Howden 24-07.030r04 8/25
E-series Axial Flow Cooling Fans
III. INSTALLATION
Required Tools
Torque wrench (check tightening torques
for the correct model)
Socket and wrench
Inclinometer
Straight edge:
Minimum length > blade width
Rotation and flow direction
Standard rotation is clockwise when viewed
into the air-stream. See figure 5.
Figure 5
Preparation
Clean all mating surfaces between shaft, ta-
pered bushing (if applicable) and fan hub. All
corrosion preventive coatings should be re-
moved.
Check the following before parts shall be as-
sembled:
Drainage hole at the blade tip and blade
shoulder shall be open
Make sure the drive shaft is properly cen-
tred with respect to the fan casing. Also
check if the shaft is vertical within the pre-
scribed tolerance.
Check the concentricity of the driver shaft
end before mounting the impeller. The im-
peller should not be mounted if the con-
centricity error exceeds 0.02 mm (0.0008”)
see figure 6.
Figure 6
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