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gennady

gennady

Joined on January 27, 2011

Last Post on September 2, 2014

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blended temperature

@ September 2, 2014 10:37 AM in Viessmann Temp Sensor w/ Caleffi SEP4 Hydraulic Separator??

Isn't it what we want? Outdoor reset sets system inlet temperature, and this is system outlet pipe on separator. Even on Viessmann's LLH we install strap on sensor , not in the well.

Sensor.

@ August 30, 2014 11:19 PM in Viessmann Temp Sensor w/ Caleffi SEP4 Hydraulic Separator??

Install sensor on the outlet of separator to the heating system. Strap on. Even with viessmann LLH it is recommended. All you need is to control temperature of the water to the system.

Chimney company

@ August 19, 2014 10:26 PM in who builds?

This is specialty work. Find good chimney company.

Interpretation.

@ August 17, 2014 11:33 PM in Gas Piping - teflon tape

Sure. There is no Teflon tape allowed in nyc on gas lines. This is only interpretation inspector has. I also do not allow Teflon tape on any treaded joint on our jobs. All these fillers being applied to mask poorly made tread. Properly treaded pipe does not need any filler or glue. Just a matter of proper tools and know how. And I'm not that one old timer. We do condensing boilers all the time and are using Propress for a few years already. We are certified for Aquatherm and installed quite a few Cogen systems as well. But threaded joint must be done with pro dope. This is according to my understanding of a nature of treaded joint.

Gas piping

@ August 16, 2014 7:22 PM in Gas Piping - teflon tape

Gas piping installation is regulated by NYC fuel gas code. Pipe dope is listed, Teflon tape is not. Code is permissible . It means it allows listed materials and methods. If method is not listed, it is not allowed. I'm following code to the letter when I do our installations in NYC.

Pro dope

@ August 16, 2014 1:17 PM in Gas Piping - teflon tape

The nature of treaded joint is fusion of molecules of joining metals. When treaded joint is made , great pressure is created between fitting and pipe tread. All we need is lubrication and polishing of joining surfaces. This is a pro dope. Mixture of oil and polishing particles. It is similar to welding. Anything in between joining surfaces only does harm.

Pro dope.

@ August 16, 2014 7:35 AM in Gas Piping - teflon tape

Gas line must be done with pro dope. And nothing else. No Teflon tape on gas line will pass NYC inspection

403.9.3 Thread compounds. Thread (joint) compounds (pipe dope) shall be resistant to the action of liquefied petroleum gas or to any other chemical constituents of the gases to be conducted through the piping. Use of cotton thread (lamp wick) is prohibited.
403.10 Metallic piping joints and fittings. The type of piping joint used shall be suitable for the pressure-temperature conditions and shall be selected giving consideration to joint tightness and mechanical strength under the service conditions. The joint shall be able to sustain the maximum end force caused by the internal pressure and any additional forces caused by temperature expansion or contraction, vibration, fatigue or the weight of the pipe and its contents.

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?
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