RTU Leaking Water: Causes & Solutions

Rooftop units (RTUs) are essential components of many buildings, providing heating, ventilation, and air conditioning. However, like any mechanical system, they can experience problems, and one common issue is water leaks. These leaks can be a nuisance, causing damage to the building and its occupants. This article will delve into the common causes of RTU water leaks and offer practical solutions for addressing them.

Common Causes of RTU Water Leaks

RTU water leaks can stem from several factors, including:

Clogged Drains: The condensate drain pan collects water from the air conditioning process. If this drain becomes clogged with debris, water can overflow and leak from the RTU.
Damaged Seals: The RTU's housing contains seals that prevent water from entering. Over time, these seals can become worn, cracked, or damaged, allowing water to seep in.
Refrigerant Leaks: Refrigerant is a crucial component of the air conditioning system. If there's a leak, refrigerant can escape, causing the system to freeze and produce condensation that leaks from the unit.
Condensation on the Coil: When the air conditioning system operates, condensation can form on the cooling coil. If this condensation is not properly drained, it can leak from the RTU.
Improper Installation: Improper installation of the RTU can lead to leaks, such as misaligned drain lines or inadequate sealing.
Weather Conditions: Extreme weather conditions, like heavy rain or snow, can lead to water infiltration into the RTU, causing leaks.

Troubleshooting RTU Water Leaks

Here's a step-by-step approach to troubleshooting RTU water leaks:

Check the Condensate Drain: Begin by inspecting the condensate drain pan and the drain line. Look for blockages or debris. Clean the drain and ensure it's flowing freely.
Inspect the Seals: Examine the seals around the RTU housing for signs of wear, cracks, or damage. Replace any damaged seals.
Check for Refrigerant Leaks: If you suspect a refrigerant leak, call a qualified HVAC technician. Refrigerant leaks require professional attention.
Verify Condensation Drainage: Ensure the condensation from the cooling coil is draining properly. Inspect the drain line and clean any obstructions.
Evaluate Installation: If the RTU was recently installed, check for any installation errors that could be causing leaks.
Address Weather Conditions: If heavy rain or snow is causing leaks, consider adding weatherproofing measures to the RTU.

Solutions for RTU Water Leaks

Once you've identified the cause of the leak, you can implement appropriate solutions:

Clean and Maintain Drains: Regularly clean and inspect the condensate drain pan and drain line to prevent clogging.
Replace Damaged Seals: Replace any worn, cracked, or damaged seals around the RTU housing.
Repair Refrigerant Leaks: Call a qualified HVAC technician to repair any refrigerant leaks. They will use specialized equipment to detect and fix the leaks.
Improve Condensation Drainage: Ensure proper drainage of condensation by inspecting and cleaning the drain line. You may need to install a condensate pump if the drain line is too high.
Correct Installation Errors: If installation errors are causing leaks, rectify them. This may involve realigning drain lines or resealing the unit.
Implement Weatherproofing: Add weatherproofing measures to the RTU to prevent water infiltration during heavy rain or snow.

By understanding the causes of RTU water leaks and implementing appropriate solutions, you can prevent damage to your building and ensure the efficient operation of your air conditioning system.

Preventive Maintenance for RTU Water Leaks

Regular maintenance is key to preventing water leaks from your RTU. Here are some preventive maintenance tips:

Schedule Annual Inspections: Have a qualified HVAC technician inspect your RTU annually to identify potential problems before they become leaks.
Clean the Condensate Drain: Clean the condensate drain pan and drain line at least twice a year.
Inspect Seals: Regularly inspect the seals around the RTU housing for signs of wear or damage.
Monitor Refrigerant Levels: Have your refrigerant levels checked during annual inspections to ensure there are no leaks.

By following these tips, you can minimize the risk of RTU water leaks and keep your building comfortable and dry.

RTU Leaking Water: Causes & Solutions