Installation, Electrical; Commissioning - ProMinent alpha Series General Operating Instructions

ProMinent ProMinent ® ®
Other important considerations for dosing pumps in ex-zones
9.5

Installation, electrical

WARNING
• Zero-volts switches can be rated as simple electrical equipment (EN 60079-14 or
EN 50020).
• Both zero-volts and extra-low voltage circuit-breaking accessories such as diaphragm
–rupture indicator, stroke rate equipment, etc. may only be connected to an intrinsically
safe electrical circuit in ex-zones.
• If several electrical components are connected together, the safety of the entire
connection needs to be tested and confirmed in accordance with safety regulations.
This can be evidenced by means of a declaration of conformity from the supplier
(ProMinent) for the equipment in its entirety, or if components are delivered
individually, by means of a document from the operator confirming the components to
be explosion-proof.
• For electrical components in ex-zones you may only use the approved motor
protection switch, mains switch and fuses in accordance with the manufacturer's
specifications for the application in the relevant ex-zone!
• Observe the documentation attached for the individual electrical components!
• Observe the relevant national directives with regard to installation!
For hydraulic equipment switches in macro-hydraulic diaphragm dosing pumps
(diaphragm rupture sensor, excess pressure sensor):
These switches may be used in areas where there is a risk of gas explosions, category II 2G.
WARNING
• The switches may only be connected to an intrinsically safe electrical circuit! Only use
switches with a blue connection cable!
• The data in the operating instructions manuals is specific to the design of the switches!
Lower values apply in an intrinsically safe electrical circuit, according to the ex-zone!
NOTE
You may disregard the inductivity and capacity of the cable (cable length less than 10m).
Motor
WARNING
• Drive motors should be protected by a suitable motor protection switch. For Ex"e"
motors you should use a motor protection that has been approved for this application.
(Protection against overheating due to overload)
• Motors may only be installed and checked in ex-zones by a "recognised qualified"
person!
• Observe the attached operating instructions manual for EX motors!
9.6

Commissioning

WARNING
• The following applies to all dosing pumps when metering combustible media: Start up
and drain only under the supervision of an appropriately qualified person.
• Combustible media may only be extracted with stainless steel dosing heads. In
exceptional circumstances, where stainless steel is not available, PTFE with carbon
can also be used. Our TT designs are manufactured from conductive synthetic
material. The operator should take special care in this instance due to reduced
mechanical stability.
Page 21