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Joined on December 29, 2008

Last Post on August 23, 2014

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Radiant Control

@ November 3, 2009 6:26 PM in temp settings for staple up radiant

I think you mean your house is 7 loops of radiant all on 1 zone.  The contender does not have out door reset out of the box so I would make sure I use a mixing valve. From your radiant heat loss and design you should have a water temp that you need at your design temp to heat the space. In laymen  terms, you need xxx degree of water temp to heat the space to your setpoint temp (70) for most people in most cases at 0 degrees unless you live in a climate that has a colder or warmer design day. A modulating mixing valve will allow you to set a heating curve for the radiant. Munchkin does offer a control package for this. It is called Vision 2 and can be added to your boiler. You really need the valve not only for your comfort but as protection for the floor.

High altitude

@ November 3, 2009 6:05 AM in Vito Love

The new 100 is sutiable for high altitude levels up to 10,000 ft without deration you must be way up in the mountains. The new 200 requires a coding plug above 5,000 ft. You can make the old 100's outdoor reset. Viessmann does have the kits and I have a few also. 


@ November 2, 2009 9:03 PM in Triangle Tube Prestige System, w/ Smart Indirect - higher temp zone with Rescom 2100 aluminum baseboard?

Hopefully it works for you. Solo is a good boiler and I glad to here your happy with your choice. I hear you on the possible cost of trying to be tricky because the new Vitodens 200 is not much more than that Solo so you could eat that cost up real quick.

I also questioned

@ November 2, 2009 8:58 PM in Radiant Boiler Sizing Choice

the 37k min on the boiler. This is the anwser I recevied from Viessmann on this.
Once you begin to get lower than 25% of the rated output of a mod/con it tends to be tricky to keep the flame clean and maintain optimum efficiency. It also becomes tricky as gas pressures and quality change from the street and even harder with LP  to keep the flame clean and maintain optimum efficiency.  Remind you this only applies to the Vitodens 100 not the 200.

The difference between

@ November 2, 2009 8:44 PM in Vito Love

Viessmann and everyone else? Viessmann sells systems everyone else sell boilers! Wait until you get to play with the new Vitodens 200...It's even smarter!

To bad you already chose a TT

@ November 2, 2009 8:36 PM in Triangle Tube Prestige System, w/ Smart Indirect - higher temp zone with Rescom 2100 aluminum baseboard?

Because a Viessmann Vitodens 200 will do exactly what you want the Solo to do. Can run actually run up to 3 curves if you wanted plus still have domestic priority. You could also get indoor feedback for both the high temp and low temp curves with the Vitotrol Remote Control. No need for tricks just plenty of treats. Boiler is 96% out of the box and 98% at full mod. Doesn't vent PVC though. You can vent this with 2" CPVC rated for venting which Viessmann has for a boiler of this size. Can also take combustion air from inside the room if need be. Alot more benefits, take a look

Your welcome

@ November 2, 2009 6:52 PM in Raidant heat install

Great to hear and you are more than welcome. As a big fan, supplier and installer of Viessmann products as well as radiant heat I would prefer to see you back here with a smile and happy with your system then to see you back here with a frown. Best of luck and let us know how you make out.


@ November 2, 2009 6:03 PM in Raidant heat install

I'll give you a few pieces of advice.
1.  Scrap the 1/2 tubing and run 3/8". Much easier to pull and you get the same btu ouput. The only advantage to using 1/2" is you get a 50' longer loop length.

2. Your going to kick yourself down the road for not using heat transfer plates. They give you a better response, an even distribution of heat across the floors and will give you much more flexability in controlling your comfort.

3. Don't attempt this without consulting a pro. This again is not a DYI job.

4. You can take the basboard in  those bathrooms and throw them in the garbage. If you have a radiant heat loss done you will see that you can proabably heat the bathrooms with the radiant that is in the slabs.

5. What size Vitorond 100 do you have. VR1-22 or VR1-27. Any bigger than the I would suspect that the boiler is oversized.
6. I would be using Viessmann Controls. Nice tight one packaged system. I would strongly encourge you to call Paul Ross as I stated below and find a contractor.

I would suggest

@ November 2, 2009 4:05 PM in Raidant heat install

you call Paul Ross Associates they are the Viessmann rep for Mass and I'm sure they can get you in touch with a qualified contractor.  You need to start with a new heat loss not only for your high temp basboard but also for your radiant. Paul's group specializes in low temp hydronics and Viessmann. You can reach them at 413-543-8733. Tell Paul Chris from RAL gave you his number and that you are looking for a contractor in your area. Let him know that you have a Viessmann boiler already on the job. Where in Mass are you?

Slow down

@ November 2, 2009 3:54 PM in Circulator Whistling?

your flow rate. I would recalculate my system GPM and head. You might find that you most likely need to change that circ to a Grundfos UPS 15-58FRC and put it on low speed. On low it is more equiv to a Taco 005/006 but has the potential to go all the way to a 008 if need be.

