Product functions features :
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Fan control (EC fan or inverters) based on pressure (condenser) temperature (aerorefrigerant) or external voltage (0-10V) signal.
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Spray control according to the fan speed and the ambiant temperature
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Function to maintain the fan speed when spray is active.
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Set point management: fixed , offset on external signal, floating set point
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Alarm management : fan monitoring , sensors failure detection and temperature threshold alarms.
Available operating modes :
Aerorefrigerant : coil outlet temperature control
Condenser : condensing pressure of a refrigerant in the heat exchanger
Analog controller (0-10V) : control is driven by an external voltage signal [from the rack controller].
Fans and spray are controlled by the device.
Analog controller and Modbus: same as above. Fans are controlled by Modbus
Selecting the control mode activates the mandatory inputs and outputs for a standard application.
Optional settings are available to fit the device to particular functions.
Fan control via modbus
The control of the EbmPapst fans (only) via Modbus enables an individual control of each fan with additional functionalities.
Coil cleaning command :
This function helps to keep the coil free from dust and other dry and non-clogging impurities, leaves, etc… Fans are driven reverse at maximal
speed. This function does not replace coil periodic maintenance.
Parameters:
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Enable cleaning function :
Parameter [xx]
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Cleaning time :
Parameter [xx]
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Cleaning time interval :
Paramètre [xx]
This option is automatically enabled with spray control, active parameters are:
Parameters:
•
Cleaning time :
Parameter [xx]
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Cleaning time interval :
Paramètre [xx]
Overspeed function :
Maximum fan speed can, in certain circumstances (heat wave) exceed the maximum speed parameter[xx] to fulfill temporary plant request,
especially during summer. Maximum speed will never exceed maximum manufacturer allowed value.
•
Enable overspeed :
Parameter [xx]
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Maximum overspeed :
Parameter [xx]
•
External temp. threshold :
Parameter [xx]
•
Gas-cooler outlet temp limit :
Parameter [xx]
