Howden ELF - Page 26

Howden 24-07.030r04 26/25
E-series Axial Flow Cooling Fans
Service Manual
Adjustment of text: another step in blades installation
procedure
Replacement of “TIP” at the end of blades installation
procedure.
Version 04 December 1, 2010 Removed “mild” before “steel hub” in “description”, p3.
Changed allowable operating temperature in table 1 :
Max.
+ 65°C
+ 149°F
Inserted section: “De-commissioning”
Vibration measurement procedure changed in g. of chapter:
“IV. Commissioning”
Inserted “Possible” to heading “Measuring Points” p15.
Added a new chapter:
IX. Maximum Vibration Levels For Balance Vibration category
BV-3 (ISO 14694) & added Table 9
Changed material codes:
Old
New
AISI 304
A2
AISI 316
A4
Inserted „‟Blades Installation‟‟ „‟Procedure b‟‟, p13
Inserted „‟ IV Commisioning‟‟ „‟Section G‟‟ p17