Level Control; Dry-Running Protection; Electrical Connection; Fuse On Mains Side - salmson Rocsan neo Serie Instalacion Y Puesta En Servicio

en
▶ The pump is installed, the qualified electrician can
make the electrical connection.
6.4.6

Level control

With a level control device, the current fill levels are de-
termined and the pump is switched on and off auto-
matically depending on the fill levels. Fill levels are re-
corded by using different sensor types (float switches,
pressure and ultrasound measurements or electrodes).
The following must be observed when using a level
control device:
▪ Float switches can move freely!
▪ The water level must not fall below the minimum per-
missible!
▪ The maximum switching frequency must not be ex-
ceeded!
▪ If the fill levels fluctuate strongly, a level control with
two measuring points is recommended. This makes it
possible to achieve larger differential gaps.
Use of attached float switch
The "A" version is equipped with a float switch. The
pump is switched on and off depending on the fill level.
The switching level is determined by the cable length
of the float switch.
Use of on-site level controls
When using an on-site level control device, refer to the
manufacturer's own installation and operating instruc-
tions for specifications on the installation.
6.4.7

Dry-running protection

Dry-running protection must prevent the pump from
operating without fluid and air from entering the hy-
draulics. Minimum permissible fill level must be de-
termined with the help of a signal transmitter. Once the
specified limit value is reached, the pump must be de-
activated with an appropriate signal. Dry-running pro-
tection can expand the available level controls by an
additional measuring point or function as an independ-
ent switch-off device. Depending on the system secur-
ity, the pump can be restarted automatically or manu-
ally. Installation of a dry-running protection is recom-
mended for optimum operational reliability.
6.5

Electrical connection

DANGER
Risk of death due to electrocution!
Improper conduct when carrying out electrical work
can lead to death due to electric shock! Electrical
work must be carried out by a qualified electrician in
accordance with the locally applicable regulations.
▪ The mains connection must match the specifications
on the rating plate.
44
Installation and electrical connection
▪ Power supply on mains side for three-phase current
motors with clockwise rotating field.
▪ Lay the power supply cables in accordance with the
locally applicable regulations and connect them ac-
cording to the wire assignment.
▪ Connect the monitoring devices and check their func-
tion.
▪ Earth the device properly in accordance with the locally
applicable regulations.
6.5.1

Fuse on mains side

Circuit breaker
The size of the circuit breakers conforms to the rated
current of the pump. The switching characteristics
should comply with group B or C. Observe local regula-
tions.
Motor protection switch
Make provision for an on-site motor protection switch
for devices without a plug! The minimum requirement
is a thermal relay/motor protection switch with tem-
perature compensation, differential triggering and
anti-reactivation device in accordance with the local
regulations. In case of sensitive mains, make provision
for the installation on-site of other protective equip-
ment (e.g. overvoltage, undervoltage or phase failure
relay, etc.).
Residual-current device (RCD)
Comply with the regulations of the local energy supply
company! The use of a residual-current device is re-
commended.
If persons come into contact with the device and con-
ductive fluids, secure the connection with a residual-
current device (RCD).
6.5.2

Maintenance tasks

Carry out the following maintenance tasks prior to in-
stallation:
▪ Check the insulation resistance of the motor winding.
▪ Test the resistor of the temperature sensor.
If the measured values differ from the specifications,
moisture may have penetrated into the motor or the
power supply cable or the monitoring device is defect-
ive. Contact customer service in the event of a fault.
6.5.2.1 Checking the insulation resistance of the motor
winding
Use an insulation tester to measure the insulation res-
istance (measuring voltage = 1000 V). Observe the fol-
lowing values:
▪ At the time of initial commissioning: Insulation resist-
ance may not be less than 20 MΩ.
▪ For further measurements: Value must be greater than
2 MΩ.
Wilo Salmson France SAS 1703