Hi, i have an old gravity fed dhw with pumped heating system. My boiler is an old Baxi bermuda 552 with a honeywell st7100 programmer and salus room thermostat, no cylinder stat.
I'm not sure if this is ok but when i turn the central heating on regardless off whether the room stat is calling for heat, the boiler turns on. only when i turn the heating off at the programmer does it turn off. I thought that the room stat should control both the pump and boiler? At the moment the room stat is merely a switch for the pump, and so the boiler continues to cycle, heating the water. Now i know it's an old gravity system but surely when the room stat breaks the connection it should also turn the boiler off too?
I've checked the installation wiring for the programmer and it seems to be correct so i'm a bit baffled with it.
I'm not sure if this is ok but when i turn the central heating on regardless off whether the room stat is calling for heat, the boiler turns on. only when i turn the heating off at the programmer does it turn off. I thought that the room stat should control both the pump and boiler? At the moment the room stat is merely a switch for the pump, and so the boiler continues to cycle, heating the water. Now i know it's an old gravity system but surely when the room stat breaks the connection it should also turn the boiler off too?
I've checked the installation wiring for the programmer and it seems to be correct so i'm a bit baffled with it.