EWC Controls Forum

will i need the bypass if the second stage will not operate? also willl the btus uotput will be limited to what percentage in the first stage.

i read that if you use ncm 300 using 2 stage furnace if the you use less than 50% zones the board will not let the second stage to turn on.
Now i just have 2 zones so 1 will equal 50% will the second stage will turn on?

i am installing a tons 120k buts system with a 2 zones (basement and street level i will be using 92% furnace tempstar 2 stages also do you think 5 ton cooling and 120 btu will be for a 2700 square feet home will be enough? for california where 30 farenheit isi the lower and 105 high average high ...