constant circ

Mellow_2

Anyone know if you have to have a room sensor with a buderus 2107 and all nonelectric panel radiators? I know that it would give better control but one buderus rep sayes yes and one sayes no. I would go with yes this would make faster responce in a cold room at mild temps. out side. Without the sensor overheating could happen.
just as a side note..... if all the heads close in a cold house ...... the sensor will keep the boiler running but will not heat with closed heads. yes I am micro managing this. thanks for any help

Just did this job with a room sensor and it had too much castiron bb constant circ. smoothed it right out.

Mike Kraft_2

I have one

It's been running less the RTU for several years.2107/Oventrop TRV's on panel rads.There have been no complaints.The client seems very satisfied.Just remember the pressure bypass valve.Oh yeah..........the 2107 will keep the boiler firing at design low limit temp if you use the RTU or not.

cheese

Big Ed

I like to....

,,,,use a room sensor and also use a thermostat. The thermo is used as a limit and the room sensor like a remote control....

mellow_3

I see

the point of having both but if you put both on a high temp zone ( I know you shouldn't ) the t'stat could want heat when the sensor dosen't and vice versa. I am thinking of a job, they wanted a sensor on BB heat. Factory said NO. The BB changes temp toooooo Quickly for constant circ. I agree, I also think it will confuse the boiler.
I just have a problem with both. The sensor set for 70 and the t'stat set for 60....... boiler running hot and no heat needed............. the sensor set for 70 and t'stat set for 80, the boiler is cooler and takes longer to satisfy. This is not a big deal in small homes but just don't seem right????
K I S S Keep It Simple Stupid, this is words to live by. If it is not there, than it can not break. I hope to be able to use more buderus products and use them how they were made.
This pic. is a 4'by4' by7' high room. If you want more this is a 2107 control with 3 zones and indirect. The best part is you can fix anything in the room very easy.

Big Ed

Sensor

You need to install the sensor in the higest load.If it bounces of the thermostat you can lower the reference number. Try to keep the offsets tight as you can..

oil-2-4-6-gas

that first picture was hurting my eyes -- i like that set-up with the Buderus indirect piggyback no idea about your sensor location but i did have a question on your install --why didn't you turn those 90's to 45's on the flue instead of having that downslope

Rudy

90s

The down slop is not what I want and will be fixed. I would not use 45s because I have had to clean a lot of units with 45s. The 90s come right apart and the 45s don"t. It"s like a swing joint> I can take the smoke pipe on and off without breaking a seem on a 90. If we put 45s from the boiler to chimney and then cement it. when you clean it you have to remove all the scews and cement. With 90s I can keep the seal at the chimney and remove the pipe with out shakeing the boiler. (yes 45s can be in tight enough spaces to make us shake every thing to get them off). On long runs I might use 45s but I want to make sure they come apart.

P.S please if anyone out there installs and dosent go back after please please think about cleaning and service of the unit. thank you