Joined on November 26, 2011
Last Post on April 23, 2014
@ April 23, 2014 6:06 PM in What's your opinion on this design...than the boiler + RMB + extra labor + extra fittings.
@ April 23, 2014 6:02 PM in What's your opinion on this design...and let it manage the mixing valve with the onboard controls.
@ April 22, 2014 12:25 AM in Best Value in Combination Hydronic / Domestic Boiler and radiatorswill be important here. In that climate, 1,000 square feet won't have much of a heating load, unless it's one of those mid-century glass and steel things. The Prestige Excellence is probably 5x as big as you need for heating, yet its hot water capacity is inadequate for a soaker tub.
@ April 20, 2014 10:31 AM in New Jersey hvac licensehttp://www.gravel2gavel.com/2014/02/new-jersey-extends-date-to-regulate-hvacr-contractors.html
Did NJ not have any previous HVAC licensing, only plumbing?
@ April 19, 2014 8:42 PM in New Jersey hvac licenseand they have to hold a meeting?
@ April 19, 2014 8:39 PM in 270 Ft Manifoldreally the only thing in their whole system which is not competitively priced. As a result, I put some effort into minimizing the number required. Aquatherm uses DIN standard socket fusion (hence the number of tool vendors we are starting to see.) The fusion saddle outlets are apparently unique to Aquatherm.
Asahi ball valves are available in PVC, CPVC, PP, and FPM/FKM. Ther PP fittings use DIN standard socket fusion. If you need to transition from Aquatherm to any of those, you can order a ball valve for the other system and then add on a PP union tailpiece. Weld the Aquatherm to the tailpiece (after the union nut) and voila! You now have a PP-R to CPVC transition with a shutoff.
@ April 19, 2014 3:58 PM in 270 Ft Manifoldfor Aquatherm to come out with F1960 transition fittings. I know they have been looking at it.
@ April 19, 2014 2:50 PM in 270 Ft Manifoldthe hangar job featured in the newsletter last year?
@ April 19, 2014 1:10 PM in 270 Ft Manifoldseem to be gaining in popularity on larger RFH projects. Nice that you can bury the welded joints. What size are the mains? Looks like maybe 110mm?
@ April 19, 2014 12:22 PM in CPVC in hydronic heating systemstill has a place in the ecosystem as long as it is deployed properly. Aquatherm does not have an O2 barrier, but as long as it's used mostly for larger distribution lines (where most of us find it makes the most sense anyway) there should not be a problem. http://www.aquatherm.com/downloads/bulletins/201308B-AQTTB-Oxygen-Permeation.pdf
My own experience with combination systems using hePEX and Aquatherm with large numbers of steel panel radiators is that we see a bit of fine magnetite (aka general corrosion) during the first few weeks of operation as the system de-airs itself. Once the system is fully purged of air, we turn off (or remove) the autofeeder and verify that pressure is maintained. At that point, the amount of magnetite decreases, eventually stabilizing at a low level.
@ April 18, 2014 12:35 PM in Twin Steam Boilers - 4 Stages of Firing Ratesare something I need to learn more about. Data sheet above took a little decoding. 2-stage LP starts at 480k, NG at 300k. Not a lot of info online for these http://www.uni-line.com/modules/catalog/Product.aspx?singlePart=false&prodID=64690
Nice work (as usual.)
@ April 17, 2014 1:09 PM in losing heatmight be what makes the Cold (70) setting work on some of the newer washers?
@ April 17, 2014 12:08 PM in Loctite 55at that price and for under $11 in shipping, I figured what the heck...
@ April 17, 2014 11:46 AM in Modifications to Hydronic Systemnow I recall your earlier posts. 15ºC is just fine for the boiler, but I would still do a heat loss calculation before you assume the boiler does not need a buffer tank.
@ April 16, 2014 10:09 AM in Modifications to Hydronic SystemOptimal sizing will deliver full valve authority, which is critical in mixing applications. We usually aim for a pressure drop of about 4 PSI across the valve at full flow (translation: GPM = 2 x Cv.)
A few more basic questions: Why are you assuming 15ºF ∆T on the boiler? What is the design day heat loss for the structure? Does the boiler have sufficient water volume without adding a buffer tank?
@ April 14, 2014 12:33 PM in Help with Sizing a Boilerif the connected EDR is actually 407 or 427.
@ April 14, 2014 12:21 PM in Boiler pressure risingof the boiler and nearby fittings, valves, pumps, etc?
Tap on the expansion tank with a screwdriver handle. What kind of sound does it make?
@ April 14, 2014 11:23 AM in Two Circs - TT Prestige ExcellenceLook at P.10 for details on the pump settings.
@ April 14, 2014 11:12 AM in Boiler pressure risingHave you checked the expansion tank?
@ April 12, 2014 5:24 PM in Need help heating/pumping Six Oilwith a trailer-mounted boiler, perhaps a rental. On a hot day.
http://www.jmesales.com/ sells a lot of useful stuff, but 20k gallons is a lot of mass.
@ April 12, 2014 5:09 PM in Proper Wiring Help Neededabove the transformer have 24VAC on them.
@ April 12, 2014 3:42 PM in What do you think of when somebody says Hydronics?and thought it was quite well done http://modernfarmer.com/2014/03/real-talk-milk/