Gas System Check - HVAC - Page 2 - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC


Thread Tools Display Modes
Old 10-01-2012, 11:49 PM   #16
Join Date: Oct 2011
Location: PA
Posts: 5,918
Rewards Points: 582

Originally Posted by carmon View Post
nothing good gonna come of this.... my lips are sealed.... read some books
agree carmon i was trying to be nice...but he's going to dig his own grave.....hope they have mercy on him


ben's plumbing is offline   Reply With Quote
Old 10-02-2012, 12:01 AM   #17
Join Date: Jun 2009
Posts: 199
Rewards Points: 150

hum, I am reading a book, the text book from when I got certified. what am i missing? If this book is incorrect I need to know. When we were doing labs in back in school that is what we looked for.

ok I just had it backwards i was think lp but saying natural. then I started reading carbon dioxide content went off there for a while.
so 3.5 in. WC

So back to my original question, no combustion analyzer huh?

Last edited by wetbar; 10-02-2012 at 12:31 AM.
wetbar is offline   Reply With Quote
Old 10-02-2012, 01:08 AM   #18
Join Date: Jun 2009
Posts: 199
Rewards Points: 150

hey one last question was thinking about purchasing the fieldpiece addon manometer since I have all the other heads

what do tall think about the digital over the gauge? It does not cost that much more, but is it worth the extra?

other recommendations?
wetbar is offline   Reply With Quote
Old 10-02-2012, 01:22 AM   #19
Still Learning
Join Date: Oct 2009
Location: Los Angeles
Posts: 338
Rewards Points: 250

The fieldpiece manometer is cool, unless the batteries get low or your meter gets stolen, then the head is useless
thehvacguy is offline   Reply With Quote
Old 10-02-2012, 05:07 AM   #20
An old Tradesmen
Join Date: Oct 2008
Location: Somewhere
Posts: 34,402
Rewards Points: 7,794

Originally Posted by wetbar View Post
What do you mean pressure? Nat gas is 11.7 - 12.2 of WC for perfect combustion. I know Propane is a little higher, but we mainly see natural gas around here. Am I wrong?
Nat gas is not 11" at the manifold. Look at the data label on the gas furnaces you currently work on. Inlet pressure may be listed that high, but manifold will be listed as 3.5". The pressure variance will be listed to be between 3.2 and 3.8". if you need to adjust the manifold pressure lower or higher then that, then you are suppose to increase or decrease the size of the orifices, to allow for the BTU content of the gas in your area.

If you didn't know any of what i just typed. then you really do need to get more training on gas furnaces, before you do set ups, and before you do too much more servicing of them.

Few sealed combustion furnaces can have their manifold pressure checked by just connecting the manometer to the manifold side of the gas valve.

I find very few pressure switches that are actually bad, usually, something else is wrong.
beenthere is offline   Reply With Quote
The Following 3 Users Say Thank You to beenthere For This Useful Post:
ben's plumbing (10-02-2012), COLDIRON (10-02-2012), hvactech126 (10-02-2012)
Old 10-02-2012, 08:07 AM   #21
Missouri Bound's Avatar
Join Date: Apr 2011
Location: Almost Arkansas
Posts: 2,764
Rewards Points: 2,000

Originally Posted by JJboy View Post
This is related to photography .... means not shooting in automatic (A)
Photography was a strong hobby of mine many years ago...and now it's could have gone either way!


Do you want it your way or the right way?
Missouri Bound is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
New Sump System - Sewer Gas peterhil Plumbing 0 02-28-2012 03:53 PM
Installing Pool System New v. Used? flowerchick General DIY Discussions 5 10-27-2011 07:28 AM
Permit For Fire Sprinklers letnes Plumbing 18 10-14-2010 05:23 PM
beware humidity system? Emaderton3 HVAC 5 02-10-2010 11:52 PM
Which heatings system should I go with? keano016 HVAC 5 12-01-2009 02:53 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1