Full Installation of an Inverter Minisplit Heat Pump with Indoor Ceiling Cassette!

The video begins with Craig Migliaccio from AEC Service Tech introducing the installation process of a Cooper and Hunter ceiling cassette mini-split system. The system is being installed to alleviate the heat load on the existing HVAC system. Craig outlines the components, including the indoor ceiling cassette, outdoor unit, and the necessary brackets for mounting. He emphasizes the importance of precise measurements and secure mounting to ensure proper functioning of the system.

In this section, Craig discusses the process of mounting the indoor ceiling cassette. He explains the need to adjust the mounting brackets to achieve the correct distance from the drop ceiling and ensures that the ceiling plates and wall plates are securely fastened with appropriate nuts and bolts. Craig also highlights the importance of the nitrogen pressure test to confirm there are no leaks in the coil and provides a step-by-step guide on preparing and mounting the unit.

Craig proceeds to explain the measurement and connection of the line set, which includes the vapor and liquid lines required for the indoor and outdoor units. He details the process of rolling out the line set above the drop ceiling and preparing it for connection. Safety measures, such as checking for electrical wires and drilling the correct size hole for the PVC pipe, are also discussed to ensure a secure and leak-free installation.

This paragraph focuses on the crucial steps of tightening the connections and performing a pressure test on the system. Craig demonstrates how to properly tighten the flare nuts using a torque wrench and the correct torque values for both the vapor and liquid lines. He then explains the pressure testing procedure, emphasizing the need to monitor the pressure over a 10-minute period to ensure there are no leaks in the system.

Craig now discusses the preparation for charging the system with refrigerant. He explains the process of adding nitrogen to the system and conducting a pressure test to ensure there are no leaks. The importance of using a digital gauge for accurate pressure readings and applying a leak detector to all flare joints is highlighted to ensure a secure and efficient refrigerant charge.

In this part, Craig explains the vacuuming process to remove any air, water vapor, or nitrogen from the system before charging it with refrigerant. He details the use of a vacuum pump and the standing vacuum test to ensure that the system is free of contaminants. Craig then demonstrates how to break the vacuum with refrigerant and the calculation required to determine the correct amount of refrigerant to add to the system.

Craig moves on to the electrical aspects of the installation, detailing the process of connecting the indoor and outdoor units. He explains the importance of using the correct gauge wire, securing the connections with crimp connectors, and ensuring that all electrical components are safely and correctly installed. Safety measures, such as checking for voltage and using appropriate conduit, are emphasized to prevent any electrical hazards.

In this section, Craig focuses on the installation of the condensate line, which is crucial for the proper functioning of the HVAC system. He explains how to connect the line, ensure it is pitched correctly for drainage, and secure it with PVC fittings. Craig also discusses the importance of insulating the line set and condensate line to prevent any potential issues related to humidity or temperature fluctuations.

The final part of the video involves commissioning the system and testing its performance. Craig explains how to turn on the power to the outdoor heat pump unit and use the remote to control the system. He emphasizes the importance of checking the indoor delta T to confirm the correct refrigerant charge and ensure the system is operating efficiently. Craig concludes the video by summarizing the installation process and encouraging viewers to visit the website for more information on mini-split systems.