Vertiv | Liebert PEX4 | User Manual
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Product Overview
Figure 1-6 Electrode Humidifier
1.5.2. Electrical Heating
In the PEX4 models, the PTC (PTC= Positive Temperature Co-efficient) heaters are used and it features
with fast temperature rising speed, automatic regulation of air temperature and power consumption. Its
calorific value not only maintains Dry Bulb Temperature but also compensates temperature drops due to
dehumidification. The lower surface temperature of the heater prevents the air from being ionized, thereby
extending the service life. The 1-stage heater capacity is 9 kW for models P1035 to P1060 and 12 kW for rest of
the models; for 2-stage, it is 18 kW & 24 kW. The material used for heating is metal. The safety devices, used in
the reheater are two automatic reset Overheat Switches and one manual reset Overheat Switch.
No. Description
No. Description
1
Zero line (blue)
5
Live line (red)
2
Temperature controller soleplate
6
Temperature controller soleplate
3
Live line (red)
7
Live line (red)
4
Temperature controller soleplate
Figure 1-7 Electrical Heater
