NOVENCO ARO 290, Руководство по установке и обслуживанию

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12 Novenco
®
jet fan types AUO/ARO - ARP/AUZ - AUT/ART - AZT
E. Checklists
Before installation Inspection and maintenance
Rotor turns freely in fan casing
Inspection of fans
Ground fan to remove static electricity
• Measure power consumption at ½ and full speeds
Clear installation location to ensure free airflows
• Measure vibrations on fan casing
Install wire guards on front and back of fan (IP20)
• Check fan suspension
AZT: Remove transport brackets
- reinsert bracket screws in fan casing
• Visual inspection – rotor, casing, silencers and
electric connection
Maintenance of fans
Before start-up
• See “Before inspection and maintenance”
Inspect wire guards
• Clean the fans
Clear fans and airflow ways
• Replace broken parts
Brief on-off cycle to verify rotational direction
• Service the fans
• Brief on-off cycle to verify rotational direction
Start-up
Power on fans
Troubleshooting
Check for abnormal sounds and vibrations
Lacking performance
Measure vibrations – section “Vibrations” on page 5
• Inlet or outlet blocked
After 30 min. operation – check for abnormal sounds
• Auxiliary fans stopped
• Motor defective
Before inspection and maintenance
• Motor disconnected
Turn off power for fans
• Electric connection defective
Disconnect power supply
• Wrong rotational direction of rotor
Lock power switches
Noise and vibrations
• Motor bearings defective
• Rotor imbalance
• Rotor worn or damaged
• Loose components
• Rotor blades – different angles, loose or broken
• Fan operates in stalling area