Product Overview
Vertiv | Liebert CRD10 | User Manual 10
1.6.4
Electronic Expansion Valve (EEV)
The EEV is designed for modulating control of the refrigerant mass flow with precision. The EEV simultaneously
collects temperature and pressure signals regulate the refrigerant flow accurately. The EEV’s wide operating
envelope also lowers down the condensing pressure, thereby resulting in significant energy savings.
• Designed for modulating control of the refrigerant mass flow with precision
• Ensures effective control on super-heating at the end of the evaporator
• Better low load capacity
• Designed for easy Installation-and-Service. Figure 1-8 shows the image for the EEV used in the CRD10
models.
Figure 1-8 Electronic Expansion Valve
1.6.5
Electric Heater
In the CRD10 models, the PTC (Positive Temperature Coefficient) heater is used on models equipped with
reheat, as they have lower running temperatures, thereby ensuring operational safety.
• Less susceptible to overheating and long lasting due to less wear
• Lower Maintenance and smooth operation, Figure 1-9 shows an image of the electric heater.
Figure 1-9 PTC Heater
1.6.6
Sight Glass
The sight glass is a utility for observing the refrigerant state; specifically, the moisture content of the system. If
the moisture content exceeds the defined standards, the color changes, thereby, indicating irregularity in the
moisture content.
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