Engineered Air HVAC Unit HE40/O/MV

Determine filter-changing intervals based on

Record the pressure drop across the filter (if applicable)

Is the filter excessively dirty or plugged?

Remove or relocate filters for units with high levels of outside air during winter months

Check and clean High Velocity Permanent filters

Ensure replacement filters are of the same size and type

Are there any chemical or biological hazards in the used filters/media?

Describe any chemical or biological hazards found in the used filters/media

Remove any scale from the burner plates

Ensure that the holes on the burner plates and gas orifices are clear of foreign material

Verify orifice sizes on tee casting

Check if the fan bearings are permanently lubricated sealed ball bearings

Is the bearing rotating slowly during lubrication?

Is a lithium base lubricant being used?

Are extended lubrication lines provided?

Select the shaft diameter to determine grease quantity

Is the bearing temperature under 120°F (50°C)?

Additional notes or observations

Select the SAE value based on operating temperature

Measure the oil’s operating temperature

Is the oil level at the center of the lower-most roller?

Refill with new mineral oil of selected SAE value

Check for any oil leaks after refilling

Check set screws for looseness on the shaft

Tighten set screws where required

Was the check performed before initial start-up?

Was the check performed after a run-in period of 2 weeks?

Was the check performed at 4 month intervals?

Record any issues found during the check

Record the torque values applied to set screws

Refer to bearing manufacturers’ literature for other types of bearings