I would like to wire two transformers both Pri: 120 Volts ,. Sec: 24 Volts. in order to get 48 volts at the low side. Should I just wire the primaries in parallel and the secondaries in series? Or do I need to be concerned with polarities ( Additive or substartive ). I'm bringing this thread because of the fact that one of my co-workers said to me that he found two transformers in this system and that the contactor ( outdoor unit ) was making a lot of noise because its coil was at 60 Volts Ac. From where this 60 volts comes from ? I kept on telling him that the max. Secondary voltage he could get is 48 volts from these two transformes..right ? Or I'm Wrong. All I need to prove this is to hook these two transformers that I'm talking about but I can't come up with the time to do it.
Thanks for your help, ahead of time.