Hello To connect in star or triangle, you need at least three resistors, you cannot do it with 2 In turn, each resistance must be 220 if you connect it in a star or 380 if you connect it in a triangle If the resistance was for 220 and you connected it in a triangle at 380 it is obvious that you are going to burn it If the resistance is 220 you can connect them between phase and neutral. You can use a phase for each one and the neutral as common but the ideal would be to recover the burnt resistance because the fault will be noticed, it will not get to heat what it has to heat Regards