• Intrinsically safe circuits are normally required for the automatic level-control system by
the level regulator if mounted in zone 0.
• The yield stress of fasteners must be in accordance with the approval drawing and the
product specification.
• Do not modify the equipment without approval from an Ex-approved Xylem
representative.
• Only use original Xylem spare parts that are provided by an Ex-approved Xylem
representative.
• The thermal contacts that are fitted to the stator windings must be connected correctly
to a separate motor control circuit and in use. The thermal contacts shall be connected
to a monitoring device, which disconnects the power supply immediately upon
activation. This action prevents the rise of temperatures above the temperature value
for the approval classification.
• The width of flameproof joints is more than the values specified in the tables of the EN/
IEC 60079-1 standard. For information contact the manufacturer.
• The gap of flameproof joints is less than the values specified in Table 2 of the EN/
IEC 60079-1 standard. For information contact the manufacturer.
• It is NOT allowed to repair the flameproof joints.
• Ambient temperature: –20°C to 60°C
Guidelines for compliance
Compliance is fulfilled only when you operate the unit within its intended use. Do not
change the conditions of the service without the approval of an Ex-approved Xylem
representative. When you install or maintain explosion proof products, always comply
with the directive and applicable standards (for example, IEC/EN 60079–14).
Minimum permitted liquid level
See the dimensional drawings of the product for the minimum permitted liquid level
according to the approval for explosion proof products. If the information is missing on
the dimensional drawing, the product must be fully submerged. Level-sensing equipment
must be installed if the product can be operated at less than the minimum submersion
depth.
Monitoring equipment
For additional safety, use condition-monitoring devices. Examples of condition-
monitoring devices include, but are not limited to, the following:
• Level indicators
• Temperature detectors in addition to the stator thermal detectors
Any thermal detectors or thermal protection devices delivered with the pump must be
installed and in use at all times.
The site owner is responsible for selection, installation, and proper maintenance of
functional monitoring equipment for motor protection.
1.5 Special hazards
1.5.1 Biological hazards
The product is designed for use in liquids that can be hazardous to your health. Observe
these rules when you work with the product:
• Make sure that all personnel who may come into contact with biological hazards are
vaccinated against diseases to which they may be exposed.
• Observe strict personal cleanliness.
WARNING: Biological Hazard
Infection risk. Rinse the unit thoroughly with clean water before working on it.
1 Introduction and Safety
Flygt 3102 Installation, Operation, and Maintenance Manual 5
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