TIPS FOR DETECTING HVAC SYSTEM LEAKS BASIC INFORMATION


1. Inspect entire A/C system for signs of oil leakage, corrosion cracks, or other damage. Follow the system in a continuous path so no potential leaks are missed.

2. Make sure there is enough refrigerant in a system (about 15 percent of system capacity or 50 psi/min) to generate pressure to detect leaks.

3. Check all service access port fittings. Check seals in caps.

4. Move detector probe at 1 inch/s within inch of suspected leak area.

5. Refrigerant is heavier than air, so position probe below test point.

6. Minimize air movement in area to make it easier to pinpoint the leak.

7. Verify an apparent leak by blowing air into the suspected leak.

8. When checking for evaporator leaks, check for gas in condensate drain tube.

9. Use heated sensor type detector for difficult-to-detect R-134a, R-410A, R-407C, and R-404A.


NEW COMBUSTIBLE GAS DETECTOR (with ultrasensitive, long life sensor)
• Hand-held precision equipment detects all hydrocarbon and other combustible gases including propane, methane, butane, industrial solvents, and more.

• Sensitivity, bar graph, and beeping to signal how much and how close.

• Unit is preset at normal sensitivity, but you can switch to high or low. After warm-up you will hear a slow beeping. Frequency increases when a leak is detected until an alarm sounds when moving into high gas concentration. The illuminated bar graph indicates leak size.


• If no leak is detected in an area you suspect, select high sensitivity. This will detect even low levels in the area to confirm your suspicions. Use low sensitivity as you move the tip over more defined areas, and you will be alerted when the tip encounters the concentration at the leak source.

• Ultrasensitive sensor detects less than 5 ppm methane and better than 2 ppm for propane. It performs equally well on a complete list of detectable gases including acetylene, butane, and isobutane.

• Automatic calibration and zeroing.

• Long-life sensor easily replaced after full service life.

Applications
• Gas lines/pipes
• Propane filling stations
• Gas heaters
• Combustion appliances
• Hydrocarbon refrigerant
• Heat exchangers
• Marine bilges
• Manholes
• Air quality
• Arson residue (accelerants)


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