Revision 5
30
August 2021
Figure 11: 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 flow control valve
is located inside the
purge control box
mounted on top of the analyzer, shown in Figure 12.
Figure 12: Control Cabinet Purge Control Box
To open the purge control box, use the supplied purge system access key. As soon as
instrument air is available, initiate a small purge air flow rate through the control cabinet.
Normal purge flow rates cannot be adjusted until all conduit connections are sealed, and the
Содержание 943-TGXeNA
Страница 130: ...Revision 5 130 August 2021 Figure 82 Oven Cabinet Door Removed ...
Страница 131: ...Revision 5 131 August 2021 Figure 83 Control Cabinet Door Removed ...
Страница 132: ...Revision 5 132 August 2021 Figure 84 Power Steam Air Signals Connection Details ...
Страница 133: ...Revision 5 133 August 2021 Figure 85 AC Wiring Schematic ...
Страница 134: ...Revision 5 134 August 2021 Figure 86 DC Signals and Wiring Diagram ...
Страница 135: ...Revision 5 135 August 2021 Figure 87 Flow Diagram ...