Tstat8 reg 352 - 353 have found limitation to 9 degrees or will default to 1 on power cycle.
using fahrenheit we need 50 Night HTG and 80 Night CLG operation.
we can set reg 350 night setpoint to 55 , reg 352 to 5 and reg 353 to 25
this will work OK until power cycle then reg 353 will default to 1