CRVB-280 N Ecowatt Plus IP44 roof fan

Cabinet

is designed for vertical air exhaust. The fan base is made of galvanized steel sheet, the brackets, grille and screws are also electroplated. The fan shroud and casing are made of Al sheet metal. The fan motor is mounted in the air stream. Protective grille against contact.

Running wheel

is radial with backward curved blades. It is made of galvanized steel sheet, is statically and dynamically balanced.

Motor

DC, special EC motor with external rotor for 230 V/50 Hz power supply. The motors are equipped with a thermal fuse as standard. Motor insulation is class F. Permanent operating temperature -20 to +40 ˚C. Ball bearings with grease packing for life. Protection rating IP44.

Rotation direction

is only possible in one direction, in the sense of the arrow on the fan housing. The fan control does not allow changing the direction of rotation.

Fan box

with a revision switch is located on the fan housing. The internal terminal block has connection terminals for speed control, sensor controlled control and for setting and reading operating values. The protection rating is IP55.

Speed control

The digital control unit provides 4 basic modes switchable by the Prosys Ecowatt controller. The first mode maintains a constant line pressure based on an integrated sensor. The other modes allow continuous automatic control to constant air flow, proportional mode or ventilation mode with 2 switchable min/max operating characteristics. It is possible to connect signals from external devices (CO₂, temperature and relative humidity sensors), external pressure sensor with transmitter and 0-10 V or 4-20 mA output. The control allows control via Modbus-RTU. The Prosys Ecowatt controller can control up to 32 fans with different settings in one network (controller not included).

Options

CRVB-N Ecowatt Plus - the system is based on the use of modern elements for DCV systems (demand controlled ventilation). These are fans with microprocessor control, built-in differential pressure sensor, EC motor (electronically commutated), electrically controlled exhaust plate valves, CO₂ sensors, relative humidity sensors, programmable time switches for controlling exhaust plate valves.
CRVB-N Ecowatt - A simpler fan design with EC motor, the fan does not include a constant pressure or flow control module. The fan is controlled by a 0-10 V control voltage only.

Noise

The noise emitted by the fan is shown in the tables. The values are measured at a distance of 4 m on the discharge side in the horizontal direction.

Caution

Consult 602 679 469 for permitted combinations of electrical accessories.

Commissioning

Expert installation and commissioning assistance is available for this product.