BURNER OPERATION
Before start-up
Check that the correct nozzle is fitted. Reference should be made to the
instructions of the appliance manufacturers.
If the burner is firing Kerosene the nozzle must be sized for a maximum pump
pressure of 10 bar (145 psi). If Gas Oil is being used then a smaller nozzle must
be selected to allow a pump pressure of approx 14 bar (200 psi). This is
necessary to give better fuel atomisation and therefore better combustion.
Fit a pressure gauge to the oil pump (as shown in the diagram below).
Start-up procedure
Close the main switch and the thermostats
to allow the burner to start up.
The burner motor and ignition transformer
are both powered during the pre-purge
period.
During pre-purge the oil pressure can be
set, as the pressure will register before the
solenoid valve is opened (see diagram).
If necessary the oil supply can be de-
aerated from the pump through the
pressure gauge manifold.
During this pre-purge period checks are
made for ‘stray-light’ onto the photocell
and the integrity of the solenoid coil of the
pump. If ‘stray-light’ is detected, or if the
coil is faulty, then the coil will not receive full
voltage and therefore will not release any
fuel.
If checks are ok then power is fed to the solenoid coil and the valve will open.
Fuel is then released to the nozzle.
The spark will ignite the fuel spray.
If a flame is formed this will be detected by the photocell and the control box
will turn off the ignition and assume normal run mode.
If a flame is not formed, or detected, then the control box will go to a lockout
condition and the indicator lamp on the control box will be illuminated. The
control box will need to be reset to enable the burner to re-attempt a start
up.
Pressure Gauge
Pressure
Regulator
E90-803-001-001-00 - 02/06
7
To Next Page
Loading...