Table of Contents
Chapter 1 Overview
2
Water flow regulating valve
The water flow regulating valve can regulate the chilled water flow according to the cooling demand. The water flow
regulating valve adopts union swivel for the connection with the system pipes, which is convenient for the onsite
installation and maintenance.
Filter
High polymer dust absorption filtering material is adopted. It has compact structure and is easy for maintenance.
1.4 Options
1.4.1 Remote monitor
The Liebert_DM chilled water series cooling unit adopts the standard protocols of Ministry of Information Industry. For
details, please refer to Centralized Power Equipment, Air Conditioning and Environment Monitoring and Management
System for Communication Stations, Part III: Protocol for Front-end Intelligent Equipment. It realizes the
communication with the host computer through the RS485 port and is controlled by the host software. For details
about the monitoring software of Emerson, SiteMonitor, please refer to Appendix IV Introduction to SiteMonitor
Monitoring Software.
1.4.2 Energy-saving card
The Liebert_DM chilled water series cooling unit adopts external energy-saving card to monitor the maximum
temperature in the room. The energy-saving card is deployed in the place with large thermal load and high
temperature. This cooling unit can be equipped with up to 4 energy-saving cards. When the temperature values
measured by all the energy-saving cards are lower than the setting value of "sleep temperature", and only the internal
fan needs to run, if "sleep mode" is set as "enabled", the cooling unit will shut down the internal fan and enter the sleep
mode, so as to realize energy efficiency.
1.5 Environmental requirement
1.5.1 Operating environment
The operating environment shall meet the standards of GB4798.3-90. For details, please refer to Table 1-1.
Item
Installation
Ambient temperature
altitude
Operating voltage range
1.5.2 Storage environment
The storage environment shall meet the standards of GB4798.3-1996. For details, please refer to Table 1-2.
Item
Storage environment
Ambient humidity
Ambient temperature
Storage time
Table 1-1 Requirement of operating environment
Vertical installation, with the installation base ≥150mm
Indoor temperature: 4º C~40º C
Chilled water inlet temperature: 5º C~12º C
<1000m, derated when it is more than 1000m
3N~380V (-15%~+20%) , 50Hz
Table 1-2 Requirement of storage environment
Indoor, clean (free of dust)
5%RH~85%RH
-20º C~+54º C
No more than 6 months in total (transportation plus storage), performance needs to be reevaluated after
6 months
User Manual of Liebert_DM Chilled Water Series Cooling Unit
Requirement
Requirement
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