Nidec LEROY-SOMER LSHT Instalación Y Mantenimiento página 7

- Auto-ventilated motors (IC411) may be located outside the air flow.
- On motors with a direct cable output, check the power supply cables for damage.
- When the motors are fitted with accessories: thermal protections (CTP, etc.), space
heaters, speed control unit (GI, DT), they must be made inactive when running in the
smoke extraction mode. A system ensuring this disconnection is performed in automatic
must be planned (as per the 12103-3 standard)
- In speed variation, check that maximum speed will never exceed the speed of motors supplied
by mains.
MAINTENANCE REQUIREMENTS
1- 'DUAL PURPOSE'
The motor elements must be inspected regularly, at the following intervals:
1.1 - Every 12 months:
- check of insulation resistance (R > 10 MΩ) under 500V in direct current); if R < 10 MΩ, stove
the stator and check insulation resistance or change the stator if the fault subsists.
- open the drain holes to remove any condensate build-up, then plug them to guarantee the
protection rating indicated on the motor nameplate.
- check the lack of dust and fat in the cooling circuit (eliminate all obstacles to proper motor
cooling).
- check the condition of the power supply cables.
- check the fastening of any accessories.
- check the condition of the lip seals.
1.2 - For motors fitted with bearings with grease nipples, top up grease if required as
indicated on the nameplate (grade, quantity of grease and interval), or grease every 2 years.
Change the bearings every 3 years.
1.3- After 40000 hours operation or 10 years installation, changing the complete motor is
highly recommended.
- At each disassembly, change the gaskets at the shaft passages, bearing connections (for
IP56/65/66), cover and body of the terminal box, cable gland holder or cable glands, by new
gaskets of identical nature after cleaning the parts. Grease the gaskets at the shaft passages.
2 - Use in smoke extraction only:
- It is recommended to run the motors in the horizontal position for at least 1 hour every month
and 15 minutes every 15 days for motors in the vertical position.
- For maintenance refer to the requirements described in paragraphs 1.1 to 1.3.
ONCE RUN IN SMOKE EXTRACTION, THE MOTORS MUST BE REPLACED.
For all other European languages, refer to our Leroy-Somer web site.
SPECIFIC RECOMMENDATIONS
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