Proper maintenance is essential for ensuring the reliable and efficient operation of a centrifugal chiller. In this video, we'll cover the procedures involved in evaluating performance, as well as maintenance on a chiller and help you ensure that it operates at peak performance for years to come. This course will get you thinking and acting like a pro when it comes to maintaining centrifugal chiller systems.

In this simulation-based course, you'll discover how to replace existing systems, and commission new systems, with cold climate heat pumps. Depending on your location, cold climate heat pumps might be needed because they can operate at lower outdoor ambient temperatures. It includes video demonstrations from your instructor Tim Smith where we will walk you through the basics, and then you'll have the opportunity to test your skills with challenge scenarios.

In this simulation, we'll learn the fundamentals of commercial wiring troubleshooting. We'll do this by pinpointing issues with branch circuits, general lighting, power distribution, and emergency lighting. In your virtual toolkit, you'll make use of tools and diagrams, and you'll perform tests, make observations, and diagnose the root cause of various issues. You'll perform this work safely, while adhering to standards set forth by the National Electric Code.

This is an assessment simulation, where you'll use the steps and skills you've learned and practiced on the Interplay platform to determine the fault and fix each scenario. Use the bottom tool bar to navigate around the environment, inspect components, access tools, and view diagrams. This is designed to mimic a real-world scenario, so there's no step by step guide giving you instructions for how to troubleshoot the scenario.

Ongoing maintenance of the Air Handling Unit (AHU) is essential to the proper functioning of the CHVAC system. AHUs condition and distribute air throughout a commercial building. They move the required volume of air through an enclosed space while maintaining humidity and air cleanliness. A CHVAC engineer custom designs each AHU for a specific application. So, the particular configuration will vary from space to space. However, certain maintenance requirements are common to all units. In this course, we will learn the types and frequency of AHU maintenance. We’ll identify the most common signs of wear, and demonstrate procedures that prevent them from growing into major problems. We’ll explain the risks of working with dirty filters, belts, and high voltages. We’ll identify what steps the HVAC technician must take to stay safe. We'll apply these concepts by performing maintenance on a virtual air handler unit in a computer simulation.

This course on Distracted Driving is designed to educate drivers on the dangers of distracted driving and to provide them with strategies to avoid distractions while driving. The lessons within will provide drivers with information on the different types of distractions, and tips on how to minimize or eliminate distractions while driving.

Have an interest in installing asphalt shingles, then this is the course for you! In this course you'll learn where finishing a roof fits into the overall construction process. You'll also learn about safety requirements, the tools and materials needed, followed by some common terms and techniques used for roofing. Lastly, you'll learn the steps on how to install asphalt shingles on a roof. We hope you enjoy this course!

In this lab, you will put into practice the knowledge and concepts from Introduction to Fire Alarm Systems. Using interactive simulations, which give you feedback at each step along the way, you will visit the virtual law firm of Smithers & Abebe, which is expanding into the 3rd floor of the 3-story office building they occupy. You will install fire alarm system components professionally and “up to code.”

Learn about trussed rafters and how a trussed rafter roof is constructed. In this course you'll learn the major framing members of a trussed rafter system and the bracing used to safely install trusses on a gable shaped roof.

In this course on Garbage Disposal Troubleshooting, we will explore the troubleshooting and replacement tasks of a garbage disposal. With each scenario, you will be guided with simulation based steps to check for key signs of different inoperable states that may occur with the garbage disposal system. From electrical and mechanical failures to eventual replacement, you will learn and participate with the important troubleshooting procedures to its completion.