APR Control vs. Digital Scroll & Other Variable Speed Technology Engineers, Technicians & Contractors are curious about how the APR Control compares to similar technologies that provide system compressor and capacity modulation. This page shows the similarities and differences of Digital Scroll Compressors, VRV or VRF Systems cost, performance,… Read More
Your typical air conditioning system and control sequence… Air conditioning systems are primarily on/off devices of a fixed capacity, controlled by the limits of the thermostat. A standard thermostat, when set at 72°F (with +/- 1°F range), will turn the air conditioning on at 73°F and cool the space, at… Read More
Air Conditioning isn’t about temperature control, it’s about removing humidity from the air. Dehumidification is arguably much more important in order to maintain a comfortable space! Without a properly sized air conditioning system, it’s going to be impossible to control the relative humidity in the space. Read More
Many applications, including surgery suites, clean rooms, high-precision manufacturing, etc., have tight temperature and humidity requirements that can benefit from the addition of the apr control. By providing continuous capacity modulation to match changing load conditions, the apr control has helped correct many under-performing systems. Read More
Optimization is only possible with the power of DX modulation. Modulation to match changing load conditions reduces or eliminates cycling. There is a wide range of studies recognizing that increasing the runtime by just 4 minutes (from 5 to 9 minutes after start) can improve the efficiency up to 17% Read More
Rawal Devices manufactures the APR Control & APR-E Valve in many different sizes for a variety of refrigerants APR Model # Modulation Capacity APR-410-1 1.5 tons APR-410-2 2.5 tons APR-410-3 3.5 tons *APR-410-5 5.5 tons APR-410-6 6.5 tons APR-410-10 10 tons APR Control Application Example System Tonnage 5 Tons 5… Read More
The concept of Optimization has become prevalent in the HVAC industry. It is an agreed upon term that refers to controlling the HVAC systems to provide the necessary amount of cooling to maintain building comfort demands at energy efficient levels to utilize the least amount of power consumption. Read More
The Oak Ridge Center for Manufacturing Technology performed a series of energy efficiency testing of the APR installed on the lead 6.25 ton stage of a 12.5 ton Trane self-contained air conditioner at their facility. Read More
APR Control Compressor Power Consumption Testing Parameters An HVAC equipment manufacturer conducted a test in their state-of-the-art testing facility to assess the direct energy-saving benefits of utilizing the APR Control at part load conditions. Original equipment performance parameters: 10-ton rated at AHRI 210/240 Two 5-ton stages… Read More
The APR Control Enhances Heat Pumps In the case of heat pumps, you have to prioritize capacity for either cooling or heating. If you are prioritizing and sizing for the heating load, the result will often be excess cooling capacity. The APR Control will… Read More
Rawal Devices proudly offers Free, Live, online webinars to educate you, your service & sales team, as well as your customers on the APR Control. Below are a variety of trainings we offer regularly. We can also provide completely customizable trainings, just feel free to contact… Read More
