AHU RetrofitRosenberg EC Fans

the perfect way of cutting energy wastage of your AHU fan

Dynalink International Technology Ltd. www.di-technology.com I contact: Eddie Fung eddiewcfung@di-technology.com I tel: 3955 0204

Made in Germany

• Rosenberg energy saving EC-motors are developed and manufactured exclusively on their modern production line at their headquarters

in Künzelsau.

• Through the combination of know-how and innovative manufacturing technology, they attain a quality that meets the highest standards.

Tested precision

• State-of-the-art company laboratories with sophisticated measuring systems

• Electrical, fluidic and circuitry related properties of fans and air handling units can be measured and analyzed.

• Testing chambers are regularly inspected and certified by TÜV Süd according to DIN EN ISO 5801 to assure the

reliability and accuracy of the testing equipment and hereby confirms the precision and performance data of our

products

Why Rosenberg?

Overview of the advantages• high efficiency factor

• low energy consumption

• integrated monitoring function (motor temperature, locked rotor and many more)

• easy installation and connection (Plug & Play)

• expanded functionality (pressure control and many more)

• compact construction

Energy Efficiency• Modern Ectechnology achieve efficiency ratings over 90% and save up to 50% energy versus

traditional motor technology.

• In comparison to EC 60034-30, Rosenberg EC-motors have an efficiency rating greater than IE4.

• The lower energy consumption is not only good for the environment, but lowers the operating

costs for users.

Advantages of EC technology

Energy-related Products Directive (ErP)• The European Union mandates the minimum energy efficiency requirements for energy

using products with the Energy-related Products Directive 2009/125/EG (ErP).

• Rosenberg EC-fans are 100% compliant and fall below all maximum permissible values

Amortization

• the investment is usually amortized within a short

operating time due to lower energy consumption

and greater ease of installation (no transformer

controller, motor overload switch, thermocouple

meter, VFD, or phase angle controller are

necessary).

Expanded Functionality

• maintenance free and low running noise.

• integrated and intelligent electronics take care of control,

communication and monitoring functions.

• steplessly variable speed settings are possible as well as

the creation of pressure, air flow and air quality parameters.

• parameters essential to the proper operation, i.e. voltage or

temperature, are monitored automatically.

• meet the highest standards in regards to energy efficiency,

cost effectiveness and high air quality.

The Rosenberg EC-Motor

• an inverter-fed synchronous motor with permanent magnets in external rotor

construction.

• the motor position is dependent upon voltage supplied via an inverter module

(similar to the principle of a frequency inverter).

• the EC commutation electronics are different from a frequency inverter in that

they decide how the motor phases in the stator are supplied with current

(commutation) depending on position, rotation direction and default.

• permanent magnets in the rotor produce a magnetic field which is required for

full load production. A high efficiency, low noise, and continuous motor speed

control is possible with this.

• an assembly flange on the rotor is used for impeller assembly.

• depending on the motor type, a terminal box is available with cable screw

connections or connection cable for easy and quick connection.

• further control functions (e.g. constant pressure control, volume flow control,

temperature control, air quality control) can be adopted

Functional principle

Fans with EC-drivesRosenberg EC-fans are utilized everywhere where economical energy usage and simple control are

required based on the actual ventilation needs. The integrated electronics sets the EC-fan for optimal

operation every time. All that is needed is a control signal.

Open Loopthe speed of the fan can be steplessly adjusted through a 0-10 V or 4-20 mA set point input.

Closed Loopthe EC-fan compares the nominal value with the measured actual value and adjusts the speed

accordingly to the set requirements. The measured values could be pressure, air flow volume,

temperature, CO2,

Bus operationthe EC-fan can be integrated into a bus system through an RS-485 interface.

ECParamWith the free Rosenberg software ECParam, changes to settings of the EC-fan can be made using a

USB-to-RS485 adapter. Current operating conditions can also be read-out (Changing the operating

mode, setting a specific minimum or maximum speed, and much more)

AHU Retrofitby The ECFanGrid System

The Benefits of the ECFanGrid system

• comfortable transportation through existing standard doors, stairways, or elevators with two persons

• easily controllable through the related wiring cabinet

• redundancy by system and a clever, continuous concept for the best possible availability of the AHU

• flexibility in design and optimal usage of thee existing space, extensions possible

• floor-free installation results in a comfortable cleaning to meet the highest hygienic standards

• ease of maintenance and straight forward replacement within minutes.

A Two-People-Job

Best practices (1)Improving the heat transfer efficiency and capacity of heat exchanger and cooler

Best practices (2)Reduce the maintenance costs of belt driven centrifugal fan

Best practices (3)Improving the energy efficiency and correct the over-design of equipment

AHU Retrofit – Project example

AHU Retrofit – Project example

AHU Retrofit – Project example