On Thu, 9 May 2019 21:31:39 +0100, tony sayer wrote:

Unit has turned up and as expected its 110 volt AC operation ...

Late to the party, you have checked that the primary isn't two 110 V
windings in parallel haven't you? US mains is 110 V bi-phase and
neutral, most stuff is connected phase - neutral (110 V) but big
loads like washing machines at phase to phase (220 V). To be honest
I'd be suprised if it does have two primary windings but you never
know.

--
Cheers
Dave.