You really have me confused

@ November 2, 2009 3:48 PM in Raidant heat install

Do the rooms with the sensors in the floors have radiant? Do they also have baseboard in those same rooms? If you have both radiant and high temp (baseboard) heating you cannot run the same water temp for the radiant as you do the baseboard.
By the nature of your questions you really need a professional before you end up costing yourself alot of money to fix down the road. That is the best advice I can give you. There are plenty of great contractors in here from all over the states and you could sure use one. Where are you located?

I would suggest

@ November 2, 2009 3:34 PM in Raidant heat install

You get the proper Viessmann controls and find a professional. This is not a DIY install. There are alot of variables here especially with floor sensors.
Do you have a heat loss? Do you have a radiant design for the floors? What was the objective when this job was originally sized? Where are you located?

I'm confused

@ November 2, 2009 3:32 PM in Raidant heat install

You stated that you have sensors in the floors. Is this a baseboard job with floor warming? If so, why if he sold you a Viessmann would they not just sell the Vitotronic control with Viessmanns 3-way mix vlv and vitorol control. With this you could have both a high temp curve for the baseboard and a low temp curve for the floor warming.

Like Dan said

@ November 2, 2009 3:25 PM in Raidant heat install

See the local supply house. You could have a potential for a problem here. Did you purchase the Vitorond with a Viessmann control on it packaged from the factory? If not and it is the basic boiler with a honeywell aquastat they do not install the return water injector on boilers sold with honeywell aquastats. You may not have the boiler protection you need for low water temp systems, ie,  radiant.

Heat Loss

@ November 2, 2009 6:32 AM in size house or radiation

You always size with a heat loss as BoilerPro has stated. You can measure the radiation to see what it's capable output is at a given supply water temp and then use that with the heat loss to find yourself a heating curve. But keep in mind you must also protect that boiler from low return water temps if it is cast iron.

Call the installer

@ November 1, 2009 4:48 PM in Circulator Whistling?

In your topic you said you has this installed. Why are you trying to figure out what is going on? Call the contractor that installed the boiler, it's his install and his work. I'm sure he would like to know if something is wrong. The more you keep playing around with it the more he is going to say you caused some type of problem.

GPM and Head

@ November 1, 2009 7:44 AM in Fin Tube and Tekmar 361

Based on the info you are providing and I may be a little off but here is what I come up with for a system pump.
20 degree delta t would require 13.4 GPM at 15.16 ft of head = Taco 0011
30 degree delta t would require 8.9 GPM at 15.16 ft of head = Taco 0014
This is all based on you delivering 134,000 btus, the longest loop length you provided and that you are zoning with zone valves.
Personally I would use a Grundfoss 26-99 Pump. That will cover both curves with the turn of a dial.

Condensing Boilers with Baseboard

@ October 31, 2009 6:41 PM in Condensing Boilers with Baseboard

More and more this type of installation is the norm. I dug around Brookhaven and Dept of Energy and came across this study done in October of 2004 by Dr Thomas Butcher. It's a pretty interesting read. Thought some of you out there would like the read.

What I got out of it is the importance of a heat loss, use a 30 degree delta t when you can and set the right heating curve/ You should condense condense and condense 90 percent of the time during the heat season and still keep the customer comfortable.

Scrap 3 and 4

@ October 31, 2009 6:31 PM in Replacement Boiler

Choice 2 will be having some upgraded controls in the near future. Burnham is beginning to get ready for 2012 and is starting to implement the same control strategy that is now in the ES2 into the MPO and the Apline. You may find that the current Alpine is not current by mid next yr. Don't know much about choice 1 as not used in my market very much to the best of my knowledge. The new Viessmann Vitodens and Triangles Solo seem to be the boiler of choice in my market with the VItodens being the leader for me.

I agree

@ October 31, 2009 6:15 PM in Fin Tube and Tekmar 361

on the 120 but I would recommend that he have a pro revisit that heat loss. Based on his loss his house is somewhere the the 5,000 sqft range or it is uninsulated with crappy windows and in the 3,000 sqft range in a zero design climate.
He has plenty of board to increase his delta t out to 30 providing he protects the boiler. This application drools for a mod/con. He needs to size those pumps based on a 30 not a 20 delta t. He stated in his post he needs 13.4 GPM but also states that his delta t is larger than 20 so he is contridicting himself. Can't come up with that 13.4 unless it is a 20. 

Why make so complicated

@ October 31, 2009 1:05 PM in Fin Tube and Tekmar 361

Small project requires easy install and control. Conventional cast iron boiler, I would use a Taco RMB. All my injection piping is done as are both my injection pump and system pump. And it will handle the load based on your heat loss. It also will give you boiler protection. KIS all the way. Don't be worried about the overrated house that's a good thing. Nobody ever said that you must maintain a 20 degree delta t

New 100

@ October 31, 2009 12:06 PM in Viessmann WB2B Hot Water Priority?

The new 100 has priorty logic in the control. You just don't use a sensor. Has a sperate DHW block that you need to wire to. When that block is activated it shuts down RT (TT) terminals and goes into high fire.