Joined on January 27, 2011
Last Post on March 2, 2014
@ May 20, 2013 10:33 PM in Reverse IndirectThey are about 80% more $$ compare to same capacity regular indirects.
@ May 20, 2013 10:16 PM in Gas Boiler Pump and Zone LocationsHow can it be? Even with swapped sensors , there is a flow sensor.
@ May 20, 2013 8:48 PM in I have noticed more and more shotty workEverybody competes on its own level in its own market.
@ May 20, 2013 11:32 AM in Reverse IndirectReverse indirect is in effect external DHW heat exchanger. it has high peak capacity and lower storage capacity then conventional tank. to size it as a buffer tank will be at least double price compare to indirect water heater. On commercial jobs i use inverted indirect as inter-cooler to bring boiler return temp down.
@ May 20, 2013 6:47 AM in Gas Boiler Pump and Zone LocationsBoiler pump must be either flipped or relocated to right. If you want to relocate boiler pump, then flow direction must be into boiler. If you want to leave where it is, then just flip it. System pump installed on the right, pumping down might work although not kosher. Just keep system pressure on the high side. You might have air elimination issues.i would recommend moving them to the left pumping up.
@ May 19, 2013 3:25 PM in Gas Boiler Pump and Zone LocationsReverse flow on the boiler. Bummer. Pump mut be flipped. This installation is really out of wack.
@ May 19, 2013 12:53 AM in Gas Boiler Pump and Zone LocationsIt looks like system flow is from right to left. Moving 2 system circulators to left pumping upwards might correct installation. Still not going to make it better, but closer to right one.
@ May 18, 2013 10:47 PM in Gas Boiler Pump and Zone LocationsThis is one of ugly looking installations, but as i can judge from the picture only one thing needed is relocate 2 system pumps to system supply side, there might be other issues, but photos are not very clear.
@ May 15, 2013 9:19 PM in Burnham has a sense of humor!I met with NYC DOB boiler inspector to do boiler inspection. He looked at Viessmann Vitodens we installed and said he has a lot of inspection lately where contractors removed new mod cons and installed standard efficiency cast iron boilers. So Burnham is pretty much in the mainstream America.
@ May 12, 2013 4:02 PM in Viessmann Vitodens 100 Combi QuestionI think it will be possible but very expensive to build and run. You will need very powerful circulator to work against resistance of heat exchanger. HX designed to work on street pressure and for 4 GPM might require over 30' of head of a pump. Pump must be SS or bronze. And electric bill will be very high.
@ May 11, 2013 10:03 PM in Automatic water cutoffhttp://www.watts.com/pages/_products_details.asp?pid=6250
@ May 6, 2013 8:00 PM in Burnham has a sense of humor!There is no vs. with small condensing boilers with low going to 9000 btuhr The fight is over. BURNHAM just lost in the past. This facebook posting is very damaging to their reputation.
@ April 14, 2013 7:53 PM in Control options with Vitodens 200 WB2B (Vitotronic 200 + Vitotrol 300)I feel quite humiliated while reading all this mess. We have here DIY fer who decided that plumbers are charging too much for their knowledge and expertise and years of experience and decided that build heating system is not a big deal. Just buy boiler and install few pipes. Meanwhile lets ask some quick questions on this and I m sure some other forums. Then do it. I installed heating systems at houses belonging to heads of major corporations, banks and also people who I know probably hardly even could afford these systems as well. And all of them showed respect to what we did. Rarely I see such luck of respect as in this tread. What would mr. Michaila say I I would start developping software when i need one? Would he go same distance as was done here. Just my 2 cents.
@ April 11, 2013 5:08 PM in BumbleBee questionMedian temperature of the emitter affects emitter outlput. If you increase delta T you decreasing output. To compensate you need bigger radiation surface. This is the reason I always check existing emitters to room loads. Then I can determine maximum deltaT system can safely Handle.
@ April 10, 2013 9:05 PM in BumbleBee questionI actually did it by mistake. Is much as I can recall it just stack at 6.8 GPM. It is minimum capacity in dE mode.
@ April 8, 2013 9:13 PM in Control options with Vitodens 200 WB2B (Vitotronic 200 + Vitotrol 300)I question your reason for posting here. On one hand you asking to explain how system would work in very simplistic and poor configuration, on another hand you asking questions about functions you never will be using unless you will be building complicated Mixed temperature levels loads. I find it very strange and fruitless. We all try to help you if you really need help. But seems you have another agenda.
@ April 8, 2013 8:52 PM in Control options with Vitodens 200 WB2B (Vitotronic 200 + Vitotrol 300)I would never do this configuration for the reason it will not work. I do not want to go into discussion about why it will not work. It will not on most cases. You can show me some diagrams from viessmann or other any manufacturer. I just do not agree
@ April 8, 2013 8:06 PM in Control options with Vitodens 200 WB2B (Vitotronic 200 + Vitotrol 300)I make a living installing those boilers. So far system pumps do not work in the summer on my viessmann installations. On another hand you worry too much. You will not figure out all problems you probably will encounter. And system pump operation will be probably smallest one. Good luck
@ April 8, 2013 8:00 PM in Control options with Vitodens 200 WB2B (Vitotronic 200 + Vitotrol 300)It does not matter if ps or other config is chosen. You just pick one when configure boiler. A pump is a pump. Also you can see other info on page I just posted. D and E shows on and off system pump. Just my 2 cents.
@ April 8, 2013 7:55 PM in Control options with Vitodens 200 WB2B (Vitotronic 200 + Vitotrol 300)From viessmann manual.
@ April 7, 2013 10:58 PM in Control options with Vitodens 200 WB2B (Vitotronic 200 + Vitotrol 300)It is funny to see how subject of thermostats , pumps control, night setbacks comes all the time up.people want control. It is simple, you do not need thermostat, you do not need night setback. You do not need zoning. You do not need control over the heating system. You need comfort and savings. Just set odr , TRVs , and forget about control. System will control itself. On 200 series system pump is controlled by pump module and gets turned on and off when boiler thinks it is necessary. This winter I had a chance to replace brand new German boiler from viessmann competitor. I did not have a chance to put my hands on those boilers and what shocked me is amount of configuration options not needed in real life and low build quality. I guess we get spoiled by viessmann products.