Engineered Air HVAC Unit LM-3-K

Disconnect and lock out power before servicing

Ensure no interlock or safety switches are bypassed

Is there any mold or biological growth present?

Describe the actions taken to remove and sanitize mold or biological growth

Check all wiring for loose connections

Check voltage at unit (while in operation)

Check amperage draw against unit rating plate

Check set screws on fan wheel, fan bearings, fan and motor pulleys for looseness on the shaft

Tighten set screws where required

Ensure not to overtighten set screws to avoid bearing damage

Record torque applied for Dodge SC 203-215 series by shaft diameter

Refer to bearing manufacturers’ literature for torque specifications for other types of bearings

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

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

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

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 the filter replacement

Check for proper operation of controls

Repair or replace faulty controls

Replace blown fuses with equivalent size and type