FMS Commissioning
Tips & Tricks
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Approaching control
During operation the compound approaches the control elements from one
elements from one side
side in order to compensate for the mechanical hysteresis of the valves,
approaching all set-points from above.
Exception:
The top point is never overrun and therefore approached
from below.
When setting, care should be taken to approach the valves in the same way.
As a result the system values in automatic mode are reproduced in exactly
the same way.
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Entering settings
Selector switch (2) to "Setting”
Run to desired set-point from above
if accidentally running below this point
Run above set-point and re-approach from above
Entering top setting
Selector switch (2) to "Setting”
Run to desired set-point from below
if accidentally running above this point
Run below set-point and re-approach from below
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Only in this way will you reach the same valve position and hence also the
same combustion values in setting as later during automatic operation.
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Ignition delay when setting
When the ignition point is entered for the first time the facility exists for
observing the ignition process by entering a delay time. To do this, the time
needed to run to the burner sight glass and to the boiler end respectively must
be set in parameter 759.
As soon as the question "Really ignite?” is confirmed by pressing the
acceptance key, this time expires. On expiry the ignition is released.
This time operates only if the FMS is on "Setting”.
Pre-setting load automatically
Parameter 4 can be used not only to select the separate ignition point but
also to determine whether the load default is to be automatically pre-set
during setting. If this is the case the load points (in addition to the ignition
point) are fixed at the values 200 (corresponding to 4 mA at the load input),
250, 300, 400, 500, 600, 700, 800, 900 and 999.
It is then possible to switch only between these points by means of the load
rating switch position. You cannot run to intermediate values during setting.
Storing a point causes the load default to skip to the next value (unless this is
already taken up). In this way a curve can be entered without shifting to load
rating.
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