VEX280

Technical data

VEX280

Air handling unit data
Min. airflow	2,500 m³/h
Max. airflow	18,370 m³/h
Power consumption	17.6 kW
Electrical Supply	3 x 400 V + N + PE ∼ 50 Hz
Max. phase current	30.5 A (Power consumption is not sine shaped)

Weight of operational air handling unit	1,102 kg
Weight of air handling unit for transport	Fan sections: 2 x 236 kg, Rotor section: 221 kg
Ambient temperature (operating) At temperatures below -25˚C (with outdoor installation), use of a thermostatically controlled heater in automated control box is recommended.	-30°C to +50°C

Rotor pinion - stepper motor:
Voltage	230 V
Phase current	0.2 A
Power consumption	45 W
Overcurrent protection	Built in
Control (built in rotation monitor)	Infinitely variable from 0 to 10 rpm on the rotor

Motor and motor control (MC) data
Motor type	EC motor
Motor class in accordance with IEC TS 60034-30-2	IE5 (Ultra Premium Efficiency)
Voltage input	3 x 400 V
Current overload protection	Built-in
Regulation	Variable via motor control (MC)
Control signal with control system	Modbus
Control signal with third party control system	0 - 10 V DC
Fluid temperature (air)	-40°C....+40°C

Data according to Ecodesign Directive

Fan data
Max. total efficiency (A-D)	60.4 %
ECO measurement set-up (A-D)	A
Efficiency level requirements	62N (2015)
ECO efficiency level during optimal operating point	66.6N
Motor data (optimal operating point)
EC motor	With motor controller
Power consumption	4,619 kW
Airflow	7,186 m³/h
Total pressure	1396 Pa
RPM during optimal operating point	2913

Conditions:
- Density = 1.2 kg/m³
- Pressure ratio < 1.11
- other points in acc. with EC327/2011 (see product instructions)

Temperature efficiency

VEX280

Standard rotor

RD13866

Highly efficient rotor

RD13865

Calculation

The temperature efficiency of the VEX units is shown at different airflow ratios, calculated as:

t_2,1	=	Temperature of outdoor air (fresh air)
t_2,2	=	Temperature of supply air
t_1,1	=	Temperature of extract air

Extract air = 25 ºC
Outdoor air (fresh air) = 5 ºC

Temperature efficiency is stated in compliance with EN308 for dry heat recovery and is increased by condensation.

Dimensional sketches

VEX280

Fan location 1 (air handling unit measurements in mm)

RD12167DE_VEX280_V1_FP_dimension

Fan location 2 (air handling unit measurements in mm)

RD12201DE_VEX280_V2_FP_dimension

1.1 Extract air

1.2 Exhaust air

2.1 Outdoor air

2.2 Supply air

1) Allow a min. of 1000 mm service distance in front of the unit
2) Allow a min. of 200 mm free height for service.
*The base height is factory-adjusted to 200 mm. The height can be adjusted between 150–240 mm.

Cooling and heating coils

The following cooling and heating coils are suitable for VEX280

Type	Model
HE electric heating coil	HCE280
HW water heating coil	HW060x140
CW cooling coil (water)	CW060x140I CW100x160U
DX cooling/heating coil	DX060x140S DX060x140L