Maintenance Requirements During Storage; Start-Up Preparation After Prolonged Storage - BAC Vertex VRC A-1012N Series Operation & Maintenance Manual

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If not stored indoors in a controlled environment, some form of heating must be utilized to prevent condensation from
accumulating in the motor. This heating should maintain the winding temperature at a minimum of 9ºF (5ºC) above the
ambient temperature of the surrounding environment, keeping it from dropping below the dew point where condensation
could form inside the motor. If space heaters are supplied, they should be energized. Request the required voltage and
transformer capacity from your local BAC Representative. A third option is to use an auxiliary heat source and keep the
winding warm by either convection or blowing warm air into the motor.
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Rotate the motor shaft monthly to redistribute bearing grease.

Maintenance Requirements During Storage

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Rotate all fans and motor shafts monthly by hand. Hand-turning will ensure that the shafts and bearings are free and will
redistribute grease within the bearings.
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Inspect the basin monthly to ensure that the drain is open and remove any leaves or debris that may have accumulated
on the water guards and in the basin.
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Inspect the axial fans annually to ensure the blades are tight and there is no obvious corrosion between the hub and the
fan blade.
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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.
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Motors should be thoroughly inspected, cleaned, and restored to pre-storage condition.
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Inspect axial fans 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 fans if there is obvious corrosion of fan components. Loose fan blades could
result in fan failure and possible injury or damage.
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Reinstall all fan belts, motors, door gaskets, and drain plugs (as applicable), and remove all protective coverings.
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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.
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Perform an insulation test of motor windings to ensure satisfactory insulation resistance.
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Conduct full start-up procedure as stated in the Start-Up Procedure on Page 12. Be especially thorough for cleaning and
inspection prior to start-up.
Vertex™ Evaporative Condenser Operation & Maintenance Manual – Unit Operation and Storage
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