Trane CCEB Installation Operation & Maintenance page 83

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