Ametek Thermox WDG Insitu User Manual page 34

3-10 | Thermox Series 2000 WDG Insitu Analyzer
Weatherproof Wall/Z-Purge option
Figure 3-11 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 pressure 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 enclosure has
been purged for 1 hour at a pressure of 0.4" of water.
12.00
Flange
30.48
8.00
20.32
1/8" Compression Fitting
Figure 3-11. series 2000, weatherproof wall / z-purge.
7.50
19.05
5.88
14.94
Pressure
Gauge
Exhaust
Restriction
1/2" Conduit
Entry (2.22 cm)
Metering Valve
Purge Air Inlet
5.31
13.49
Two 3/4" Conduit
Entries (2.70 cm)