Engineered Air HVAC Unit DJ-20

WARNING — High Voltage and Moving Parts

Disconnect and lock out power before servicing

Do not bypass any interlock or safety switches

Follow cleaning instructions to reduce risk of mold or bacterial growth

Document any mold or biological growth issues and actions taken

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

Verify proper operation after servicing

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

Select the motor lubrication interval based on service hours per day

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 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

Adjust the slide damper for seasonal operation

Outdoor Air Intakes, Mixing Sections and Dampers

Check the following for cleanliness, integrity, and proper operation

Check the condition of the filters

Is the filter due for a scheduled change?

Replace the filter if necessary

Record the date of filter inspection and replacement