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I have installed the nest replacing Grasslin control box and Honeywell thermostat. I can only get hot water and heating when the nest thermostat isn't connected. Any suggests??
Correct.Live goes to live neutral goes to neutral
Also correct. This provides a live supply to the Heating and Hot Water Common terminals.From live link to 2 and 5
Grasslin 4, 'Central Heating On' = Nest 3 'Heating call for heat' That's as it should be.Then from old timer put 4 of old timer into 3 of nest =ch on.
Grasslin 3, 'Hot Water On' = Nest 6 'Hot Water call for heat' That's too is as it should be.Then 3 of old timer into 6 of nest =Dhw on
Grasslin 1, 'Hot Water Off' = Nest 4 'Hot Water Satisfied' also correct.Then 1 of old timer to 4 of nest = Dhw off.
OK fine, that should do the trickRemove wired room stat and connect common and sl together = 1 &3 .
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