HORSTMANN SERVICEPLUS S11R SERIES 2 SERVICE INTERVAL 24 HOUR TIMESWITCH. THE S11R TIMESWITCH WILL ALLOW UP TO 3 ON/OFF SETTINGS PER 24 HOURS & A 1 HOUR BOOST & ADVANCE BUTTON TO TEMPORARILY OVERRIDE CURRENT SETTINGS, THERE IS ALSO A PROGRAMING SWITCH ALLOWING PERMANENT SELECTION OF OFF/ON/AUTO/ALL DAY. ADDITIONALLY THE SERVICEPLUS TIMESWITCH GIVES AN ADVANCE WARNING OF THE ANNUAL BOILER SAFETY CHECK DUE DATE. Dispatched with Royal Mail 2nd Class signed for service.
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