2.4.3 EnergyRecoveryPurge
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Figure 2.4 Principle for Energy Recovery Purge
1. Reactivation air
2. Heated reactivation air
3. Wet air
4. Process air
5. Dry air
6. Purge air
7. Warm purge air
Energy Recovery Purge (ERP) is an energy saving solution that recycles heat from the rotor, after the
reactivation section in the rotational direction of the rotor. A minor part of the reactivation airflow is
bypassed to the warm sector of the r otor, before the airflow enters the r eactivation heater. The airflow
is heated up by the rotor and then mixed with the reactivation airflow, after the reactivation heater. The
recycled heat from t he rotor increases the efficiency and r educes the energy consumption.
Compared to a standard unit, ERP will give the same dehumidification capacity with reduced reactivation
heater energy.
2.5 Hightemperaturecut-out
The unit is equipped with a high temperature cut-out (HTC O), which prevents the unit from being
overheated and damaged if the reactivation air is too hot. T he HTCO switches off the heater if the
temperature exceeds the HTCO setting.
The HT CO t herm ostat housing is located beside the electrical panel, see Figur e 2.5 . A resetting button
is located on the back of the thermostat housing.
The HTCO bulb is located in the reactivation air duct. When the HTCO trips, the message "React Heater
HTCO" is shown on the control panel display.
Figure 2.5 HTCO position
190TEN–106 5–J1408
Dehumidifierdesign
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