Output regulator (optional)
Method of operation
Procedure description
The burner's startup proceeds exactly as already described, except that an
enabling command to start the burner must have been provided by the
output regulator. In other words, the actual value must be smaller than the
set-point by an appropriate amount.
The output regulator only operates once the burner has fired up and the
signal "Enable regulation” (terminal 4) has been given. Load specification
for the compound is then provided via the integral output regulator.
It depends on the difference between the actual value and the set-point,
and on the control parameters set.
If the actual value exceeds the maximum value set, the output regulator
shuts down the burner.
The load regulator is only active in "Automatic” mode.
Weather control
If the output regulator is configured as "weather controlled”, the set-point
can be shifted between the parameters SetpointMin and SetpointMax by
altering the value at the redundant feedback channel 1.
When the regulator is weather-controlled, the outside temperature is taken
into account when calculating the set-point. The operator can input a
minimum and a maximum set-point, between which the outside
temperature can determine the set-point (see diagram).
With the weather-controlled option activated, an external set-point
specification can also be implemented.
Pre-run temperature
Outside temperature
O
120 C
O
-20 C
O
70 C
O
20 C
O
5 C
O
30 C
Set-point max
Set-point min
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