Io Hvac Controls MD-2220-BM Rectangular Zone Damper 22x20 in

Product Description

The IO HVAC CONTROLS MD-2220-BM is a rectangular 2-position zone damper sized at 22 inches wide by 20 inches tall, designed for zoned HVAC duct systems in residential and light commercial applications. The unit ships with a Belimo 3-wire actuator mounted at the bottom of the frame, providing reliable open/close control through a standard 24-volt zone control board or thermostat system. At 16 pounds, the assembly is robust enough for permanent duct installation. The 2-position operation makes it a straightforward drop-in solution for systems requiring discrete zone isolation rather than modulating airflow control.

This damper is suited for rectangular duct runs where zone separation is required, such as multi-zone forced-air heating and cooling systems. The bottom-mount actuator orientation accommodates installations where side or top access is restricted. HVAC technicians typically deploy this damper inline with supply or return ductwork as part of a zoned comfort system. It is appropriate for new construction and retrofit zoning projects where a Belimo 3-wire actuator interface is specified or already present in the controls wiring scheme.

Key Features

• 22 inches by 20 inches rectangular duct opening for standard commercial and residential duct sizes
• 2-position operation provides simple open/close zone control without modulating components
• Includes Belimo 3-wire actuator for compatibility with standard 24-volt zone control wiring
• Bottom-mount actuator configuration suits restricted-access installation environments
• Packaged dimensions of 26 inches wide by 28 inches tall by 8 inches deep for shipping and storage planning
• 16-pound assembly weight suitable for typical duct suspension hardware

Compatibility

Designed as an OEM-style replacement or new-install zone damper for rectangular duct HVAC zoning systems that use a Belimo 3-wire actuator interface with 24-volt zone control boards.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with local mechanical codes and the equipment manufacturer guidelines. Power down the air handler and de-energize the zone control panel before wiring the actuator. Secure the damper body to the ductwork using sheet metal screws and approved duct sealant to prevent air bypass. Verify actuator travel and end-switch operation before returning the system to service.