Digital upgrade kits engineered for commercial applications are a modern advancement in the HVAC technology that allows end customers to enjoy enhanced humidity control, temperature control, and capacity modulation of their commercial HVAC system. A compressor upgrade kit allows you to give your clients precise control over multiple heating and cooling parameters that will grant them improved performance, convenience, and comfort.

The typical upgrade kit consists of a commercial comfort controller, as well as other parts required for its adequate installation. This includes the necessary copper tubing for a complete replacement of the compressor, the valve you need to add, as well as the thermistor and the coil required for the installation. The final part of the installation equipment is a networkable thermostat and controller. Now, let’s see how you should approach the installation procedure.

How do I install the upgrade kit?

AC compressors typically fail as a result of contamination (debris getting inside the mechanism) and oil starvation (system burns out due to inadequate lubrication). In either case, compressor replacement is the recommended solution.

Here’s how to replace your HVAC compressor:

Step #1: Identify compressor type and turn off electrical supply

Make sure you know which type of compressor you have before purchasing a replacement. Before installing a new unit, make sure to cut off electrical supply to prevent injury.

Step #2: Remove refrigerant and cut refrigerant lines

Open up the cooling system and remove all of the refrigerant. To comply with the current environmental protection protocols, pump the refrigerant into a storage cylinder rather than releasing it outside. Once this is done, cut refrigerant lines.

Step #3: Remove the compressor

Remove the hoses that are attached to the compressor. The standard compressor has a single bolt that connects it to the accessory bracket and the holding, so make sure to unbolt it before replacing it.

Step #4: Install the replacement compressor

Place the new compressor inside the condenser unit and mount it with the bolts. Reconnect refrigerant lines. Since new refrigerant needs to be added, it’s also recommended that you replace the coils and other controls.

Step #5: Reassemble the unit

Reconnect all the hoses and fully assemble the unit before reconnecting it to the power source. Test to see if everything is working correctly by turning on your AC.

What should I consider before installing the upgrade kit?

As a rule of thumb, you should always consult the official manual provided by the manufacturer before proceeding with the installation. If the manual isn’t available, keep in mind the following:

Compressor clearance

You should ensure there are at least two feet (24 inches) of clearance between the compressor/condenser unit and nearby obstructions such as shrubbery, fences, walls, and so on.

Air flow

A HVAC system can either be a horizontal, downflow, or upflow unit. Horizontal air flow allows you to place the unit anywhere in your home, but it may not be as efficient as the other type types. Downflow and upflow units are more efficient, but they have to be placed either in your attic or basement, respectively.

Controller wiring

Residential AC systems typically use relays that have 24-volt coils. Circuit boards or printed circuit boards found in modern ACs use 24-volt controls, which originate from the control transformer. Systems that don’t typically use 24-volt controls are window ACs, baseboard electric HVACs, and ductless mini-splits.

Following procedures and using safety equipment

Working as a HVAC technician carries some inherent risks. To ensure your and your coworkers safety, always wear protective gear (slip resistant shoes, respirator, eye protection, etc.) and use the right tools for the specific job at hand.

Always wear protective gloves when handling refrigerants and other toxic chemicals, and take steps to avoid electrical shocks, especially when dealing with HVAC systems that have water leaks.