Qwik™ System Flush® is used to flush contaminants such as residual oil, acid, or moisture from refrigeration line sets. If you can't replace refrigeration line sets after a burnout or R-22 to R-410a change out then you should use Qwik System Flush to remove residual contamination. See our application bulletin for in depth instructions on how to use Qwik System Flush.

The following equipment will be required for each flushing operation:

1. A can of Qwik System Flush® (SF). One can will clean up to a 10-ton refrigeration system
2. Compressed nitrogen cylinder with pressure regulator
3. An empty container to catch the waste oil and impurities as they exit the system
4. A can access valve, such as Mainstream part number QT1105 or equivalent
5. A tube access fitting, such as Mainstream part number QT1110 or a flare fitting that can be brazed onto a cut lineset.
6. Refrigerant charging hose with ¼" flare terminations
7. Protective gloves and safety glasses

3 STEPS TO FLUSH A SYSTEM

WARNING: Never Connect Qwik System Flush to a Manifold Set or to a Nitrogen Tank! Can Will Explode if Pressurized!

For best results, perform flush when system and the Qwik System Flush® (SF) canister are both above 50° F.

1. Use with adequate ventilation of at least 4 air changes per hour.
2. Whenever possible, arrange the flushing process so that the system is flushed from inside the structure to the exterior with the waste canister positioned outside the structure in the fresh air.
3. Disconnect electrical power to the unit being serviced.
4. As with any flushing product, the compressor, expansion device (TXV, capillary tube, etc.), and filter-drier(s) should be removed from any circuit to be flushed.
5. Position the waste container at the outlet of the flushing line. Ideally, this should be outside the structure in the fresh air.
6. Purge the system with nitrogen. Never use a nitrogen purging pressure above 100 psig. Always use a pressure regulator. The nitrogen purge will remove loose contaminates and waste oil, thus improving the effectiveness of the Qwik-SF®.
7. Create a slight restriction at the outlet of the flushing line.
8. Flush the system with Qwik-SF®. This is done by attaching the access valve to the Qwik System Flush® can and using a single charging hose between the can and the system. Do not use a charging manifold. Do not use any hoses that are also connected to the nitrogen pressure source to avoid accidently back-pressuring the can and causing the can to explode. Invert the can to ensure that the Qwik-SF® is introduced as a liquid.
9. Purge the system with nitrogen. Never use a nitrogen purging pressure above 100 psig. Always use a pressure regulator. This nitrogen purge will remove any final remaining liquids and contaminants.
10. Properly dispose of the waste oil and contamination with your other waste refrigerant oil.
11. Replace removed components, install a new filter-drier, and add a suction line filter-drier if there was a burn-out. Leak check the system, evacuate, and charge the system.
12. Verify proper operation. Use a QwikCheck® (QT2000) to test for any residual acid. Optionally, for added protection against acid and moisture, QwikShot® Acid Flush™ can be added to the operating system.

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