WEGER WALTER GMBH DIWER EVO DP80 Series, Installation And Operating Manual

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Installation and Operating Manual Page
17
Printed: 02/2015
2.4.10. Risk of explosion (ATEX units)
Risk of explosion:
- When conveying potentially explosive air and gases.
Keep ignition sources away from ATEX units. Only use tools conforming to EN 1127-1
to prevent sparks.
- From electrostatic charging of unit:
All electrical, non-conductive connections must be equipped with potential
equalization connections. The unit must be connected to an earthing conductor.
- From sparks produced by fan operated at a speed outside the permissible range in a
potentially explosive atmosphere.
Never exceed the maximum permissible fan speed.
- When the unit is shut down, the concentration level of the gas/air in the system
increases.
Keep all ignition sources away from the unit.
2.4.11. Risk of damage to property and the environment
Do not make unauthorised modifications to the unit. Only use original spare parts.
Operate the unit only with the permissible parameter settings.
Unloading and transport
- Serious damage to property from dropping loads;
please observe the instructions in section 3 "Delivery of product".
- Serious damage to heat exchanger connections, panelling and other mounted
components from force impact during moving of unit elements;
always move the unit elements by their base frame.
- Risk of damage to components from heavy impact, e.g. when attempting to dislodge a
part with a hammer, etc:
Components that rest on the foundation must only be moved by shifting.
Risks caused by fans
- Risk of mechanical damage to fan unit, due to critical input speed and operation within
resonance range:
The frequency range of the speed-controlled drives must be determined, bridged and
noted down during commissioning. Observe the instructions regarding overall pressure
increase, maximum permissible speed and direction of rotation of the fan in the fan
chamber.
- Risk of damage to fan due to excessive power to motor, resulting in excessive fan
speed:
Constantly monitor the power consumption of the motor.