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8.6.1
Draining the cooling water
If you take the machine out of service, drain the cooling water by removing the cooling water
drain plug.
1. Switch off the cooling water supply.
2. Disconnect the cooling water supply from the motor.
3. If necessary, lift the motor to access the cooling water drain plug.
4. For IM B3, open the cooling water drain plug at the lower side of the motor - or opposite to
the terminal box duct.
5. Drain the cooling water into a suitable container or tank.
6. Completely drain the water from the cooling system. Doing this avoids damage due to
corrosion and frost.
7. Blow the cooling system dry using compressed air.
8. Retighten the drain plug.
9. Close and seal the cooling water intake and discharge connections.
Frost and corrosion protection
If you cannot drain the cooling system because standby capability is required at short notice,
then protect the cooling circuit against frost and corrosion damage:
● Mix suitable additives with the cooling water.
NOTICE
Impairment of the heat transport
Additives such as anti-freeze and corrosive inhibitor can impair the heat transport.
● Operate the motor only with the contractually agreed water quality.
● Continue to operate the cooling water circuit. This avoids deposits from forming.
● If anti-condensation heating is available, keep this switched on. This avoids condensation
and condensate forming inside the machine.
8.6.2
Avoidance of damage to roller bearings during stoppages
Extended stoppages at the identical or almost identical resting position of the rotor in the roller
bearings can result in damage, such as brinelling or corrosion.
● During stoppages, regularly start up the machine for a brief period once a month. As a
minimum, turn the rotor several times.
If you have uncoupled the machine from the driven machine and secured the rotor with a
rotor shipping brace, then remove this before turning the rotor over or starting up the
machine.
Make sure that the resting position of the rotor after the rotor has been turned over is
different from its previous position. Use the fitted key or the coupling halves as reference
markers.
● During recommissioning, refer to the information in Chapter "Commissioning".
Operation
8.6 Stoppages
SIMOTICS HV C 1NA14544WA600AG0-Z
68
Operating Instructions 06/2018
Summary of Contents for Simotics HV C 1NA14544WA600AG0-Z
Page 2: ...14 06 2018 09 34 V3 00 ...
Page 10: ...Table of contents SIMOTICS HV C 1NA14544WA600AG0 Z 10 Operating Instructions 06 2018 ...
Page 74: ...Operation 8 9 Faults SIMOTICS HV C 1NA14544WA600AG0 Z 74 Operating Instructions 06 2018 ...
Page 100: ...Service and Support SIMOTICS HV C 1NA14544WA600AG0 Z 100 Operating Instructions 06 2018 ...
Page 104: ...Quality documents SIMOTICS HV C 1NA14544WA600AG0 Z 104 Operating Instructions 06 2018 ...
Page 106: ...Additional documents SIMOTICS HV C 1NA14544WA600AG0 Z 106 Operating Instructions 06 2018 ...
Page 110: ...Index SIMOTICS HV C 1NA14544WA600AG0 Z 110 Operating Instructions 06 2018 ...
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