Wio Sensor (Water-In-Oil Sensor); Fitting The Wio Sensor; Moisture Switch - Grundfos SL1 Notice D'installation Et De Fonctionnement

Explosion-proof pumps
Warning
The thermal protection of explosion-proof pumps
must not restart the pump automatically.
This ensures protection against overtemperature
FM
in potentially explosive environments. In pumps
with sensor this is 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.
Warning
FM
The separate motor-protective circuit breaker/
controller must not be installed in potentially
explosive environments.

9.4 WIO sensor (water-in-oil sensor)

The WIO sensor measures the water content in the oil and
converts the value into an analog current signal. The two sensor
leads are for power supply and for carrying the signal to the
IO 113. The sensor measures the water content from 0 to 20 %.
It also sends a signal if the water content is outside the normal
range (warning), or if there is air in the oil chamber (alarm).
The sensor is fitted in a stainless steel tube for mechanical
protection.
Fig. 13 WIO sensor

9.4.1 Fitting the WIO sensor

Fit the sensor next to one of the shaft seal openings. See fig. 13.
The sensor must be tilted into the motor's direction of rotation to
ensure that oil is led into the sensor. Make sure that the sensor is
submerged in the oil.
9.4.2 Technical data
Input voltage: 12-24 VDC
Output current: 3.4 - 22 mA
Power input: 0.6 W
Ambient temperature: 32 to 158 °F (0 to 70 °C)
See also the installation and operating instructions for IO 113 on
www.grundfos.us.
18

9.5 Moisture switch

All pumps are fitted with a moisture switch as standard, with the
moisture switch being connected via the supply cable, see
section connection, and connected to a separate
9. Electrical
circuit breaker.
The moisture switch is positioned in the bottom of the stator
housing. If there is moisture in the motor, the switch will break the
circuit and send a signal to the IO 113.
The moisture switch is non-reversing and must be replaced after
use.
The moisture switch is connected to the monitoring cable, and it
must be connected to the safety circuit of the separate pump
controller. See section
9. Electrical
The motor-protective circuit breaker of the pump
controller must include a circuit which
Caution
automatically disconnects the power supply in
case the protective circuit for the pump is
opened.
9.6 IO 113
IO 113 provides an interface between a Grundfos wastewater
pump equipped with sensors and the pump controller(s).
The most important sensor status information is indicated on the
front panel.
One pump can be connected to one IO 113 module.
Together with the sensors, the IO 113 provides a galvanic
isolation between the motor voltage in the pump and the
connected controller(s).
IO 113 can do the following as standard:
• Protect the pump against overheating.
• Monitor the status of these items:
– motor winding temperature
– leakage (WIO)
– moisture in pump.
• Measure the stator insulation resistance.
• Stop the pump in case of alarm.
• Remotely monitor the pump via RS-485 communication
(Modbus or GENIbus).
• Control the pump via a frequency converter.
Warning
IO 113 must not be used for purposes other than
those specified above.
1 2
T1 T2 G1 A1 G2 A2 K1 K2 R1 R2
17
D1 D2 D3 D4 D5 D6 D7 D8
16
15
14
13
ON DIP
12
1 2 3 4 5 6 7 8 9 10 11 12
P1 P2 P3 P4 P5
11
Fig. 14 IO 113 module
connection.
3
PE
4
5
A Y B
6
7
8
9
I1 I2 I3
10