Full Installation of an Inverter Minisplit Heat Pump with Indoor Ceiling Cassette!
TLDRIn this informative video, Craig Migliachio from AEC demonstrates the complete installation process of a 12,000 BTU Cooper and Hunter ceiling cassette mini-split system. The video covers mounting the indoor unit above a drop ceiling, connecting the outdoor unit, and ensuring proper refrigerant charging. Detailed steps are provided for electrical connections, vacuuming the line set, and pressure testing for leaks. The installation is completed with a successful test run, showcasing the system's functionality and proper operation.
Takeaways
- 🏠 The video outlines a full installation process for a 12,000 BTU Cooper and Hunter ceiling cassette mini split system.
- 🛠️ The installation is being done to replace an existing HVAC system overwhelmed by heat load from a glass lobby area.
- 📐 Detailed measurements and positioning are crucial for mounting the ceiling cassette unit and ensuring it fits within the drop ceiling grid.
- 🔨 Special attention is given to securing the mounting brackets and ensuring the cassette unit is level and at the correct height.
- 🔧 The technician explains the importance of handling the line set, including the use of correct-sized tubing for vapor and liquid lines, and preparing for the installation of the outdoor unit.
- 💡 The installation includes a pressure test to ensure there are no leaks in the system after connecting the indoor and outdoor units.
- 🔌 The electrical connections are detailed, including the need for proper wire gauge, use of a fusible disconnect, and correct wiring for voltage and communication lines.
- 🌡️ A standing vacuum test is performed to ensure no leaks are present before breaking the vacuum with refrigerant.
- 💧 The condensate line is connected and insulated to prevent leaks and ensure proper drainage.
- 🔄 The system is tested for proper operation, including checking the delta T to confirm the refrigerant charge is correct and the system is functioning efficiently.
- 📚 The video provides a comprehensive guide suitable for various indoor unit types and further resources are available on the AC Service Tech website.
Q & A
What type of HVAC system is being installed in the video?
-A Cooper and Hunter ceiling cassette mini split system is being installed.
Why is the existing HVAC system being replaced?
-The existing HVAC system is getting overwhelmed by the heat load and heat loss from the glass in the lobby area.
What is the BTU rating of the installed unit?
-The installed unit has a 12,000 BTU rating.
What is the purpose of the nitrogen pressure test in the installation process?
-The nitrogen pressure test is used to check for any leaks in the system and ensure that the coil is holding pressure.
How is the ceiling cassette mounted in the drop ceiling?
-The ceiling cassette is mounted using brackets secured to the roof rafters and wall plates with nuts on both sides for stability.
What are the dimensions of the mounting area for the ceiling cassette?
-The dimensions from one side to the other are 23 inches.
What type of refrigerant is used in the system?
-R410A is the type of refrigerant used in the system.
How is the electrical connection made for the outdoor unit?
-The electrical connection is made using a 15-amp fusible disconnect and 12-gauge wire running through flexible conduit.
What is the purpose of the condensate line and how is it installed?
-The condensate line is used to drain the condensation produced by the unit. It is installed using a flexible connector and PVC piping, which is then insulated.
How is the system's performance checked after installation?
-The system's performance is checked by monitoring the indoor delta T, which is the change in temperature between the return and supply air.
Outlines
🛠️ Introduction and Overview of Installation Process
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.
🔨 Mounting the Indoor Ceiling Cassette
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.
📏 Measuring and Connecting the Line Set
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.
🔧 Tightening Connections and Pressure Testing
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.
💨 Preparing for Refrigerant Charging
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.
🌬️ Vacuuming and Charging the System
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.
🔌 Electrical Connections and Testing
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.
💦 Condensate Line Installation and Insulation
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.
🎯 System Commissioning and Testing
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.
Mindmap
Keywords
💡Inverter Minisplit Heat Pump
💡Ceiling Cassette
💡Outdoor Unit
💡Line Set
💡Pressure Test
💡Vacuum Pump
💡Refrigerant
💡Electrical Connections
💡Condensate Line
💡Installation Process
Highlights
Craig Migliachio from AEC discusses a full installation process of a Cooper and Hunter ceiling cassette mini split system.
The 12,000 BTU system is being installed to handle heat load from glass panels in a lobby area.
Ceiling cassette and outdoor unit components are introduced, along with the inverter heat pump technology.
Detailed measurements and mounting procedures for the ceiling cassette are provided.
Explanation of the use and importance of various brackets, wall plates, and nuts for secure installation.
Demonstration of how to properly handle and install line sets and communication wires above the drop ceiling.
Drilling and preparation for mounting the outdoor unit, including safety checks for electrical wires and wall hollowness.
Instructions on connecting the line set to the outdoor unit with flare nuts and proper torque values.
Conducting a nitrogen pressure test to ensure no leaks in the system and correct installation.
Explanation of the vacuuming process to remove air, water vapor, and nitrogen from the tubes.
Breaking the vacuum with refrigerant and charging the system with the correct amount for the line set length.
Electrical connections and safety measures, including proper use of flexible conduit and seal tight connectors.
Running the condensate line and ensuring a proper pitch for drainage with a clean out T.
Insulation of the line set and condensate line for optimal performance and to prevent condensation.
Powering on the unit and using a remote to control the system, with a focus on achieving the right temperature.
Checking the indoor delta T to confirm the correct refrigerant charge and system functionality.