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70 BCXC-SVX01B-EN
Maintenance
Winterizing the Coil
Make provisions to drain coils that are not in use, especially when subjected to freezing
temperatures.
To drain the coil, first blow out the coil with compressed air. Next, fill and drain the tubes with full-
strength ethylene glycol several times. Then drain the coil as completely as possible.
NOTICE
Potential coil-freeze condition!
Make provisions to drain the coil when not in use to prevent coil freeze-up. Failure to follow this
procedure could result in equipment damage.
Periodic Maintenance Checklists
Monthly Checklist
The following check list provides the recommended maintenance schedule to keep the unit running
efficiently.
ƽ WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
ƽ WARNING
Rotating parts!
Secure drive sheaves to ensure motor cannot freewheel. Failure to follow this procedure could
result in death, personal injury or equipment damage.
1. Inspect unit air filters. Clean or replace if airflow is blocked or if filters are dirty.
2. Check the condition and tension of fan belts. Adjust tension if belts are floppy or squeal
continually. Replace worn or fraying belts in matched sets.
Note: Check and adjust belt tension at least twice daily the first days of new belt operation. Belt
tension will rapidly decrease until the belts are run in.
3. Re-lubricate motor bearings, if motor is fitted with oil tubes and operating conditions include
moist or dirty air, continuous duty and/or high temperatures.
Semi-Annual Maintenance
1. Verify the fan motor is properly lubricated. Follow lubrication recommendations on the motor
tag or nameplate. Contact the motor manufacturer for more information.
2. With power disconnected, manually rotate the fan wheel to check for obstructions in the
housing or interference with fan blades. Remove any obstructions and debris.
3. Check the fan assembly sheave alignment. Tighten set screws to their proper torques.
4. Check fan belt tension. Adjust if belt is slipping. Replace if belt is worn or frayed.
5. Inspect the coils for dirt build-up. Clean fins if airflow is clogged.
Annual Maintenance
Check and tighten all set screws, bolts, locking collars and sheaves.
1. Inspect, clean, and tighten all electrical connections and wiring.