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gennady

gennady

Joined on January 27, 2011

Last Post on April 13, 2014

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Training

@ June 16, 2013 3:20 PM in How the Europeans do it?

You can bring horse to the water, but you cannot make this horse to drink water. Contractors are unqualified not because they are stupid, but because they do not need to be qualified.

Training

@ June 16, 2013 3:03 PM in How the Europeans do it?

They started production of 3rd generation and us certification would cost a few millions. With 2 reasons I mention in my post they did not feel it was financially sound to continue. The point I'm trying to make is: the root of our industry problems is in low cost of energy to American consumers, it makes efficient but more expensive equipment non competitive. All other issues are just consequences. Just my 2 cents.

American market

@ June 16, 2013 2:36 PM in How the Europeans do it?

A week ago I had dinner with group of people associated with well known manufacturer. I did some installations of their excellent, innovative and well ahead of time equipment. They invited me to let me know they are stopping offering their equipment in US market.
2 reasons:
1. They could not find qualified contractors to install and service their product
2. Complete lack of interest of American public in their product.

They increased their sales in Europe, Asia and Japan.

I felt humiliated.

Market

@ June 10, 2013 11:18 PM in How the Europeans do it?

Is a leveling ground. When customers are settling for low grade cheap installation and service the heating field cannot compensate talented youths and offer them good career, then only uneducated school dropouts filling in positions. And circle of this mess gets completed.

Air vent

@ June 8, 2013 9:37 PM in EDR?

Just move air vent down. It is too high. Only half of the radiator is working.

Boiler

@ May 27, 2013 10:08 PM in Mr.

Standard efficiency boilers are thing of the past. They are sized to the worst case scenario, and this worst case happens only few days a year. The rest of the time standard efficiency boilers just wasting fuel. Contemporary modulating boilers matching load exactly for any given moment when set up properly. Proper installation is essential but setting boiler properly is even more important. 15% savings is a nonsense number. If there is no saving of 70% or more on oil to gas conversion with mod con then you can ask installer for refund. He did not do his job.

Distance

@ May 27, 2013 9:53 PM in Boiler vents - I must be missing something

Distance between supply and exhaust in most cases must be no less than 12". But in new construction usually plumbers and engineers are ignorant in respect of proper boiler installation. So what you see is a least of their heating problems. It is called " builder grade" construction.

Pump slow down

@ May 20, 2013 11:31 PM in Direct Return Pump Question

Pumps slow down will lead to increased effect of gravity circulation. So top floor radiators will get the most of the flow. Make sure top floor radiators have working valves.

$$$

@ May 20, 2013 10:33 PM in Reverse Indirect

They are about 80% more $$ compare to same capacity regular indirects.

Flow switch

@ May 20, 2013 10:16 PM in Gas Boiler Pump and Zone Locations

How can it be? Even with swapped sensors , there is a flow sensor.

How do you compete?

@ May 20, 2013 8:48 PM in I have noticed more and more shotty work

Everybody competes on its own level in its own market.

reverse indirect

@ May 20, 2013 11:32 AM in Reverse Indirect

Reverse 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.

Boiler pump

@ May 20, 2013 6:47 AM in Gas Boiler Pump and Zone Locations

Boiler 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.

Boiler pump direction

@ May 19, 2013 3:25 PM in Gas Boiler Pump and Zone Locations

Reverse flow on the boiler. Bummer. Pump mut be flipped. This installation is really out of wack.

Flow direction

@ May 19, 2013 12:53 AM in Gas Boiler Pump and Zone Locations

It 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.

ugly

@ May 18, 2013 10:47 PM in Gas Boiler Pump and Zone Locations

This 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.

Mod Con to CI boiler upgrade

@ 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.

Storage tank

@ May 12, 2013 4:02 PM in Viessmann Vitodens 100 Combi Question

I 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.

flood safe

@ May 11, 2013 10:03 PM in Automatic water cutoff

http://www.watts.com/pages/_products_details.asp?pid=6250

Condensing vs CI

@ 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.

DIY

@ 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.

Median temperature

@ April 11, 2013 5:08 PM in BumbleBee question

Median 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.
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