Inomax low voltage VFD solution for HVAC applications

Inomax VFDs are widely application for HVAC systems.

Benefits of Using Inomax VFDs in your HVAC Systems

Energy Saving:

VFDs ensure that AC motors in an HVAC system can operate at less than full speed, which leads to considerable reductions in energy consumption. According to the Affinity Laws for centrifugal fans and pumps, reducing the HVAC motor speed by 25% lowers the motor’s energy consumption by approximately 60%. Likewise, decreasing the speed of a motor driving a pump or fan in an HVAC system by 50% reduces the motor’s energy usage by almost 90%. The bottom line is, that using Variable Frequency Drives to reduce the speed of AC motors in an HVAC system by even a small percent can bring about significant energy savings.

Extended Service Life:

As a commercial HVAC system continues to operate, its components will normally start to wear down over time, and the motors driving its fans, compressors, and pumps are no exception. Without frequent maintenance, those components can deteriorate to the point where the entire HVAC system malfunctions or stops working completely. While equipping an HVAC system with a VFD won’t stop the system from aging (declining in functionality over time), it reduces wear and tears on the HVAC motors. This is due to the fact that Variable Frequency Drives allow induction AC motors to complete a “soft start” and gradually ramp up to full-load operating speed.

Precise Control Levels:

VFDs provide more precise levels of control to HVAC systems in building applications. For example, high-rise commercial buildings often use a domestic water supply with a booster pump system to maintain adequate water pressure at all floor levels of the building. Conventional booster pump controls in such types of HVAC applications can maintain the water pressure within a specific range.

However, a VFD-based booster pump control system for a similar application can maintain precise water pressure control over a wide range of water flow rates, while reducing the energy requirements of the pump system as well as pump wear & tear. Also, for a VFD-equipped HVAC compressor used in a chiller plant, the VFD often modulates the compressor speed to maintain the temperature set point of supply air or supply water.

Improved Ventilation:

VFDs adjust the speed of HVAC motors driving pumps, compressors, or fans to vary system airflow. This makes them essential components in controlling the rate of airflow in HVAC systems to create healthy and safe buildings–in terms of environmental comfort. In addition, the quality of indoor air is improved because controllers of VFD-equipped HVAC systems do respond to precise control temperature, pressure, carbon dioxide, and humidity levels in buildings.

A Single VFD Controlling Multiple HVAC Motors,save cost

Fault Detection and Diagnosis (FDD) Analysis: Although Variable Frequency Drives are widely used in AC motors driving pumps, compressors, and fans in HVAC systems, most of these applications focus on how to use a VFD to control the speed of HVAC motors. Nevertheless, a VFD can be used to measure useful electrical-related parameters such as current, frequency/speed, power, torque, etc. These parameters can then be used to monitor the HVAC system and for Fault Detection and Diagnosis (FDD) purposes. FDD analysis is an effective technique for improving the reliability of HVAC systems and reducing maintenance costs.