- Liquid recovers quicker than vapor.
- Sub-coolers like the CPS MT69 & simple copper coils can cut recovery times in half! See (Figures 2 & 3).
EPA Section 608 prohibits the intentional release of any ozone depleting substance and technicians make good faith efforts to maximize the recovery and recycling of R-22. As R-22 buy back prices rise and replacing R-22 becomes more commonplace, using techniques that minimize recovery time will lead to greater pay-offs, both in reduced labor costs, reduced call-backs and increased retrofit margins.
- Always use valve core removal tools to remove Schrader cores.
- Always purge all hoses.
- Maximize hose diameters as much as possible.
- Minimize hose lengths as much as possible.
- Use commercial/homemade sub-coolers.
- Avoid using hoses with core depressors or quick release attachments if possible.
- Recovery as much liquid as possible before recovering vapor refrigerant.
- A sight glass makes it easy to determine when all liquid refrigerant has been recovered.
- Utilize inline filter driers to remove contaminants and increase R-22 buyback prices.
- For large refrigerant charges (over 15 lbs), use direct liquid recovery or push-pull methods.
- Ambient conditions can greatly effect recovery times.
- Keep recovery cylinders cool with buckets & ice or wet rags.
- When possible, utilize unit compressor to pump down refrigerant to high side for liquid recovery.