Resources

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

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

The APR Control directly saves power by reducing the lift of the compressor. Because the APR Control is a modulating external unloader, it diverts refrigerant around the compressor. 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