Ametek Thermox WDG-V UOP, User Manual

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3-8 | Thermox WDG-V UOP IECEx/ATEX
Rapid Exchange Purge System
Connections
Connect instrument air to the sensor purge inlet. Maintain the pressure
and flow as directed on the purge warning label.
The purge apparatus provided by Thermox meets requirements for
hazardous locations under certain conditions.
• Do not exceed the maximum temperature rating listed in the Specifica -
tions section of this manual.
• The WDG-V UOP sensor contains a flame arrestor to prevent it from
being an ignition source to the process for short periods of high com-
bustible levels (25% of LEL - lower explosive limit) in the process.
The flame arrestor is not, however, intended to protect the process
where the combustibles levels are always high.
Purging Operation
“Safe” pressure, for purposes of this manual, is defined as between
0.15 and 0.35 inches of water column. Do not exceed “Safe” pressure
with the Enclosure Pressure Control Valve.
The regulator may be in the locked position upon arrival. To adjust
the regulator, pull the handle to the outward position.
Carefully insert T-bar valve key to align valve stem tip of both valves.
Practice locking and unlocking key in the RECV valve stem. Become
familiar with this process to ease operation of the system.
Operators must follow-step-by-step sequence in the Start-Up instruc-
tions found on the electronics box lid.