HE CB25/33 only -If the boiler is operating to provide central heating and a hot water tap is opened, the boiler will automatically switch over to provide hot water. Such an interruption in the central heating should not generally be noticed by any reduction in room temperature. Note: If a clock is fitted to the HE CB25/33 boiler, it will only control the operating times of the central heating. Hot water will always be available when a tap is opened. If a two channel clock is fitted to the HE SY

Service Listed Alpha HE CB25 G.C. No. 47 532 25 Alpha HE CB33 G.C. No. 47 532 26 Alpha HE SY25 G.C. No. 41 532 07 For use with Natural Gas only Leave these instructions with the User 1 DESCRIPTION 1 DESCRIPTION The Alpha HE Range of boilers are wall mounted, fan assisted room-sealed boilers. The HE CB25 and HE CB33 are combination boilers providing both central heating and domestic hot water at mains pressure. The HE SY25 is a system boiler providing heating only for sealed central heating syste