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SETTING OF THE AIR DAMPER SERVOMOTOR
PAUSE
FIRST STAGE
SECOND STAGE
2049
ST0 LEVER
The ST0 lever is factory set to allow the air damper to fully close on
shutdown.
Do not modify this setting for any reason.
ST1 LEVER
The ST1 lever controls the air for the 1
minimal output and must be set during commissioning.
The lever N5 controls the opening of the 1
therefore, be set to operate a few degrees in advance of ST1.
Example: if ST1 is setted at 20° then N5 must be at 15°.
ST2 LEVER
The ST2 lever controls the air for the 2
tory set to give more air than ST1 but must be set during commission-
ing.
Lever N3 controls the opening of the 2
therefore, be set a few degrees in advance of ST2.
Example: if ST2 is setted at 30° then N3 must be at 25°.
D5112
REMARK
The servomotor is equipped with two micrometric screws for a careful
setting of ST1 and ST2 cams (see figure).
st
stage flame. It is factory set for
nd
stage flame. It has been fac-
nd
Micrometric screws
8
GB
st
stage gas valve and must,
stage gas valve and must,
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