Owner`s manual
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10. Check the connection on all ground rods and hardware.
11. Inspect the surge arrestor(s). Replace if there are signs of damage.
12. Restart the turbine.
13. Listen to the sound of the machine as it speeds up. No mechanical sounds, such as a "clunking" or
"banging," should be heard. Also watch for any new or significant vibration. Some “growling” from
the alternator is normal. The turbine operation should be smooth.
14. Inspect the wire run, particularly all electrical connections.
15. Check condition of all wiring connections into and out of the PowerCenter.
Preventive Maintenance
The Bergey EXCEL 1 turbine and tower should be inspected 30 days after installation, and then again
180 days after installation.
Following these two inspections the installation should be inspected every two years and after any partic-
ularly severe weather. Inspections should be done on days when the wind is below 16 mph.
Check List for Inspections
1. Inspect the blades for:
A. Cracks outboard of the hub pad, in the blade pultrusion itself. Cracks in the molded hub
pad are normal after a few weeks of operation and will not affect the strength or reliability of the
blade.
B. Leading or trailing edge damage.
C. Condition of the paint.
2. Check the torque on the blade nuts; the recommended value is 45 ft-lbs. Check the bearings for seal
integrity and grease loss.
3. Inspect the mainframe for cracks.
4. Check for cracks or loose hardware on the tail boom, bushings, and fin.
5. Check the tail pivot pin and particularly its fasteners.
6. Check the connection on all ground rods and hardware.
7. Remove the alternator shorting connection. Check the disconnect switch.
8. Inspect the wire run, particularly all electrical connections.
9. Check condition of all wiring connections into and out of the PowerCenter.
We recommend that the bearings be re-packed (re-greased) every 8-12 years. There are four tapered
roller bearings, two for the alternator and two for the tower adapter. They are all the same size (Timken
L44643/L44610), except for the lower yaw bearing on EXCEL 1’s shipped after September 2003. There
are two bearing seals and we recommend that these seals be replaced when the bearings are re-packed.