Joined on February 3, 2007
Last Post on May 20, 2013
@ February 1, 2013 10:32 AM in Air lockAre there automatic air vents on top of air seperators, if so they could be drawing air into system especially if your n.p.s.p ( net possitive suction press, ) at your pump goes below 0 psig. I recommend all air vents on hydronic systems be valved off after initial fill and bleed. pictures would be good
@ January 31, 2013 1:32 PM in economite 150-c thermalcoupleIts been awile since I have worked on one of these, In alot of jobs the burner itself was supported by the stand as you can see, where the burner tube is attached to the boiler is sealed with refractory type cement which you need to remove to get burner out. The burner may be attached with clip style fasteners to the boiler, Before you remove the burner order some Greenpatch 421 cement 5 gals is about $65.00. you will need this when reattaching the burner to seal the blast tube to the boiler. Alot of these old burners were set in place like this, now day burners come with mtg. plates and tube plates for most installs. Before pulling burner check for an access panel to get to pilot assy. on back or side of burner, I used to have an I.O.M on this burner sorry could not find.
@ January 30, 2013 4:56 PM in A new sectionThanks I have all that, I mentioned it because I thought it would be a good topic
@ January 29, 2013 12:13 PM in No power coming to the circuit boardcheck your blower door switch
@ January 28, 2013 2:51 PM in A new sectionI think one of the most misunderstood yet critical parts of our trade is flue sizing and application, Maybe some info on flues can be shared as needed at this new category. I found the Selkirk co. has great info.
@ January 27, 2013 1:57 PM in Need help buying TRVCheck my post Feb. 9th 2012 good info
@ January 25, 2013 5:20 PM in Is it easy to change a bleeder valveSorry should have been clearer, its 1/8 inch ball valve, male x female or use a 1/4 inch and reduce
@ January 25, 2013 3:15 PM in Is it easy to change a bleeder valveThats an auto vent, you dont want that there, relplace it with a key vent, coin vent or 1/8 inch jomar valve ( ball valve). you will need to drain the system press. and lower the loop temp. when the job is done you will need to vent and purge system. recommend you get a pro not a job for a homeowner
@ January 22, 2013 11:06 AM in Multiple zone valve wiring.Good schematics on line, look up taco 570 zone valve wiring
@ January 21, 2013 8:05 PM in Staged pressure controlsThis may help, Lattner boilers are used alot in spas and gyms for steam rooms
@ January 21, 2013 2:53 PM in commercialThanks Dan I have 38 yrs exp in commercial boilers (low and high press ) as well as large recip. chillers, large refrig systems and pneumatic controls. i am retired and have plenty of time to answer what I can
@ January 21, 2013 11:47 AM in categoryWould anyone like to see a commercial hvacr category at the wall
@ January 20, 2013 6:34 PM in Direct Exchange GeothermalReminds me of the solar hw systems of the 1970's Alot of people with limited hvacr experience installing these systems. I worked on 1 that utilized a well system, the refrig. systems would trip on high head press. when the grout material in the wells was dry, worked ok when the ground around the well area was moist, after it rained. proper design and install is crucial.
@ January 20, 2013 1:06 PM in 0013 taco circulatorSorry I have mistated, I dont use auto vents on hydronic systems unless they have a shutoff valve before. When piping up a hydronic coil I install shut off valves on the supply and return lines, a circut setter on the return, a control valve where used, and 2 petes plugs, I pipe in tee with a ball or gate valve with a pipe x hose fitting at top of coil and drain valve at bottom of coil, this allows troubleshooting this coil for flow problems I have always had the best results bleeding systems at the highest point in system, better to bleed with pumps off. I have used the purge technique to success when I did not have high points in system
@ January 20, 2013 10:20 AM in 0013 taco circulatorReminds me of a job years ago, AHU in attic area had no flow, installer had not installed valves on coil for venting air, we installed a saddle valve ( type used to hook humidifier to water line ) on the coil copper piping and were able to get out air stuck in the top of the coil, and get flow, returned later in week an repiped, installing drains and high point air removal valves
@ January 19, 2013 11:58 PM in 0013 taco circulatorOne of the rules of the pipefitter Always provide a way to vent the high points and drain the low points.
@ January 19, 2013 11:39 AM in 0013 taco circulatorYou need to start by checking pipe size to btu's, and TEL total equivalent length (pipe length + 50% for fittings), also press. drop through equip. When you have this you can use a pump curve ( selection chart ) to size the pump. Remember in closed loop systems height is only considered in the cold fill pressure. should be at least 5 psig at very top of your bldg piping. Every 2.3 ft of height will equal 1 psig . In your case you need at least 26 psig plus 5psig = 31 psig. at your boiler. In some cases relief valves need to be changed to higher press. setting. I would get the cold fill press. up, and bleed top of system, try that first. you may need to install valves at the top of your system to get air out.
@ January 18, 2013 11:15 AM in BOILER SIZING...GAS , STEAMwhats the size of the old boiler, I ran into the same problem, I had to use size of old boiler and take in account that the old 1940 boiler had a side arm domestic water heater. I did put in a disclaimer in the bid
@ January 17, 2013 6:19 PM in zone valve questionNot sure what style you have, the old WR zone valves had a stem assy that sat inside a valve body, after some time the stem would where allowing some flow through valve body causing overheating even though the zone was not calling for heat, One way to tell would be to isolate that zone by shutting it off with a gate or ball valve
@ January 17, 2013 5:27 PM in electric duct heaterwhere does the duct go, AHU ? MA unit, sometimes these would be installed to try to correct a miscalculation on original design or reheat of new zone that was added.
@ January 16, 2013 2:05 PM in Power Flame JR30A-12 locking out frequentlyFirst thing get an I.O.M. for burner. what's it locking out on. may be a gas press. problem. Pilot and rod can be cleaned. You may need to pull the burner to check the diffuser plate. If your not familiar with this burner you may want to get a second set of eyes on it pictures ?