-
Check vibration isolators for proper mounting / damage (visual inspection).
-
Check the protection grid (Fan in and/or outlet) if available for correct installation / dam-
aged (visual inspection).
-
Check the drain (if available) for function.
-
Test the wheel by rotating it by hand for abnormal noises.
-
Rotate the wheel by hand and check for strange bearing noise.
-
Renew both bearings if there are irregular or rough sounds.
-
The theoretical lifetime, depending on the operating conditions, is at least 20,000 hours.
-
The fan bearings are lubricated for life, only the large fan sizes with pillow block bearings
annually must be lubricated with adverse operating conditions according to the following
). After three lubricate the bearings must
be removed, cleaned and greased again.
Ambient conditions
Temperature range °C
Lubrication interval
Clean
T < 50
6 - 12 month
50 < T < 70
2 - 4 month
70 < T < 100
2 - 6 weeks
100 <
1 week
Dusty
T < 70
1 - 4 weeks
70 < T < 100
1 - 2 weeks
100 < T
1 - 7 days
Extreme humidity
1 week
Table 8:
Lubrication intervals for fan bearings
Figure 129:
Fan bearing with grease nipple
(example Comefri NTHZ)
Supplier
Type
Basis
Temp. range
FINA
Marson HTL 3
Lithium
30°C / +120°C
SHELL
Alvania Fett 3
Lithium
-20°C / + 130°C
ESSO
Beacon 3
Lithium
-20°C / + 130°C
MOBIL
Mobilux EP3
Lithium
-30°C / + 130°C
Table 9:
Recommended grease types
Summary of Contents for CCEB
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