
Figure 11
Priming and adjustment of the pump (Fig.10).
1. Inlet
2. Return
3. Bleed and pressure gauge port
4. Vacuum gauge port
5. Pressure adjustment
6. Nozzle outlet
Trouble shooting checklist
Symptoms
Fault check
Burner will not start
Mains switch not on.
Ensure burner lockout has been reset.
Blown fuse.
Timer/thermostats not made.
Fault in control box or fan motor.
Burner pre-purges and stops
Fault in control box
Photo cell. Seeing the light or faulty.
Burner does not spark during cycle and
Transformer.
stops
Fault in control box.
Burner does not ignite
Dirty ignition electrodes or incorrect setting.
Fault ignition transformer.
Blocked nozzle.
oil solenoid failure.
Oil pressure too low/Check oil supply.
Blocked oil filter.
Excessive combustion air for nozzle
capacity/check air setting
Fault in control box.
Burner ignites and then stops
Faulty nozzle.
Photo-resistor does not ‘see’ flame.
Excessive combustion air for nozzle capacity.
Fault in control box.
Oil pressure too low.
Blocked oil filter.
10