Rooftop Unit Maintenance Checklist
Rooftop units (RTUs) are space-saving and energy-efficient HVAC solutions for commercial buildings. While packaged units are built for durability, periodic care is still needed to ensure safety and performance. If you’re looking for guidance on how to keep your equipment in good working order, this rooftop unit maintenance checklist outlines what needs to be done clearly and concisely.
Most of the tasks discussed in this article should be carried out at least once a year, preferably in the fall before the heating season. Any testing or repairs discussed in this article will need to be completed by an authorized technician.
Clear the Area
The first item on any rooftop unit maintenance checklist is keeping the area around the machine clear of debris and obstructions. Dust, leaves and branches can block airflow into and out of the unit and reduce its ability to function properly, so make sure that the area around the packaged unit is free of any obstructions. Be sure to remove any trash like loose papers or plastic bags from the immediate area to prevent them from covering the grille and impeding airflow.
Inspect for Damage
It’s also a good idea to visually inspect the machine’s exterior for any signs of malfunctions. Look for loose panels, rusted fasteners and broken grilles since these can create openings that allow dust and animals to enter the equipment. Additionally, take note of any pooled water at the base of the RTU, as this often means that a clog in the drain pipes is causing water to back up instead of draining properly, which could lead to water damage or mold growth.
Clean the Grilles
In addition to maintaining the grilles on the rooftop unit itself, remember to clean the indoor grilles that cover the air vents within the building to improve airflow. While fixed grilles must be dusted or vacuumed in place, unscrewing removable grilles makes it easier to clean the grates thoroughly. A soft cloth or brush is usually enough to remove dust particles, but warm water and mild detergent may be needed for thicker grease deposits.
Set the Thermostat
While it seems trivial, keeping an eye on your HVAC system’s thermostat settings is an essential part of rooftop unit maintenance. If your thermostat doesn’t adjust automatically, be sure to modify the temperature settings as needed, especially as the seasons change, to maximize energy efficiency and lower utility bills. Also, take note if the thermostat’s settings seem hotter or colder than the actual indoor air temperature since this usually means that it needs to be calibrated by a licensed technician.
Check the Insulation
Although the building’s insulation isn’t part of the packaged unit itself, it plays a crucial role in improving your HVAC system’s efficiency. If you notice unexplained drafts or temperature inconsistencies in certain parts of the building, it’s a good idea to make sure that doors are sealed, windows are tight and insulation is intact so that your heating and cooling system doesn’t have to work as hard to keep indoor temperatures stable.
Call for Service
For help with more complicated maintenance tasks, schedule an appointment with an authorized technician before the winter heating season, and if possible, again in the spring prior to the summer cooling season. The licensed technician is likely to perform a variety of checks during the appointment, such as:
- Changing the air filters
- Dusting the outdoor grilles
- Cleaning the condenser and evaporator coils
- Inspecting the heat exchanger
- Maintaining the dampers
- Repairing the ductwork
- Unclogging the drain lines
- Calibrating the thermostat
- Checking for refrigerant leaks
- Replacing the drive belts
- Lubricating moving parts
- Testing electrical components
Watch for Abnormalities
Once you’ve completed the maintenance checklist outlined in this guide, remember to stay alert for possible issues with your rooftop unit. If you hear odd noises, smell unusual odors or notice reduced performance, reach out to a licensed technician sooner rather than later so that small problems don’t turn into bigger, more expensive ones later on.