Plumbing access ports
Make plumbing connections through the plumbing access ports. Refer to Figure 3, Figure 4 or
Figure 5. To keep the enclosure rating, make sure that plugs are installed in the plumbing ports that
are not used.
If using an external air purge, refer to the instructions supplied with the air purge kit to remove the fan
filter and replace it with a plug. Refer to the operations manual for instructions on enabling the air
purge. Refer to the maintenance and troubleshooting manual for the part number for the air purge kit.
Figure 3 Ports for one or two sample streams
1 Drain vent-keep open 4 Air purge inlet (optional) 7 Case drain for spills or leaks
2 Not used 5 Sample 1 bypass drain 8 Sample 1 inlet
3 Two sample stream analyzers
only: Sample 2 bypass drain
6 Chemical drain 9 Two sample stream analyzers
only: Sample 2 inlet
Figure 4 Ports for four sample streams
1 Not used 5 Sample 2 bypass drain 9 Sample 1 inlet
2 Sample 4 bypass drain 6 Sample 1 bypass drain 10 Sample 2 inlet
3 Sample 3 bypass drain 7 Chemical drain 11 Sample 3 inlet
4 Air purge inlet (optional) 8 Case drain for spills or leaks 12 Sample 4 inlet
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