@jholbey
You have 208V across two phases, adding the 3rd leg wouldn't give you 240V. You have a 208/120V 3Ø service.
You said you showed no current flow, either your heaters are bad or the control board is not calling for heat, or is just a bad board. I believe the unit would work on 208V but you may have to check with the mfg.
Speaking of mfg, you said this was a new unit, I think I would be calling them under warranty.
Thanks Little Bill... that clears that up about the 240volts. Yes there is no current flow. I really think the unit has issues. I will call the mfg. thanks for your reply
