© Edwards Limited 2014. All rights reserved. Page 5
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Introduction
A546–00–880 Issue E
1.5 Active utility control
Active Utility Control (AUC) is available on the iGX system. This function reduces the power of the iGX system while
on stand-by. The power reduction is achieved by reducing the rotational speed of the iGX pump. This function also
reduces the nitrogen purge of M variant systems while in stand-by mode.
Advanced Active Utility Control (AAUC) is also available. This function, in addition to AUC, can reduce the water flow
of the iGX system while on stand-by, therefore allowing further reductions in power. Contact Edwards for advice.
The AUC functionality is controlled by the on/off process signal from the Tool Interface Module (TIM).
Figure 5 - Priority of control
1. PDT 1
2. PDT 2
3. System controller
4. Tool
5. Front panel
6. None in control
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