Wilo DD-I, Installation And Operating Instructions Manual

Page: 99 / 196

Safety en
Installation and operating instructions Wilo DD-I 99
2 Safety
2.1 Personnel qualifications
Electrical connection
Personnel must meet the following prerequisites:
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Qualified electrician
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Network skills to assemble network cables
Operation
Operating personnel must meet the following prerequisites to configure and operate
pumps:
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Safe handling of web-based, English user interfaces
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Specialist language skills, particularly in English, for the following specialist areas
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Electrical engineering, specialising in frequency converters
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Pump technology, specialising in operating pump systems
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Network technology, configuring network components
Definition of “qualified electrician”
A qualified electrician is a person with appropriate technical education, knowledge and
experience who can identify
and prevent electrical hazards.
2.2 Electrical work
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Electrical work must be carried out by a qualified electrician.
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Before commencing work, disconnect the product from the mains and safeguard it
from being switched on again.
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Observe applicable local regulations when connecting to the mains power supply.
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Adhere to the requirements of the local energy supply company.
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Earth the product.
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Observe technical information.
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Replace a defective connection cable immediately.
2.3 Functional safety
Note the following if the pump is operated within explosive environments:
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Install dry-running protection and connect using an Ex-i evaluation relay.
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Connect level sensor via a Zener barrier.
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Connect thermal motor monitoring using Ex-certified evaluation relay. It is possible
to retrofit the "MCB 112" PTC thermistor card in the frequency converter for a con-
nection to the Wilo-EFC!
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In connection with a frequency converter, connect dry-running protection and
thermal motor monitoring to the Safe Torque Off (STO).
SIL level
Provide safety equipment with SIL-Level 1 and hardware fault tolerance 0 (according to
DIN EN 50495, category 2). Consider all components within the safety circuit for system
assessment. Refer to the individual components' manufacturer’s instructions for the re-
quired information.
The built-in capacitive sensor CLP01 is type-tested separately according to guideline
2014/34/EU. The label is: II 2G Ex db IIB Gb.
2.4 Data security
All network requirements, in particular network security requirements, must be com-
plied with to integrate the product into the network. For this purpose, buyers or oper-
ators must comply with all valid, national and international directives (e.g. Kritis Direct-
ive) or statutory stipulations.
2.5 Emergency operation in applica-
tions critical to safety
The pump and frequency converter are controlled by the parameters input at the corre-
sponding device. The pump also overwrites the frequency converter's parameter set 1
in LPI and LSI mode. We recommend creating a backup of corresponding configurations
and saving them in a central location to guarantee fast troubleshooting.
NOTICE! It is possible to save a further configuration in the frequency converter in
applications critical to safety. In the event of a fault, the frequency converter can be
operated in emergency operation using this configuration.