• 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 parts that are provided by an Ex-approved Xylem representative.
• The thermal detectors fitted to the stator windings shall be connected into the motor
control circuit in such a manner as to disconnect the supply to the motor in order to
prevent the Temperature Class T3.
• The width of flameproof joints is more than the values specified in the tables of the IEC
60079–1 standard.
• The gap of flameproof joints is less than the values specified in Table 1 of the IEC
60079–1 standard.
• The equipment must be submerged during normal operation.
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. Condition-monitoring devices
include but are not limited to the following:
• Level indicators
• Temperature detectors
1.5 Special hazards
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.
Wash the skin and eyes
Follow these procedures for chemicals or hazardous fluids that have come into contact
with your eyes or your skin:
Condition Action
Chemicals or hazardous fluids in
eyes
1. Hold your eyelids apart forcibly with your fingers.
2. Rinse the eyes with eyewash or running water for at least 15 minutes.
3. Seek medical attention.
1 Introduction and Safety
Flygt 3085 Installation, Operation, and Maintenance Manual 5
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