Engineered Air HVAC Unit LM-1-C

Inspect coils and drain pans for cleanliness and biological growth

Clean the external surface of finned coils using a low pressure water spray and a 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 loose set screws where required

Record any observations or issues encountered during the check

Check the condition of the filters

Is the filter due for a scheduled change?

Replace the filter if necessary

Record the date of the filter change

Check set screws for looseness on the shaft

Tighten set screws where required

Was the check performed before initial start-up, after a run-in period of 2 weeks, and then on 4 month intervals?

Record any issues found during the check

Ensure not to overtighten set screws to avoid bearing damage

Refer to Table I for Bearing Setscrew Torques by shaft diameter and bearing manufacturer

Check if the fan bearings are permanently lubricated sealed ball bearings

Select the shaft diameter for lubrication

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

Is the environment dusty and wet?

Use lithium base lubricant for greasing

Ensure not to overgrease the bearings

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