CENTAURPLUS C27 is a Timeswitch/Programmer, with back lit display, automatic BST/GMT clock change and 6-pin standard wall plate. It features an industry standard six pin backplate which permits easy replacement / upgrades with C27 versions for non-combi boiler installations where a hot water cylinder is in use. CentaurPlus can be a straightforward plug in replacement for many other manufacturers models. It can be used for control of most domestic gas or oil-fired central heating and hot water systems, combination (‘combi’) boiler systems, stored hot water systems, solid-fuel systems and additional zone control. It offers up to three programmed operating periods per day, seven days a week with hot water boost and heating advance control on a fully pumped system.