Vertiv | Liebert XDH | User Manual
4
Product Overview
1.4.3.Electronic Expansion Valve (EEV)
The unit is incorporated with an electronic expansion valve that simultaneously collects temperature and
pressure signals to accurately regulate the refrigerant flow. The EEV can ensure that refrigerant flow is evenly
distributed throughout the system. The EEV’s wide operating envelope reduces the condensing pressure,
thereby resulting in significant energy savings.
1.4.4.Air Filter
Air filter acts as a protective barrier within the cooling space for solid contaminants such as dust and dirt.
XDH is equipped with a specifically designed air filter with a high filtration efficiency capable of filtering the air
impurities and dust.
1.4.5.Filter Dryer
A filter dryer is installed in the refrigerant line to effectively extract any water/ moisture and impurities present
in the system while the unit is operational for a long term. It prolongs the operational life and also ensures the
normal operation of the system.
1.4.6.Drainage Pump
The XDH unit is equipped with a drainage pump that uses a brushless DC pump with a power module. The
rated voltage is 220 V ac. The operational logic of the pump is designed to support idling and overload
protection which ensures timely discharge of condensate water quickly.
1.4.7.Microprocessor Controller
The XDH precision air conditioner is equipped with a Vertiv microprocessor controller that functions on the
advanced PID regulation technology. Microprocessor controller has a display resolution of 240
×
128 pixels (small
display: 128×
64, large display: 240
×
128) with a blue back-light (small display: white color back-light, large display:
blue color back-light) color screen. The user interface is simple and integrated with a multi-level password
protection which can effectively prevent unauthorized operation. The controller features protective functions
of self-recovery upon power failure, high-voltage & low-voltage protection. The operation times of main
components are available through the menu.
The fault diagnostic system at the expert level can automatically display current fault information, facilitates
easy maintenance and can store up to 400 records of history events. The controller is configured with the
RS485 port and standard communication protocol of Ministry of Information Enterprise (Industrial Standard
MODBUS Protocol).
1.4.8.Power Module
The XDH unit is equipped with a highly efficient power module with minimum electrical losses. The unit
has built-in two power modules as a back up to each other to ensure seamless operation, thereby providing
reliability and stability to the system.
