economizer, scroll compressor

[tranquanghvac]

my instructor asks me to teach economizer for scroll compressor, he told me to look economizer over copeland website. I've tried but hardly to find any about economizer. copeland has moved to emerson.
could anybody help me to find economizer for scroll compressor? instructor said that economizer just a hole on the suction line.

[beenthere]

I think you mean unloader.

Its not a hole in the suction line.

Try your search again, use unloader.