Munters MCD100E - Setting the Rated Airflows; Readjusting the Airflow

CAUTIO N!
Failure tocorrectlyadjusttheairflows cancausemalfunctionofthe unit.
Anydamageto the unitresulting fromincorrectadjustment oftheairflowscaninvalidatethe warrantyof theunit.
Theairflowsmustneverbesetabovetheratedairflows. If higher airflows arerequested,consultMuntersfor
verification.
4.2.2 Settingtheratedairflows
Process fan control with fixed speed
1. Calculate the cor responding differential pressures for the actual process and reactivat ion airflows. Use
the formula and the fan coefficients in section 4.2.4, Base configuration settings.
2. Start the dehumidifier and run at full effect.
3. Connect a manometer to the pressure nipple on the proces s f an. Measure and record the differential
pressure.
4. Compare the measured differential pressure w ith the calculated value.
5. Adjust the set point for the process airflow in the control system so the measured differential pressure
value corresponds to the calculated value.
6. Connect the manometer to the pressure nipple on the reactivation fan. Repeat the procedure in step 3–5
to set the actual reactivation airflow.
7. Continue with the p r o cedure in section 4.2.3 Readjusting the airflow.
NOTE!
Theactual airflowisdependantonthe temperatureatthe fanoutlet.
Process fan control w ith variable speed
1. Start the dehumidifier and run at full effect.
2. Set t he required process airflow in the control system.
3. Measure the actual process a irflow external to the dehumidifier using exter nal, calibrated test
equipment.
4. If necessar y, adjust the set point for the process airflow in the c ontrol system.
5. Set t he required r eactivation airflow in the control system. Repeat the procedure in step 3–4 to set the
actual reactivation airflow.
6. Continue with the p r o cedure in section 4.2.3, Readjusting the airflow
4.2.3 Readjustingtheairflow
1. Run the dehumidifier at full effect for 10 minutes to allow the reactivation heater to reach its normal
operating temperature.
2. Measure and record the temperature in the reactivation air inlet.
3. Read the reactivation temperature on the control system display. T he difference between the
reactivation temper ature and the temperature in the reactivation air inlet must be 95 °C with tolerance
limit ±5 °C.
4. If the temperature difference is outside the tolerance limit of ±5 °C, adjust the reactivation fan setting in
the control system. Let the temperature stabilise after each adjustm e n t.
26 Commissioning 190TEN–106 5–J 1408