9
9
Instructions for Optional Gear Drive Units
Follow the procedures below when a gear drive will not be used for a prolonged period of
time.
• Drain all of the old oil from the gear drive and properly discard.
• Re-install drain plug.
• Remove the air breather from the gear drive.
• Completely fill the gear drive through the air breather port with a recommended
lubricant listed in the “Fan Drive System” section.
• After completely filling the gear with oil, plug the previously removed air breather port,
and all remaining open ports. Use steel plugs to plug the openings, and store the air
breather so that you can reuse it when the gear drive is put back in operation.
• Securely attach a “warning” tag to the gearbox and motor starter stating that it has
been “overfilled” to remind start-up personnel that they need to drain the gear oil
back to the proper level before using.
• To establish a positive moisture barrier, cover the drive with a tarpaulin or other
protective cover.
Maintenance Requirements
• Rotate all fans and motors shafts monthly by hand. Hand-turning will ensure that the
shafts and bearings are free and will redistribute grease within the bearings.
• Inspect the cold water basin monthly to ensure that the drain is open and remove any
leaves or debris that may have accumulated in the cold water basin.
• Inspect axial fans prior to start-up and at least once annually to ensure that the blades
are tight and that there is no obvious corrosion between the hub and the fan blade. Do
not energize the fans if there is obvious corrosion of fan components. Loose fan blades
could result in fan failure and possible injury or damage.
• Inspect the rust preventative coating on all motor external machined surfaces
including shaft extensions monthly. If necessary, re-coat the surfaces with RUST
VETO
®
.
Start-Up Preparation After Prolonged Storage
Keep in mind that start-up procedures after long periods of storage are just as important
as pre-shutdown procedures.
• Motor should be thoroughly inspected and cleaned to restore it to pre-storage
condition.
• Inspect axial fan(s) prior to start-up to ensure that the blades are tight and that there
is no obvious corrosion between the hub and the fan blade. Do not energize the fan(s)
if there is obvious corrosion of fan components. Loose fan blades could result in fan
failure and possible injury or damage.
• Reinstall all fan belts, motors, door gaskets, and drain plugs (as applicable), and
remove all protective coverings.
• For units stored prior to installation, conduct rigging procedures as directed in the
unit’s Rigging and Assembly Instructions, available on www.BaltimoreAircoil.com or
by contacting your local BAC Representative.
• Perform an insulation test of motor windings to ensure satisfactory insulation
resistance.
• Conduct full start-up procedure as stated in the “Start-Up Procedure” on
page 5
.
Be especially thorough for cleaning and inspection prior to start-up.
NOTICE:
Upon start-up, the gearbox
must be drained back to the proper
level before operation to prevent
damage. The fan motor should be
locked and tagged out in order to
prevent operation until the oil level
is returned to normal.
Unit Operation and
Storage
Prolonged Outdoor Storage
Motor Recommendations
Maintenance Requirements
Start-Up Preparation After
Prolonged Storage