I have recently converted a 1998 110V Blue Ridge Spa to 220 and it is working great. The heater has two chords coming off it. The small chord is plugged into a 110V outlet on the spa control pack, and the thicker chord is plugged into the 220V outlet of the spa control pack. Both outlets on the pack have 110 or 220 running to them. The tub heats up great but do I still need the 110V chord plugged into the pack? I figured since it's already plugged into the 220 outlet I don't need the 110 plugged in. The thermostat has it's own power supply so I don't think it has anything to do with the 110 chord. The control pack has good directions to convert to 220 but doesn't mention unplugging the smaller chord. Does the 110V chord off the heater need to be plugged in if I'm know 220?