Wilo Atmos TERA-SCH Instrucciones De Instalación Y Funcionamiento página 26

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Fig. 23: Checking the radial alignment with a
comparator
Fig. 24: Checking the radial alignment with a
ruler
6.7.2 Alignment of the pump unit
26
Installation and electrical connection
Checking the radial alignment
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Firmly clamp a dial gauge to one of the couplings or to the shaft. The piston of the
dial gauge must lie against the crown of the other half-coupling.
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Set the dial gauge to zero.
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Turn the coupling and write down the measuring result after every quarter turn.
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Alternatively, the radial coupling alignment can also be checked with a ruler.
NOTICE
The radial deviation of the two coupling halves must not exceed the maximum val-
ues found in table "Maximum permissible shaft displacement ΔS
This requirement applies to every operating status – including operating temper-
ature and inlet pressure.
Any deviations in the measuring results indicate a misalignment. In this case, the unit
must be realigned to the motor.
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Loosen the hexagon head screws and the counter nuts on the motor.
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Place shims under the motor feet until the height difference is compensated.
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Pay attention to the axial alignment of the coupling.
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Tighten the hexagon head screws again.
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Finally, check the function of the coupling and shaft. The coupling and shaft must be
easy to turn by hand.
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After correct alignment, mount the coupling guard.
The tightening torques for the pump and motor on the base frame are listed in the table
"Tightening torques for pump and motor".
Screw: M6
Tightening torque 10
[Nm]
Table 11: Tightening torques for pump and motor
M8 M10 M12
25 35 60
and ΔKr ".
perm. perm.
M16 M20 M24
100 170 350
WILO SE 2020-10