How to adjust the Rawal APR Control Valve

Adjust the APR Control to Optimize DX Performance

For years, the APR Control has been known as a “set-it and forget-it” solution for capacity modulation throughout the HVAC industry. For most standard DX comfort cooling applications, the factory setting of the APR will solve the problem and typically does not require adjustment. However, the APR Control is by no means a one-size fits all solution. Every job or application is unique, and it is completely adjustable if the runtime is inadequate or low load operation fails to cause suction pressure to fall low enough (the point at which the APR Control starts to open). Read more to find out how to determine if the APR Control requires adjusting and learn more about the adjustment process. You will learn how to adjust the APR Control® Compression Ratio Reduction valve to gain the maximum performance from your DX system.
APR Control maintains temperature and humidity levels in cleanrooms environmentsRawal Devices, Inc. 2023

Maintaining Temperature and Humidity Levels with the APR Control in Controlled Environments

In any controlled environment avoid equipment off-cycles so you don’t “lose the room!” Maintaining tight temperature and humidity levels in controlled environments such as cleanrooms is critical to prevent material damage, production loss, and shutdowns. Installing the Rawal Devices’ APR Control can be the perfect, cost-effective solution to avoid any interruptions in production as a result of the failure to maintain quality. Here's how...
APR Control mounted in a packaged rooftop hvac unit.Rawal Devices, Inc. 2022

Installing the APR Control: Everything You Need to Know

Installing the APR Control is straight-forward and doesn’t take a lot of guesswork from the technician. It is common for HVAC technicians who are unfamiliar with the APR Control to be intimidated by the installation process. The truth is, once the APR Control is installed, we often hear how much service technicians love the APR Control as a tool having to solve common HVAC challenges. Let’s address all the commonly asked questions and concerns about installing the APR Control valves. We also have a new installation video available to help you prepare and install the APR Control as seamless as possible!
Indoor Cannabis Grow Room HVAC

Meeting Cannabis Grow Room HVAC Challenges

Mechanical HVAC systems can be the greatest limiting factor or the greatest opportunity to maximize productivity and profits in the indoor Cannabis Cultivation Industry. Those involved in HVAC for Cannabis design, service, and operations are realizing that undersized or oversized systems from inaccurate load calculations for a given room lead to major challenges. The lack of traditional funding for cultivators is a key contributor to underperforming HVAC design choices leading to poor crop yield and ultimately – Less Profit! Rawal Devices has seen poorly designed, and underperforming cultivation facilities that were in desperate need of control improvements without replacing the equipment. The APR Control will provide the perfect solution to improve both existing and new air conditioning equipment performance and reliability. Rawal Devices has modulating technology, both mechanical and electronic, that transforms standard systems into variable capacity systems. This is critical for growing cannabis! With the APR’s ability to provide capacity modulation and precision discharge air control, your units will be able to meet ever-changing room criteria to maximize your plant yield and your customers’ profits!

Common Problems Associated with Oversized DX Air Conditioning Systems

Diagnosing or troubleshooting your customer’s air conditioning unit can be a daunting task, which can take up a lot of your time and potentially deplete your warranty reserve. One of the most overlooked issues is having too much cooling capacity as most commercial DX air conditioning systems are oversized for most of the year. As a result, you will likely experience: Short Cycling, higher than desired humidity levels, varying and uncomfortable space temperatures, potential coil freezing and more. If you’re experiencing any of these issues, we have a solution for you and your customers! The APR Control!
APR vs Hot Gas Reheat Comparison Table

The In-Stock Solution for Hot Gas Reheat Applications!

Rawal Devices understands there are a multitude of reasons why customers request a system with Hot Gas Reheat (HGRH); such as the need for additional dehumidification capabilities that off the shelf equipment cannot provide. Although hot gas reheat has been a common method to achieve design goals including dehumidification and temperature control, the APR Control is often a less expensive preferred design solution. There are plenty of projects that can be successful with just the APR Control’s continuous capacity modulation capabilities.