations.
• Provides necessary clearance for crank arm rotation in downward positions, preventing equipment stalling.
• Reduces labor time during retrofits by maintaining original damper linkage geometry.
• Compatible with a wide range of motor models across Series 71, 72, 76, and 90 actuators.

Is this bracket required for all Modutrol IV installations?
It is optional for most standard damper applications but becomes mandatory if the crank arm must rotate through the bottom plane or if you are using specific valve linkages like the Q100.

Will this work with the newer Q5001 valve linkage?
No, the Q5001 linkage is designed with an integrated base and does not require the 220738A adapter bracket for proper shaft alignment.

Can I use this to replace a 220738B bracket?
The 220738A is functionally identical to the standard adapter bracket used across most Modutrol IV replacement motor kits for universal height adjustment.

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.