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System Conversion Procedures
Special Note: For large tonnage equipment or unique systems, and or applications, contact ICOR's Tech-2-Tech department for conversion assistance.

DO NOT USE NU-22B OR ANY OTHER 400 SERIES REFRIGERANT IN A FLOODED EVAPORATOR APPLICATION


1. Recover all of the R-22 from system following EPA regulations.


2. Complete all necessary system service and repairs.


3. Pressurize system and perform leak check.


4. Pull system into a vacuum.


5. With system off, initially charge NU-22B in the system to 80% of original R-22 charge as a liquid. Note: charging system with NU-22B as a vapor will reduce system performance


6. Start system and allow pressures to stabilize.


7. To maximize system performance on a fixed orifice system, check compressor superheat, on expansion valve units check system sub-cooling. Adjust charge as necessary. Note: Refer to original equipment manufacturers superheat and sub-cooling specifications.


8. Leak check system and establish preventive maintenance schedule.

 

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