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RJ

RJ

Joined on February 3, 2007

Last Post on April 12, 2014

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tee

@ November 30, 2012 11:01 AM in Unwanted reverse flow between tees

I agree with all,  remember the law of the tee, what goes in tee must come out, still would like to see a schematic, you need some circut setters in your system to get it balanced.

flame

@ November 29, 2012 8:48 PM in Honeywell controller

you need to check your flame current, you will need a meter that checks microamps, there is a jack on the ra890 to plug in your meter you need a min. of 1.5-2 microamps, if you dont read this than many possibilities   dirty or rusted  pilot assy. cracked flame rod porcelain, low gas press, cracked or warped burner plate. to be safe call in someone who is good with this type burner, Power flame has a good tech help line  also some supply houses can bench check your ra890

flow

@ November 29, 2012 8:24 PM in Unwanted reverse flow between tees

looks like your primary loop is piped into your boiler, can you draw a schematic showing pump flow direction,  also recommend balancing valve on secondary loop as well as petes plugs on supplys and returns.

pneumatics

@ November 29, 2012 6:43 PM in Hurst steam boilers+pneumatics

just as the phrase dead men of steam we can use dead men of pneumatics, the men who are good on old pneumatics are slowly disappearing  I would look at it for you, I live in colorado. i am a retired Steamfitter.

pneumatics

@ November 29, 2012 11:55 AM in Hurst steam boilers+pneumatics

Most all old pneumatic systems failed to heat, when air press. was lost bldg would go to full heat. It is probably normal for the boiler relay to bleed off on a call for heat,  The 3 way valves on the wall are probably for day night changover.  day 15 psig,  night 18-25 psig.  or summer winter changeover,  summer 15 psig, winter 18-25 psig. check bldg thermostats to you which system you have. Are the tanks on the wall connected to the pneumatics ?  Some of the old systems had air compressors with little air storage so external tanks were used.

pneumatics

@ November 28, 2012 8:43 PM in Pneumatic controlled heating system changeout ( Ron Jr. )

I continued to work on large pneumatics in 2011, I retired in 2012 after 38 yrs as a steamfitter and 5 yrs as an instructor for pneumatics and hydronics,   I saw pneumatic controls go from the only control system in the 1970s to almost being obsoleted, I designed some retofits where I would use mh T775 and Johnson 4-20 ma controls to interface with pneumatic valves,relays and actuators  If anyone needs pneumatic help let me know.
Rick S

taco

@ November 27, 2012 2:34 PM in zone valve question

most hvac supply houses should stock them  Taco is a large manufact. of valves pumps etc

neg press

@ November 27, 2012 2:02 PM in High CO

Do you have a sealed boiler rm ?  check at the boiler rm door do you feel air being pulled from rm, if so get door to seal, also check this fan that was installed for fresh air, make sure fan rotation is right, make sure this fan and fresh air inlets were sized per code.   There is a company called Selkirk that can provide flue and combustion air tables. after shutting all external air moving equip.should only be a minute or so.

flue size

@ November 26, 2012 6:12 PM in High CO

check your flue size per boiler specs,  also as Phil said look for negative press in and around boiler rm.  look for bathrm or kitchen exhaust fans. they may be on intermittenly.

system pressure

@ November 26, 2012 5:56 PM in zone valve question

I believe the old taco valves were a slow opening globe valve design ( heat motor ) I believe the mh valve use a spring and rubber ball device, I would check both manufacts. for pressure drop and flow data   There have been water hammer problems in the past if the wrong valve is installed.  I agree with Steve.

pipe size

@ November 26, 2012 5:35 PM in The Mystery nobody can figure out

check your gas main to boiler is it the proper size, per burner manufact. is any thing else on that line like domestic hw or hvac equip. ?  If your burner is 580 mbh than you most likely need around a inch and a quarter to inch and a half line depending on how far from gas reg.  also check gas reg make sure orfice is the right size. I would also check the burner plate for cracks or to see if it is warped.

replacement

@ November 25, 2012 10:30 AM in relace those gas valves ?

I agree, In my case i was referring to a 1050 mbh Peerless cast iron sectional boiler, after completely cleaning burners and sections,  I replaced all press.controls, valves, regulators,pilot assy,s ,  flame safeguard controls and electrical wiring. 

relace those gas valves ?

@ November 24, 2012 4:47 PM in relace those gas valves ?

Anybody working on boiler contols, gas valves,gas regulators that have been underwater even though they may have been dried out may still have contaminates inside them. that could cause future failure. I had a job where the boiler rm. flooded due to a defective sump pump. The insurance co.wanted all the above replaced. as well as some of the parts manufactures.

dressler

@ November 20, 2012 11:35 AM in Dresser Compression coupling vs threading a steel pipe

I have used these couplings in different applic.  I used them alot to repair and replace steam condensate return lines. you need to check the gaskets that come with the coupling , for steam tou need the high temp gaskets (usually indicated by a green dot on the gasket.)  I would also coat both sides of gaskets with teflon pipe dope, never had any leaks

dressler

@ November 20, 2012 11:35 AM in Dresser Compression coupling vs threading a steel pipe

I have used these couplings in different applic.  I used them alot to repair and replace steam condensate return lines. you need to check the gaskets that come with the coupling , for steam tou need the high temp gaskets (usually indicated by a green dot on the gasket.)  I would also coat both sides of gaskets with teflon pipe dope, never had any leaks

steam

@ April 25, 2012 5:09 PM in New American Steam Heating Assoc. looking for your support!

let me know what help is needed  especially on the commercial steam side.  Live in the Denver area
RJ

leaks

@ April 17, 2012 6:06 PM in Buried copper piping leaks

another thing to check is if the copper pipe was reamed properly, pipe that is not reamed can cause a wearing out of the solder joint.

baseboard

@ April 17, 2012 5:58 PM in Expansion couplings

Sounds like you may have air in your system   I would suggest having a hydronic heating contractor take a look at it.

ticking

@ March 26, 2012 7:13 PM in Steam pipes ticking noise

Dont know the NYC codes but insulating steam lines has always been crucial.  Look in Dan's book  (lost art of steam heating  page 222  ).

ticking

@ March 26, 2012 6:02 PM in Steam pipes ticking noise

Find out if the riser piping is insulated, uninsulated piping coud be part of your problem even if it is several floors below or above you, It will require opening up walls.

noise

@ March 15, 2012 8:29 PM in Air vents on two pipe system

Some of the old bldg's I worked at in San Fran.  had various types of pipe noises, after eliminating all the obvious problems, found the risers in these 90 year old bldg' were never insulated, this plus loose pipe supports was causing the problems. I did have to open up the walls to find the problem, The bldg owner was given a quote to correct the problem which was going to be quite a job. never heard back.

1 pipe

@ March 7, 2012 3:26 PM in 1 pipe steam

Thanks,  thats it,   you were a great help.
RJ   
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