Hach 5500sc SiO2 Installation page 7

Plumbing access ports
Make plumbing connections through the plumbing access ports. Refer to
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
2 Not used
3 Two sample stream analyzers
only: Sample 2 bypass drain
Figure 4 Ports for four sample streams
1 Not used
2 Sample 4 bypass drain
3 Sample 3 bypass drain
4 Air purge inlet (optional)
4 Air purge inlet (optional)
5 Sample 1 bypass drain
6 Chemical drain
5 Sample 2 bypass drain
6 Sample 1 bypass drain
7 Chemical drain
8 Case drain for spills or leaks
Figure 3, Figure 4
7 Case drain for spills or leaks
8 Sample 1 inlet
9 Two sample stream analyzers
only: Sample 2 inlet
9 Sample 1 inlet
10 Sample 2 inlet
11 Sample 3 inlet
12 Sample 4 inlet
or
English 7