GEA CAIRfricostar - Aspectenvironmental.com

GEA CAIRfricostar
Alternative fan unit:
Dehumidifier with Air Mixing Function
Type CWR
GEA „OPTIVENT“ high performance fan impellers
– Surface coated one side suction with backward curved blades that are directly connected
to motor shaft; performance optimized three-phase motor, B3 model type,
protection type IP55, insulation class F adjusted for operation with a frequency converter.
Fan and motor unit including coated intake nozzle mounted on buckling
resistant and coated base construction, motor and fan have sound attenuated bearings
– Continuous measurement of pressure effects
– Statically and dynamically balanced according to DIN ISO 1940, part 1, G2,5). Continuous
pressure monitoring using DDC. Frequency converter for each motor
installed in or mounted on the unit, control via GEA DDC with a separate analogue
signal for each motor. Frequency converters are adjusted and set for both motors.
Limit values for motor current and fan speed are set by the programme
– Resonance frequency band/fade out set by factory
– automatic energy optimization for optimal energy use and efficiency rate
– Multiple motor operation is possible
– Voltage intermediate circuit converter without reduction of capacity
– continuous speed control
– Operating hours counter
– Min. and max. speed limitation, automatic ramp curve function UP/DOWN
– Automatic motor adjustment
– Motor tracing switch
– DC break
– Variable clock frequency
– Motor protection
– Short circuit and short circuit to earth safe
– Under and overcurrent protection
– Phase fault monitoring
– Motor coils for reducing speed of voltage rise du/dt (delta voltage/delta time)
– Numerical display for queries and entering of different indicators on operating status:
control setpoint, motor frequency, actual value and setpoint, motor current,
motor torque and capacity, intermediate circuit voltage, thermal motor load, thermal
frequency converter load, control and programmable display with copy function,
production according to ISO 9001, CE Label, net and main shaft protection according
to VDE 0160, radio interference shielding, codes and regulations on electromagnetic
compatibility conform with EN 55011 Kl.B-1; EN 50082-2, electric
insulation of control and power components according to VDE 0106/0160 (The use
of earth leakage circuit breaker / fuse with frequency converters NOT possible!),
volume flow measuring device via ring measuring line and pressure measuring
point in fan. Calculation and evaluation of volume flow via the GEA DDC. The settings
for entire unit are done at the factory. Continuous safety monitoring via safety
chain in the unit. Display and settings via GEA DDC.
Air mixing dehumidifier CWR
Air damper system: – Dampers with sealing lips, leakage volume flow 20 m3/h m2 (dp=100 Pa), for circulating
air/bypass, for fresh and exhaust air. Circulating and fresh air rate 0-100%
– Coated Almg3 damper blades with flow efficient profile, operate in opposite
directions. Driven by double sided, anti-static plastic gears PA6 as fiberglass
reinforced model (resistant to chemicals) including special actuator for
each damper
– Control of the individual actuators using continuous DDC signals
Filter for fresh and
exhaust air:
– Filter units conform with VDI 6022
– Including bag filter as of DIN/EN 779, synthetic fiber filter medium
– All filters are fitted with a differential pressure switch for filter monitoring via the DDC
PR-2008-0327-GB • Subject to modifications • Status 05/2009 31