Grundfos SE - Startup

Sensor
version
Standard
and
Standard Ex
V1 and V1
Ex
V2
and
V2 Ex
Float switch
in leakage
chamber
● ● ●
Pt100 in
motor
winding
● ●
Pt100 in
upper bearing
● ●
Pt100 in
lower bearing
● ●
PVS3
vibration
sensor
● ●
SM113
(integrated in
the motor
top)
●
IO113 (not
integrated in
the motor
top)
●
Voltage tolerances
Component Voltage Tolerance
Motor
See the pump
nameplate
± 10 %
Thermal
switches
Maximum 24 V
DC
± 10 %
Thermistors 2.5 - 7.5 V -
Moisture
switches
12-24 V DC -
Other sensors
(optional)
Maximum 14 V
DC
± 1 V
SM 113
(optional)
Maximum 14 V
DC
± 1 V
Thermal switches
The motor-protective circuit breaker of the
pump controller must include a circuit
which automatically disconnects the power
supply in case the protective circuit is
opened.
In case the thermal switches or the
moisture switches are not working, install
an automatic circuit breaker.
Pt100 temperature sensor
The bearing temperature monitoring
system is only available as an option
(based on sensor version).
In Ex-approved pumps, the maximum
acceptable alarm temperature in the
bearing sensors is 100 °C for the lower
bearing (shaft end) and 120 °C for the
upper bearing.
The thermal protection of explosion-proof
pumps must not restart the pump
automatically. This ensures protection
against overtemperature in potentially
explosive environments. In pumps with
sensor, this can be done by removing the
short circuit between terminals R1 and R2
in the IO 113.
See electrical data in the IO 113 installation and
operating instructions.
Do not install the separate motor-
protective circuit breaker or control box
installed in potentially explosive
environments.
Pump vibration sensor (PVS 3)
Pumps are fitted with S-tube
®
impellers.
The S-tube
®
impellers are wet-balanced to
reduce vibrations during operation. If these
pumps are started with the pump housing
containing air, the vibration level can be
higher than in normal operation.
Startup
Pumps in dry installation must be vented.
Before the first startup and after a long
standstill period, make sure that the pump
is filled with the pumped liquid.
Make sure that the pump is filled with the
pumped liquid.
Dry-running is not allowed.
In case of abnormal noise or vibrations,
stop the pump immediately. Do not restart
the pump until the cause of the fault is
identified and eliminated.
23
English (GB)