• Intrinsically safe circuits are normally required for the automatic level-control system by
the level regulator if mounted in zone 0.
• 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 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.
ATEX and IECEx
Pump Temperature Class Minimum Ambient
Temperature
Maximum Ambient
Temperature
• 3069.070
• 3069.090
• 3069.190
• 3069.770
• 3069.890
T3/T4 –20°C 40°C
FM
Pump Temperature Class Minimum Ambient
Temperature
Maximum Ambient
Temperature
• 3069.070
• 3069.090
• 3069.190
• 3069.770
• 3069.890
T3/T4 –20°C 40°C
Specific conditions of use
These are the specific product and product handling requirements for Ex-approved products
in potentially explosive atmospheres:
• The yield stress of fasteners must be in accordance with the approval drawing and the
product specification. The material specifications must at a minimum fulfill: ISO 3506
Grade A2 Class 70
• 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.
• It is NOT allowed to repair the flameproof joints.
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
The approval for explosion-proof products is predicated on a minimum permitted liquid level.
See
Technical Reference
on page 61.
Monitoring equipment
For additional safety, use condition-monitoring devices. Examples of condition-monitoring
devices include, but are not limited to, the following:
1 Introduction and Safety
Flygt 3069 Installation, Operation, and Maintenance Manual 5
EN
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