ohms /going off on safty

lee_7

My old employer used to clean the blast tube and paint them with a high temperature silver paint to help cad cell readings. Works great.

burnerman_2

ohms/going off on safty

ok heres the deal boiler 7 years old beckett burner with a carlin relay ok for some time it has been going on safty but because of the control it has a 65 sec and it tries to restart well i check the ohms off the wall replace eye nothing replace complete eye and socket nothing no i am gettin discusted then i noticed the blast tube was rusty brown from mositure so i clean it best i can the black is gone no shine i relocate the eye to the drawer assemly presto 875 ohms so does the eye see a flame or a reflection of a flame and has anyone else had this happen ?? royboy

tommyoil

NEVER!!!

The cad cell should ALWAYS be reading direct light and NEVER reflected light.

Paul Fredricks_3

Years ago with the old burners that worked fine. The problem with doing that with the new burners is that it can mask combustion problems. Cad cells in todays burners should be able to see enough light as designed.

Norm Harvey

There are holes in the drawer assemblys air plate that are right in front of the cad cell eye. They can clog up with lint and dust. Ive found that problem a number of times.