Buderus room sensor

Vinny baga doughnuts

I have a multi zone (4 inc. dhw) buderus oil boiler with a Taco 504 relay and the 2109 control head.

All the heat is baseboard with t87 t-stats. My supplier sold me 1 buderus room sensor. I am not sure if the room I am putting this in still needs its orginal thermostat in addition to the buderus room sensor.

The problem is the room sensor is supposed to plug into the control head 2109. That would mean the room would need another thermostat plugged into the Taco 504?

I am trying to get an answer before Tuesday and everyone is closed do to the holiday. Any input is greatly appriciated.

Vinny baga doughnuts

correction I have the 2107 head

Mark Hunt

Room sensor


You do not need the T-87 in the room that gets the sesnsor. that will be the "Master Zone" and the sensor will chat with the 2107.

All of your reset will be through that zone as well.

Mark H

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Vinny baga doughnuts

then what terminals would power the circ for that zone?

Mark Hunt

Don't have


my Buderus book with me and I can't remember which terminal block it wires into.

Sorry.

Mark H

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Mike Kraft_2

Vinny

I'm guessing you have the 2109.This control has evolved over time.With the evolution it also has changed model#'s.The 2107 has no outdoor reset.It offers DHWcirculation/priority,heating(1 zone)and pump logic.Pump logic is a low limit that will kill heating circulation to allow the HX to rise in temp to protect against flue gas condensation.

The sensor as Mark noted eliminates the need for a t-stat.It is primarily used for a constant circulation stradegy.As Mark said it is installed in the room with the biggest load.The sensor "bugs"to the "BF" terminal block.

cheese

Unknown

Your supplier sold you a Room Sensor?

Did your supplier also tell you why and where to put it?

The room sensor for the Ecomatic I've found to be of little or no help at all in adjusting/shifting the heating curve in most conventionally built residential applications. It seems to give the control just a little too much information and as a result, over/under heating of the other rooms is usually experienced in the areas of zoning to which it is not connected to. The whole system temp is defined by the feedback the room sensor sends the HS control. Not a good application for most North American residences. Leave it out and use constant circulation with independent zoning. JMHO

Best advise I can give you is to post your question on Buderus's Q&A forum. Here's the site. http://www.buderus.net/forum/forum_topics.asp?FID=3


I hope this helps.

Buderus has a GREAT offering.

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Mike Kraft_2

Vinny............

Dont listen to me:)I have my model#'s a bit twisted in my head.Mark just emailed me to save me from the wrath of the Wall of late;).

the 2107 is what you have(but you knew that)and it indeed is equipped with weather response.What I described,the 2109 is the stripped down model.What are you using for emitters?Infloor or panels or both?

cheese

Rudy

sensor

you have the #s mixed up. 2109 is the basic control and the 2105 or 2107 control has an out door reset. the room sensor only works with the 2105 or 2107. I have put many in and if you follow the manual for the system you are installing it works great. sounds like you have more than one circ. The sensor sould go in the coldest zone or the hardest to heat. The circ. for that zone is wired directly to the HC terminal (heating circ terminal on the 2107). This circ will run when the temp out side dipps below 63 degrees or what you set it for, the boiler just adds heat as needed. the other zones are like slave zones but the zone panel should be wired to HC terminal too (this will turn off the heat when heating the hot water indirect). This will be constant circ in the sensor zone but not in the slaves. sometimes this is a problem in basement slave zones or with BB heat the temp on BB changes very fast some adjustment might be needed. good luck

Joe@buderus

Room Sensor

The Buderus Room Sensor is designed for a constant circulation zone. It communicates the actual temperature in the zone to the R2107 and adjust the water temperature accordingly. It is suggested to place the room sensor in the coldest room on a multi zone system. It is suggest to change the "Room Comp" in the R2107 to a setting of "18" verses the factory setting of "5". This will allow the room sensor to adjustment the water temperature above/below the designed heating curve temperature.
The R2107 is the outdoor reset control. The R2109 is the standard operating control (no outdoor reset, or room sensor option). Both controls offer the condensate protection, miniumum boiler firing temperature, and delayed DHW circulator on to prevent reverse heat transfer.