Hach LXV526.98.2112A Installation Seite 31

3.6.7 Remove the plug from the air purge fitting
Note: Only do this task if the analyzer has an enclosure and does not have the optional cationic pump. Refer to
Figure 2 on page 9 to identify the cationic pump.
1. Remove the plug from the air purge fitting. Refer to
2. To keep the NEMA rating of the enclosure, do the steps that follow:
a. Connect a 0.3 m (1 ft) length of the supplied 6-mm tubing to the DIPA exhaust vent. Refer to
Figure 16 on page 30 to identify the DIPA exhaust vent.
b. Connect a 0.3 m (1 ft) length of the supplied 6-mm tubing to the air purge fitting.
3.6.8 Plumb the DIPA exhaust
Gas inhalation hazard. Plumb the DIPA exhaust vent to outside air or a fume hood to prevent
exposure to toxic gas.
Note: Only do this task if the analyzer has the optional cationic pump. Refer to
cationic pump.
For analyzers with an enclosure, use the supplied 6-mm OD tubing to connect the DIPA exhaust
vent to outside air or a fume hood. Refer to
For analyzers without an enclosure, use the supplied 6-mm OD tubing to connect the DIPA exhaust
port to outside air or a fume hood. Refer to
Figure 18 DIPA exhaust port—analyzer without enclosure
3.6.9 Connect the air purge (optional)
Note: Only do this optional task if the analyzer has an enclosure.
To keep dust and corrosion out of the instrument enclosure, supply clean, dry instrument-quality air
3
at 0.425 m /hour (15 scfh) to the air purge fitting with 6-mm OD plastic tubing. Refer to
Figure 19
W A R N I N G
Figure 16 on page 30 to identify the DIPA exhaust vent.
Figure 18.
on page 32.
Figure 2 on page 9 to identify the
Figure 19.
English 31