• 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).
Permitted liquid level for ATEX
ATEX-approved products must be fully submerged according to the ATEX approval.
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
MSHA requirements
According to the United States of America's Code of Federal Regulations, the following
requirements must be fulfilled to maintain Mine Safety and Health Administration (MSHA)
permissibility of this equipment:
Subject area Requirements
General safety • Frequent inspections must be made.
• All electrical parts, portable cable, and wiring must be kept in a safe condition.
• There must not be any openings into the casings of the electrical parts.
• The machine frame must be effectively grounded (earthed).
• Power wires must not be used for grounding (earthing) .
• The operating voltage must match the voltage rating of the motor.
1 Introduction and Safety
Flygt 2190, 2201 Installation, Operation, and Maintenance Manual 5
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