2.3 Hazardous Gasses
When hazardous gases (such as poisonous, flammable, or oxygen depleting) are potentially
present in or around the Maxum II area, all national and international safety requirements must
be fulfilled to protect personnel and the environment against hazards that could arise. All
process conditions (such as normal, backup, and upset) must be considered in the
determination for potential hazardous gas presence.
Scheduled preventive maintenance and inspection for leaks should be performed by the
customer. Minimize leak sources by external venting of the oven exhaust and analyzer vents.
This reduces but does not eliminate the sources for leaks, so personnel protection is a
requirement whenever hazardous/poisonous gases may be present. Disregarding this warning
could result in serious injury or death and damage to equipment.
2.4 Location
Each Maxum II is manufactured and tagged for a specific hazardous area classification. Each
unit must be installed in an area that is suitable for this area classification.
WARNING
T-Rating
Each unit is tagged with a T-rating which quantifies the maximum surface temperature that
may occur in the instrument. The user must ensure that no combustible gas concentrations
will be present, whether on a continual or occasional basis, which has an ignition temperature
below the T-rating of the unit.
The analyzer house should be located as close as possible to where the sample is to be
obtained to minimize the sample transit time. It is preferable that this distance be less than 30
m (100 feet).
The analyzer house must be large enough to allow ample access for installing, operating, and
maintaining the analyzer. The concrete slab for the analyzer house should be large enough to
accommodate gas cylinders located on the outside. Make sure to secure the cylinders using a
cylinder rack or chain guard.
Space inside for the analyzer must be at least 229 cm high by 127 cm wide by 102 cm deep (90”
high by 50” wide by 40” deep). The height may be somewhat less if there is no sampling system
cabinet or panel beneath the analyzer, or if the analyzer is a Maxum II Modular Oven. See the
Maxum II Outline Drawings in Maxum II Official Product Specifications (https://
support.industry.siemens.com/cs/document/109742522/).
Safety notes
2.4 Location
Installation Manual
10 Installation Manual, 12/2019, 2000595 Rev 1
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