Icm Controls 325HNC-LF Head Pressure Control 18-30 Vac

Product DescriptionThe ICM Controls 325HNC-LF is a head pressure control module designed to regulate condenser fan motor speed in refrigeration and air conditioning systems. It accepts a control input of 18 to 30 VAC at 50/60 Hz with a maximum draw of 1.8 VA, and handles line input voltages from 120 to 480 VAC with a maximum motor current rating of 10 amps and a minimum of 100 mA. The unit includes high-temperature bypass, heat pump override, and adjustable hard-start timing with a configurable motor cutout speed. Colored indicator lights display whether the motor is receiving full or modulated voltage, giving technicians a fast visual status check during commissioning and service.This control is suited for residential and light commercial HVAC and refrigeration applications where maintaining adequate head pressure during low ambient temperature conditions is required. It is typically installed in rooftop units, split-system condensers, and refrigeration equipment where condenser fan speed must be modulated to prevent low head pressure faults. Certain model variants require a separate 24 VAC source, while others include a built-in 24 VAC transformer, making the control adaptable to a range of existing electrical configurations on the job site.Key FeaturesHigh-temperature bypass prevents nuisance shutdowns during peak load conditionsHeat pump override maintains proper system operation in heating modeAdjustable hard-start timing and motor cutout speed for site-specific tuningModulation range of 70 to 100 degrees F for ambient-based fan speed controlColored indicator lights show full or modulated motor voltage status at a glanceWide line input range of 120 to 480 VAC accommodates single- and three-phase applicationsCompatibilityDesigned as an OEM-style replacement head pressure control for condenser fan speed applications in commercial refrigeration and air conditioning equipment. Some variant models require a separate 24 VAC control source; others include an integrated 24 VAC transformer verify the electrical configuration of the existing installation before ordering.Installation NotesInstallation should be performed by a licensed HVAC or refrigeration technician familiar with low-voltage control wiring and line-voltage motor circuits. Disconnect and lock out all power to the unit before removing the existing control or making any wiring connections. Confirm the available control voltage matches the 18 to 30 VAC requirement and verify whether the installation requires a separate 24 VAC transformer or uses a variant with a built-in transformer. Follow applicable NEC guidelines for control wiring and motor circuit protection.Technical SpecificationsControl Voltage: 18-30 VACFrequency: 50/60 HzControl Power Draw: 1.8 VA maxLine Input Voltage: 120-480 VACMaximum Current: 10 ampsMinimum Current: 100 mAModulation Range: 70-100 degrees FStandard InformationBrand: ICM ControlsManufacturer Part Number: 325HNC-LF