Vertiv™ | Liebert® DM | User Manual 8
Overview
• Filter Dryer
Moisture can adversely aect the operations and service life of a system in the refrigeration life-cycle. In order to rectify this
condition, the unit is equipped with a filter dryer that can filter out, hold, and prevent the moisture particles from circulating
through the system.
Figure 1-9 Filter Dryer
• Sight Glass (Only for 22 kW and 27 kW)
The sight glass is an utility used for observing the refrigerant state; specifically, the moisture content of the system. If the
moisture content exceeds the levels of defined standards, then there is a color change in sight glass, indicating the presence
of moisture content in the refrigerant.
Figure 1-10 Sight Glass
• Air Filter
The Liebert® DM unit is equipped with a nylon air filter rated for 90% filtration eiciency at 10-micron particle size. The air
filter has features such as compact structure, reusable, and easy maintenance.
A standard G4 filter option is available on request, contact Vertiv representative for more details.
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