Engineered Air HVAC Unit DG-220

WARNING — High Voltage and Moving Parts

Disconnect and lock out power before servicing

Do not bypass any interlock or safety switches

Follow cleaning instructions and recommended inspection schedule

If mold or biological growth is present, describe the cause and corrective actions taken

Properly remove and dispose of contamination if present

Properly clean and sanitize affected area using approved sanitizers

Label all wires prior to removal when servicing controls or critical components

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

Adjust the slide damper for seasonal operation

Outdoor Air Intakes, Mixing Sections and Dampers

Check the following for cleanliness, integrity, and proper operation

Inspect coils and drain pans for cleanliness and biological growth

Clean external surface of finned coils using a low pressure water spray and a brush

Ensure 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

Ensure propylene glycol is not used with CPVC piping

Refer to motor manufacturer for lubrication recommendations

Remove grease drain plugs and operate motor for 15 minutes before replacing plugs

Ensure not to over grease the motor

Note any severe conditions affecting motor operation

Recommended Motor Lubrication Intervals for motors up to 7.5 HP (5.6 kW)