4.3 Installation of axial fans
4.3.1 Fans design A, D, K, S and W (without nozzles)
For attachment to
fi
xed motor
fl
ange use screws with property class 8.8 or A2-70
(stainless steel) to EN ISO 4014 and provide with suitable screw locking.
Permissible tightening torques M
A
Thread size
M6
M8
Property class 8.8, friction coefcient
µ
ges = 0.12
9.5 Nm
23 Nm
Stainless steel A2-70, friction coefcient
µ
ges =
0.12
7 Nm
17 Nm
Screw penetration
≥
1.5 x d
≥
1.5 x d
When using screws with different friction values or strength classes, different tightening
torques may be necessary.
4.3.2 ZAplus fans
ZAplus fans Type ZN
: When mounting ZAplus, ensure plastic-compliant connectors.
If
fl
at washers as per EN ISO 7089 or DIN125 are used for fastening, a permissible
torque for Strength class 8.8 and a frictional value
μ
tot = 0.12 of M8 = 12 Nm / M10 =
24 Nm / M12 = 40 Nm is recommended.
Since the concrete bolt or screw varies by customer unit, these recommendations must
be checked for each respective situation.
Tighten the grate connector with 6 Nm torque.
Secure the cable covering against loss after connecting the motor by securing with 2
cable ties.
For a version with a square rear wall (design Q), removal of this square plastic plate is
prohibited.
4.4 Mounting of centrifugal fans
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 different friction values or strength classes, different tightening
torques may be necessary.
Quick Start Guide
ECblue
Mounting
L-BAL-F055-GB 1634 Index 004
Part.-No. 00700561-GB
10/23
