Installation | 3-17
Weatherproof Wall/Z-Purge Option
Figure 3-19 shows the wall and pole mounting dimensions for the Series
2000 weatherproof Z-purge enclosure. To mount this control unit version,
you must also connect instrument air to the Purge Inlet and set the pres-
sure and flow as indicated on the warning tag on the control unit.
Don’t open the Z-purge enclosure until you verify that the area has
been classified as nonhazardous.
Z-purge shutdown procedure
Remove power from the control unit for one hour while maintaining
purge air flow before door is opened, unless the area is demonstrated to
be nonhazardous.
Z-purge start-up procedure
Do not restore power after the enclosure has been opened until the enclo-
sure has been purged for 1 hour at a pressure of 0.4” of water.
Pressure
Gauge
1/2” Conduit
Entry (2.22 cm)
Two 3/4” Conduit
Entries (2.70 cm)
Purge Air Inlet
1/8” Compression Fitting
Metering Valve
Exhaust
Restriction
7.50
19.05
5.31
13.49
12.00
30.48
Flange
8.00
20.32
5.88
14.94
Figure 3-12. Series 2000, weatherproof wall / z-purge.
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