Engineered Air HVAC Unit HE70/O

Check the current position of the slide damper

Adjust the slide damper for the current season

Ensure the slide damper is securely positioned

Outdoor Air Intakes, Mixing Sections and Dampers

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

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

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

Lubrication of Dodge Fan Bearings — Ball Bearing Pillow Block

Select the shaft diameter and speed (RPM) for lubrication schedule

Is it safe to re-lubricate while running?

Re-lubricate while running until some purging occurs at seals, if safe

Adjust lubrication frequency based on condition of purged grease

Note hours of operation, temperature, and surrounding conditions affecting lubrication frequency

Double the lubrication frequency for 24-hour operation

Select the grease type used for lubrication

Lubricate bearings prior to extended shutdown or storage

Is the bearing rotating slowly?

Is a lithium base lubricant being used?

Enter the shaft diameter in inches

Select the grease quantity based on shaft diameter

Is the grease quantity correct according to the shaft diameter?

Are extended lubrication lines provided?

Was the lubrication performed without overgreasing?

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