Logomatic Interface

Big Ed_3

Can a Buderus Logomatic be interface to a whole house control system ?

Mad Dog_2

Depends big Ed

which one and what are the other inputs? Mad dog

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Glenn Sossin_2

Interface ?

X10 HAI ? Crestron ? What exactly are you trying to accomplish??

Joe@buderus_2

R2107

The Buderus R2107 does not interface with a control manager nor does it have contacts which can be used for external communications.

Glenn Sossin_2

Dry Contacts

Not sure I agree with that comment. We did a house with a 12 zone Crestron system. This guy had all the stats in the basement on the wall just outside the boiler room. They used hidden disk type wall sensors to detect the room temps - similar to the new Tekmar 084. The thermostat dry contacts were used to switch on and off the heating zone relays. This house had no light switches either. Everything was controlled from LCD touch screens. He could see and control the temperature from everyroom.

So, why couldn't the automation system stats be connected to relays, which inturn connnect to the logmatic TT contacts ?

Mad Dog_2

In my simple mind.......

That is what I had envisioned. Jimmy The Gent Burke from Comfort zone knows the Logamatic inside and out. I'll see what he thinks. Mad Dog

Mad Dog_2

Jimmy The Gent is getting a little R & R in Vegas

He'll be back in a few days. Amazing! The 2-way nextal worked like he was in teh next town. Mad Dog

Mike T., Swampeast MO

In my simple mind such a system sounds like a fantasy that will utterly fail within a single generation. A true technician's nightmare with failure of any single sub-system--or even sub-component--requiring intimate knowledge of the entire system with replacement parts being hopelessly unavailable.

The rich people of days gone by certainly had wonderful and extravagent heating systems but they can STILL be maintained--and even improved--by craftsmen. Something tells me that a heating tech 20 years from now will be no more able to repair a "black box" than he is today. Call the company--if they exist and replacement is available you're OK--otherwise you're telling the homeowner, "You're screwed" in your most diplomatic way...

Steve Ebels_3

Glen

How did the system manage
od reset and
dhw priority?

Glenn Sossin_2

Controls

It worked fine as long as the HAI thermostats worked properly. There were a few problems -their side though.

We had 2 boilers, with a turbomax and 2 120gal storage tanks for DHW, and a turbomax T-50 for snowmelt. Used a tekmar 261 to control the boilers,665 for the snowmelt and 2 Tekmar 356 injection controls. It was radiant with forced air back up that was never needed - but this guy wanted back up for the back up. We used Argo relays for the circulators and radiant power heads. The Creston system simply closed the proper contacts on the relays, just like a regular thermostat would. This let the homeowner access his thermostats over the internet to turn them on and off, or from any LCD screen in the house.

There was one part of this project that didn't work - but I warned him about it. They tried to put sensors 2" above the floor in the wall to provide a floor warming function -naturally this would not work effectivly. I convinced the engineering company running the job to let us install Tekmar 509's in the boiler room with probes running to variouse locations throughout the house to control the slab temps and didn't quite explain their function to the homeowner. He still thought he was controlling things from his beloved LCD's.

He wanted complete computer control of the house - the floor warming function was not able to be accessed from his system.

I definetly agree, it was more than overkill. I used the European type terminal strips to interface their wires to our relays. This made it very easy to jump out a zone/or to disconnect their stat to confirm our side of the system worked properly.

This was a townhouse unit - approx 2600 ft. This guy went way over budget and spent approx 800k more on his house than the next door neighbor with a similar unit.

In the end, it provides us all a living even though it was a waste of money in the eyes of most of us common folk. Thankfully some folks feel like spending money. Its fun to get a project where you pretty much have a free hand in product choice and system design - this was one of them.

Joe@buderus_2

R2107

The R2107 does not have a "T T" connection or other wire terminal to override the R2107 logic remotely.

Glenn Sossin_2

Dazed & Confused maybe, but ..

I just looked up the control wiring in the manual and attached application drawing ECO-002 - simple plain jane vanilla- easy to follow.

It appears to me that the logmatic control decides when to allow a heat call by controling the voltage output on terminal H63. It controls the heating system response by turning on and off power to the pump relays.

I still don't understand why this could not be interfaced with a computer system - just the way they draw it on their own wiring diagrams. The only difference in my mind would be that the thermostats are controlled by the home automation system.

On a larger system, the amperage draw may be too much for the logamatic control (5A max) so you may need to take that voltage to switch another relay with 2 poles that could handle 5A or more each pole, or in an extreme case a contactor.

Am I missing something or could it really be this simple ?

Joe@buderus_2

Logamatic

Terminal number #63 is energized anytime the Logamatic is not in warm weather shut down, domestic hot water, or pump logic protection. Terminal #63 is 120Vac output for the heat circulator which is set up for "constant" circulation. A whole house control system cannot directly interface with the R2107 control, but may be tied into a multi zone relay board or other circulator control.