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gennady

gennady

Joined on January 27, 2011

Last Post on April 13, 2014

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bumble bee

@ April 10, 2013 9:05 PM in BumbleBee question

I 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.

Reason

@ 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.

One pump

@ 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

Observation

@ 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

P/s

@ 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.

See fig 20

@ April 8, 2013 7:55 PM in Control options with Vitodens 200 WB2B (Vitotronic 200 + Vitotrol 300)

From viessmann manual.

Control

@ 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.

flash?

@ March 30, 2013 10:05 AM in What do you use to flash external terminations?

photo

Pro dope

@ March 29, 2013 10:00 PM in Threaded connections

Pro dope is the best and only tread joint compound right for job.

http://www.oatey.com/doc/prodope.pdf

BPI and all this green thingis

@ March 26, 2013 8:37 AM in Integrated HVAC

Unless price of gas and oil will go up dramatically there is no incentives to install efficient equipment. Amount of paperwork  and related expenses defeats the purpose of rebates. Clients who chose to go through these programs are from the bottom of the pot and generally just want to get systems installed free of charge, The real moving force today in high efficiency business are clients who enviromentally concerned, the ones who want the best equipment market has and oil customers who think gas will stay cheap forewer
The reason Europe and the rest of the world is so ahead of US in energy efficiency is beacause they pay at least double of what we pay for oil and gas. they are forced to be efficient. We in US are forced to be unefficient.  This is the case when one green beats another green.

Testo

@ March 24, 2013 11:33 PM in Just Don't Get Modcon Boiler Pump Charts!

I like testo http://www.testo.com/online/abaxx-?$part=PORTAL.INT.SimpleContentDesk&$event=show-from-menu&categoryid=23775814

Kis

@ March 20, 2013 10:27 PM in Just Don't Get Modcon Boiler Pump Charts!

Keep it simple

BURNHAM es

@ March 16, 2013 4:40 PM in Oil to gas conversion

Is a non condensing mid efficiency boiler. Buderus gc 124 is also non condensing mid efficiency boiler. Did you considered high efficiency condensing direct venting boiler? You will not need expensive lining and rebates are doubled.

Navien

@ March 16, 2013 4:28 PM in Do I really need a Navien CH-240?

I personally do not like navien products, but to be fair, all this sounds as an installation and design problem rather than navien problem.

Rebates

@ March 16, 2013 4:01 PM in 95% Efficient Condensing Replacement Boiler

Rebates will never cover difference between high efficiency and standard system. You have an issue with contractors and their sizing and pricing.

199.000 btuhr ???

@ March 16, 2013 4:01 PM in 95% Efficient Condensing Replacement Boiler

Are you heating a building? Where did you get those numbers?

What heat loss has to do with application of cast iron radiators in high efficiency system?

@ March 16, 2013 3:58 PM in 95% Efficient Condensing Replacement Boiler

Heat loss here heat loss there. How can one say that cast iron radiator based system will condense only in mild weather? Heating emitters sized for deign temperature and this temperature happens to be only few days a year. Also over sizing of the radiators rather a rule than exemption.

Ci radiators

@ March 16, 2013 3:53 PM in 95% Efficient Condensing Replacement Boiler

Cast iron radiators are perfect for high efficiency system and condensing boilers. As a rule radiators are oversized and will work on much lower temperatures of water 95% of the time. Because high efficiency systems are based on constant flow and variable temperatures of the water you do not need 180 F water temperature anymore, find good contractor with extensive experience in designing and building high efficiency systems. Scrap this contractor from the list.

DIRTMAG

@ March 14, 2013 9:48 PM in New Modcon old cast iron radiator system

This is DIRTMAG design.

DIRTMAG

@ March 14, 2013 5:38 PM in New Modcon old cast iron radiator system

I always install dirtmags on CI radoators system

Sentinel

@ March 14, 2013 5:21 PM in New Modcon old cast iron radiator system

I m using sentinel X400 for system cleaning and X100 for water conditioning.

Ibr doe

@ March 9, 2013 7:42 PM in boiler sizing

IBR = amount of heat radiators get from boiler. DOE =amount of heat IBR + heat loss in the transmission of heat from boiler to emitters. If piping is in conditioned space then it accounts as emitters, if in unconditioned space then it cannot be used as heat emitters and not counted as hear emitter. But when boiler starts from cold condition on design day temperature, then all mistakes in heat loss will show up. And when I see old gravity systems with 3" piping I m sure want to take this piping into account.
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