04_Howden_Installation-Maintenance D-Series Fans.pdf

Service Manual

Installation and Maintenance D-Series Axial Flow Cooling Fans

Note

Warning

The blades installation sequence has been changed when compared with our Z-series Manual!

Failure to comply with these instructions could cause serious bodily harm or property damage and will void the warranty.

Howden

24-07.022r01E 1/20

Service Manual INDEX I. General Information ........................................................................................................................ 3 Introduction ........................................................................................................................................3 Description .........................................................................................................................................3 Options / Accessories (at extra cost) .................................................................................................3 Field Service ......................................................................................................................................3 II. Receiving / Handling / Storage ..................................................................................................... 4 Fan identification ...............................................................................................................................4 Receiving and unloading ...................................................................................................................5 Handling.............................................................................................................................................5 Storage ..............................................................................................................................................5 Exploded view and part list ................................................................................................................6 III. Installation ..................................................................................................................................... 7 Required Tools ..................................................................................................................................7 Rotation and flow direction ................................................................................................................7 Preparation ........................................................................................................................................7 Coupling flange with parallel bore .....................................................................................................8 Coupling flange with tapered bushing ...............................................................................................8 Hub-plate installation .........................................................................................................................9 Blades installation ............................................................................................................................10 Minimum tip-clearance ....................................................................................................................12 Impeller diameter reduction .............................................................................................................13 Retaining plate .................................................................................................................................13 IV. Commissioning ........................................................................................................................... 13 V. Preventive Maintenance .............................................................................................................. 15 VI. Contact Howden ......................................................................................................................... 15 VII. Trouble Shooting ........................................................................................................................ 16 VIII. Overview Tightening Torques .................................................................................................. 18 IX. Maximum Vibration Levels for Balance Vibration category BV-3 (ISO 14694) ...................... 19 X. Document Version Control .......................................................................................................... 20

Howden

24-07.022r01 2/20 D-series Axial Flow Cooling Fans

Service Manual I. GENERAL INFORMATION

Allowable operating temperature

All diameters

Introduction This manual provides information necessary to install, operate and maintain D-series axial flow cooling fans. Maintenance guidelines and procedures are set so that your equipment will operate efficiently, with a minimum of repair or replacement requirements.

Min. - 20°C - 4°F

Max. + 65°C + 149°F

Allowable incidental upset temperature (100 = mm,