need help rewiring a Ge Protech to a hunter 44155c programmable thermosat Have an X wire and a Y1 that we cannot figure out

Do a rethink,, are you sure you really want a hunter tstat,, if it works at all call yourself lucky and if it holds up very long call yourself even luckier,, they are most all JUNK,spend your hard earned money on a good Honeywell