oil burner ?

joe_37

I have a becket af model burner. I have everything adjusted to the factory specs. the problem is that i can't get the oil presure to come down. I have a new ashcroft 200 lb gauge on there and everytime the burner starts it pegs the needle over 200 psi I have tryed adjusting the screw for the oil presure but can not get it up or down. I am fireing a 1 gal 80a nozzel I have look up the presure and becket sugjest 140 psi. Do I have a problem with the pump or is it the burner. I know this site deals more with the wet side of the heating system but figure there must be someone out there that deals with buners.

thanks for any help,
joe

Alan R. Mercurio_3

Joe, If you're sure you're trying to adjust the pump using the correct adjustment screw and I'm sure you are. If you're not getting any change in the pump pressure and it's as high as it is. I would replace the fuel pump.

Best of luck to you my friend.

Your friend in the industry,
Alan R. Mercurio

Oil Tech Talk

Firedragon_4

You may have that gauge in the wrong place like the

cone valve opening. If you're not 100% sure of what you are doing, you shouldn't be doing it.

Weezbo

good afternoon....

many pumps lose some pressure ...gaining pressure now thats a whole nother Ballpark sort to speak...dont take this personnaly..and i am not really Sure it could happen...however i give it a go...is there Any Way that your burner has 240V running to it? it might not immediately fry the controller...however it may work because of something called backelectromotive force in the drive.oh and if so work like a "wonder pump"....thats sorta wild speculation on my part however i am not there and certain variables are not readily apparent in my picture of what you are experiencing. if not,electrical in naturethen the next rational thoght is Is there a Pump supplying the oil To the appliance? ok now thats what these osv balves are for...just specing on this once again...the pump could be suspect if neither of the two questions seem applicable to your situation...i have honestly Never Seen nor known of a pump delivered on a home owner (240K BTU) boiler that was set at two hundred psi. try this. take the primary off after shutting down the power,test the voltage there..if it is say 131 or some exotic number..call the electrical company it is a few pegs on thier transformer.if it seems normal ok..turn the power off again look at the motor speed and the pump speed,it maybe possible that some how you have the wrong pump on the motor...if not take the nozzel off and replace it with a pressure gauge...turn the gun up...so you can read whats hitting the nozzel.connect the MOTOR wires to the black and white comming in. this will cause only the pump to run driven by its drive motor.soon as it bangsthe pressure up take a flat head and stick it into the pump adjustment slot and dial it all the way to the right...then,turn it down to the left to say within two degrees of where you wnt it to be and then fine dial it back Up to the right. if it dont "happen"...dial it down to 98 lbs then do the sme procedure again. if that dont make it happen take the pump off and take it back..its fornicated.

Weezbo

Alan you and firedragon Type fastern me:)

Bill Nye

It could happen

if the pump saw any water in the fuel. The pressure regulator is nothing more than a ball and spring with an adjustment screw. It could be rusted shut. I've seen it done before.

Oh yeah, and if the bypass plug is installed in the pump and there is no return pipe or it is plugged the pressure will do crazy things.

Weezbo

say Bill..

wouldnt a guy know he installed a by pass plug for a two pipe system? he would not likely receive the bypass installed....i havent much cared to use a new burner that didnt need a by pass in close to two decades now...i admitt that it might be possible to receive a burner previously installed ....we are looking into the crystal cool pool of water and the source of the ripples is indeed worthy of all educated guesses maybe one of us will suggest something that is the cause and the lad will be on with life:)who knows maybe you right...

Weezbo

Alan,...With what?

soot_seeker_3

which pump is this & where are you placing the gauge?

an AF can have different pumps on it. some of the older pumps only allow this measurement on the 1/8" tube going to the nozzle. others allow the use of one of the other ports. generally if you use a port for a pressure measurement that not meant for this you will get a very high reading. you must take the exact model number off the pump & look it up on the sundstrand, suntec, or whatever site & check the app - service notes to be absolutely sure. also, try to use a 280-300psi gauge (preferably liquid filled) to accurately measure a 140-150psi pressure since mid-scale is most accurate.

Guy_5

pump

Is it a 1725 rpm pump on a 3450RPM motor? If it is a Suntec pump, it should be an A2***. If it's an A1, it is a 1725 RPM pump.

Firedragon_4

Good grief Weezbo,

have you lost it or what????
Digging up 5 month old postings, DUH, HELLO!
They've probably fixed it by now, DOUBLE DUH!

jim_49

Duh, 200 psi on a af burner with an A pump and 2 pipe system means that your return line is partially or all PLUGGED . BLOW THE LINES OUT.