Zehnder Pumpen ZFS 71 Ex, Руководство по эксплуатации

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4.3 Switching device
The pumps are delivered without switching device.
5. Installation
- Disconnect the power supply before carrying out any kind of work on the plant!
- The electrical connections are not to be exposed to humidity!
5.1 Electrical equipment
Safety regulations
•
All electrical equipment used must comply with the IEC 364 / VDE 0100 standard, i.e. sockets,
for example, must have earthing terminals.
•
The electrical connection may only be carried out by a qualified electrician! Observe the single-
part VDE 0100 regulations!
•
The electrical network to which the system is connected must have a highly sensitive separate
residual current circuit breaker IA <30 mA upstream of the control unit, or to prevent a failure
of the control unit when the residual current circuit breaker responds, one residual current cir-
cuit breaker per pump must be installed between control unit and pump. For installation in
bathrooms and showers, the relevant DIN VDE 0100 Part 701 regulations must be observed.
•
Please observe the regulations of EN 12 056-4.
•
The pump may only be operated with a motor protection relay that must be manually reac-
tivated after a fault has occurred!
•
In the case of a three-phase current connection, the external fuse protection must generally be
3-pole mechanically interlocked with automatic circuit breakers of characteristic K. This en-
sures complete disconnection from the mains and prevents 2-phase operation.
•
All electrical devices such as control system, alarm transmitter and socket must be installed in
dry rooms so that they are protected against flooding.
•
Attention! Before any assembly and disassembly of the pump or other work on the system, it
must be disconnected from the electrical mains.
•
If the mains connection cable of this unit is damaged, it must be replaced by the manufacturer
or his customer service or a similarly qualified person in order to avoid hazards.
•
Overloading can cause the motor to overheat. Never touch the hot surfaces of the motor when
it overheats.
•
If an extension cable is used, it must be of the same quality as the connection cable supplied.
The AC-powered model of the pump can be operated with an auxiliary switch device which is equipped with the
following elements:
main switch, fuses, contactors, thermal motor protection relay, operating capacitor, restart lockout for the clipping
circuit, signal lamps „Betrieb“ (operation) and „Störung“ (malfunction), Ex i - relay and a floater for the protection
against dry running.
The pump is connected to an earthed wall socket with an earthed type plug by means of the cable which is connected
to the switching device.
- The switching device has to be installed outside the explosion-prone area!
- The floater for the protection against dry running has to be installed in such a way, so that a decline of
the water level below the bottom line of the motor housing is not possible.
Further electrical installation is not necessary. If required, the motor housing can additionally be earthed by means
of the external earthing terminal intended for that.