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The Honeywell ST9100C 7 Day Single Channel Timer is designed primarily to control a single heating zone or combi boiler. The ST9100C is suitable for mains, low voltage or potential free-switching of the heating load. The ST9100C 7 Day Timer has three on/off switching times per day allowing the user to set 3 different times in the day, which will be can be different for each day of the week, to control the domestic central heating. The ST9100C is deal for combi boiler systems or multi heating zone systems when the user has different heating needs from day to day. During installation the ST9100C can be set to 5/2 day, whereby the week day heating requirements are the same for each day and the weekend requirements can be set differently, or 1 day program where each day's heating requirements differ.
The Honeywell ST9100C incorporates a user friendly clear Line of Text display that provides clear plain English instructions whenever any buttons or sliders are used, meaning that users can reliably use the timer without having to find the manual. Also the ST9100C features a 'holiday' allowing the user to switch off the heating for specified number of days while they are away helping to save on energy and reduce energy bills. The ST9100C 7 Day Single Channel Timer model has superseded the ST6100C which is no longer available.