Have a Boulter Camray 5 oil boiler with a basic programmer. No room thermostat. Replacing with Nest 3rd gen.
Current controller has L, N, HW on, CH on connections. Nothing is connected to HW OFF or CH off.
From my understanding, after connecting L and N to Heat link I connected CH on to 3 (call for heat) and HW on to 6 (call for water). Also added link from L to 2 and 4 (common).
Note old programmer removed.
When I power up the boiler comes on but this didn't happen on old programmer. So I swapped 3 and 6 for 1 and 4 and it still came on.
Any ideas? Can't find details on how the old programmer worked so it's probably something simple.
Current controller has L, N, HW on, CH on connections. Nothing is connected to HW OFF or CH off.
From my understanding, after connecting L and N to Heat link I connected CH on to 3 (call for heat) and HW on to 6 (call for water). Also added link from L to 2 and 4 (common).
Note old programmer removed.
When I power up the boiler comes on but this didn't happen on old programmer. So I swapped 3 and 6 for 1 and 4 and it still came on.
Any ideas? Can't find details on how the old programmer worked so it's probably something simple.