Oil Burner starts then shuts down

Oil Burner starts then shuts down

PostBy: Uglysquirrel On: Sat Dec 19, 2009 2:00 pm

My regular oil burner (hydronic baseboard) cycles on an off every ~10 minutes even after the upstairs has just been warmed up. The combustion fan starts, oil ignites and runs for 2-3 sec's then, pow, the unit shuts down. The baro shakes. Burner is a Reillo, control is a Honeywell with min, max, and diff settings that were not touched from last year.

When I push up the temp on the thermostat upstairs, the circulator kicks in, burner starts and runs happy for several minutes like it should, then shuts down when temp is reached , this suggests it's not a oil supply issue.

What do you think is up?
Uglysquirrel
 
Stove/Furnace Model: Pocono

Re: Oil Burner starts then shuts down

PostBy: WNY On: Sat Dec 19, 2009 2:05 pm

loose wire somewhere? maybe adjust your settings 1 or 2 degrees maybe a bad spot in the adjustments....
WNY
 
Hot Air Coal Stoker Stove: Keystoker 90K, Leisure Line Hyfire I
Coal Size/Type: Rice
Stove/Furnace Make: Keystoker, LL & CoalTrol
Stove/Furnace Model: 90K, Hyfire I, VF3000 Soon

Re: Oil Burner starts then shuts down

PostBy: Uglysquirrel On: Sat Dec 19, 2009 3:17 pm

I turned the differential knob a bit, See what happens.
Uglysquirrel
 
Stove/Furnace Model: Pocono


Re: Oil Burner starts then shuts down

PostBy: jim d On: Sat Dec 19, 2009 6:38 pm

sounds like the heat anticpater on the thermostat turn it up or set it to the amp draw of the controll the tt ties into if you've got zone valves turn it all the wayup longer run
Last edited by jim d on Sat Dec 19, 2009 7:04 pm, edited 1 time in total.
jim d
 
Stove/Furnace Make: alaska//coaljck
Stove/Furnace Model: liberty// cj3

Re: Oil Burner starts then shuts down

PostBy: coaledsweat On: Sat Dec 19, 2009 6:52 pm

The eye on the gun isn't always seeing the flame and shuts it down (it is there to prove the flame, shutdown prevents it from filling the combustion chamber with oil if it keeps running). Most have trap door on top of the burner, it may be what the ignition transformer is mounted on. Open the door and you will see a small cell with a few wires aimed at the burner's tip, clean it carefully with a soft, moist cloth and then re fire the burner.
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Re: Oil Burner starts then shuts down

PostBy: gerard On: Sat Dec 19, 2009 7:31 pm

eye is a good start, also if you can get to the injector nozzle, make sure there's no carbon build up on the end. Same thing happened to me and the service guy had to clean off the injector nozzle because the carbon buildup wasn't allowing proper atomization of the fuel, hence an improper flame was "sensed" and the unit would shut down.
gerard
 
Stove/Furnace Make: yukon dual fuel
Stove/Furnace Model: husky

Re: Oil Burner starts then shuts down

PostBy: coaledsweat On: Sat Dec 19, 2009 8:05 pm

gerard wrote:the service guy had to clean off the injector nozzle because the carbon buildup wasn't allowing proper atomization of the fuel, hence an improper flame was "sensed" and the unit would shut down.

Good point. The eye is a safety device and extremely sensitive to what it wants to see. To work properly the unit should be cleaned and serviced regularly and the burner nozzle replaced. A bad nozzle will eat a lot more fuel and they all go bad a little too quickly.
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Re: Oil Burner starts then shuts down

PostBy: 009to090 On: Sat Dec 19, 2009 8:59 pm

getting fuel oil to the nozzle? The tank isn't empty is it? Clean fuel filter?


Never mind, I just saw your line where its not an oil supply issue. :oops:
009to090
 
Stoker Coal Boiler: EFM 520 HighBoy
Hot Air Coal Stoker Stove: DVC-500 x 2
Coal Size/Type: Anthracite Rice

Re: Oil Burner starts then shuts down

PostBy: SMITTY On: Sun Dec 20, 2009 12:49 pm

Usually if the eye doesn't see the flame, it will shutdown & lockout until you manually reset it.

Could just be short cycling, due to your house being warm from the coal .... which then makes the oil unit waaaay oversized for the house.

You could lower your high limit to stop the burner from running.
SMITTY
 
Stoker Coal Boiler: Patriot Coal - custom built by Jim Dorsey
Hand Fed Coal Stove: Harman Mark III (not currently in use)
Coal Size/Type: Rice / Blaschak anthracite
Other Heating: Oil fired Burnham boiler

Re: Oil Burner starts then shuts down

PostBy: CoalBin On: Sun Dec 20, 2009 8:26 pm

bad flowcheck ?
grab each loop pipe - all should be cold when no call for heat
CoalBin
 
Stove/Furnace Make: Harman
Stove/Furnace Model: DVC-500

Re: Oil Burner starts then shuts down

PostBy: franco b On: Mon Dec 28, 2009 7:26 pm

jim d wrote:sounds like the heat anticpater on the thermostat turn it up or set it to the amp draw of the controll the tt ties into if you've got zone valves turn it all the wayup longer run


Agree
franco b
 
Hand Fed Coal Stove: V ermont Castings 2310, Franco Belge 262
Baseburners & Antiques: Glenwood Modern Oak 114
Coal Size/Type: nut and pea

Re: Oil Burner starts then shuts down

PostBy: joe the burner guy On: Sat Jan 02, 2010 11:28 pm

if it were a issue with flame detection, the riello will lockout after trial when called to fire. it will retry once or twice if the flame drops out after it passes the trial period, so the issue is in the controls. like jim d and franco b write, likely the anticipator of a mechanical t-stat is set too low causing a zone valve to short-cycle - common problem with t-87 running taco zone valves. Also a problem with the new electronic 2-wire replacement for the t-87 which "robs" power from the t-t circuit, again plays hell with tacos. Airbound loops can do this since the boiler will bounce off high limit, but no heat will circulate. sorry for the extra noise... hope it helps.
joe the burner guy
 
Stove/Furnace Make: jotul
Stove/Furnace Model: nr507b

Re: Oil Burner starts then shuts down

PostBy: joe the burner guy On: Sat Jan 02, 2010 11:32 pm

one more idea - taco heads sometimes rock out of position causing a call to the boiler that acts like you describe. twist all of the heads clockwise to make sure they are properly seated...
joe the burner guy
 
Stove/Furnace Make: jotul
Stove/Furnace Model: nr507b