Vertiv | Liebert CRV+ | User Manual 7
1.3.6 Electric Heater
In the CRV+ models, the PTC heaters are used 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
1.3.7 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 levels of defined standards, the color changes, thereby,
indicating irregularity in the moisture content.
1.3.8 Filter Drier
Moisture can adversely affect the operations and service life of a system in the refrigeration lifecycle. In
order to rectify that condition, filter driers are used to filter out particles, remove, and hold moisture to
prevent it from circulating through the system.
1.3.9 Micro-Controller
The Micro-Controller used in CRV+ provides a simple operational user-interface and is developed using
the latest and highly advanced PID regulation technology.
Multilevel Password protection
Self-recovery upon power failure, high-voltage & low-voltage protection
Phase loss protection
Automatic phase-sequence switching upon the anti - phase and rotate speed control of the
outdoor fan
High-end Fault diagnostic system to facilitate easy equipment maintenance
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