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DUO

Dual Air Cooler

Capacity Ranges from 8 - 67 kW

"The ceiling mounted Dual Discharge Coolers "

"The DUO air coolers have been designed to cover a wide range of positive applications (0°C to +12°C) :

  • Positive temperature refrigerated warehouses, requiring important air throw.
  • Preparation and processing rooms.
  • Laboratories requiring low air movement and comfortable sound level (6P - 8P version).
  • Cold rooms, platforms, temperature controlled air locks... (4P - 6P version)."

CASING

Assembling of white prepainted galvanized steel panels, giving a good corrosion protection, the casing is especially designed for easy access for maintenance and cleaning :

  • Intermediate drip tray limiting condensation under the main drain pan.
  • Swivel doors and drain pans providing an easy access to the different components of the heat exchanger (coil, connections, defrost heaters, expansion valves, ...).
  • Single water drainage Ø 2"".
  • Fan motors mounted on hinges.

COILS

  • Finned coils with copper tubes and aluminium fins especially designed for evaporation process, providing an increased heat transfer coefficient."
  • Standard fin spacing : 6.3mm.
  • Factory mounted diaphragm liquid distributors with a DP of 2 to 2.5 bars.
  • As a standard the coolers are optimised for R404A/R507.
  • Please consult us for other refrigerants.
  • Schrader valve fitted on the suction header enabling to measure the evaporating pressure and to check the running.
  • parameters of the cooler (direct expansion). Delivered under dry air pressure (direct expansion).".

VENTILATION MOTORS

  • Axial fans with two speed motor, “star / delta” type :
    DUO60 - Ø 650mm
    6PH / 6PL
    8PH / 8PL
    Motors : factory wired.
  • Temperature range : -30°C and +45°C.
  • Voltage :
    - 3 phase supply 400V(+7%/-10%)/~3/50Hz for PH and PL models.
    - 3 phase supply 230V(+7%/-10%)/~3/50Hz for PL models.
  • Protection IP55 (CEI 34-5). Drain-hole and shaft seal with nylon gaskets.
  • Class F (CEI 85 and CEI 34-1).
  • Maximum frequency of starting : 20 starts per hour
  • (consult installation and operation manual)."

PROPELLERS

The fans enable a significant sound reduction, while keeping high airflow performances. This is the result of :
  • a balanced distribution of the air load on the fan blades.
  • an optimisation of the angles of incidence avoiding fan turbulence at the suction.
  • an optimised fan profile allowing a low drag coefficient.
  • a dynamic balancing of the fan in two plans"
  • Electric defrost of the drain pan
  • Coil protection
  • - vinyl.
    - blygold.
    - heresite.
  • Thermostatic expansion valve.
  • Special fin pitch 4,5 to 10mm.
  • Double insulated drain pan.
  • Fan motors mounted on hinges.

DEFROST (optional)

  • Low heating intensity stainless steel elements inserted in copper cover inside the coil.
  • Connected to weatherproof connection box.
  • Factory wired to 400V-3PH-50Hz.MOTOR OPTIONS
  • Motor supply voltage:
  • 230V/~3/50Hz.
    400V/~3/60Hz.
    230V/~1/50Hz.
  • Emergency switch.
  • Two-speed wiring.
  • Motor switch.
  • Frequency speed control motors.

Product Catalog

CASING

Assembling of white prepainted galvanized steel panels, giving a good corrosion protection, the casing is especially designed for easy access for maintenance and cleaning :

  • Intermediate drip tray limiting condensation under the main drain pan.
  • Swivel doors and drain pans providing an easy access to the different components of the heat exchanger (coil, connections, defrost heaters, expansion valves, ...).
  • Single water drainage Ø 2"".
  • Fan motors mounted on hinges.

COILS

  • Finned coils with copper tubes and aluminium fins especially designed for evaporation process, providing an increased heat transfer coefficient."
  • Standard fin spacing : 6.3mm.
  • Factory mounted diaphragm liquid distributors with a DP of 2 to 2.5 bars.
  • As a standard the coolers are optimised for R404A/R507.
  • Please consult us for other refrigerants.
  • Schrader valve fitted on the suction header enabling to measure the evaporating pressure and to check the running.
  • parameters of the cooler (direct expansion). Delivered under dry air pressure (direct expansion).".

VENTILATION MOTORS

  • Axial fans with two speed motor, “star / delta” type :
    DUO60 - Ø 650mm
    6PH / 6PL
    8PH / 8PL
    Motors : factory wired.
  • Temperature range : -30°C and +45°C.
  • Voltage :
    - 3 phase supply 400V(+7%/-10%)/~3/50Hz for PH and PL models.
    - 3 phase supply 230V(+7%/-10%)/~3/50Hz for PL models.
  • Protection IP55 (CEI 34-5). Drain-hole and shaft seal with nylon gaskets.
  • Class F (CEI 85 and CEI 34-1).
  • Maximum frequency of starting : 20 starts per hour
  • (consult installation and operation manual)."

PROPELLERS

The fans enable a significant sound reduction, while keeping high airflow performances. This is the result of :
  • a balanced distribution of the air load on the fan blades.
  • an optimisation of the angles of incidence avoiding fan turbulence at the suction.
  • an optimised fan profile allowing a low drag coefficient.
  • a dynamic balancing of the fan in two plans"
  • Electric defrost of the drain pan
  • Coil protection
  • - vinyl.
    - blygold.
    - heresite.
  • Thermostatic expansion valve.
  • Special fin pitch 4,5 to 10mm.
  • Double insulated drain pan.
  • Fan motors mounted on hinges.

DEFROST (optional)

  • Low heating intensity stainless steel elements inserted in copper cover inside the coil.
  • Connected to weatherproof connection box.
  • Factory wired to 400V-3PH-50Hz.MOTOR OPTIONS
  • Motor supply voltage:
  • 230V/~3/50Hz.
    400V/~3/60Hz.
    230V/~1/50Hz.
  • Emergency switch.
  • Two-speed wiring.
  • Motor switch.
  • Frequency speed control motors.