hi sven, the little copper links are for the potential coil connections. these are opened for test purposes. if i rember correctly term. 1 & 4 or connected 2 & 3 are the same, the pot coil is hooked across 1 & 2. for 240 volts.it will work fine on 120 volts. just run a little slow. guys correct me on this if i'm wrong.
