Radial Fan With Free Wheel Impeller - Stulz LINEA MODULAR DX 181 Manual Tecnico

Radial fan with free wheel impeller

Description
The radial fan with free wheel is an optional alternative to the belt-driven standard fan. This
option exists only for downflow units.
The high efficiency impeller with single side intake and backward curved blades is made
of saltwater-proof aluminium and fixed on a outside rotor motor. A flow-optimized intake
nozzle made of galvanized steel is installed at the suction side.
The sealed motor with protection class IP44 is protected against humidity by impregnation
and is equipped with thermal contacts against overheating. The ball bearings are
maintenance-free and canned on both sides with a long term lubrication.
Capacity control
For the capacity control exist three possibilities, among them one proportional control
with a frequency converter and two ways of on/off-control:
1. Frequency converter
2. Transformer
3. None
Maintenance
The radial fan with free wheel is maintenance-free.
Technical Data
Unit A,G,GE
Number
Airflow
Ext. pressure
Nom. capacity
Power consumption
(A,G / GE)
Unit CW
Number
Airflow
Ext. pressure
Nom. capacity
Power consumption
S/0701/10/156
- proportional
- number of steps dependent of the wiring mode
- on/off
MRD 181 MRD 261
1
m³/h 5000
Pa 70
kW 1.8
kW 1/1.1
MRD 281 MRD 331
1
m³/h 5500
Pa 70
kW 2.3
kW 0.9
MRD 331
1 1
7500 9000
70 70
2.3 3.1
1.8/2.0 2.1/2.3
MRD 441
1 1
9000 12000
70 70
3.1 4.0
2.1 2.9
MRD 381 MRD 461
1 2
12000 14000
70 70
4.0 4.6
3.3/3.5 3.4/3.6
MRD 631
2
14000
70
4.6
3.4