Vertiv Liebert DME22 - Page 17

Vertiv™ | Liebert® DM | User Manual 7
Overview
• Microprocessor
Figure 1-7 Microprocessor Controller Screen
Vertiv™ Liebert® DM air conditioning unit is configured with 7-inch HMI color screen. The user-friendly interface operation
is simple. The multi-level password protection feature can eectively prevent unauthorized operation. It also provides self
recovery on power failure; high & low voltage protection functions and phase loss protection. The operation status of the
components are available on the respective menus. The expert-level fault diagnosis system can automatically display the
current fault information, facilitating easy maintenance.
• Thermal Expansion Valve (TXV)
The Liebert® DM unit has an external equalizer type mechanical Thermal Expansion Valve (TXV) which accurately regulates
the refrigerant flow into the evaporator.
Figure 1-8 Thermal Expansion Valve (TXV)