Abstract: Legacy single speed fans are converted to variable speed fans configured to operate at reduced speeds. A conversion controller operates in conjunction with the existing controller. The conversion controller is configured with a 24 volt digital input module and a 0-10 volt analog output module. The input module is electrically connected to the 24v AC output signal wires from the existing controller. The input modules are also configured with a fan quantity selection switch to input the actual quantity of 24v AC signals for fans. The conversion controller registers the quantity of 24v AC contact signal inputs received from the existing controller, compares it to the fan quantity selected on the fan quantity selection switch, and sends a signal to the variable speed fans. The output modules are electrically connected to variable speed fan signal inputs.

Abstract: Legacy single speed fans are converted to variable speed fans configured to operate at reduced speeds. A conversion controller operates in conjunction with the existing controller. The conversion controller is configured with a 24 volt digital input module and a 0-10 volt analog output module. The input module is electrically connected to the 24v AC output signal wires from the existing controller. The input modules are also configured with a fan quantity selection switch to input the actual quantity of 24v AC signals for fans. The conversion controller registers the quantity of 24v AC contact signal inputs received from the existing controller, compares it to the fan quantity selected on the fan quantity selection switch, and sends a signal to the variable speed fans. The output modules are electrically connected to variable speed fan signal inputs.

Abstract: Accurate measurement and monitoring of a computer room air conditioning unit's cooling production, distribution, and consumption is necessary to optimize effectiveness and efficiency and minimize redundancy. A mass air flow monitoring device comprises an array of sensor modules and a controller module with display, user interface, and I/O for third party connectivity. The device monitors temperature, pressure, water content, and quantity of airflow in a CRAC's supply air stream and return air stream and compares the two measurements to determine the amount of energy, or enthalpy, put into or taken out of the air. The result, displayed in watts, allows for the efficient control of production, distribution, and usage of supply air from the CRAC unit. Over or under provisioning can be quickly identified and corrected and, when used in conjunction with power consumption monitoring, a “watts of cooling for watts of power consumption” efficiency metric can be provided.

Abstract: Accurate measurement and monitoring of a computer room air conditioning unit's cooling production, distribution, and consumption is necessary to optimize effectiveness and efficiency and minimize redundancy. A mass air flow monitoring device comprises an array of sensor modules and a controller module with display, user interface, and I/O for third party connectivity. The device monitors temperature, pressure, water content, and quantity of airflow in a CRAC's supply air stream and return air stream and compares the two measurements to determine the amount of energy, or enthalpy, put into or taken out of the air. The result, displayed in watts, allows for the efficient control of production, distribution, and usage of supply air from the CRAC unit. Over or under provisioning can be quickly identified and corrected and, when used in conjunction with power consumption monitoring, a “watts of cooling for watts of power consumption” efficiency metric can be provided.