Howden ELF - Guideline for acceptable vibration levels of cooling fans in application category BV-3 (according ISO 14694); Document Version Control

Howden 24-07.030r04 25/25
E-series Axial Flow Cooling Fans
Service Manual
X. GUIDELINE FOR ACCEPTABLE VIBRATION LEVELS OF COOLING FANS IN
APPLICATION CATEGORY BV-3 (ACCORDING ISO 14694)
CONDITION
RIGIDLY MOUNTED
(1)
FLEXIBLY MOUNTED (2)
PEAK
[MM/S]
R.M.S.
[MM/S]
PEAK
[MM/S]
R.M.S.
[MM/S]
START-UP
6.4
4.5
8.8
6.3
ALARM
10.2
7.1
16.5
11.8
SHUTDOWN
12.7
9.0
17.8
12.5
* Rigidly mounted: Structure of concrete
** Flexibly mounted: Structure of steel, wood or composite
Table 10
XI. DOCUMENT VERSION CONTROL
Version 03 12 April 2007 Adjustment of blades installation warning block
Adjustment of preventive maintenance
Adjustment of commissioning including figure of “vibration
measuring points”
Supplement AISI terminology with A2/A4 references
Adjustment of blades installation warning block
Adjustment of preventive maintenance instructions
Adjustment of trouble shooting table in “vibration level high”
item
Replacement of the word “galvanised” into “electro-
galvanised”
Fit information added at installation instructions of parallel
bore coupling flanges
Adjustment of blade assembly procedure regarding re-
tightening after blade angle adjustment
Adjustment of instructions coupling flange with tapered
bushing
Replacement of the word cap screws into bolts