10
Thermostat 1 (top thermostat) controls switching on and off the burner automatic system. It
must set on 0 if diesel or kerosene are used and in case of other fuel types it must be set on the
temperature indicated in the chart below:
Fuel type
Thermostat 1
temperature,
о
С
Thermostat 2
temperature,
о
С
Diesel
0
0
Kerosene
0
0
Waste motor oil
70
75-80
Waste transmission oil
75
80-85
Vegetable oil
100
105-110
After the burner is turned on, both heaters get switched on and fuel heating begins. As soon as
the fuel is heated up to the temperature set on the thermostat 1, the burner control chamber
starts working and the ignition begins, then the heater 1 switches off. The heater 2 is on to keep
the fuel temperature up to its working value.
NB!
Fuel characteristics may differ a lot. Generally, starting the burner first time set
thermostat 2 on its maximum temperature at which fuel doesn’t start boiling yet. Set
thermostat 1 5-10 grades lower than thermostat 2
9. Photocell, fault indicator and controller
Photocell
is a flame-monitoring device. If the burner hasn’t started up or the flame has gone out
suddenly, the photocell sends a signal for emergency shutdown of the burner. In 10 seconds
after the photocell discovers flame absence, the burner will be shut down and the emergency
indicator will be switched on the control chamber.
NB!
If the photocell is exposed to intense room light that gets inside the burner
through the view hole, the burner may stop working correctly. Keep the view hole
away from intense light source.
Emergency shutdown indicator
is placed on the control chamber surface and it looks like a
rubber red button. In case of emergency the control chamber switches off the burner and the
emergency light turns on inside the indicator.
NB!
In case of emergency shutdown the burner’s work can be resumed only after a
complete fix of the emergency situation. Then the burner can be manually restarted.
To restart the burner manually press the emergency indicator button until it clicks. The indicator
will switch off and the burner will start up again. If necessary an emergency signal (lamp or ring)
can be connected to inlet T1 as it is shown on the diagram of burner electrical wiring (see
below).
NB!
To prevent premature manual restart the control chamber has a restart delay for
3 minutes after emergency shutdown.
Control chamber
Siemens LOA24.171B27 is placed on the right above the burner electric
engine. It controls safety and consistency of the burner work in automatic mode. The control
chamber has the following work periods:
Emergency shutdown delay,
sec.
Blow-off, sec.
Ignition, sec.
Period before flame
control start, sec.
10
13
15
15
