I've been trying to install a Honeywell DT92E Thermostat to my Baxi Combi boiler, but my first attempts seem to have failed. The two attached images show the rather sparse user guide for the thermostat receiver (it's wireless), and the boiler itself. I've gone with the thermostat wiring shown in the top right of the four options, with a L/N being tapped off from the boiler for power, and terminal 1 and 2 connected to A and B on the thermostat (obviously I removed the link from terminals 1 and 2 on the boiler).
When I power up, the thermostat has power, and it correctly links to the controller, and switches on when above the set temperature as expected. Trouble is, the boiler itself doesn't respond to the thermostat, it just comes on when you set it on manually. Furthermore, the integral analogue timer on the boiler has stopped moving on.
Have I just gone about this the wrong way or is there a more subtle problem going on? I'm hoping I've not done anything totally stupid or even dangerous!
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When I power up, the thermostat has power, and it correctly links to the controller, and switches on when above the set temperature as expected. Trouble is, the boiler itself doesn't respond to the thermostat, it just comes on when you set it on manually. Furthermore, the integral analogue timer on the boiler has stopped moving on.
Have I just gone about this the wrong way or is there a more subtle problem going on? I'm hoping I've not done anything totally stupid or even dangerous!
View media item 34146 View media item 34147 View media item 34148