Recent content by vcoul

Input voltage to the VFD has a lot to do with highest possible spikes onto motor windings (as does lead length). What voltage is the application?

electricpete, high boiling residue is the percentage of (usually oil) liquid left from a weight of refrigerant analyzed by a lab set up to do this. If you evaporate all the refrigerant off during a test like this you would have 0% HBR. Usually depending on how well loaded the machine is you...

Electricpete, I take it that the chiller being discussed is a low pressure R11 machine. Has a sample of the refrigerant been taken and sent out for analysis? Moisture content, total acid number and high boiling residue are 3 things that may indicate ongoing issues such as low side leaks (vacuum...