58
Bentone
10.5.3 Adjustment of output
When the output increases, the system moves from the curvepoint of stage
1 (P1) to the switch-on point of stage 2 (P2on). If the switch-on point is
exceeded, the valve for the second stage is switched on. Then, the system
moves to the curvepoint for stage 2 (P2). When the output decreases, the
system moves from the curvepoint of stage 2 (P2) to the switch-off point
of stage 2 (P2of). If this point is crossed, the valve for the second stage is
switched off. Then, the system moves to the curvepoint for stage 1 (P1).
In 3-stage operation, the output between stage 2 and stage 3 is adjusted
analogously to 2-stage operation. As static outputs, only P1, P2 and P3 can
be approached.
The switch-on and switch-off points are crossed only when changing
between stages. The traveling speeds are fixed. Depending on the
positioning angles to be covered, air actuator and VSD do not reach the
operating or switch-on/switch-off points at the same time. The valves
are switched on/off only after both actuators have reached their correct
positions.
When parameterizing the curves, the switch-on points can also be
approached in a stationary manner. In addition, when setting the curve via
P2_d (P3_d), curvepoint P2 (P3) can be readjusted without traveling to it. In
that case, the system is at the respective switch-on point. This procedure is
used to reduce the operating time if there is shortage of air.
10.5.4 Entering the operating position
The burner is ignited at ignition position P0. When entering operating phase
60, the actuators are driven from ignition position P0 to the operating point of
stage 1 (P1) at the respective traveling speed.
10.5.5 Operating position
In the operating position, the burner’s output can be adjusted between
operating points P1 and P2 or P3 in accordance with the load controller’s
presetting, as described in chapter Adjustment of output. Ignition position P0
is not approached anymore. It can only be reached via curve adjustment.
Summary of Contents for B 45i A2.2H J/K
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