Tempstar

[whitesheatcool]

I ran across a new Tempstar furnace today, as I was called for an odors complaint. This furnace, mid eff., is about 3 mos. old. I noted cylindrical "baffles" at the beginning of the exchanger - LP gas 2stage- And noted the "baffles" were warped from the heat of the flame. My question is, Is this a new "design"? I would think that if there are baffles, they should be located further in, if not at the end of the heat exchanger, to hold in the heat and not at the beginning where there could be combustion problems. Does anyone know what I am rambling on about? - just curious. Everything else checks o.k. ie: Pressure in/out

[rtu]

Haven't seen the new ICP's furnace's yet,
Sounds like your talking about turbulators?
Are they white in color about 6" long and twisted like?
Alot of the choo choo's gas packs have them.

[whitesheatcool]

Well, they are about 6-8 inches long, stainless?, tube/cylindrical with holes. I guess turbulators sounds good, but not sure the purpose of it. I am no engineer, but I think the location of them would hinder combustion/efficiency. I have not seen this setup in any other units, and am wondering if this would cause the odors of "exhaust smell" as the customer puts it. No CO found though. It is an intermitant problem

[rtu]

I'm no engineer either,
I believe they use the turbulators to swirl the incoming flame much like in a turbo torch for example to get a hotter flame, possibly better combustion.
I'm sure someone will come along with a for sure on that.

[Edited by rtu on 12-30-2005 at 08:31 PM]

[stonefly]

did you check the heat exchangers close? when those change shape they can impinge the flame to where it bears right onto hx.i yank them out unless they are the white fiber type as the other problem is that the metal decaying in the flame produces "dust" that causes intermittant failures in the air switch.

[nmujjohn]

The new Tempstar furnaces have plain old in shot burners just as they have for many years. However it sounds as if you have a Low Nox unit. The inserts, if found on the burner side of the chamber do indeed become very hot. This heat in turn helps to re-burn the products of incomplete combustion.

[cem-bsee]

stonefly: don't

[hvacprodmgr]

Best way to find out:

#1) Are you in California ?
#2) Full model and serial number ?

[Keith Lohr]

check with the tempstar supplier, most that I have installed in the past the conversion instructions said to take the tubulators out, but check first, they warp because of the heat produced from lp gas

[Jultzya]

Originally posted by whitesheatcool
I ran across a new Tempstar furnace today, I noted cylindrical "baffles" at the beginning of the exchanger

Old style "Twist" Nox, diagram "EE"



New style "Perf" Nox, diagram "circle"

LP gas 2stage- And noted the "baffles" were warped from the heat of the flame.

WARNING!!!

My question is, Is this a new "design"?

Nope, it's been out for quite some time... California emissions requirements.

I would think that if there are baffles, they should be located further in,

Nope, they heat up and act as a catalytic converter. Aiding in the combustion process, lowing the overall CO emissions.

This should pretty well clear this matter up, Eh?

[whitesheatcool]

I would like to thank all of you, especially "Jultzya", for your helpful info. This clears up every question and concern.