Engineered Air HVAC Unit HE321/O

Remove tie-down bolts, straps and blocks

Set all associated electrical switches, controls, thermostats and main disconnect switch to 'OFF' position.

Close all manual valves and field piping valves.

Confirm that all shipping materials have been removed.

Check all bearings, drive and fan set screws for tightness.

Check drive alignment and belt tension.

Inspect all electrical wiring for loose connections.

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

Select the motor lubrication interval based on service hours per day

Check if the motor runs in severe conditions and grease as specified by the manufacturer

Check set screws for looseness on the shaft

Tighten set screws where required

Record any issues found during the check

Ensure no overtightening of set screws

Refer to Table I for Bearing Setscrew Torques

Refer to bearing manufacturers’ literature for other types of bearings

Check the condition of the filters

Is the filter due for replacement based on the schedule or condition?

Replace the filter if necessary

Record the date of filter inspection and replacement

Is the bearing rotating slowly during lubrication?

Is a lithium base lubricant being used?

Enter the shaft diameter in inches or millimeters

Select the grease quantity based on shaft diameter

Is the grease quantity correct according to the shaft diameter?

Is the bearing temperature under 120°F (50°C) in a dusty environment?

Is the bearing temperature under 158°F (70°C) in a clean environment?