You cetainly need a bleed resistor across the start cap
And you would be safe to assume at least 10 times the run current on
starting up if the compressor has back pressure

Another way to go is to fit a non-return valve (there probably is one
already) between the comp and the tank, fit an electro valve tee'd in to
the pipe from the comp to the non-return valve, power it during the
startup to release the pressure during start. You may find you don't
need the start cap at all, just the valve

Peter Cousens
London UK

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