4.6 Mounting of centrifugal fans
4.6.1 Mounting of centrifugal fans design RE, RH, RZ
For attachment to
fi
xed motor
fl
ange use screws with property class 8.8 to EN ISO 4014
and provide with suitable screw locking.
Permissible tightening torques M
A
Thread size
M6
Property class 8.8, friction coefcient
µ
ges = 0.12
9.5 Nm
Screw penetration
≥
1.5 x d
When using screws with di
ff
erent friction values or strength classes, di
ff
erent tightening
torques may be necessary.
Mounting of centrifugal fans, RZ design
Attachment to motor fan wheel mounting according to device manufacturer's speci
fi
ca-
tions.
Information
•
Pay attention to a su
ffi
cient screw-in length in the motor
fl
ange.
•
An excess screw length of max. 3 mm is permissible.
•
Every screwing case is di
ff
erent. The tightening torque adapted to it must be
determined by the appropriate screw tests.
•
In the case of a vertical motor axis, the respective lower drain hole must be open.
Ensure that the clearance (gap)
“
a
”
see
fi
g. be-
tween the fan impeller and the stationary
housing section is constant. Distortion due to un-
even surface may lead to fan failure.
Attention!
•
Avoid structural damage or stress with installation. Flange and mounting bracket must
be
fi
xed
fl
at on a level surface.
•
The fan must be securely mounted, with vibration dampers if necessary.
4.6.2 Mounting of centrifugal fans design RG.. / RD..
Fastening depending on housing design on
fl
ange or fastening brackets.
Information
An additional bracket is required for fastening to the
fl
ange. This is available as an
accessory.
Assembly instructions
ECblue
Mounting
L-BAL-F056-GB 2022/45 Index 005
Part.-No. 00700562-GB
15/44