The ACU-804 Series comprises a line of self-contained, fully portable air conditioning and heating units designed to service single-connection narrow- and medium-body aircraft worldwide. With 65 nominal tons of refrigeration capacity, the unit is engineered to achieve and maintain comfortable cabin temperatures in a wide range of climates and operating conditions

The ACU-804 uses TLD Direct Drive technology, with a diesel engine directly powering the refrigeration compressor and centrifugal blower. Its rugged construction, automatic capacity control and high-capacity airflow provide dependable performance for demanding airport and FBO ground-support operations.
General:
• Suitable for single-connection narrow- and medium-body aircraft
• 65 nominal tons of refrigeration capacity
• Airflow of up to 375 lb/min / 170 kg/min
• Supplied cooling air temperature of approximately 35–50°F / 2–10°C under rated conditions
• Optional heating capacity of 350,000 BTU/hr / 103 kW
• Heating air outlet temperature of approximately 90–130°F / 38–54°C
• Self-contained and fully portable trailer-mounted design
• High-capacity centrifugal blower delivers the airflow and pressure required by modern aircraft
• Adjustable outlet damper allows single-handed control of airflow and pressure
• Simplified operator controls consistent with other TLD ground-support equipment
• 24-volt electrical control system
• Heavy-duty fuel tank sized for at least eight hours of continuous operation

Direct Drive System:
• Diesel engine directly drives the refrigeration compressor and blower
• Frick XJS-120S variable-capacity rotary screw compressor
• Automatic pressure-controlled capacity adjustment matches cooling output to aircraft demand
• Compressor designed for up to 50,000 operating hours before major service
• Hydraulically driven roof-mounted condenser fan directs heat upward
• Design helps minimize the effects of changing wind conditions, ramp heat and surrounding noise

Engine and Environmental Features:
• Available with Deutz or Cummins heavy-duty diesel engines
• Engine configurations available for Tier 3, COM IIIA and Tier 4 / COM IV requirements
• R-134a refrigerant with zero ozone-depletion potential
• R-134a system maintains operating efficiency in extremely hot ambient conditions
• Optional low-fuel warning and shutdown systems
• Optional engine block heater, warm-up timer and cool-down timer