• Tap doan Rosenberg
  • Box fans
  • Dong Co EC
  • Slide 01

ERAE

ERAE... / ERAD... - Centrifugal fans single inlet with forward curved centrifugal impellers


·    Casing made of galvanized sheet steel
·    outgoing connection cable
·    motor protection by termal contacts
·    speed is variable using auto transformers

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Description:

The high efficiency centrifugal fans with backward curved impellers have been developed especially for modern  ventilation and air conditioning applications and are ideal for the movement of air and slightly aggressive gas and vapours. The sizes comply with standard R20 according to DIN 323. The designation of sizes corresponds to the outside diameter of the impeller.


Application areas:
Railway  / Wind power /  Ex-protection /   Datacenters /   Inflatables /   Compressors /  Ships /  Offshore /  Laboratories / Retail stores / Industrial buildings / Basement rooms / Workshops

Reference to Directives:
 Declaration of incorporation and operating instruction are according to Machinery Directive 2006/42/EC, CE identification in accordance to EMC-Directive 2014/30/EU, Low Voltage Directive 2014/35/EU and the Ecodesign-Directive 2009/125/EC.
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Casing:

The casing of the high efficiency centrifugal fans is made of galvanized sheet steel.  The  side parts of the scroll are assembled with the spirally shaped guide plate through a standing seam. The side parts are produced with holes to fix the mounting brackets, which can be fixed in steps of 90°.

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Impellers:

The impellers are balanced together with the external rotor motors at two levels according to quality level G2.5 to DIN 1940.

Forward curved centrifugal impellers in single inlet variant made of galvanized sheet steel.

_____________________________________________________________________________________________________

Motor and motor protection:

All Rosenberg fans are equipped with direct driven external rotor motors. All our fans have motor protection through thermal contacts in the motor windings as standard. The motors apply to protection class IP44/IP54.

The drive has due to an external rotor motor a space saving, compact and attractive design. The motor is  fitted within the impeller,  which  enables the best possible cooling. For this reason a 100% variable speed  control can be guaranteed. V-belts, additional tension bars and motor mounting devices are not necessary.  Only  well-dimensions  ball-bearings,  fitted  on  both sides and life time greased are used.
Both  ball-bearing  seats  are  ground to high precision in one work process to eliminate any vibrations.
External rotor motors have extremely low starting current. The windings comply to isolation class F.
In addition the windings have a standard moisture impregnation.

_____________________________________________________________________________________________________

Electrical connection:

The motors are fitted with an outgoing cable. The electrical connection can be made via an IP44 terminal box, which is supplied loose.

_____________________________________________________________________________________________________

Installation:

Direction of rotation:
Direction of rotation for the fan types ERAE and ERAD is clockwise viewed from the inlet side.

_____________________________________________________________________________________________________

Air volume control:
For more information see accessories!

5-speed control:
230V  à RTE
400V  à RTD

Infinitely variable control:
230V  à not possible
400V  à    RED

_____________________________________________________________________________________________________

Scope of delivery:

  Centrifugal fan (ERAE / ERAD)
  Terminal box (loose)
  Documentation

_____________________________________________________________________________________________________

Important notes:

Air performance curves:

The performance curves for these fan types have been measured in mounting position B (installed on the pressure side and open on the suction side) and show the total pressure increase ∆pt as a function of the air flow.  The dynamic pressure ∆pd2 refers to the flange cross section at the outlet side of the fan.

Noise levels:
The  bordered  values  printed  in the performance curve diagrams show the "A" weigthed LWA6 sound power level (fan outlet). Determination of "A" weigthed LWA5 sound power level at fan inlet:

LWA5 [dB(A)] = LWA6 [dB(A)] - 6 dB

The "A" weighted sound pressure level LPA at a distance of 1 metre is calculated approximately by  deducting 7 db(A) from the "A" weighted sound power level. It is importmant to note that the reflection and room characteristic as well as natural  frequencies  influence  the sound pressure levels a different way.  The octave sound power level LWA at octave medium frequency you can find on the table on each fan type page.

Classification of the fan series:
NRVU    = Non Residential Ventilation Units
UVU    = Unidirectional Ventilation Units

Erp-Information:
Rosenberg fans have a spezfic (pressure-) ratio < 1,05 (pressure < 5000 Pa).

Service life:
For maximum service life of Rosenberg products please beware of the maintenance hints on the manual for each product type.

Recycling and disposal:
For recycling and disposal of Rosenberg products comply with applicable locally requirements and regulations.

For further information, please click the model below for detail.

ERAE 180-2 ERAE 224-4 B ERAE 250-4 K ERAE 280-4 K ERAE 315-6 K
ERAE 180-2.4FF IE ERAE 225-4 K ERAE 250-4 K.5FA ERAE 280-4 ERAE 315-6
ERAE 180-4 B ERAE 225-4 ERAE 250-4 ERAE 280-4.6FA IE  
ERAE 200-4 B ERAE 225-6 ERAE 250-6 ERAE 280-6 K  
ERAE 200-4     ERAE 280-6  

 

ERAE... / ERAD... - Centrifugal fans single inlet with slippage characteristics


·    Casing made of galvanized sheet steel
·    Steep volume-pressure-performance curve outgoing connection cable
·    motor protection by termal contacts
·    speed is variable using auto transformers

_____________________________________________________________________________________________________

Description:

By use of a special designed external rotor motor with high rotor resistance, in connection with forward curved centrifugal impellers,  we  developed  a  centrifugal  fan series with extremely high slippage characteristics. The external rotor motor adjusts  to  the  operating  conditions  and  therefore changes the R.P.M. at varying system resistances regarding on the total  pressure.  This  is  a  special  advantage in systems with variable resistances occurred from dirty filters,  controlled dampers in duct installations or clean-room applications.


