Emerson Liebert DS Precision Cooling System 28-105kW Manuel D’Utilisation

The Liebert Air Economizer requires little maintenance when proper installation, startup and 

operation procedures are followed. The following tasks should be performed at the intervals stated:
___ 1. Check outside air entry ducting every 4-6 weeks for precipitation infiltration. Alter outside 

opening as required.

___ 2. Check screen and filters monthly or more often, depending on air quality.

Replace or clean as necessary.

___ 3. Inspect the damper system (louvers, motor and linkage) at startup and every 4-6 weeks for 

proper adjustment, dust, dirt and corrosion. Clean any matter that will inhibit air flow with 

compressed air or commercial coil cleaner.

___ 4. Check for bent or damaged components and repair as necessary.
___ 5. Monitor for air leaks during normal operation; check for air leakage every six months.
___ 6. Verify powered relief air system during normal operation; check operation every six months.
Perform all maintenance on your indoor cooling unit (Liebert DS or Liebert CW) as required.