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Oil Burner Cheat Sheet (DRAFT) by

A reference sheet for Oil Burner Adjustment / Diagnosis

This is a draft cheat sheet. It is a work in progress and is not finished yet.

Oil Nozzle Pressures

Nozzle Spray Pattern

Nozzle Selection

Always check boiler manufa­cturer for nozzle size and setting first based on boiler requir­ements and BTU needs
Rule of thumb (NOT ALWAYS) If gun has a retention head use a 60 Degree or less
 

CAD Cell Diagnosis

Testing Ohms for CAD Cell
Good CAD Cell
Dark/No Light 20K+ Ohms
 
Light/Fire On Low Numbers 400-800 Ohms
Bad CAD Cell
Light/Fire is on Ohms reading in the thousands or 0
Pump Solenoid Test
Cleancut should be 400-500 ohms, Suntec 494-526 ohms and Riello 1215-1485 between terminals 1&2. Outside these parame­ters, you have a bad coil.

Testing Oil Pump/S­upply Line

Put on Pressure Gauge on Pump Outlet
Run pump for a few seconds then shut down.
Once shut down pressure will drop 20%, if pump does NOT hold at this pressure and continues to fall = Bad Pump
Vacuum Test- micro bubbles start @ 6" of vacuum issues at 8"-1­0"
Place Vacuum Gauge INLINE on inlet of pump, DONT run pump dry
Start burner and OPEN bleede­r....Close bleeder @ 15" vacuum and shut off burner
Pump should hold vacuum for 5 minutes, if 15" CANNOT be achieved or CANNOT HOLD for 5 minutes, CHANGE PUMP
To test SUPPLY LINE for leaks.. Shut OFF TANK supply and install Vacuum Gauge Inline
Start Burner then Close Valve BETWEEN Pump and Vacuum Gauge @ 10-15" and shut down burner
Vacuum should hold for 10 minutes
 

Combustion Testing

 

Primary Controls

Interm­ittent- Spark is contsantly ON
Stack Switch (Thermo Primary) Most Common Honeywell RA117A
Interr­upted- Spark shuts off after ignition of flame
Power (HOT) Line 1, Neutral to Line 2, Motor & Oil Solenoid to "­Mot­or" (Line 3), If its has Interr­upted Control wire to "­ING­" (Line 4), For Interm­ittent Control Connect to "­Mot­or" (Line 3)
Interm­ittent CANNOT be used for Interr­upted Controls, But you adapt a Interr­upted Control for a Interm­ittent Control
Two Wire Thermo­stats Connect "­W" & "­B"--­Three Wire RED to "­R" WHITE to "­W" BLACK to "­B"