Io Hvac Controls RM-1208 Rectangular Zone Damper 12x8 in

Product Description

The IO HVAC CONTROLS RM-1208 is a rectangular zone damper designed for use in ducted HVAC zoning systems. It ships with a 35-second Belimo actuator wired in a 3-wire configuration, which allows for both power-open and power-close operation without a return spring. The damper body measures 12 inches wide by 8 inches tall and weighs approximately 5.73 pounds. HVAC technicians use this assembly to divide a forced-air system into independently controlled temperature zones, directing conditioned air only where it is called for. The included Belimo actuator is a widely trusted component in the trade and simplifies field wiring.

This damper is suited for residential and light-commercial ducted zoning applications where rectangular duct runs are used. It installs inline in a rectangular supply or return duct branch and is controlled by a zone control board or panel that sends low-voltage signals to the actuator. The 3-wire actuator is compatible with most zone control systems that support modulating or on-off control with a dedicated open, close, and common terminal. Typical installations involve multi-zone systems using a central air handler or furnace paired with a zone controller and individual thermostats.

Key Features

• 12x8 inch rectangular damper body sized for standard duct openings
• Includes a 35-second Belimo actuator for reliable, controlled blade movement
• 3-wire actuator wiring supports power-open and power-close operation
• Low-voltage actuator control integrates with standard zone control panels
• Compact package dimensions of 10 inches wide by 19 inches tall by 8 inches deep

Compatibility

Designed for use in rectangular duct zoning systems compatible with 3-wire Belimo-style actuator control panels. The RM-1208 designation indicates a 12x8 inch duct opening fitment.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with ducted zoning systems. Power down the air handler and zone control panel before making any wiring connections to the actuator. The actuator's 3-wire harness connects to the zone board's open, close, and common terminals - consult the zone controller documentation for exact terminal assignments. Ensure the damper blade moves freely through its full range of travel and that the duct collar is sealed after mounting to prevent air bypass.