Application areas:
Railway  / Wind power /  Ex-protection /   Datacenters /   Inflatables /   Compressors /  Ships /  Offshore /  Laboratories / Retail stores / Industrial buildings / Basement rooms / Workshops

Reference to Directives:
 Declaration of incorporation and operating instruction are according to Machinery Directive 2006/42/EC, CE identification in accordance to EMC-Directive 2014/30/EU, Low Voltage Directive 2014/35/EU and the Ecodesign-Directive 2009/125/EC.
_____________________________________________________________________________________________________

Casing:

The spiral scrolls are made of galvanized sheet steel.
On request plastic coating is possible.

_____________________________________________________________________________________________________

Impellers:

The impellers are balanced together with the external rotor motors at two levels according to quality level G2.5 to DIN 1940.

Forward curved centrifugal impellers in single inlet variant made of galvanized sheet steel.

_____________________________________________________________________________________________________

Motor and motor protection:

All Rosenberg fans are equipped with direct driven external rotor motors. All our fans have motor protection through thermal contacts in the motor windings as standard. The motors apply to protection class IP44/IP54.


The drive has due to an external rotor motor a space saving, compact and attractive design. The motor is  fitted within the impeller,  which  enables the best possible cooling. For this reason a 100% variable speed  control can be guaranteed. V-belts, additional tension bars and motor mounting devices are not necessary.  Only  well-dimensions  ball-bearings,  fitted  on  both sides and life time greased are used.
Both  ball-bearing  seats  are  ground to high precision in one work process to eliminate any vibrations.
External rotor motors have extremely low starting current. The windings comply to isolation class F.
In addition the windings have a standard moisture impregnation.

_____________________________________________________________________________________________________

Electrical connection:

The motors are fitted with an outgoing cable. The electrical connection can be made via an IP44 terminal box, which is supplied loose.

_____________________________________________________________________________________________________

Installation:

Direction of rotation:
Direction of rotation for the fan types ERAE and ERAD is clockwise viewed from the inlet side.

_____________________________________________________________________________________________________

Air volume control:
For more information see accessories!

5-speed control:
230V  à  RTE
400V  à  RTD

Infinitely variable control:
230V  à  not possible
400V  à  RED

_____________________________________________________________________________________________________

Scope of delivery:

  Centrifugal fan (ERAE / ERAD)
  Terminal box (loose)
  Documentation

_____________________________________________________________________________________________________

Important notes:

Air performance curves:

The performance curves for these fan types have been measured in mounting position B (installed on the pressure side and open on the suction side) and show the total pressure increase ∆pt as a function of the air flow.  The dynamic pressure ∆pd2 refers to the flange cross section at the outlet side of the fan.

Noise levels:
The  bordered  values  printed  in the performance curve diagrams show the "A" weigthed LWA6 sound power level (fan outlet). Determination of "A" weigthed LWA5 sound power level at fan inlet:

LWA5 [dB(A)] = LWA6 [dB(A)] - 6 dB

The "A" weighted sound pressure level LPA at a distance of 1 metre is calculated approximately by  deducting 7 db(A) from the "A" weighted sound power level. It is importmant to note that the reflection and room characteristic as well as natural  frequencies  influence  the sound pressure levels a different way.  The octave sound power level LWA at octave medium frequency you can find on the table on each fan type page.

Classification of the fan series:
NRVU    = Non Residential Ventilation Units
UVU    = Unidirectional Ventilation Units

Erp-Information:
Rosenberg fans have a spezfic (pressure-) ratio < 1,05 (pressure < 5000 Pa).

Service life:
For maximum service life of Rosenberg products please beware of the maintenance hints on the manual for each product type.

Recycling and disposal:
For recycling and disposal of Rosenberg products comply with applicable locally requirements and regulations.

For further information, please click the model below for detail.

ERAE 279-4 ERAE 316-4
ERAE 281-4 ERAE 356-4
ERAE 314-4 ERAE 399-4.6LA

Centrifugal fans single inlet with slippage characteristics and with forward curved impellers Single inlet

Single inlet casings, made from galvanized steel, with spiral scroll. Impellers with forward curved blades made from galvanized steel, mounted onto the rotor of a speed controllable external rotor motor. The fan is balanced on two levels according to quality class G 2.5, DIN/ISO 1940.

Closed motor, protection class IP 44/54 with protection against humidity and thermal contacts for motor protection. Maintenance free ball bearings, closed on both sides, sealed for life. Electrical connection through terminal box (not connected) in IP 44.

Reference to Directives:
Declaration of incorporation and operating instruction are according to Machinery Directive 2006/42/EC, CE identification in accordance to EMC-Directive 2014/30/EU, Low Voltage Directive 2014/35/EU and the Ecodesign-Directive 2009/125/EC.

Picture of Centrifugal fans with forward curved impellers Single inlet

 

Picture of Centrifugal fans with slippage characteristics Single inlet

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