4.2
Erecting the equipment Design ER
Use screws, for example, of strength class 8.8 according to DIN EN ISO 4014 to fasten the fan.
"
Secure the screws with a suitable screw lock.
"
Tighten the fastenings with the speci
fi
ed torques (
Table).
"
After an operating time of approx. 1 hr. re-check the torque of the screwed connection with the
necessary MA.
Permissible tightening torques M
A
Thread size
M6
M8
M10
Property class 8.8, friction coefcient
µ
ges = 0.12
9.5 Nm
23 Nm
40 Nm
Ensure that the clearance (gap)
“
a
”
see
fi
g. between
the fan impeller and the stationary housing section is
constant. Distortion due to uneven surface may lead to
fan failure.
Information
•
Every screwing case is different. If the strength class of the screws differs from strength class 8.8,
you must determine the adapted tightening torque by appropriate screw tests.
•
Structure-borne noise decoupling of the complete centrifugal fan is recommended to avoid
transmission of disturbing vibrations. (Spring or damping elements are not usually parts of the
standard scope of supply). The assignment of the spacing dimensions of the damping elements can
be taken from the catalogues on our home page under www.ziehl-abegg.de in the section
Download - Ventilation and Control Engineering.
•
Erect in the open air only if this is expressly mentioned and con
fi
rmed in the ordering information.
There is a risk of damage to the bearings if the fan remains stopped in a moist environment. Avoid
corrosion by suitable protective measures. Roo
fi
ng is required.
•
Corrosion is possible at the cutting edges on sendzimir galvanised parts.
Attention!
•
Connect all contact points securely to the foundation or plant. If not fastened suf
fi
ciently, there is a
risk of the fan tipping over or coming loose - danger of injury!
•
The screwed connection that connects the impeller to the hub may never be loosened for any work
on the fan! The impeller and hub form a commonly balanced assembly which may only be
disassembled and installed as a complete unit. Merely loosening this screwed connection can lead
to imbalance and therefore to vibrations even if the screws are connected again correctly before
recommissioning!
•
Blocking or braking the fan by, say, pushing objects into it is forbidden. This leads to heated
surfaces and damage to the impeller.
•
Making your own alterations/conversions on the fan module is unacceptable - safety risk!
•
Please note the following for all types of centrifugal fans:
–
Avoid structural damage or stress with installation. Make sure the surface is
fl
at and even.
–
Add-on parts (depending on the design:
fl
anges, fastening brackets, frames, rails, support plates,
etc.) must lie
fl
at on the contact surfaces.
–
Do not use force, do not lever, do not bend.
–
Do not bend fan roller or fan wheel and blades - imbalance!
–
Important: Deformations and misalignments must not result in the striking or grinding of rotating
parts!
Assembly instructions
PMblue
Mounting
L-BAL-F073-GB 2033 Index 003
Part.-No. 00703805-GB
11/22
