Howden ELF - Default Chapter; Table of Contents

Howden 24-07.030r04 2/25
E-series Axial Flow Cooling Fans
Service Manual
INDEX
I. General Information ........................................................................................................................ 3
Introduction ........................................................................................................................................ 3
Description ......................................................................................................................................... 3
Options / Accessories (at extra cost) ................................................................................................. 3
Field Service ...................................................................................................................................... 3
II. Receiving / Handling / Storage / Disposal .................................................................................... 4
Fan identification ............................................................................................................................... 4
Receiving and unloading ................................................................................................................... 5
Handling ............................................................................................................................................. 5
Storage .............................................................................................................................................. 5
De-commissioning ............................................................................................................................. 6
Exploded view and part list ................................................................................................................ 7
III. Installation ..................................................................................................................................... 8
Required Tools .................................................................................................................................. 8
Rotation and flow direction ................................................................................................................ 8
Preparation ........................................................................................................................................ 8
Coupling flange with parallel bore ..................................................................................................... 9
Coupling flange with tapered bushing ............................................................................................... 9
Hub-plate installation ....................................................................................................................... 10
Blades installation..........................................................................................................................12
Minimum tip-clearance .................................................................................................................... 14
Impeller diameter reduction ............................................................................................................. 15
Retaining plate ................................................................................................................................. 15
Balancing ......................................................................................................................................... 16
IV. Commissioning ............................................................................................................................ 16
V. Preventive Maintenance .............................................................................................................. 18
VI. Contact Howden ......................................................................................................................... 19
VII. Trouble Shooting ....................................................................................................................... 20
VIII. Overview Tightening Torques ................................................................................................. 23
IX. Hardware Overview .................................................................................................................... 24
X. Guideline for acceptable vibration levels of cooling fans in application category BV-3
(according ISO 14694) ...................................................................................................................... 25
XI. Document Version Control ........................................................................................................ 25