Envent Engineering Ltd. Page 5 Revision 2.4
This unit requires a disconnect device rated 240 VDC and 5A max. It must be
protected by a circuit breaker rated 240 VDC and 5A max, and it is to be installed in
accordance with local electrical codes.
Envent Engineering H
2
S Sensing Tapes are suitalbe for use, if stored in the original
sealed package, for 10 years fron date of manufacture. Tapes should be stored in a
coll dry location. If the seal on the package has been broken in storage, the H
2
S
Sensing Tape should be discarded.
Warning & Cautions for 330S Analyzer Only
Substitution of components may impair intrinsic safety and suitability for Class I,
Division 1.
Open circuit before removing cover.
Ensure that the analyzer received is suitable for the electrical classification of the
installation site:
• The 330S is designed for Class I, division 1 Groups CD
or Groups BCD (Check Analyzer Nameplate)
The glass window on the XP enclosure must remain installed in order to maintain area
classification.
Seals not poured. Pour seals before energizing the circuit).
Analyzer may utilize an optional CCS, Model 646 Series pressure switch located on
the side of the XP enclosure:
• Dual seal, MWP 500psi
• Annunciation is visible leakage from the pressure adjustment cover (flow from
this cover can indicate the possibility that a failed primary seal condition could
exist in the pressure switch).
Warning & Cautions for 331S H
2
S Analyzer Only
Substitution of components may impair suitability for Class I, Division 2.
The eductor is required with this model in order to maintain electrical safety and
certification in division 2 areas.
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