Engineered Air HVAC Unit LM-3-C

Inspect coils and drain pans for cleanliness and biological growth

Clean external surface of finned coils using low pressure water spray and brush

Ensure no high pressure steam or water is used for cleaning

Verify cleaning additives or solutions are compatible with coil materials or coatings

Use a fin comb to straighten any damaged or bent fins

Drain and blow out water coils with compressed air

Fill and drain coils several times with appropriate strength pre-mixed inhibited HVAC glycol or other suitable fluid

Check set screws for looseness on the shaft

Tighten set screws where required

Record any issues found during the check

Refer to bearing manufacturers’ literature for torque specifications

Disconnect and lock out power before servicing

Ensure no interlock or safety switches are bypassed

Is there any mold or biological growth present?

Describe the actions taken to remove and sanitize mold or biological growth

Attach maintenance history file for the unit

Check all wiring for loose connections

Enter the voltage at unit while in operation

Check if the fan bearings are permanently lubricated sealed ball bearings

Select the shaft diameter for grease quantity

Is the bearing temperature under 158°F (70°C)?

Is the environment dusty and wet?

Was the bearing greased with a lithium base lubricant?

Was the bearing greased while rotating slowly?

Was the correct amount of grease applied according to the shaft diameter?

Additional notes or observations

Check if the fan has permanently lubricated sealed ball bearings

Is the bearing rotating slowly during lubrication?

Select the shaft diameter to determine grease quantity

Is lithium base lubricant used?

Is the grease quantity appropriate for the selected shaft diameter?

Are extended lubrication lines provided and tubing not factory filled?

Refer to the fan and/or bearing manufacturers’ literature for additional information

Check the conditions chart for re-greasing interval