Wr Wall Ring Axial Erm

• Motors available in single phase only, with class ‘B’
  insulation, which are fully speed controllable.
• Suitable for low airflow and pressure systems.
• Ideal for installation in walls for ventilation
  purpose.
• Available in sizes 200 mm to 300 mm.
   

*Note some sizes are not sickle blade typeFAN DIAMETER
200-630mm

FAN DIAMETER

200-630mm

DUTY

up to 5200l/s

PRESSURE

up to 200 Pa

ERM AXIAL

Features of all Models

• Ziehl or ebm impeller / motor assembly.
  Factory assembled and balanced.
  Power units designed for optimum efficiency.
  Fully speed controllable external rotor motor.
  Sealed for life ball bearings.
  High efficiency, low noise axial and/or
  sickle blade fixed pitch axial impeller.
  Perfectly matched to medium / low pressure
  and volume systems.
• Powder coated galvanised steel construction.
  Attractive low profile with high durability and
  longevity.
• Robust galvanised impeller support.
  Minimised installation and maintenance costs.
• Finger guards fitted as standard.
  Most fans available in SC versions.

Specifications

Housing

The housing of these units are of galvanised steel, with a square plate or single flanged (ring plate) arrangement incorporating the bell mount inlet and finger guard as standard. All models have a powder coated finish.

Impellers

Ziehl or ebm axial impellers are manufactured from pressure cast aluminium for low rotational mass. The
rotor / impeller assembly is to be balanced as a complete assembly to ISO1940 grade G6.3 or better.

Motors

Motors are to be manufactured by Ziehl or ebm and to be of external rotor design. Motor enclosure to feature IP54/IP44 (for exe) protection. Motor winding are to incorporate class ‘B’ or ‘F’ insulation. Motor bearings are of maintenance free ball bearing design. Auto-reset thermal contacts are provided in the large units. These are either fitted with 3 pin plug and lead or terminated at wiring connection bar.

Testing

Rated fan performance has been determined by testing to DIN24163 1998.
Fan sound data has been determined by testing to DIN 45635.

Wiring Diagrams

It is the responsibility of the user to connect the thermal contacts where provided in a manner to protect the
motor. Failure to do so will void the warranty on the motor.