Operation Manual

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Siemens Schweiz AG User Manual CE1U2354en
HVAC Products Configuration 23. August 2007
Burner control
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3-position control and modulating UX
The actuator is controlled in PID mode. By setting the proportional band (Xp), the
integral action time (Tn) and the derivative action time (Tv), the controller can be
matched to the type of plant (controlled system). Also, the actuator running time is to be
set.
•
Neutral zone
For control operation, a neutral zone is used which is at +/- 1K about the current boiler
temperature setpoint. If the boiler temperature stays in the neutral zone for more than
16 seconds, the neutral zone becomes active and positioning pulses are no longer
delivered. As soon as the boiler temperature leaves the neutral zone again, control is
resumed. If the boiler temperature does not stay long enough in the neutral zone,
positioning pulses will also be delivered within the neutral zone.
3-position connections:
Use Space Connector type
L1 Phase burner P AGP8S.07A/109
Protective earth
N Neutral conductor
T1 Phase release modulating burner
T2 Release modulating burner
S3 Input burner fault
4 Input burner hours run
QX1 Air damper modulating burner closing U AGP8S.03C/109
FX4
(T6)
Phase air damper modulating burner
opening
Z AGP8S.04C/109
QX4
(T8)
Air damper modulating burner opening
Connections modulating UX:
Use Space Connector type
L1 Phase burner P AGP8S.07A/109
Protective earth
N Neutral conductor
T1 Phase release modulating burner
T2 Release modulating burner
S3 Input burner fault
4 Input burner hours run
UX DC 0…10 V modulation output n AGP4S.02F/109
M Ground
The boiler is released as soon as a valid boiler temperature setpoint is active.
Connections:
Use Space Connector type
L1 Phase burner P AGP8S.07A/109
Protective earth
N Neutral conductor
T1 Phase boiler release
T2 boiler release
S3 Input burner fault
4 Input 1st burner stage hours run
Without boiler sensor