CT Transfromer connection

Hi all,

I have a 110/220 primary 24vac secondary transfromer from MPJA.

it appears it has two coils for the primary, red and black wire for each.

the question is that of wiring the primary side.

do I use one coil, or parallel the coils ?

Series wiring will have 220 VAC in and 24vac out.

Dave