Lamtec VMS Series, Manual

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10 Appendix
NOTICE
Motors with LAMTEC pre-calibration are adjusted at LAMTEC in that way that 0 - 90°degree
has the same potentiometer value at every motor. Therefore a change of such motors is pos-
sible without adapting the curves in the VMS to the new motor.
WARNING!
It is not allowed to change any adjustment in a pre-calibrated motor (e.g. potentiometer or
switches). Otherwise the pre-calibrated characteristic will be lost. The burner has to be re-ad-
justed then.
10.4.2 How to Replace a Complete Control Drive
If you replace a motor without pre-calibration it is necessary to check the burner adjustment
after the change, because the potentiometer value and the position of the switches may differ
a little bit. This may lead to an other position of the damper.
WARNING!
Therefore you must prove the burner adjustment again in all firing rate positions and all oper-
ation modes. If necessary adapt the curves in the VMS.
10.4.3 How to Replace a Potentiometer
WARNING!
Keep switches in the same position.
1 Note actual feedback value at lowest position before changing the potentiometer.
2 Remove old potentiometer.
3 Insert new potentiometer and adjust it so that actual value feedback at lowest position is
the same like noted before.
4 Fix potentiometer in according to the instruction of the motor manufacturer.
5 Verify burner adjustments and change if necessary
WARNING!
Since the normally used potentiometers can have different values, it is possible that the damp-
er has another position than before. Therefore you must prove the burner adjustment n again
after a potentiometer change, at all firing rate points and in all operation modes.
10.5 Schalter und Tastenkombination der Bedieneinheit
10.5.1 Front Panel VMS/FMS