Honeywell Genetron® ST-20™ Flush AC & Refrigeration Flush
Genetron ST-20 Flush for Refrigeration and Air Conditioning Systems With the phase-out of R11, common service practice has been to purge systems with nitrogen and rely on filter driers to clean the system instead of flushing. Unfortunately, filter driers have limited acid removal capacity and recommended procedures such as acid testing and additional filter changes are not always followed.
Line Set Cleaning for Retrofitting Procedure When installing a new R410A air-conditioning system to replace an existing R22 system, it may be possible to use the existing line set. Consult the OEM’s installation manual and determine if the line sizing is correct and proceed as follows: 1. Before starting any work put on approved safety goggles and nitrile gloves and remember to work only in a properly ventilated area. 2. Recover the existing R22 charge; it is illegal to vent any refrigerant. 3.
System Repair and Cleanup Procedure 1. After a mechanical failure or hermetic motor burnout, use Genetron ST-20 Flush to remove contaminants by flushing interconnecting piping as per the directions for Line Set Cleaning. 2. Remember to disconnect all electrical connections to the system and obtain and use safety goggles and nitrile gloves. 4. Do not attempt to push ST-20 Flush through compressor bodies. 3.
