Io Hvac Controls MD-2212-BM Zone Damper 22x12 in Bottom Mount

Product Description

The IO HVAC CONTROLS MD-2212-BM is a rectangular two-position zone damper sized at 22 inches wide by 12 inches tall, fitted with a Belimo three-wire actuator mounted on the bottom of the frame. Two-position zone dampers open and close on a 24-volt control signal, directing conditioned airflow to individual zones in a ducted HVAC system. The Belimo actuator provides reliable, low-voltage operation and snaps to the damper frame without additional adapters. This unit weighs 11 pounds and ships as a fully assembled damper-and-actuator package, reducing field assembly time. Licensed HVAC technicians are the primary installers for this type of component.

This damper is designed for residential and light commercial zoning applications where ductwork requires individual zone control. It fits into rectangular duct runs of 22 inches by 12 inches and is well suited for multi-zone forced-air systems using a compatible zone control board. The bottom-mount actuator configuration is useful in installations where side or top clearance is limited. The three-wire Belimo actuator interfaces with standard 24-volt zone control panels, thermostats, and zone boards used in split-system and air handler installations.

Key Features

• Rectangular 22 x 12 inch frame sized for direct duct installation
• Two-position operation opens and closes on a 24-volt control signal
• Belimo three-wire actuator included and factory-mounted
• Bottom-mount actuator position accommodates tight overhead or side clearances
• Fully assembled unit reduces field labor at install

Compatibility

Designed as an OEM-style replacement or new-installation zone damper for rectangular duct systems requiring a 22-inch by 12-inch two-position damper with a Belimo three-wire actuator interface.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with applicable mechanical codes. Shut down the air handler and de-energize the zone control panel before wiring or mounting the damper. Secure the damper frame to the duct using sheet metal screws and seal all edges with approved duct sealant or foil tape to prevent air bypass. Verify low-voltage wiring connections to the zone board match the actuator wire sequence specified by the actuator manufacturer before restoring power.