Joined on January 27, 2011
Last Post on March 2, 2014
@ April 8, 2012 2:09 PM in Little Brass Cup-shaped thing above expansion tank is leakingThis air removal device. I always leave red cap loose, or remove it at all. If it leaks, replace it.
@ April 4, 2012 11:28 AM in Happening elsewhere?here is a very interesting article regarding spec build work, and i think this is why high efficiency heating will never work on public and spec build jobs.
Contractors Do Whatever They Want
by Ron Roberts
Deviating from plans and specs is common practice. The only instance that I can imagine a contractor not deviating from plans and specs is Corps work.
There are two primary reasons contractors deviate from the approved work scope.
1. The plans & specs are stupid, in error, in complete, or internally conflicting.
2. Nobody is playing cop with the field crews.
Reason number one should be self-evident to anyone who has looked at plans and specs closely. They were getting bad back in 1994 when I walked away from an engineering firm. When I next laid eyes on them next in 2005 I about fell out of my chair laughing. They were ridiculously shoddy.
Architects and engineers throw details on drawings and requirements in specs just in case they are needed. Nine times out of ten, the details conflict with each other and / or they are completely inappropriate for the building being delivered.
I don't blame the designers for this sickening trend. It's driven by the fee reductions and the errors and omissions liability claims forced on them by owners.
Contractors are forced to use their best judgment or do whatever they want. Option number two is available as NO ONE WATCHES THEM.
Back in the day owners paid design teams to spend considerable time on site making sure the contractors built the job right. That doesn't happen much anymore. General contractors certainly aren't going to make sure their subs do their work by the letter of the law. GCs are more concerned with getting the job done quickly and getting out of there.
Wishing you great success in 2012.
Guy and Ron
P.S. Want your business to grow fast? Put our
solutions into action. RISK FREE! Check it out here.
P.P.S. Questions or comments? You can reach
Guy at 773-870-6500 or Ron at 913-961-1790.
The Contractors Best Practices Newsletter is written
and distributed by Ron Roberts & Guy Gruenberg,
-All Rights Reserved
I did not post article fully, as the rest is not much relevant to the topic, but I reprinted it in full with author permission on my blog.
@ April 4, 2012 9:15 AM in Happening elsewhere?This is the reason we do design build only. I found complete lack of knowledge and inspiration in regards to high eff heating in engineering community.
@ April 3, 2012 10:01 PM in Happening elsewhere?Boiler works at design temperatures may be total 1 week in a year. Most of the times boiler works at much higher outdoor temperatures, and it allows to lower water temperatures, and it permits boiler to condense.
Radiation , installed for design temperatures, becomes over radiation at regular temperatures.
@ April 1, 2012 6:15 PM in Happening elsewhere?look into hamilton engineering products. they have multiple boilers with combined vent. they made it as single boiler product, but there are actually more than 1 boiler in the set.
@ April 1, 2012 6:08 PM in Boiler making loud noise when filling storage tank.taco 010 has 10' WC head available .
your storage tank has 7' WC head.
your boiler ( i found it to be low end BTW) does not publish head data for heat exchanger, But for gianoni heat exchanger it is somewhere in 20+ feet of WC. Add to this some piping and fitting, and i think you have to move to next big pump. you have probably lack of water flow, and water starts to boil in the boiler, and because this boiler does not have advanced protection features, you might damage this boiler. I might be wrong, but this is my opinion.
@ April 1, 2012 5:40 PM in Happening elsewhere?There is always ways to vent, just for each application there is proper equipment. If there is vent for atmospheric boiler, there is vent for direct vent boiler.
@ April 1, 2012 5:34 PM in Boiler making loud noise when filling storage tankAlso, on last picture i see probably piping to the indirect heater (left pump) before twin tee connection, but i do not see 2nd connection there. do you have picture showing indirect piping in more details?
@ April 1, 2012 5:30 PM in Boiler making loud noise when filling storage tankcould you provide pumps numbers (like 007 or 011) and speed they set to?
@ April 1, 2012 4:08 PM in Boiler making loud noise when filling storage tankwhat circulator is installed for indirect tank?
what size piping installed for indirect tank?
on what side of hydro separator indirect is piped?
@ March 30, 2012 9:25 AM in Steam or water system for old HotelI did remove this post and do apologize for it.
@ March 30, 2012 7:42 AM in Steam or water system for old HotelYou are absolutely right, design fee must be charged. we do it all the time , except the job is standard and repetitive, and some options can be included in proposal. we always charge fee for complicated or non standard jobs.
@ March 29, 2012 9:46 PM in Steam or water system for old Hotelthe main difference between conventional heating systems( hot water and steam ) and condensing modulating boiler is not in a boiler efficiency , but in system efficiency. Modulating boiler tracks load very tight, no overshooting at all, and provides exact heat as needed, while standard systems always overshoot the set points.
@ March 21, 2012 11:06 PM in Electronic water feeder/lwco for WeilMcClain Model 80just install small water meter on feed line
@ March 20, 2012 7:31 PM in Wanted - Heat Timer EPC panel for partsWhy don't you just make another cut out on the wheel?
@ March 20, 2012 7:19 PM in OKGas meter is a property of utility company, and they are decision makers on what size meter should serve your house.
@ March 20, 2012 5:45 AM in What do you think ofI used to work at power plants, and did a lot of services on economizers , which are integral parts of power boilers. I think what needs to be controlled is a dew point, up to chimney outlet, and negative pressure from firing chamber all the way to chimney outlet. This leads to complicated design issues, and with properly set up boiler there is not much heat to recover without damaging chimney and boiler.
@ March 18, 2012 6:55 PM in Lochinvar Knight boiler problemsAre you saying, you paid $38,000 for this mess?
@ March 15, 2012 11:10 PM in Condensing vs Modulating / CondensingWM GV+ not modulating , does not have outdoor reset, it is just cast iron weil mclain with stainless steel cooler on the side, why bother, just install regular hot water standard efficiency boiler , they prove to be easy sell, proven 50 year old design, and very cheap. WM come up with GV series as a mockery of high efficiency , just to give cheap boiler, with high efficiency rebates possibilities from utility company, so unqualified contractors could sell it under 90+ % efficiency to uneducated consumers. This puts a shame on formerly reputable boiler manufacturer.Just my 2 cents.
@ March 15, 2012 6:50 PM in Lochinvar Knight boiler problemsThis is what i mean. you calculated installed EDR, but how do you know this EDR is confirming to house heat losses? But in this case bigger is better. More radiation for condensing boiler is a very good thing. it allows to lower water temperature and make boiler condense more.
@ March 15, 2012 6:43 PM in Lochinvar Knight boiler problemsI do heat loss on each job i do a few different ways, one using HVAC-calc software , another with fuel bills and heating degree day methods, and i developed a feeling of right and wrong. i never go by the feelings, but it helps. i have yet to see private house needed 400MBH boiler. I consistently scare customers with my sizing, putting in contracts paragraphs, saying that i will replace boiler to bigger one at my own expense, because i was proposing boilers much smaller than my competitors, and yet when in the past we had 6F days in NY i did not get any call with complaints. So, i would say even 125k boiler will be probably over-sized too, but you can live with that. Also get rid of zoning as well. it is messing up condensing and modulation on your boiler.I know, there few contractors agree with me, but this is how i do things.