Skip to main content

HVAC Rooftop Systems Maintenance

HVAC Rooftop Systems Maintenance

commercial HVAC installation in MOAmerican Services Commercial HVAC maintenance and repair service serving St. Louis County knows that maintaining rooftop HVAC systems properly is vital to prevent expensive problems down the road.

Here are a few useful tips from contractors on servicing and maintaining HVAC rooftop units.

According to Steve Moon, Elkton Maryland; “When I think about rooftops, I think of lack of maintenance for that unappreciated soldier sitting up on the roof, all by himself, until he breaks.”

Regularly scheduled maintenance on HVAC units is the only way to ensure the HVAC system is in good running condition.  Sometimes convincing commercial building owners to spend the money on proper maintenance is not always easy, according to contractors.

“The downfall is that packaged units are typically the easiest ones to service, but they get the least amount of service because they’re out of sight,” he continued. “It’s up there, and as long as it’s working, they don’t want to know about it. They don’t want to poke the bear,” says Moon.

Educating commercial building owners is an important factor improvement in rooftop maintenance. Regular maintenance will cost an owner a specific amount, but lack of regular service checks will result in higher cost for business owners.

“The biggest tip is to find clients who are willing to spend the money for a mechanic to do a proper inspection, not a fly by,” said Ronald Sage, vice president of Westside Mechanical Inc.  “If it’s a 130-ton VAV [variable-air volume] RTU [rooftop unit], with an ERV [energy recovery ventilator], Aaon, or a little 5-ton RTU, they all have specific requirements. Each task takes time for a mechanic to do.”

Lack of service education is bad for the consumer as well as the HVAC contractor who may lose work to companies not performing proper maintenance.

One method of making sure that rooftop HVAC systems are operating properly is to make sure the surface they sit on promotes efficiency.

“I have seen the ambient temperature well over 120˚F here in Florida on the roof because of the color of the roof being black,” said Chris Johnson, HVAC sales consultant, Sunrise, Fla.,  “This causes many premature failures that could be prevented if the roof around the rooftop unit is cool sealed with a light-colored coating. Remember design temperature is 95˚ — talk about capacity loss.”

Changing fan belts regularly is another important tip for HVAC systems.

For more tips on HVAC maintenance or repair, contact us today at American Services in St. Louis.

Water Damage and Commercial HVAC Systems

Water Damage and Commercial HVAC Systems

water damage HVAC repair in MOAmerican Services commercial HVAC service near Ladue knows that commercial HVAC systems are prone to causing water damage if they are not regularly inspected, the preventative maintenance is not kept up, and if problems are overlooked. An inexpensive fix left untouched can lead to major water damage in your building resulting in expensive repairs. Ensure your staff knows what to look for in their office or as they move throughout your building on a daily basis.

Moisture problems can occur in commercial buildings when there is uncontrolled airflow. Typical problems are a result of commercial HVAC systems that have an imbalanced airflow that results in air loss to the outside. Some common causes of this negative pressure situation is insufficient return air supply, improper balance of ventilation and exhaust systems, and supply duct leaks. It is important that relative humidity be monitored in all areas of the building, as this can be an indicator of problems. Proper preventative maintenance measures includes checking the HVAC system balance regularly to ensure appropriate pressures and airflow. Additionally, it is important to check HVAC response to thermostats, humidistats, and other control systems regularly.

In large buildings that utilize cooling towers there is an enormous amount of water that gets moved around. Correct drainage and basic plumbing systems within your commercial HVAC system is imperative and are critical to performance and risk reduction. As a preventative measure to reduce the potential of water damage, fan belts, motors, and other basic system components should be appropriately inspected, lubricated and maintained. All rooftop systems should be checked monthly, especially all water distribution systems and drainage elements.