It has been brought to our attention that it may be necessary to commission unit operation if the refrigerant detector/monitor has detected the presence of a refrigerant leak that is higher than it's LFL (Lower Flammability Limit) setting. The release of R454B refrigerant is NOT a recommended way to stimulate this test. it is recommended to spray the refrigerant monitor with compressed CO2 to stimulate this test.
The Danfoss Refrigerant sensors (SEN03387) use thermal conductivity to detect leaks. R454B's thermal conductivity (.013 W/m*k) is about half that of air, so any gas that has a similar thermal conductivity should trigger the sensor. CO2 has a thermal conductivity near R454B of .016 W/m*k.
Compressed CO2 confirmation test
Please see Application Guide (V3) or IOM (IntelliPak) for Refrigerant Detection and Mitigation sequence of operation.
IntelliPak IOMs (Under Product Literature)
Voyager 3 w/ Symbio 700 Controls Application Guide
Angle to point Compressed CO2 into the leak detector is not critical but it may be more effective considering that the refrigerant sensor it mounted on the backside of the monitor.
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.