Vertiv | Liebert® DM | User Manual 65
Start-up Commissioning
Restore the temperature setpoint to the default or the original value after the test.
4.2.2. Heating
Adjust the temperature setpoint to 5 °C (10 °F) higher than the indoor temperature. Then the control system triggers the
heating demand signal and the heater starts to work. Adjust the temperature setpoint to 5°C (10°F) lower than the indoor
temperature. If the heater stops working, it means that the heating function is normal. Refer Section 5.4.3 (Temp/Hum) for
better understanding.
Restore the temperature setpoint to the default or the original value after the test.
4.2.3. Humidifying
Adjust the humidity setpoint to 10% higher than the indoor relative humidity. Then the control system triggers the
humidifying demand signal and the humidifier starts to work. Adjust the humidity setpoint to 10% lower than the indoor
relative humidity. If the humidifier stops working, it means that the humidifying function is normal. Refer Section 5.4.3 (Temp/
Hum) for better understanding.
Restore the humidity setpoint to the default or the original value after the test.
4.2.4. Dehumidifying
Adjust the humidity setpoint to 10% lower than the indoor relative humidity. Then the control system triggers the
dehumidification demand. Note that during the testing process, if the indoor temperature is 3 ºC higher than the
temperature setpoint, the system may enter in ‘Forced Cooling Mode’ and the dehumidification demand will not be
responded. Refer Section 5.4.3 (Temp/Hum) for better understanding.
Restore the humidity setpoint to the default or the original value after the test.
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