Engineered Air HVAC Unit DJ-100

Is the bearing rotating slowly during lubrication?

Is a lithium base lubricant used?

Are extended lubrication lines provided?

Enter the shaft diameter in inches

Enter the grease quantity used in ounces

Ensure not to use non-lithium based grease

Close the upstream manual gas valve

Connect a ¼” (6mm) tube to the outlet pressure tap on the safety shutoff valve

Immerse the opposite end of the ¼” (6mm) tube vertically ½” (13mm) into a clear container of water

Count the number of bubbles appearing during a 10 second period

Is the bubble rate greater than that noted in the table?

If the bubble rate is greater than noted, choose the action taken

If bubble rate is less than noted, remove the ¼” (6mm) tube and reconnect the outlet pressure tap plug

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

Use a fin comb to straighten any damaged or bent fins

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

Ensure water coils not in use are protected from freezing

Drain and blow out coils with compressed air

Check if the fan has permanently lubricated sealed ball bearings

Is the bearing rotating slowly during lubrication?

Is a lithium base lubricant being used?

Are you avoiding over-greasing?

Select the shaft diameter and apply the correct grease quantity

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

Is the environment dusty and wet?

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

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?

Ensure the oil is not overfilled

Complete the lubrication change