Revision 4
36
April 2020
5. Press the Esc
key twice to return to the EPCU’s default display.
3.3.2 Disable System Bypass
– Area Hazardous (Explosive)
If the installation environment should suddenly become hazardous while maintenance work
is ongoing, the analyzer power must be immediately switched off with the disconnect device
mentioned in Section 2.4.3 OR the System Bypass immediately disabled.
1. Using the arrow keys, select BYPASS ON and press START/SET.
2. Using the arrow keys, select OFF and press START/SET. SETTING CORRECT? will
be displayed.
3. Select Y and press START/SET. The SYSTEM BYPASS indicated on the EPCU
display will turn off, and the SYSTEM BYPASS indicator will stop flashing yellow. The
EPCU is now once again in full-auto mode.
4. Press the Esc
key twice to return to the EPCU’s default display.
Disabling the System Bypass in this fashion will cause an automatic shut-down, as safe
pressure will not be present in the control cabinet when the System Bypass is disabled.
3.4 Flow Control Settings
The flow control settings govern system operation. Once the system has been commissioned
and the flow rates have been set, only occasional adjustments should be required. Flow settings
will be checked and verified when doing the recommended routine preventative maintenance
procedure given in Section 6.2.
3.4.1 Cabinet Cooler Air Valve
A vortex cooler is mounted on the top of the analyzer control cabinet to maintain the control
cabinet interior temperature at or below a given setpoint. The location of the vortex cooler
and the
Cabinet Cooler Air Valve
is shown in Figure 14.
Figure 14: Location of Vortex Cooler and Cooler Air Valve
Vortex Cooler
Cabinet Cooler Air Valve
Summary of Contents for 943-TGX-CE
Page 132: ...Revision 4 132 April 2020 Figure 81 Oven Cabinet Door Removed ...
Page 133: ...Revision 4 133 April 2020 Figure 82 Control Cabinet Door Removed ...
Page 134: ...Revision 4 134 April 2020 Figure 83 Power Steam Air Signals Connection Details ...
Page 135: ...Revision 4 135 April 2020 Figure 84 AC Wiring Schematic ...
Page 136: ...Revision 4 136 April 2020 Figure 85 DC Signals and Wiring Diagram ...
Page 137: ...Revision 4 137 April 2020 Figure 86 Flow Diagram ...