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SWEI

SWEI

Joined on November 26, 2011

Last Post on April 23, 2014

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Shouldn't cost much more

@ April 23, 2014 6:06 PM in What's your opinion on this design...

 than the boiler + RMB + extra labor + extra fittings.

Or buy a Viessmann

@ 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.

Sizing

@ April 22, 2014 12:25 AM in Best Value in Combination Hydronic / Domestic Boiler and radiators

will 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.

Had to go look that one up

@ April 20, 2014 10:31 AM in New Jersey hvac license

http://www.gravel2gavel.com/2014/02/new-jersey-extends-date-to-regulate-hvacr-contractors.html
Did NJ not have any previous HVAC licensing, only plumbing?

You guys are renewing?

@ April 19, 2014 8:42 PM in New Jersey hvac license

and they have to hold a meeting?

PPR transitions are a bitch

@ April 19, 2014 8:39 PM in 270 Ft Manifold

really 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.

Still waiting

@ April 19, 2014 3:58 PM in 270 Ft Manifold

for Aquatherm to come out with F1960 transition fittings. I know they have been looking at it.

Were you part of

@ April 19, 2014 2:50 PM in 270 Ft Manifold

the hangar job featured in the newsletter last year?

Aquatherm headers

@ April 19, 2014 1:10 PM in 270 Ft Manifold

seem 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?

Non-barrier polymer pipe

@ April 19, 2014 12:22 PM in CPVC in hydronic heating system

still 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.

Two-stage retrofits

@ April 18, 2014 12:35 PM in Twin Steam Boilers - 4 Stages of Firing Rates

are 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.)

Triple solenoid

@ April 17, 2014 1:09 PM in losing heat

might be what makes the Cold (70) setting work on some of the newer washers?  

I just ordered half a dozen

@ April 17, 2014 12:08 PM in Loctite 55

at that price and for under $11 in shipping, I figured what the heck...

Kiwi hydronics

@ April 17, 2014 11:46 AM in Modifications to Hydronic System

now 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.

Cv and valve sizing

@ April 16, 2014 10:09 AM in Modifications to Hydronic System

Optimal 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?

It would be interesting to know

@ April 14, 2014 12:33 PM in Help with Sizing a Boiler

if the connected EDR is actually 407 or 427.

Can you post a picture

@ April 14, 2014 12:21 PM in Boiler pressure rising

of the boiler and nearby fittings, valves, pumps, etc?

Tap on the expansion tank with a screwdriver handle.  What kind of sound does it make?

Do you have the TriMax Control Supplement?

@ April 14, 2014 11:23 AM in Two Circs - TT Prestige Excellence

Look at P.10 for details on the pump settings.

Do you have a tankless coil or an indirect?

@ April 14, 2014 11:12 AM in Boiler pressure rising

Have you checked the expansion tank?

I was thinking tubing

@ April 12, 2014 5:24 PM in Need help heating/pumping Six Oil

with 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.

Those two terminals

@ April 12, 2014 5:09 PM in Proper Wiring Help Needed

above the transformer have 24VAC on them.

Ran across this the other day

@ 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/
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