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Joined on February 3, 2007

Last Post on April 12, 2014

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Boiler feed pump

@ October 4, 2009 12:59 PM in Boiler feed pump

Installing boiler feed pump on 1 pipe system, how close does pump need to be to Peerless boiler. have 5 dry vertical returns currently connected to a header which ties into boiler return line. Would like to install pump around corner from boiler ,about 15 ft. return lines are 1-1/4 what size should main return to boiler feed tank be ?. what size pump discharge line. Boiler is 211-A-07  tank is Hoffman Duplex 50 gallon.

one pipe

@ August 16, 2009 8:16 PM in one pipe

Contractor remodeling 10th floor of 80 yr old bldg (one pipe steam system), architect wants to relocate radiator location and use steamview steel radiators.  Old cast iron radiators were approx. 18" from riser.  New location to be approx. 15' from riser with 4- 90 degree turns.  Will this work if pipe size is increased?  Would like Dan's input on this one if possible.

@ July 31, 2009 5:18 PM in Copper lines for radiators

Thanks for your inputs. I am on my 2nd Lost art book , wore out the 1rst one. Steamin since 1974. Just thought I would get some 2nd opinions ,I have learned after 35 yrs. in the trade, never be to proud to ask a question.

copper lines on radiators. (1 pipe steam)

@ July 30, 2009 11:15 PM in Copper lines for radiators

I am replacing old cast iron radiators with new steamview steel tube radiators in a 90 yr. old 11 story bldg. Have 2 problems. (1) New radiators are relocated approx. 16 ft. from there respective risers, the old cast radiators were about 18 inches away at 1 inch pipe. Not sure if pipe should stay at 1 inch. (2) Do to little room to run piping, thinking of running small amounts of horiz. pipe to rads. using type L copper with brass nipples. I have used this in the past on industrial steam tables with success. Any suggestions?

steel radiators

@ July 23, 2009 5:05 PM in steel radiators.

After removing cast iron column type radiators from old Pacific Heights bldg. in San Francisco, have some questions. contractor wants to use steel vertical tube radiators ( Any pros or cons. the system is a 90 yr. old 1 pipe down flow. Currently operating at 2 psig. also contractor wants to change a small amount of piping close to radiators to copper to allow piping to fit closer to wall. Cast iron to copper to steel, does'nt sound to good.

@ May 13, 2009 8:17 PM in leak in boiler

Thanks. Boiler is 15 yrs old. Suspecting 2 things 1. not proper swing joints at header and or to much city water into boiler no boiler feed pump.

leak in boiler

@ May 13, 2009 7:58 PM in leak in boiler

Have a Peerless 211A 07 7 section steam boiler, with a small leak coming from the front left of boiler above the burners. Unable to determine at this time if it is a crack in a section or a leaking gasket. Any one had any luck with boiler sealer products like Hercules boiler seal for a long term repair. This is aone pipe system so any left over chemical by-products would end up going through #40 air vents in occupied spaces.

Gas pressure.

@ May 7, 2009 11:50 PM in Laars

Is there any new gas appliances operating off the gas meter. Have your utility co. check gas pressure and gas meter. Tele. Larrs locks out on ignition failure only.

If autofilled

@ May 4, 2009 8:57 PM in Steam Boiler Overfilling

I have seen some boilers overfill if the M-M SA101-- fill valve strainer or entire valve is plugged up. The strainer is removeable. Also the fill line may be plugged where it ties into boiler return line. In both cases the automatic fill valve sees a big pressure drop holding the valve disc off the seat, overfilling the boiler. In most cases this happens over a long period of time. Check condition of low-water cutoff if it has not been serviced in years, you may want to replace it. Also check 1/2 or 3/4 inch line at return piping.


@ May 2, 2009 2:24 PM in setting up forced draft burners


@ May 1, 2009 8:08 PM in setting up forced draft burners

looking for info on burners for boilers p.s. posting from west coast.

@ April 30, 2009 9:18 PM in setting up forced draft burners

Anyone have detailed info on setting air dampers and gas pressures, (gas/air mixture). showing a good starting point for gas forced draft burners, fixed fire and modulating.

old bldg.

@ March 10, 2009 10:03 PM in Interesting piece of Denver history

Dave check out the gravity HW system in the Grant Humphries mansion I worked on that system back in the mid 1980's I worked for a now defunct Midwest Mechanical Systems at the time. We converted old coal burners into natural gas. I think tours are available.

@ February 26, 2009 8:16 PM in looking for carrier vvt controlers and boxes for gen1 and 2.

Looking for carrier vvt controlers and boxes for gen1 and 2

@ October 16, 2008 10:57 PM in looking for I.O.M. manuals for thermopak boilers

looking for I.O.M. manuals for thermopak boilers

foot of head

@ August 27, 2008 10:13 PM in Anyone heard this rule of thumb?

If a pipe is filled with water 2.31 ft. the pressure will be 1psig. It is recommended to have at least 5 psig. at the highest point of the system , to help with air removal. Example: A system with a pump in the basement and a 20' height to the top of a solar panel would figure as 20'divided by 2.31 = 8.6l lbs. add 5 lbs. total static press. = 13.61 lbs.


@ August 20, 2008 10:37 PM in Flue gas booster fan

Get a hold of these guys. 800-992-vent (8368).

@ August 20, 2008 10:27 PM in Controling the heat in individual steam heated apartments

lets make that radiators


@ August 20, 2008 10:25 PM in Controling the heat in individual steam heated apartments

If using Danfoss air vent control valves on a 1 pipe system you will need to cycle the boiler off numerous times allowing air to reenter the radiator or baseboard unit. That's the only way it will work. If you dont the radiarors will never shut off.


@ August 20, 2008 9:44 PM in Chilled water reset controls... (ME)

Johnson controls has a A350/S350 series you can use to reset chill water.


@ January 14, 2008 6:31 PM in 2 pipe Hydronic system

How does the system you have seen work ,what is the sequence of oper.

2 pipe hydonic system

@ January 13, 2008 10:56 PM in 2 pipe Hydronic system

I recently looked at a 12 story condo bldg. circa 1967. It has 12 Hydrotherm modular boilers for heating. 6 of these are also piped through heat exchangers for domestic HW. There are 2 Carrier recip. chillers. the old style control system switches from heating to cooling depending on OA temp. The system does not have 3 way changeover valves or chiller bypass valves. The system does have check valves on the suction side of the chill water pumps. It looks like the mechanical side was originally designed as a manual changeover system, but current engineer is running it as an auto changeover system. There is a control to keep the chillers off line untill loop temp. drops below 100 degrees, but in the heating mode,hot water is migrating into the chiller. I am thinking that maybe the check valves are leaking through. Anyone seen a system like this?
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