Answer
Compressors from 180 to 600 l/min can be used, and in general more air gives a finer spray. A 180 l/min unit suits most products that you spread by hand after spraying, such as plaster, grout and finishing mortar. Thin-layer products like levelers, paints and waterproofing need a larger compressor. With compressors up to 400 l/min you can connect the air straight to the jet and use the built-in pneumatic control. Above 400 l/min, always connect the remote control. Make sure the compressor does not restart less than 15 seconds after switching off, and check for air leaks.
Source
Reviewed by our parts specialists from IMER manuals and parts books. Check the part number on your machine or in its parts book before you order. Not sure? Ask a parts specialist.