Buderus GB 142 with turbomax / ergomax

Joe@buderus_2

There are some tanks that our probe just will NOT fit into. The idea with the relay still uses the domestic side of the GB142 and the aquastat from the tank.

Jim_95

Buderus GB 142 with turbomax / ergomax indirect

How would you connect a Turbomax / Ergomax indirect tank to a Buderus GB142 boiler. The tank uses an aquastat with no dry well. The boiler has a sensor made for a Buderus tank intended to sense DHW, not boiler water. If you set up the Turbomax on a priority zone, the boiler has a built in outdoor reset control that would prevent the boiler from fireing up to high limit. Also if piped to the supplied manifold, the taping is only 1" and tank needs 1"1/4. Any ideas would be of help.

Big Ed

Options

Is the Turbomax there now? I would use a Burderus ST tank .. Nice tank ..


Would be nice if they made a replacement well... Hint Hint

The one inch pipe would supply the out put from the boiler. Would have to reduce it down...

Jim_95

I cant use the ST tank because of the 27" width. Turbomax is only 18". I think the Turbomax 23 should preform as well as the ST 300 ?

Mark Hunt

Do you


have a link to the Turbomax/ergomax?

I looked at the ErgoMax website and there is no mention of the Turbomax.

What type of aquastat does the Turbomax use? Is it strapped to the side of the tank like an electric water heater?

When we use Phase III indirects with GB boilers, we pull the aquastat that comes with the Phase III out and put the GB sensor down the well.

I do not see how you are going to get the indirect to communicate with the GB control without that sensor.

Mark H

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Jim_95

Turbomax web site is www.thermo2000.com, Ergomax is a differant company but basically the same product. The tank has an aquastat with the probe immersed in boiler water, not DHW with no well. In order to use the thermistor that is included with the GB 142 you would have to install a well in the Turbomax. But then you have the issue of the Buderus control does not go up to 180, since it normally would measure DHW in a Buderus tank. You could trick it with added resistors, but thats a gamble. If you put the tank on a priority zone there is no way for the boiler to know its a call for DHW and the boiler has an outdoor reset wich complicates matters. See my issue?

Mark Hunt

Absolutely


No room for a bigger tank eh?

Mark H

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Joe Brix

Why not use the sensor?

I doubt you need 180° boiler water. If you set the DHW on the GB to 140°, won't the boiler go into high fire? You should have an anti-scald valve on the DHW line. I would think you could "T" in a dry well for one of the top mounted ports for temp guage, air vent, or relief valve.

Maine Doug_43

But does

the boiler care that it is sensing boiler water in the tank vs true DHW? For example, in my Ergomax, there is 150 feet of copper coil sitting in 40+ gallons of water. The aquastat in the well in the boiler water goes to the Tekmar which thinks it is sensing the DHW. When you start drawing DHW, the boiler water in the tank starts to drop and a boiler starts. There is not enough DHW in a "tank" in which to install a sensor since the DHW is in the coils. All the boilers needs to know is that something is getting colder so it goes to work. In my case, the Ergo also adds boiler mass and is plumbed into the primary loop. Not done playing with wiring configurations yet to get around the lack of 2 P1 outputs and so other issues with the dual boiler Tekmar control but the DHW works.

hr

Those reverse indirect

tanks need some pretty high boiler temperatures to preform well. Be sure to check the output tables with lower boiler supply temperatures.

No reason you could not increase from 1" to 1-1/4 right at the tank, although 1" will easily move the output of the small Buderus.

hot rod

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Joe@buderus_2

GB142 DHW Sensor

The GB142 can be "fooled" with a resistor and a relay board with a "normally open" and normally closed" set of contacts. The GB142 DHW setting should be set to 125 degrees. A 3.3k Ohm resistor is wired into the "normally closed" set of contacts. When the aquastat calls the relay on, the normally closed relay is opened resulting in the GB142 seeing a domestic call. When aquastat is satisfied "normally closed" contacts close and the GB142 sees the 3.3k Ohm resistor. please contact me at 1-800-283-3787 or e-mail if there are any questions. Hope this helps.

Uni R_2

Ideas

> I cant use the ST tank because of the 27" width.

> Turbomax is only 18". I think the Turbomax 23

> should preform as well as the ST 300 ?




Is there some other place where you could put an indirect and pipe to it?

Constantin

Have you checked out Triangle Tube?

They make very effective water heaters and everything up to their 60 gallon model is only 22" wide... see the Triangle-Tube website for more info.

The TT may be a better match for your application than a Turbomax or Ergomax. Those creatures are great for applications where huge amounts of DHW have to be created continuously, like very large residential or commercial settings.

Big Ed_3

Clever



Clever and useful set up. I guess the difference with the normal probe set up is the control will not see a slight drop from heat loss and will only see a high demand ? So it will go straight to high fire ? Is this correct ?