It’s spring, which means it’s maintenance time for all of us HVACR pros. You should start scheduling appointments to give every system that we service a thorough check. Make sure to give a spring check-up to each of your customers as this regular maintenance keeps their warranties up-to-date and helps diagnose small problems before they become big ones. And don’t forget before you head out to all of your appointments to make sure you have all of the HVACR tools needed to service your customers.
As you know, these check-ups start with simple visual checks like cleaning the evaporator coils and drain lines and changing air filters, as well as clearing leaves and debris from around outside units and inspecting and straightening the condenser fins.
But your spring check doesn’t stop there. After your visual inspection, you should thoroughly inspect every part of the system. For starters, test airflow through the system. Airflow is everything, and it’s important to inspect the ductwork for any leaks or obstructions. Check for proper airflow by measuring the Delta T across the evaporator coil and calculating total external static pressure (TESP) in the air handler unit. To make measuring the Delta T easier, use two cordless psychrometers. Also, use a wireless dual port manometer kit to measure the static pressures easier for calculating TESP. Some of the newer meters and testing equipment calculate these values for you.
It’s also important to test the function of the electronic controls. A clamp meter should be used to help troubleshoot these components. If possible, be sure to inspect, clean, and tighten all of the terminals and connectors within the system. Then, test the incoming VAC at the outdoor unit and check the current of the compressor inrush as well as the compressor running amps. After that, check the capacitors, service the motors and inspect any belts and hoses for wear.
After performing these tests, check the refrigerant charge. If the system is low on refrigerant, check for leaks. A leak detector helps pinpoint leaks that are as small as 0.03 ounces a year — that’s 20 times more sensitive than soap bubbles. If you need to evacuate and recharge the system, the latest vacuum pumps on the market are portable, fast, and allow you to change the oil without turning off the pump or losing the vacuum. Newer digital vacuum gauges are more accurate, more durable, and designed to be connected directly onto the system. These pumps and gauges help make evacuations easier, faster, and even more accurate.
By conducting these regular spring inspections for your customers, you’ll help them keep their HVACR systems running for years and also keep your customers comfortable and happy.
To learn more about the latest HVACR tools, news, and resources, visit fieldpiece.com.
Plus, check this product list to be certain you have all the products you’ll need this cooling season:
