141
10 Appendix
Other motors are allowable only if the potentiometer connection forms a positive interlock.
10.22 Changing Control Drives / Potentiometers
10.22.1 How to Replace a Servo Motor
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 ETAMATIC OEM.
10.22.2 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.
10.23 Replace an ETAMATIC OEM
WARNING!
For replacing a burner control unit you have to take special measures. If you ignore this in-
structions it may cause in dangerous situation or malfunction.
How to upload the data in the new device:
Regeltechnik
Kornwestheim
GmbH
ST 5102, ST5113 Contelec
* also available at LAMTEC
Manufacturer Description Potentiometer
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