Wilo T 17 E3 Series User Manual

en Appendix
98 WILO SE 2019-10
14 Appendix
14.1 Tightening torques
Rust-free screws A2/A4
Threaded Tightening torque
Nm kp m ft·lb
M5
5.5 0.56 4
M6
7.5 0.76 5.5
M8
18.5 1.89 13.5
M10
37 3.77 27.5
M12
57 5.81 42
M16
135 13.77 100
M20
230 23.45 170
M24
285 29.06 210
M27
415 42.31 306
M30
565 57.61 417
Geomet-coated screws (strength 10.9) with Nord-Lock washer
Threaded Tightening torque
Nm kp m ft·lb
M5
9.2 0.94 6.8
M6
15 1.53 11
M8
36.8 3.75 27.1
M10
73.6 7.51 54.3
M12
126.5 12.90 93.3
M16
155 15.81 114.3
M20
265 27.02 195.5
14.2 Frequency converter operation
The motor in series design (confirming to IEC60034‑17) can be operated with a fre-
quency converter. Contact customer service if the rated voltage is over 415V/50Hz or
480V/60Hz. As a result of the additional heating caused by harmonics, the rated power
of the motor must be around 10% more than the power requirement of the pump. For
frequency converters with a low-harmonic output, it may be possible to reduce the
10% power reserve. Harmonic waves are reduced by means of output filters. The fre-
quency converter and filter must be compatible.
The configuration of the frequency converter depends on the rated motor current.
Make sure that the pump operates without jerking or vibration, specifically in the lower
speed range. Otherwise, the mechanical seals may leak or be damaged. The flow rate in
the pipe must also be observed. A low flow rate increases the risk of solids depositing in
the pump and piping. A minimum flow rate of 0.7m/s (2.3ft/s) with a pumping pressure
of 0.4bar (6psi) is recommended.
It is important that the pump operates across the entire control range without vibra-
tions, resonance, oscillation or excessive noise. Increased motor noise caused by the
harmonics of the power supply is normal.
During parameter configuration of the frequency converter, observe the setting of the
quadratic characteristic curve (U/f curve) for pumps and fans! The U/f characteristic
curve ensures that the output voltage at frequencies below the rated frequency (50Hz
or 60Hz) is adjusted to the power requirement of the pump. More recent frequency
converters feature an automatic power optimisation function – this automation
achieves the same effect. For the frequency converter setting, refer to its installation
and operating instructions.
Motor monitoring faults may occur in motors operated with a frequency converter de-
pending on the type used and the installation conditions. The following measures can
help to reduce or avoid these faults:
ƒ Keeping within the limit values stated in IEC60034‑25 for overvoltage and rise
speed. Output filters may need to be installed.

Wilo T 17 E3 Series Specifications

General

Brand	Wilo
Model	T 17 E3 Series
Category	Engine
Language	English