AAON OE377-26-00059 MHGRV-X Controller System

AAON's MHGRV-X Controller (OE377-26-00059; AAON part number V12100) is a modular control module that modulates a Modulating Hot Gas Reheat Valve to maintain a specified supply-air temperature and dehumidification setpoint in commercial HVAC applications. It can operate as a standalone controller or be integrated with AAON's VCB-X or VCCX2 controllers, exchanging signals over an E-BUS via a modular expansion cable and the host controller's expansion port. Key capabilities include second-stage reheat when two hot gas reheat valves are used, reheat solenoid valve control, and coil flushing to promote refrigerant oil return. The MHGRV-X features a 2×8 LCD display housed in a plastic enclosure, mounting via three base holes, and is designed for mounting in environments free from extreme temperatures or moisture. Electrical power input is 18–30 VAC with a maximum power draw of 18 VA; operating temperature range is -30°F to 150°F and 0–95% relative humidity (non-condensing). Weight is about 1 lb. In stand-alone or integrated configurations, it communicates essential controls such as reheat enable, supply-air temperature setpoint, and reset commands between the MHGRV-X and the host controller, enabling coordinated dehumidification performance in AAON packaged units or systems that use the MODGAS-X family.