Some background. I've just recently moved into a new build. It has an Ideal Logic 35 Combi boiler with two heating zones and no hot water tank. It did have two Danfoss TP5000 thermostat/programmers.
What I've done is install the two Heat Links in the garage next to the boiler. These are wired to a junction box. 240v from the boiler junction box is fed to the Nest junction box and supplied to the Heat Links. The T1 and T2 12v connections from both Heat Links are fed into the Heat Link junction box, this is then fed to the boiler junction box and then down the brown and grey wires that were fed to the TP5000s to the Nest thermostats.
It's easier to explain in a diagram so here's how I've wired it up.
Everything appears to be working, the Nests aren't complaining, have power and report no errors. The Heat Links are green lit and respond to the Nests. The problem is when I ask for heat, the boiler fires up but the radiators never get warm. Does my wiring look correct? Could something be stopping the radiators from heating up because my house is warmer than the temperature I've got the Nests set to? Even if I push the button on the Heat Links, no heat yet everything seems to fire up okay.
EDIT: Updated diagram
What I've done is install the two Heat Links in the garage next to the boiler. These are wired to a junction box. 240v from the boiler junction box is fed to the Nest junction box and supplied to the Heat Links. The T1 and T2 12v connections from both Heat Links are fed into the Heat Link junction box, this is then fed to the boiler junction box and then down the brown and grey wires that were fed to the TP5000s to the Nest thermostats.
It's easier to explain in a diagram so here's how I've wired it up.
Everything appears to be working, the Nests aren't complaining, have power and report no errors. The Heat Links are green lit and respond to the Nests. The problem is when I ask for heat, the boiler fires up but the radiators never get warm. Does my wiring look correct? Could something be stopping the radiators from heating up because my house is warmer than the temperature I've got the Nests set to? Even if I push the button on the Heat Links, no heat yet everything seems to fire up okay.
EDIT: Updated diagram
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