Control the Environment

The System controls the room environment by engaging one of four modes: Cool, Dehumidify, Reheat, or Humidify. These modes may work differently depending on the options and equipment installed in the Modules.

Note: The environmental controls are set when your System is installed. Making changes to the settings described in this section after the System has been commissioned may result in improper operation.

How the modes work

DX Cool. Cool mode output is determined by the difference between the setpoint and the average return air temperature of each of the Modules in the System (if more than one Module is present). The deadband is used to engage the compressors incrementally with increasing demand. Each compressor in the System is assigned an equal division of the deadband. As the average return temperature rises above the setpoint, a compressor is engaged. If the average return temperature reaches the setpoint plus the entire deadband, all of the compressors will be engaged. As the temperature drops through each increment of the deadband a compressor will be disengaged. When the temperature drops below the setpoint the remaining compressor will disengage.

See “Deadbands” on page 34 for instructions on setting the DX cool deadband.

Fluid Coil Cool. When the cool mode uses a MultiCool or Economizer coil, the output is determined by the difference between the setpoint and the average return air temperature of each of the Modules in the System (if more than one Module is present). The Proportional plus Integral plus Derivative (PID) control loop calculates the output as demand increases and opens the valve controlling the flow of coolant into the coil. As the average return temperature increases, the output will increase until it reaches 100 percent of capacity. For Modules with an Economizer coil, one stage (compressor) of DX cooling can be engaged per Module to help meet the demand. The rule for engaging the compressor is the same as for DX cool.

See “PID controls” on page 38 for a description of the PID controls and see “How to tune the PIDs” on page 38 for instructions on tuning the fluid coil PID loop.

Reheat (Electric SCR). The silicon controlled rectifier (SCR) electric reheat function is controlled by the reheat PID controller. When the return temperature of the Module drops below the reheat setpoint, the reheat output will increase as the return temperature drops until output reaches 100%.

See “PID controls” on page 38 for a description of the PID controls and see “How to tune the PIDs” on page 38 for instructions on tuning the reheat PID loop.

NetworkAIR FM DX 60 Hz Operation, Maintenance, and Troubleshooting

31

Page 40 Page 42
Page 41
Image 41
American Power Conversion FM, DX manual Control the Environment, How the modes work
Page 40 Page 42

DX, FM specifications

The American Power Conversion (APC) DX,FM series represents a cutting-edge solution designed for critical power management and uninterruptible power supply (UPS) applications. Aimed at businesses and data centers that require robust power protection, this series balances high-performance capabilities with advanced technology features.

One of the key distinguishing features of the DX,FM series is its modular design. This allows users to scale their UPS system according to their needs, making it suitable for a variety of environments. Whether you're managing a small server room or a large data center, the modular architecture ensures that you can add or remove capacity with ease. This flexibility not only optimizes initial investments but also supports future growth seamlessly.

The series employs advanced battery technology, which extends battery life and enhances overall performance. With intelligent battery management systems, the DX,FM ensures that battery health is monitored in real-time, preventing premature failures and unnecessary replacements. This leads to reduced maintenance costs and maximizes uptime.

Additionally, the DX,FM series features innovative cooling solutions that enhance performance in high-density situations. Efficient thermal management reduces the risk of overheating, keeping valuable equipment operating optimally. This is particularly crucial in data centers where heat generated by servers can create potential disruptions.

Another significant characteristic of the DX,FM series is its sophisticated monitoring and management capabilities. Integrated with state-of-the-art software, users can gain remote access to their UPS units, enabling real-time tracking of performance metrics. This remote monitoring capability allows administrators to proactively manage power usage and ensure that systems are operating within safe parameters.

Furthermore, the DX,FM series is designed with a high level of redundancy. This built-in reliability feature ensures that if one unit fails, others can seamlessly take over, maintaining power supply continuity. This is critical for mission-critical environments where power outages could result in substantial financial losses or data loss.

In summary, the American Power Conversion DX,FM series incorporates modularity, advanced battery technology, effective cooling solutions, and sophisticated monitoring features to deliver an ideal power management solution for various organizations. Its design prioritizes flexibility, reliability, and efficiency, making it an essential investment for any business looking to safeguard its operations against power disruptions.
Top Page Image Contents