Envent Engineering Ltd. Page 12 Revision 2.4
INSTALLATION
Installation Requirements
Electrical Requirements
The 330S/331S H
2
S analyzer's controller board can either be 110-240VAC or 10-
32VDC. Consult the analyzer nameplate attached to it or factory calibration certificate
for more information.
Controller board ground connection to chassis is represented by the letters “FG” and
ground symbol.
Certification nameplate shows the voltage range at which the controller board can
withstand (e.g., 120 – 240 VAC), however, when using external devices which are
powered by the controller board (e.g., solenoids), that voltage range no longer applies
and only the external device’s voltage rating shall be used; e.g., 120 VAC rated
solenoid, the analyzer shall be powered with only 120 VAC and not 240 VAC.
The power consumption for a VDC analyzer is 3 Watts and for a VAC is 5 Watts. For
the total sulfur option the power consumption 300 Watts.
Location for the System
First to be considered is the electrical area classification the analyzer will be installed
in. Make sure the analyzer meets the requirements for the installation site. The 330S
H
2
S analyzer is suitable for Class I, Division 1 Groups CD (or Groups BCD by
customer request). The 331S H
2
S analyzer is suitable for Class I, Division 2 Groups
ABCD.
When the total sulfur option is used, the 330S is rated for Class I, Division 1 Groups
BCD and the 331S is for Class I, Division 2 Groups BCD.
The 330S/331S H
2
S analyzer should be mounted in an area in which it is not exposed
to vibration, excessive pressure, temperature and/or environmental variations. The
ambient temperature range for the 330S/331S H
2
S analyzers is 0 to 50 Degree
Celsius. If the analyzer is installed in an area where temperatures go out of this range
or it varies abruptly, Envent Engineering Ltd has options such as cabinets or shelters;
consult Envent Engineering Ltd.
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