Engineered Air HVAC Unit LM-38-K

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 coils

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

Measure the static pressure drop across the DX coil

Does the static pressure drop match the specified value in the Unit Function?

Adjust bypass dampers to match the specified static pressure drop, if necessary

Ensure proper airflow across the DX coil when mechanical cooling is operating

Outdoor Air Intakes, Mixing Sections and Dampers

Check cleanliness of outdoor air intakes, screens, and adjacent areas

Verify integrity of outdoor air intakes, screens, and adjacent areas

Ensure proper operation of outdoor air intakes, screens, and adjacent areas

Remove tie-down bolts, straps and blocks

Set all associated electrical switches, controls, thermostats and main disconnect switch to 'OFF' position.

Close all manual valves and field piping valves.

Confirm that all shipping materials have been removed.

Check all bearings, drive and fan set screws for tightness.

Check drive alignment and belt tension.

Inspect all electrical wiring for loose connections.

Check set screws for looseness on the shaft

Tighten set screws where required

Record any observations or issues noted during the check

Refer to Table I for Bearing Setscrew Torques