Complete AHU control cabinet with color touchscreen and ventilation controls

Cleanroom Control and Environmental Monitoring Systems

AHU Control System

A dedicated AHU automation package for fan pressure, temperature, humidity, dampers, heating and cooling coils, filters and protective operating sequences.

Supply-Air Condition Control
Fan and VFD Sequencing
Filter Pressure Monitoring
Coil and Damper Protection

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Product Introduction

The AHU control panel combines a local controller, motor interfaces, analog inputs and protective circuits around the air-handler sequence. Supply-air temperature and humidity loops coordinate cooling, heating and humidification, while fan speed responds to duct pressure or airflow demand. Differential-pressure inputs indicate filter loading and airflow proof contacts confirm safe operation before conditioning stages are enabled. Freeze, smoke, high-temperature and fan-failure interlocks move the unit to predefined safe states.

Key Features

Coordinated heating, cooling and humidity loops reduce opposing control actions.

VFD speed control maintains supply static pressure as terminal airflow demand changes.

Filter differential pressure and fan proof signals provide early maintenance indicators.

Hardwired and programmed interlocks protect coils, heaters and downstream cleanroom zones.

Customer Product Concerns

Cleanroom air handlers must maintain stable supply conditions while responding safely to changing airflow demand and equipment faults.

Cooling and reheat operate against each other and waste energy.Sequenced control assigns clear priority and deadbands between conditioning stages.

A loaded filter reduces room airflow before maintenance notices.Dedicated differential-pressure trends and alarm thresholds reveal increasing filter resistance.

Fan speed changes cause unstable supply-duct pressure.A tuned pressure loop modulates the VFD within defined minimum and maximum limits.

A freeze or smoke input leaves dampers and coils in an unsafe state.Interlock logic commands fans, dampers and valves to a predetermined protective sequence.

Typical Applications

Pharmaceutical makeup-air unitsCleanroom recirculation AHUsLaboratory supply systemsHumidity-controlled production areas

Technical Parameters

Typical physical construction for a cleanroom AHU control cabinet is listed below.

Core Material	Powder-coated steel cabinet with FR-4 controller boards, copper distribution and flame-retardant terminal ducts
Panel Thickness	300-600 mm cabinet depth
Effective Width	800-1600 mm cabinet width
Maximum Length	Up to 2200 mm cabinet height
Steel Facing Thickness	1.5-2.0 mm powder-coated steel enclosure
Core Density	7800-8050 kg/m³ for steel structural parts
Thermal Conductivity	45-60 W/(m·K) for steel enclosure panels
Surface Finish	Light-gray powder coat with blue, green and red control indicators
Joint Type	Floor-standing segmented cabinet with isolated motor, controller and field-terminal sections
Customization	Available based on the intended application and operating environment.

Available Options

Dual-fan lead-lag controlHumidifier interfaceHeat-recovery sequenceLocal touchscreen HMI

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