Wilo FK 17.1 - Page 174

en Installation and electrical connection
174 WILO SE 2019-01
FK 17.1 FK 202 FK 34 FK 42
External monitoring units
Sealing chamber
o o o o
Key: − = not available/possible, o = optional, • = as standard
All the monitoring devices fitted must always be connected!
6.5.4.1 Motor compartment/sealing
chamber monitoring
Connect the electrodes via an evaluation relay. Relay “NIV101/A” is recommended for
this. The threshold is 30kOhm.
Wiring diagram
DK
Electrode connection
The system must be deactivated when the threshold is reached!
6.5.4.2 Monitoring of motor winding
With bimetallic strips
Directly connect bimetallic strips to the switchgear or via an evaluation relay.
Connection values: max. 250V(AC), 2.5A, cos φ=1
Wiring diagram for bimetallic strip
Temperature limiter
20, 21
Bimetallic strip connection
Temperature controller and limiter
21
High temperature connection
20
Centre terminal
22
Low temperature connection
With PTC sensor
Connect the PTC sensor via an evaluation relay. Relay “CM-MSS” is recommended for
this. The threshold has been preset.
PTC sensor wiring diagram
Temperature limiter
10, 11
PTC sensor connection
Temperature controller and limiter
11
High temperature connection
10
Centre terminal
12
Low temperature connection
Triggering status for temperature controller and limiter
Depending on the version of the thermal motor monitoring, the following triggering
status must occur when the threshold value is reached:
▪Temperature limiter (1temperature circuit):
The system must be deactivated when the threshold is reached.
▪Temperature controller and limiter (2temperature circuits):
When the threshold for the low temperature is reached, the motor can deactivate with
automatic reactivation. When the threshold for the high temperature limit is reached,
the motor must deactivate with manual reactivation.
Note the additional information in the section on potentially explosive areas in the
appendix!
6.5.4.3 Monitoring of motor bearing
Connect the Pt100 sensor via an evaluation relay. Relay “DGW2.01G” is recommended
for this. The threshold is 100°C (212°F).
Wiring diagram
T1, T2
Pt100 sensor connection
When the threshold is reached, deactivation must take place!