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STDITR01ADP2090EV TECNOFRIGO TUSCANY srl
Adjusting the air flow
General information.
For optimal performance, you must adjust the flow of process and reactivation air as a function of
nominal air flows. You can set the airflows in the display of the control system without using dampers, if
there are frequency converters inside the electrical panel.
Contact TFT for advice on installation and settings.
NOTE! Software settings and frequency converters are configured at the factory. The
control range of frequencies is limited so as to correspond to an acceptable speed fan
acceptable.
CAUTION! Danger due to rotation - to prevent access to the rotor of the fan, the
dehumidifier must operate exclusively with wet and dry air ducts connected, or an
appropriate safety equipment -such as protective grilles- must be installed
CAUTION! If airflows are not adjusted properly, a malfunction of the unit could happen.
Damage to the unit due to a wrong adjustment of airflows could void the warranty of the
unit.
The airflows should never be set to values higher than the nominal air flow. If you need
higher air flow, contact TFT.
Airflow process
Follow the instructions listed below, to regulate the flow of process air.
Control of the process air fan at a fixed speed by ΔP
1. Start the dehumidifier and made it run at full speed.
2. Connect a differential manometer between the process air inlet (+) and the process air output
(-).
3. Compare the measured differential pressure with the calculated value of the factory.
4. Adjust the control point of the process airflow in the control system acting on the frequency
converter or through the damper, so that the differential pressure value measured corresponds
to the calculated value of the factory.
Control of the process air fan at a fixed speed by airflow
1. Start the dehumidifier and made it run at full speed.
2. Measure the airflow of a duct section by a linear anemometer.
3. Compare the measured air flow rate with the nominal one.
4. Adjust the control point of the air flow in the process control system acting on the frequency
converter or through the damper, so that the value of the air flow rate measured corresponds
to the nominal value.
Reactivation airflow.
Follow the instructions listed below, to regulate the flow of the regeneration air.
1. Start the dehumidifier and make it run at full capacity for at least 10-15 minutes to allow the
heater of the regeneration air to reach the normal operating temperature.
2. Measure and record the temperature in the input reactivation air intakes.
3. Read the temperature of the reactivation air in the display of the control system. The difference
between the temperature of the reactivation air and the inlet temperature of the reactivation air
must be about 95°C (with a tolerance threshold ±5°C).
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