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Fig. 17: Adjusting screw A for axial safeguard
B
B
Fig. 18: Fastening screws B of coupling halves
6.7.2
Alignment of the pump unit
Installation and operating instructions • Wilo-Atmos GIGA-NHT • Ed.01/2023-10
•
Connect the coupling halves once correctly aligned.
The tightening torques for the coupling are listed in the table "Tightening torques for ad-
justing screws and coupling halves".
•
Install the coupling guard.
Coupling parameter d [mm]
80, 88, 95, 103
110, 118
125, 135
140, 152
160, 172
180, 194
200, 218
225, 245
250, 272
280, 305
315, 340
350, 380
400, 430
440, 472
Table 7: Tightening torques for adjusting screws and coupling halves
Any deviations in the measuring results indicate a misalignment. In this case, the unit must
be realigned to the motor.
•
Loosen the hexagon head screws and counter nuts on the motor.
•
Place shims under the motor feet until the height difference is compensated.
•
Pay attention to the axial alignment of the coupling.
•
Tighten the hexagon head screws again.
•
Finally, check the functioning of the coupling and shaft. The coupling and shaft must be
easy to turn by hand.
•
After correct alignment, mount the coupling guard.
For tightening torques for the pump and motor on the baseplate, see "Screw tightening
torques for pump and motor" table.
Screw:
M6
Tightening torque
10
[Nm]
Table 8: Screw tightening torques for pump and motor
CAUTION
Risk of damage due to vibrations! Incorrect alignment can lead
to vibrations.
Vibrations can damage or destroy individual components.
• Carefully align the pump unit until all measurement results are within
the permissible range.
Tightening torque for ad-
justing screw A [Nm]
4
4
8
8
15
25
25
25
70
70
70
130
130
230
M8
M10
M12
25
35
60
en
Tightening torque for ad-
justing screw B [Nm]
13
14
17.5
29
35
44
67.5
86
145
185
200
260
340
410
M16
M20
M24
100
170
350
23
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