The Liebert® CWis a single component inthe facility heat-removal system. The system includes air distribution(raised
floors, duct systems), outdoor heat rejection(pumps) and indoor cooling and humidity loads (equipment load, location,
outside air infiltration). Proper application and maintenance of the entire system is critical tothe life and reliability of the
thermal-management units.
• Good maintenance practices are essential to minimizing operation costs and maximizing product life.
• Read and follow monthly and semi-annual maintenance schedules included inthis manual. These MINIMUM
maintenance intervals may need tobe more frequent based onsite-specific conditions.
• See the Liebert®iCOM™ user manual, SL-31075, available at www.Vertiv.com, for instructions onusing the
controller to predict some service maintenance intervals.
• We recommend the use of trained and authorized service personnel, extended service contracts and factory-
specified replacement parts. Contact your Vertiv sales representative.
10.1 Filters
Filters are usually the most neglected item inanenvironmental control system. Tomaintainefficient operation, they should
be checked monthly and changed as required. Because replacement intervals vary with environmental conditionand filter
type, eachunit is equipped with a filter clog switch. Thiswarns of restricted airflow through the filter compartment by
activating the Change Filter alarm.
• Turnpower Off before replacing filters.
• Filters canbe replaced from either end by opening the end doors.
• OnCW106 and CW114 units, filters canbe replaced from the front.
• CW146 and CW181 units contain filters ina filter plenum that permits removing the filters from the front.
• Removing the middle filters will allowyoutoremove the filters onthe end. Install the new end filters first,
then the middle ones.
• Replacement filters are commercially available inseveral efficiencies. For Liebert® CWunits, refer to the
technical data manual, SL-18061, for filter sizes.
• After replacing the filter(s), test the operation of the filter clog switch. Turn the adjusting screw counter
clockwise to trip the switch—this will energize the Clogged Filter alarm. Acknowledge the alarm by pressing
the horn buttononce.
To adjust the switch:
1. With the fanrunning, set the switch to energize the light withclean filters. The unit panels must all be inplace
and closed toaccurately find this point.
2. Turnthe adjusting knob one turnclockwise, or tothe desired filter change point.
Vertiv | Liebert® CW™Installer/User Guide
82
To Next Page
Loading...
Need help?
General