CO boiler shut off unit

[hard-work]

absolutely **** all do with gas safe regulations. ( with due respect to Gas Safe Regulations)

Correct. A CO sensor and shut off in the mains to a boiler has sweet nothing to do with that GasSafe lark. The shut off relay, or contactor, could be at the consumer unit with the boiler having its own MCB. Any CO detected and the whole line to the boiler is shut down. The consumer unit is a great place to have one of these as boilers tend not to have too much space around them.

Architects have to know these regs to design their buildings. Like what I am doing now; only interested in the design aspect.

 

[Mikefromlondon]

Correct, I made my Co override in such a way that if it tripped the latched relay would drop out, disconnecting mains to the WAU, and could not be re-energised and latched on by the tenants, only I had the access to this reset button, inside the box of tricks, and when the tenants hear an intermittent beep from its warning buzzer, and a yellow warning light that latches on to indicate Co detected, they had the means to silence the buzzer but not the warning light, nor could they reset it even if they tried to reset power from mains, they were to phone me for advise, whereby I would then arrange for a gas safe engineer to visit the site and meet me up, and check WAU and its flue system for soundness and take Co readings if any were present in the WAU or its cupboard, only then if he says the installation was safe I would leave the unit powered on.

 

[hard-work]

A latched relay is the secret. Once off it cannot come back on and it has to be investigated.

 

[Steelmasons]

A latched relay is the secret. Once off it cannot come back on and it has to be investigated.

Really...have you not heard of a 'gas safety shut off solenoid valve' which is used in order to interlock appliance/s in question.

 

[Mikefromlondon]

We both have but we can't take that route as it involves gas work, you then have to plumb it in under the boiler, you can't disrupt gas to other appliances like the cooker etc, so chopping off power to the boiler would be a lot easier and you then don't tamper with any gas parts as you are not allowed to unless you are qualified to do so.

even so both methods will need interfacing with a Co detector.