ACU

Air handling Heat pump Air conditioning

The ACU range is an efficient, economical and environmentally friendly solution specially designed for cooling and heating aircraft under construction, for ground maintenance or stopover. It covers the needs of all aircraft, with the aim of replacing the operation of the APU (Auxiliary Power Unit).

The ACU/PCA (Aircraft Air Conditioning Unit) cools the aircraft’s avionics bay and keeps users comfortable, reducing your energy bill and your carbon footprint.

These air handling units are installed in a fixed version on the ground or as a mobile version, that can betowed on a trailer (25 km/h).

Performance (according to EN 14511 standard)

Cooling capacity range: 27-172kW

Description

The ACU is designed to provide precise regulation for optimum, continuous energy performance.

The ACU range uses R513A refrigerant. This choice is best suited to the requirements of the aeronautical and airport sectors.

Its main advantages are:

  • A low Global Warming Potential (GWP) of 631 which puts it below the threshold of 750 imposed by the European F-GAS III 2024 regulation.
  • A non-flammable fluid with little or no toxic effect: R513A is classified A1 group L1. A coherent choice to combine carbon impact reduction and safety for our applications in the specific environment of an airport runway.
  • Performance adapted to airport conditions: its application range ensures optimal performance even when outside temperatures are at their highest (operation up to 50°C or even 60°C outside).

Manufactured using an all-aluminium structure (frame and casing) for particularly effective corrosion resistance, this air conditioning and heating system comes with a 20-year anti-corrosion guarantee (frame- casing).

This heat pump is delivered ready to operate. A separate technical compartment facilitates unit control and maintenance by allowing measurement and adjustment during operation.

The ACU is designed to provide precise regulation, adapting the rotational speeds of the power stages, for optimum, continuous energy performance throughout its years of operation.

It comes with a 2-year basic warranty and all services ETT: Commissioning, Audits, Service contracts etc.

Products top benefits

  • Temperature / flow / pressure performance
  • Maintain supply temperature at 02°C without defrosting
  • Wide range of flow rates and power ratings
  • Fixed and mobile version

Product options

Frame – Casing

  • Motorised external supply air damper

Air handling

  • ISO Coarse 65% (G4) refillable 98mm filters + ISO ePM1 80% (F9)

Acoustics

STOPFLAM foam sound insulation for the technical compartment

Compressor soundproofing covers

Auxiliaries

  • 3-stage sequential electric heater with triac
  • 2-row hot water coil with analogue frost protection thermostat (please consult us)
  • Modulating 3-way hot water valve, fitted (please consult us)
  • Shut-off valve + TA control valve (please consult us)
  • Vinyl coating on thermodynamic coils

Electrics

  • Electricity meter and totaliser
  • Aluminium/copper terminal blocks (mandatory for aluminium power cables)
  • Soft starter (compressor start-up current reducer)
  • 230 V/16 A single-phase PC socket in technical room (separate power supply to be provided by installer)

Installation

  • Aluminium feet (height: 100 mm)
  •  Trailer

Control

  • Relative humidity sensor (anti-condensation function on supply air by analysing outside specific humidity)

Communication

  • myETTvision
  • ETT Control Box remote touch display
  • CCAD remote display
  • Modbus RS485
  • Modbus IP
  • BacNet IP

Duct accessory options

Aircraft connection principle

Adaptation of the pressure/airflow combination to suit the aircraft type

The ACU supply temperature is maintained at 02°C or 08°C depending on the type of unit.

Duct details:

Détail de la gaine

Description of accessories

ITEMSFeaturesDetails
  • Coupling (loc.n 1), developed by ETT
  • Aluminium AG3 with 4 quick-connect fitting - groove coupling for a quick disconnection
  • Available in diameters from 7.9" to 15"1/2
  • Coupling (Loc.n # 2) developed by ETT
  • Aluminium AG3 with 4 quick-connect fitting - cam coupling for a quick disconnection
  • Available in diameters from 7.9" to 15"1/2
  • Starter unit (loc.n # 3) provided by ETT
  • Yellow PVC polyester fabric
  • 5 mm polyester wadding
  • Yellow PVC polyester fabric
  •  Weight of insulation 288 g/m2
  •  Thermal conductivity 0.004 W/m.K
  •  Pressure Drop 43Pa/ml
  • Available in diameters from 7.9" to 15"1/2  
  • Flat duct Section 7.5 m (loc.n # 4) provided by ETT 
  • Yellow PVC polyester fabric
  •  5 mm polyester wadding
  •  Yellow PVC polyester fabric
  •  Weight of insulation:
  •  1.88 kg/m for 11.8" mm diameter
  • 2.51kg/m for 15"1/2 diameter
  • Thermal conductivity 0.004 W/m.K
  • Pressure Drop 43 Pa/ml
  • Available in diameters from 7.9" to 15"1/2 in sections of 4 meters, 6 meters, and 7.5 meters 
  • Tapered adapter - ETT duct (PCA) (Loc.n # 5) provided by ETT

     

  • Tapered adapter
  •  Yellow PVC polyester fabric
  •  5mm polyester wadding
  •  Yellow PVC polyester fabric
  •  Weight of insulation 288 g/m2
  •  Thermal conductivity 0.004 W/m.K
  • Pressure Drop 43 Pa/ml
  • Available in diameters from 7.9" to 15"1/2
  • Aircraft connector (loc.n # 6) provided by ETT
  • 360° PCA two-part construction with protective grille Ø 7.9’’
  • Material: hard ABS plastic
  • Weight: 4kg
  • D. 7.9’’
  • Hose reel trolley provided by ETT
  • Material: powder-coated painted steel, Safety yellow
  •  Dimensions: 1,100(L) x 930 (W) x 1,100 (H)
  •  Weight: 86 kg empty for 25 lm of duct
  •  Weight: 120 kg empty for 50 lm of duct
  •  Safety bumpers
  •  Wheel locking system
  • Capacity: 25 linear metres of hose. Available in 48 lm capacity