Rev. 1 - 05/10/2021
OPERATING MANUAL
OPERATING MANUAL
EN
EN
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7. PRODUCT DESCRIPTION
The RDP is a backward curved blade fan equipped by an external permanent magnet rotor motor. The rotor
magnets are made by rare earths (NdFeB) that strongly reduce the motor dimension and, therefore, the fan
obstruction. The motor shape itself has been chosen for increasing the airflow inside the fan scroll.
The Driver is compact and it is directly installed on board of the fan. The single-phase models are equipped with an
active PFC (Power Factor > 0.95 in any state of operation) and it drives the motor through a sensorless algorithm.
The Fans of the RDP series combine high energy efficiency and low noise level. Thanks to the “EC” (electronic
commutation) motors, their electronics integrate speed control and protecting system. This reduces the number
of different components required to provide these functions, compared to fans with traditional motors.
The main feature of EC-motor is operating without slip losses, which allow consuming significantly less power than
conventional AC motors.
This occurs at all speed levels, especially with partial load operation. The EC complete drive system (i.e. the
combination of the permanent-magnet motor with its electronic driver) has a much higher energy efficiency,
in comparison with a drive system based on a conventional AC motor.
Features
• Supply voltage 220V-240V or 400V -3Ph+/-10% (50/60Hz)
• Sinusoidal Sensorless control
• Integrated active Power Factor
Controller on Single-Phase units
• Simple cable connection with cage
clamps
• Integrated Modbus RTU interface
• Integrated analogue interface 0-10V
• Tachometric output available
Performance
• Internal PID available
• Soft start
• Adjustable limits and operating mode
• Self-protecting strategies implemented
• High efficiency
• NTC bypassed during operation
• PFC disabled at stop
• Power Factor >0.95 on models with A-PFC
Protection
• Missing motor phase protection
• Short circuit protection
• Overload protection
• Overheat protection
• Impeller blocking protection
• Safe Operating Area (speed, power
and current limitation)
REF.
DESCRIPTION
1
Scroll
2
Inlet
3
Outlet
4
Impeller (backward curved blades)
5
EC motor
6
Driver
7
Nameplate
1
2
3
4
5
6
7