Horstmann CentaurStat 1 User Operating Instructions Manual page 5

Changing the Times and Target Temperatures
Press the SET button until
SET indicator is next to
the PROG position
The time setting for the 1st
period will now flash.
Use the PLUS and MINUS buttons
to alter the start time if required
Press ENTER
The target temperature setting
for the 1st period will now flash.
Use the PLUS and MINUS buttons
to alter the target temperature
if required
Press ENTER
Repeat for remaining 5 time
and temperature periods
Press the SET button until
the SET indicator is returned to
the RUN position
5