djdavenport
Member
This is one of those "understanding the soul of the machine" questions. I installed a NCB 240 last spring, so I never really had a full winter to put it though its paces. So, far it's been a very good experience and we're quite happy with it.
We have three zone, radiant in slab heat, single circ pump with zone valves.
In dialing in the ODR curve, (ours is option 5--high mass radiant) it programs in high and low water temps (high, I think is 120F and low is something like 75F). That part I think I get. And, I understand that bumping the low set point of the curve up or down will fine tune the system to (hopefully) the point where it runs nearly continuously (on cold days) and the thermostat acts really like a high-limit switch. If I've missed a cog in the logic wheel, please let me know.
So my question is this: On the front panel, it allows you to set the space heat temperature. Is that only for people w/o a ODR? For example, it will allow me adjust it all the way up to 180F (I set it at 120 to match the high point on the ODR curve). IOW, what happens if someone were to have dialed in a higher temperature on the "set SH temperature" but was using a curve that topped out much lower. Does one cancel out the other?
Sorry if my terminology is a little sloppy. I'm learning as I go.
We have three zone, radiant in slab heat, single circ pump with zone valves.
In dialing in the ODR curve, (ours is option 5--high mass radiant) it programs in high and low water temps (high, I think is 120F and low is something like 75F). That part I think I get. And, I understand that bumping the low set point of the curve up or down will fine tune the system to (hopefully) the point where it runs nearly continuously (on cold days) and the thermostat acts really like a high-limit switch. If I've missed a cog in the logic wheel, please let me know.
So my question is this: On the front panel, it allows you to set the space heat temperature. Is that only for people w/o a ODR? For example, it will allow me adjust it all the way up to 180F (I set it at 120 to match the high point on the ODR curve). IOW, what happens if someone were to have dialed in a higher temperature on the "set SH temperature" but was using a curve that topped out much lower. Does one cancel out the other?
Sorry if my terminology is a little sloppy. I'm learning as I go.