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gennady

gennady

Joined on January 27, 2011

Last Post on July 30, 2014

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nitrogen

@ July 30, 2014 12:16 PM in Brazing without nitrogen?!

When we did ac installations, nitrogen was a must. Triple evacuation only dries up copper, and testing shows the leaks. But brazing without nitrogen is a shortcut to lower costs. Anyway i heard that some plumbers do not use primer on PVC joints. so I'm not surprised.

Dirtmags

@ July 26, 2014 11:10 PM in Gennady ?

Thanks for nice word. You can get Caleffi dirtmags at American Universal Supply, Inc.
120 New South Rd, Hicksville, NY
(516) 348-7750
Ask Charlie or Scott.

Oil tank

@ July 25, 2014 11:25 PM in Cut oil tank in half, now what?

You must contact tank cleaning company before you cut tank. They clean tanks prior to cutting and disposal. Then master plumber of record must send affidavit to fire dept and dob.

old tread

@ July 24, 2014 1:23 PM in NG Combi Boiler versus indirect tank and boiler setup

NT

Ell

@ July 20, 2014 8:13 PM in Exhaust Ell turned wrong way:

Not to mention it has to be 12" above snow line. And ss mesh.and what is this pp pipe with elbow in the rear. Is this condensate discharge? They cannot discharge to outside. They will get an ice plug. Condensate must discharge into sewer system after neutralization.

Steam to hot water.

@ July 20, 2014 5:39 PM in Advice needed on heating system install

I get these requests all the time. What is about this obsession with steam to hot water system conversion. To do it right costs a lot of money. And still most of conversions done completely wrong and with poor craftsmanship. Instead of fixing steam system, what most of the time consists of installing proper venting,fixing pipe supports and near boiler piping, people run this pex all over, install unbalanced radiators or baseboards and oversized boilers.

Another old tread

@ July 19, 2014 9:23 AM in Baxi 1.33 Modulo or Navien CR-240

NT

Baxi

@ July 18, 2014 6:19 PM in Baxi 1.33 Modulo or Navien CR-240

Out of these 2 baxi is a winner. Modulo with tank is a very good boiler. Gianoni hx is a minus thou. But navien.? No way.

Condensing boiler.

@ July 15, 2014 6:43 PM in Mod/con poll. Installers only.

#1 No brainer. No matter what.
Mod cons are the best thing happened in residential heating in last couple decades. Modulation of boiler output is standard on commercial boilers and application of modulation in residential segment is really amazing development. Condensing will always happened when boiler is properly set up. I seen boiler condensing at temperatures way higher than 132F return. There is common believe that condensation happens only at dew point.
I always install dirtmags, do water cleaning and conditioning. X100 and X 400.
I stick with viessmann, don't want to deal with reliability issues
And what is the difference, CI radiators, baseboards, or what ever. It does not matter.
I always install VFD circulators on system side. Constant flow the way to go.
Wait, no thermostats, no zoning.

Taco

@ July 13, 2014 2:33 PM in hydroniCad

Taco has few very good programs on their site.

Tablet

@ July 10, 2014 8:06 PM in Tablets in the field - what do you use?

I use iPhone with Evernote. Evernote syncs with any device and notes can be made, photos, videos, sound files can be attached. iPad works as well, but I don't do heat loss at sales meeting. Only after contract signed.

Home made acid neutralizer.

@ July 10, 2014 7:59 PM in Looking to make condensate neutralizer

This is how we do it.

Control

@ June 20, 2014 8:31 PM in Can anyone identify this Honeywell Control?

This is one cool control. Not only it acts as a boiler aqua-stat, but stops circulator when temperature in the boiler drops below set point to prevent condensation.

Aquatherm

@ June 20, 2014 7:58 PM in Aquatherm piping

We got certified with Aquatherm, but immediate availability of the fittings in NYC is limited to one outfit with very bad reputation for stealing and cheating where I cancelled my account. Just cannot afford to wait for 2 days to get that one fitting.

Wish list

@ June 20, 2014 7:19 PM in I finally bought a brick

What about a tread, where suggestion on new site can be posted?

Delta T

@ June 18, 2014 7:45 PM in 95% Efficient Condensing Replacement Boiler

With 48F delta t you run into the situation of average water temperature in radiator going way down, heat rejection per square foot of radiation drops. To compensate this drop you need larger radiators. It is a matter of calculation, but increase in radiator size will be significant.

One riser.

@ June 12, 2014 7:41 PM in Any comments

With 1 riser you increase steam velocity in the pipe, make water level in the boiler uneven and increase amount of carry over water. You can do one riser as slant fin does, but size of this riser must be pretty large.

Tees

@ June 12, 2014 7:21 PM in Any comments

I install first tee as close to 90 as possible and as far from second tee as possible. Just move tee to the left. It gives time for carry over water to get to bottom of the pipe and slow down. Makes good steam and water separation.

Header

@ June 11, 2014 11:19 PM in Any comments

I usually install shut off valve on steam line to the system, and shutoff valve with blowdown valve upstream on return line to facilitate boiler blowdown and return line purging. And unions on all boiler pipes connections. Also I would give more distance between the 2 tees.
I would also go up in pipe size after first tee, so the first tee would be 4x3x3, and continue with 4" with 4" full elbow down on equalizer. Of course 4" might become 5" depending on boiler input.

less labor

@ June 4, 2014 3:05 PM in Forced air

actually if you do proper support it is more labor. and after you install 90 degree fittings it will be even more labor and much higher flow resistance.

Smoke

@ June 3, 2014 10:33 PM in Blue smoke from oil burner exhaust

Blue smoke might be a fuel vapor. If oil drips inside when burner is off and gets soaked in insulation, then when burner is on residual oil starts evaporating producing whitish bluish smoke. Just my 2 cents.

Copper

@ June 3, 2014 10:22 PM in Forced air

Why not use copper. What is actual reason for using pex?
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