7
Operation
Fuel-air Compound Control
Fuel-air compound control
This compound pneumatic control
system with precision-adjustment capa-
bility has been designed to allow the
fuel and air flow rates to be steadily
varied in sliding mode for an adjustment
of the fuel-air ratio over the whole con-
trol range.
In the stepless control mode the load
will be controlled at any point within the
control range depending on the heat
demand.
Electronic compound control:
The air box includes an actuator for
operating the air damper. The oil control
valve incorporates an actuator for adju-
sting the return oil flow rate and thus the
output of the burner.
The actuators for the air and fuel flow
control will be operated depending on
output by the electronic compound con-
trol which will move them into the pro-
grammed positions.
4
Luft
M
M
Öl
Öl
RL
VL
1a
1b
M
3
2
Oil
feed
Oil
return
Air
Electronic compound control
1a
Oil control valve with actuator
1b
Air dampers with actuators
2
Burner
3
Boiler
4
Combustion air fan
