Maintenance/repair
en
Installation and operating instructions Wilo-Atmos TERA-SCH
39
Designation
Size
SCH 400-550
6313 ZZ C3
Table 16:
Ball bearings
9.6.6
Check of mechanical seal
Ensure that the sliding face does not present any scratches or abnormal wear. Verify
that the driving collar is well screwed on the shaft at the right place. Check that no ma-
terials block the spring action.
9.7
Installation
Installation must be carried out based on the detailed drawings in the chapter “Dis-
mantling”.
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Clean and check the single components for wear before installation. Damaged or
worn parts must be replaced with original spare parts.
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Coat location points with graphite or something similar before installation.
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Check the O-rings for damage and replace if necessary.
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Flat gaskets must be constantly replaced.
DANGER
Risk of fatal injury due to electrical current!
Improper conduct when carrying out electrical work can lead to death due to electric
shock!
• Any work on electrical devices may only be carried out by a qualified electrician.
• Before all work on the unit, deactivate the power supply and guard against acci-
dental switch-on.
• Any damage to the pump connection cable should only ever be rectified by a
qualified electrician.
• Observe the installation and operating instructions for the pump, motor and
other accessories.
• Reinstall any uninstalled safety devices, such as terminal box covers, once the
work is complete.
NOTICE
Never bring sealing elements (O-rings) made of EP rubber into contact
with mineral oil-based lubricants.
Contact with mineral oil-based lubricants result in swelling or decomposition. The
O-ring must be fitted using water or alcohol only!
9.7.1
Reassembly of rotating element
Gland pack version
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Place the impeller key (14) at its seat on the shaft (24).
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Slide the impeller (21) at its position on the shaft (24), matching the marked position
done while disassembly.
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Place the wear rings (25) on the impeller (21).
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Slide sleeve (34) on both sides of the impeller over the shaft.
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Insert O-ring (35) in between shaft (22) and sleeve (34) and ensure its proper posi-
tioning.
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Screw in the sleeve nut (36) but do not tighten it now, keep it loose.
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Slide in logging ring (39).
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Place gland covers (37); followed by water thrower (6) on both sides.
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Slide the bearing inner covers (5, 30) on either side of the shaft (24).
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Place supporting rings (4).
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Place the bearings (3) at the shaft ends using proper mounting aid.
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Press the bearing housings (2, 33) over the bearings (3) using a mallet.
Mechanical seal version with sleeves
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Place the impeller key (14) at its seat on the shaft (24).
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Slide the impeller (21) at its position on the shaft (24), matching the marked position
done while disassembly.
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Place the wear rings (25) on the impeller (21).
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Slide sleeve (34) on both sides of the impeller over the shaft.
