NOISEY SYSTEM PIPES AND SALUS WIRELESS CLOCK PROB?

jUST CHANGED OVER FROM CONVENTIONAL TO SABRE 35HE COMBI , GREAT HOT WATER AND HEAT OK BUT VERY NOISEY PIPES EXPANDING ETC AND ALSO SALUS WIRELESS THERMOSTAT AND TIMER SEEMS TO PLAY UP. HAS 5TH SETTING FOR EACH DAY??? SOMETIMES STAYS ON WHEN SHOULD BE OFF ON HEAT SIDE PLEASE HELP !!