Installation procedures for HVAC systems can vary depending on the type of system being installed and the specific needs of the building or space being served. However, there are some common steps and considerations that apply to most HVAC installations.

1. Site Preparation: Before the installation process can begin, the site must be prepared. This includes clearing the area of any obstacles or debris, preparing the base for the equipment, and ensuring that all necessary permits and approvals have been obtained.
2. Equipment Placement: Once the site has been prepared, the equipment can be brought in and positioned. This includes placing the outdoor unit, installing ductwork, and positioning indoor units.
3. Electrical and Plumbing Connections: Once the equipment is in place, it must be connected to the electrical and plumbing systems. This includes running wires and cables, connecting the refrigerant lines, and connecting to the water supply.
4. Testing and Balancing: Once the system is installed, it must be tested and balanced to ensure that it is functioning properly. This includes testing the airflow, checking the refrigerant levels, and verifying that all electrical connections are secure.
5. Start-up and Commissioning: After the testing and balancing are complete, the system can be started up and commissioned. This includes checking the operation of all components, verifying that the system is meeting the design requirements, and making any necessary adjustments.
6. Maintenance: Once the system is up and running, it must be maintained to ensure that it continues to operate properly. This includes regular inspections, cleaning, and replacing filters as necessary.

It is important to note that HVAC installation should always be performed by a licensed and experienced professional. Improper installation can result in poor system performance, safety hazards, and increased energy consumption.