Results 1 to 11 of 11
Thread: Furance problem
Hybrid View
-
07-05-2008, 11:43 AM #1
Furance problem
Hi to you all
I had a problem with a gas heater and hope to find here someone with expiriance in the field that can give me a tip.
The problem is this:
Gas ducted heater......besic one with no draft inducer etc'
Consist of stand alone pilot,gas valve,simple thermostat(on-off,temp set).
The problem is:
the pilot is lit and when you call for heat the burner lit--no problem.
After a while I shut it and wait a few minutes and call for heat again------sometimes its re lit ok but some times there is a big WOOOF and a big flame an thats it.....probably the big WOOF is shuting the pilot and the unit stops working.
I must say again: old fusion heater, no pc boards just a basic heater.
I must say that I have checked the press' and its ok
Also the fan is working ok and continue to work for a while after temp is met.
I am trying to think about faults but allways come to:"if there was a problem then it will do it in the first time and not in the second or third"
I will appriciate any comment on that.....maybe someone came across problem like this
Thank you all
-
07-05-2008, 07:52 PM #2
Re: Furance problem
What you really need is a combustion engineer to look at it for you.
It sounds like problem either with the burner pressure or the jets.
But these type of appliances are dangerous and it's no way I can diagnose it thousand of miles away.
-
08-05-2008, 12:33 AM #3
Re: Furance problem
Could be a flueing problem, as The Viking suggests, get in a local expert.
It will be cheaper than an exploded heater or a hospital visit.Brian - Newton Abbot, Devon, UK
Retired March 2015
-
09-05-2008, 10:22 AM #4
Re: Furance problem
Thanks guys
-
09-05-2008, 04:57 PM #5
Re: Furance problem
Your problem is delayed ignition, this can be caused by a mutitude of things. the most commom in your case is since it fires the first time but delays after that is the carry over tracks that connect the burners to each other and to the pilot are worn and are not properly carrying the gas to the pilot to ignite. Since it ignites the first time but not after that they are expanding and thus becoming open to much and not properly carrying the gas to the pilot for ignition and it builds up in the burner compartment till it reaches the pilot and ignites. The bes cure for this problem is to replace the burner rods, at the least they should be cleaned and adjusted and realigned for proper carry over to each other and to the pilot. Also verify the manifold gas pressure, Maximum 3.5" natural, 10" Lpg then measure your temp rise and adjust your pressure down if your tem rise is to high or your blower down if it's to low.
Hope this helps...
**************Experience: Something aquired after you need it....************
-
10-05-2008, 03:48 PM #6
Re: Furance problem
Thank mate
Sounds right......I checked the pressure and its ok
Any way this machin is to old to start that kind of operation......I belive they will buy a new one
Thanks any way
Cheers
-
11-05-2008, 06:35 PM #7
Re: Furance problem
hi Did you check the pressure wile burnenr is on
usually the big wooof sound is a sign of unsuficient air-gas mixture
Best if don by experts for gas burners
-
13-05-2008, 01:39 PM #8
Re: Furance problem
Theres a cluey fridgey in australia that posts in the www.whirlpool.net.au forums, in the gadgets section, you might have to register to see that section. When you register and see the gadget lounge, scroll to the bottom and do a search for "air conditioning" or "gas heating"
He's been doing refrigeration for a long time, plus he uses gas heating (as it's so cheap here).
He posts under the name "youbloodlybeauty"
See if you can get his attention there, or look him up as I think he's from melbourne. Send him a PM.
Being in perth where the temps never go low enough to bother with gas or electrical heating (reverse cycle works fine), I've never seriously looked into gas heaters, or oil, or other furnaces as I can install a reverse cycle a/c pretty cheaply.
-
14-05-2008, 11:32 AM #9
Re: Furance problem
UPDATE:
First of all thanks for all the reply.....you are all great.
I am doing a 2 day course to get my gas ticket(dissconnect&reconnect)
I asked the teacer about this problem and he said simple as that:your problem is dirt.
Clean all the assy' and it will be ok.
What do you think?
I am talking about a very old brivis wombat 92
Similar Threads
-
A strange problem
By MuhengineeR in forum Air ConditioningReplies: 14Last Post: 27-10-2010, 05:21 PM -
York Chiller Excessive Purges Problem
By imranmd in forum CommercialReplies: 5Last Post: 07-03-2008, 05:13 AM -
Oil carry over Problem in Refrigeration Unit
By imranmd in forum IndustrialReplies: 1Last Post: 27-08-2007, 03:09 PM -
Hot start problem on VRV REYQ14M7W1B
By cool#9 in forum Air ConditioningReplies: 9Last Post: 20-04-2007, 08:09 PM -
LG 10.5 kw cassette timer problem
By Andy W in forum Air ConditioningReplies: 10Last Post: 25-06-2005, 07:09 PM