Scroll comp

[davethefridge]

As a Scroll comp has no valves, how do you carry out a pump test

the unit im looking at is a IMI MCU 100+ Condenser

thanks Dave

[powell]

Dave,

To test if a scroll compressor is pumping properly, the compressors current draw must be compared to the manufacturers compressor performance curves using the operating pressures and voltage of the system.

Closing the suction valve to determine how low the compressor will pull suction pressure could damage a scroll.

Here is a link to Copeland's AE bulletins. Check out the Section 4 list of scroll bulletins. You might start with 4-1312.

http://www.hvacrinfo.com/ae_index.htm