8 18-BC117D1-1B-EN
3-4” from valv
STEP 1 STEP 2 STEP 3
STEP 4 STEP 5
Section 8. Refrigerant Line Leak Check
After completion of eld piping for split systems, the eld pipework shall be pressure tested with nitrogen and then
vacuum tested prior to refrigerant charging.
Important: Under no circumstances shall potential sources of ignition be used in the searching for or detection of
refrigerant leaks.
Important: The following leak detection methods are deemed acceptable for all refrigerant systems:
• Electronic leak detectors calibrated for R-454B (with a sensitivity of 5 grams/year).
STEP 1 - Pressurize the refrigerant lines and evaporator coil to 150 PSIG using dry nitrogen.
STEP 2 - Check for leaks by using a soapy solution or bubbles at each brazed location.
NOTE: Remove nitrogen pressure and repair any leaks before continuing.
STEP 3 - Once the initial leak check is complete, complete a system pressure test. Pressurize the system to the
outdoor nameplate pressure for a minimum of 60 minutes. Do not add additional refrigerant or test gas after reach-
ing the design pressure. The system should show no loss of pressure once pressurized. Once the pressure test is
complete follow the steps for evacuation.
8.1 Check For Leaks
To Next Page
Loading...
