NOVENCO CNA Series Installation And Maintenance Manual Download Page 1 | Manualshive

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Pure competence in air.

916505-0

CNA-CNB

CENTRIFUGAL FANS

INSTALLATION

AND MAINTENANCE

ENGLISH

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Summary of Contents for CNA Series

Page 1: ...Pure competence in air 916505 0 CNA CNB CENTRIFUGAL FANS INSTALLATION AND MAINTENANCE ENGLISH ...

Page 2: ...ions with no risk of con densation the storage period is 6 months If the storage period exceeds 3 months it is recommended to loosen any belt drive connection and turn the impeller regu larly by hand The storage location must not be exposed to vibrations likely to damage the bearings 4 Installation 4 1 Attachment The fan can be mounted on any of the four edges of the casing However it must be note...

Page 3: ...eck that the vibration level is nor mal This is especially important if motor and belt drive are not assem bled at the factory but assembled af terwards In those cases the effective vibration speed is measured which must not exceed 7 1 mm s RMS measured on the bearing housings After 30 minutes of operation check that the fan operates normally and that the belt drive still has the correct tension I...

Page 4: ...y tightened 5 Mounting and adjustment of belts See section 6 5 Belt change and adjustment 6 7 Bearing assembly The belt driven fans are provided with a bearing assembly The construction of the bearing assembly varies according to fan size and type so when changing a bearing assembly follow one of the be low procedures depending on size and type of fan After mounting of new bearings the im peller m...

Page 5: ...check alsospeedandpower consumption as when changing the mo tor When mounting the motor the im peller must be carefully centred in rela tion to the inlet cone CNA CNA M 250 400 D and CNB CNB M 400 D See fig 10 The motor is mounted on a conical cover whichismounteddirectinthebackplate of the fan casing The motor must be a standard motor with B 14 flange with threaded holes If so the fan casing is i...

Page 6: ...ation Deficiency in performance Blocked air supply on fan inlet side Damper closed Duct choked Installation conditions resulting in poor air flow to impeller Impeller has wrong direction of rota tion Motor defective Motor cut out Noise vibrations Bearings in motor or bearing assem bly defective Impeller out of balance Impeller worn damaged Loose screws components Impeller has wrong direction of ro...

Page 7: ...pplied standards and regulations EU 327 2011 Fans driven by motors with electric power between 125 W and 500 kW EN ISO 12100 2011 Safety of machinery General principles for design Risk assessment and risk reduction EN ISO 13857 Safety of machinery Safety distances EN 60204 1 Safety of machinery Electrical equip ment of machines Part 1 General Re quirements EN 61000 6 2 EMC Part 6 2 Generic standar...

Page 8: ...Pure competence in air WWW NOVENCO BUILDING COM ...

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