DIY Chatroom Home Improvement Forum

DIY Chatroom Home Improvement Forum (http://www.diychatroom.com/)
-   HVAC (http://www.diychatroom.com/f17/)
-   -   gas valve (http://www.diychatroom.com/f17/gas-valve-181956/)

dompro28 06-16-2013 09:39 PM

gas valve
 
I just installed a ruud 80 energizer gas furnace(used) and when I fired it up (hooked to natural gas) I only get the first chamber to fire,(there are 4)and then it goes out due to flame sensor not sensing a flame.I took it all apart,chambers are clean.Entire manifold is clean.Orfices are not plugged.One thing I did notice is orfices are very big,perhaps person who had furnace before me had propane and that is what is keeping all chambers from firing.Unit fairly new and any help would be appreciated thanks!

beenthere 06-16-2013 10:04 PM

Do a search for the install manual to find out what size orifices should be in it.

FClef 06-17-2013 01:15 AM

Natural gas orifices are larger than propane ones due to operating pressure of the gas. However, if you look on the orifice it should have a number stamped on it.

hvac instructor 06-17-2013 06:49 AM

What are the gas pressures befor and after the vavle? you'll need a manometer to check.

dompro28 06-17-2013 07:52 AM

Quote:

Originally Posted by beenthere (Post 1202381)
Do a search for the install manual to find out what size orifices should be in it.

Can you think of any other reason the entire manifold would not fire if the orifices are correct?Have you ever seen this before?thanks

dompro28 06-17-2013 07:53 AM

Quote:

Originally Posted by FClef (Post 1202445)
Natural gas orifices are larger than propane ones due to operating pressure of the gas. However, if you look on the orifice it should have a number stamped on it.

Have you ever seen this before.Very odd only first chamber fires.Anything else could possibly cause this to happen?thanks,Dom

dompro28 06-17-2013 07:57 AM

Quote:

Originally Posted by hvac instructor (Post 1202496)
What are the gas pressures befor and after the vavle? you'll need a manometer to check.

Would a bad gas valve cause this to happen.It is an electronic valve,don,t know if it is a 2 stage or not.Have you ever seen or heard this happening before?Very strange thanks,Dom

old_squid 06-17-2013 12:20 PM

Have I ever seen this happen? Hundreds of times.
Can the gas valve be causing it? Possibly, but doubtful.

Let's start with the terminology. The "chamber" is not what is lighting, it's the burner.

You have the first of multiple burners lighting. This burner is next to the ignition source. IE: hot surface ignitor or spark of some sort.
The flame from the first burner is not traveling to the subsequent burners and eventually to the last (furthest from ignitor) burner and because of this the flame sensor is not sensing flame and the safety control is shutting the gas valve off.

When you removed the burners did you check to make sure that the means for the flames to jump from one burner to the next was/were clean? These are called cross overs, because they allow the flame to cross from one burner to the next.

You said you connected it to natural gas, but was it on natural gas in it's previous application?

To set up a gas furnace correctly the minimum you need is some means to measure gas pressures. Do you have such a thing?

dompro28 06-18-2013 07:56 AM

I removed the manifold,everything was clean and flame should have jumped.The first time I fired up the furnace all the burners fired,blower went on but the air coming out of the registers wasn't warm,almost felt like just the fan was on.After a 5 mins or so I started having present problem.I don't have a manometer to measure pressure.

beenthere 06-18-2013 03:47 PM

Without a manometer. Your at a stand still. Either make one, buy one, or gt a tech out.

dompro28 09-26-2013 08:18 PM

I am thinking unit set up for propane anybody know what size orifice should be for a ruud achiever series quiet 80,model rgpn?

FClef 09-27-2013 08:51 PM

Quote:

Originally Posted by dompro28 (Post 1246889)
I am thinking unit set up for propane anybody know what size orifice should be for a ruud achiever series quiet 80,model rgpn?

Should be on the documentation for the furnace. The spec plate may have that too. But you have got to see that your pressures are correct and if you haven't done that, you are at the same place you were before.

ben's plumbing 09-28-2013 06:35 PM

look at the gas valve if it was converted to LP it should have a sticker stating such....ben sr

FClef 09-29-2013 12:15 PM

Quote:

Originally Posted by ben's plumbing (Post 1247427)
look at the gas valve if it was converted to LP it should have a sticker stating such....ben sr

If it hasn't fallen off or was never put on by the tech. Can't just go by a sticker, I sure wouldn't.

ben's plumbing 09-29-2013 04:22 PM

Quote:

Originally Posted by FClef (Post 1247631)
If it hasn't fallen off or was never put on by the tech. Can't just go by a sticker, I sure wouldn't.

your right can't just go by a sticker....as a tech I would not either..but as a diy with limited knowledge and tools sometimes simple things help the most to fix a problem...ben sr


All times are GMT -5. The time now is 09:30 PM.