Revision 4
30
April 2020
Figure 10: Location of Instrument Air Regulator
Do not adjust the instrument air pressure with this regulator until all internal tubing has been
installed in the oven enclosure as shown in Figure 8. Once all the tubing is installed, the
instrument air pressure indicated on the gauge can be adjusted to a suitable value (typically
30-50 psig).
The control cabinet is purged for two reasons: for hazardous area classification and to
maintain a positive pressure inside the control cabinet to minimize the exposure of electrical
equipment to the corrosive atmosphere commonly found in sulfur recovery units. The cabinet
purge should be initiated as soon as practical after the analyzer system is installed until the
analyzer is commissioned.
The control cabinet
purge and pressurization is controlled by the purge/pressurization
system
Electronic Power Control Unit (EPCU)
or purge control box, as shown in Figure
11.
Figure 11: Control Cabinet Purge Control Box
Содержание 943-TGX-CE
Страница 132: ...Revision 4 132 April 2020 Figure 81 Oven Cabinet Door Removed ...
Страница 133: ...Revision 4 133 April 2020 Figure 82 Control Cabinet Door Removed ...
Страница 134: ...Revision 4 134 April 2020 Figure 83 Power Steam Air Signals Connection Details ...
Страница 135: ...Revision 4 135 April 2020 Figure 84 AC Wiring Schematic ...
Страница 136: ...Revision 4 136 April 2020 Figure 85 DC Signals and Wiring Diagram ...
Страница 137: ...Revision 4 137 April 2020 Figure 86 Flow Diagram ...