10
Centrifugal In-line EC Duct Fans – RR EC
Installation and Operating Instructions
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Terminal compartment access is only permitted after power supply is disconnected and 5 min . wait . period .
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The rotating impeller can crush fingers .
Before any servicing and maintenance work, isolate the fan from the mains power supply and protect against
being switching on again!
– In principle, the units are maintenance-free, there are no user maintenance provisions.
– Excessive deposits of dirt, dust, grease, etc. on the impeller, motor, protection guard and, above all, between the
housing and the impeller, are not permitted, as these can lead to an unbalance in the impeller, overheating of the
motor or the blocking of the impeller. In such cases, the unit must be cleaned.
– In cases of longer periods of standstill, maintenance must be carried out when the unit is restarted.
– In case of standstill or storage for more than 2 years, the motors must be replaced.
The following must be checked:
• Secure attachment of the fan to the subsurface / system, replace in case of doubt
• Remove contaminant deposits
• Mechanical damage, disconnect unit, replace damaged parts
• Tight fit of screw connections, do not loosen screws in the process!
• Casing quality (cracks, brittleness of the plastic)
• Free movement of the impeller, impeller does not move freely, see Fault causes 8.2
Wear protective gloves when checking unhindered running of impeller!
• Bearing noises
• Vibrations – see Fault causes 8.2
• Power consumption according to type plate – see Fault causes 8.2
8 .1 Cleaning
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WARNING!
An insulation/installation fault may result in electric shock!
Before cleaning, isolate the fan from the mains power supply and protect against being switching on again!
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WARNING!
The unexpected rotating impeller can crush fingers .
Before cleaning, isolate the fan from the mains power supply and protect against being switching on again!
– Clean casing and impeller with a damp cloth
– The motor must not come into contact with water!
– Do not use aggressive cleaning agents that could damage the paintwork!
– High pressure cleaners or water jets are not permitted!
8 .2 Fault causes
8 .3 Standstill and disposal
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WARNING
When dismantling, live parts can be exposed, which can result in electric shock if touched . Before dismant-
ling, isolate the unit from the mains power supply and protect against being switching on again!
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WARNING
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WARNING
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WARNING
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WARNING
Fault
Causes
Solution
Fan does not start
– No voltage
Check mains voltage
Check connection according to wiring diagram
– Impeller blocked
Clear blockage, clean, replace if necessary
– Motor blocked
Contact Helios customer services
Fan does not turn
(no longer turns)
– Mains voltage failure
Check mains voltage
– Thermal contact (TK) has trigge-
red
- Check/clear inflow and outflow
- Check transport media, ambient temperature
- Check supply voltage
– Fuse has tripped
«Fuse has tripped»
– Impeller blocked or
contaminated
Clear blockage, clean, replace impeller if necessary
Fuse has tripped
– Shorted coil in motor
Contact Helios customer services
– Supply line or connection
damaged
Replace parts, replace motor if necessary
(Contact Helios customer services)
– Connected incorrectly
Check, modify connection
Vibrations
– Contamination
Clean
– Attachment-related resonance
Check or repair attachment
Abnormal noises
– Grinding impeller
Clean impeller, replace if necessary
– Bearing damage
Contact Helios customer services
– Mechanical damage
Carry out maintenance
Fan no longer perfor-
ming (speed)
– Insufficient air delivery
Check/clear inflow and outflow
– Incorrect voltage
Check/modify connection
– Bearing damage
Contact Helios customer services
– Contamination
Clean
– Insufficient backflow
Widen backflow openings
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WARNING
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EN
