cancel
Showing results for 
Search instead for 
Did you mean: 

Wiring nest thermostat

cast0804ronae
Community Member

I have a GB100W gas boiler that has a TEKMAR 256 thermostat ,a ceiling transformer is connected to # 8 and 9 terminals, # 5 terminal is connected to the R terminal on the R 8285D-1026 control center on the boiler, # 6 terminal on the TEKMAR 256 is connected to  the G terminal on the control center (R 8285D). How do I connect my nest learning thermostat to eliminate the TEKMAR 

0 REPLIES 0