BJM Pumps SX75CSSF-575T - Manual (Page 25)

25
SEAL MINDER® - THERMAL MOTOR SENSOR SWITCH
(For high temperature pump models)
Seal Minder:
Also known as a seal failure circuit (or moisture detection circuit) is designed to inform the pump
operator that there is moisture within the oil chamber. This early warning can allow the operator to
schedule repair & inspection on the pump. The Seal Minder sensor probe is inside the oil chamber.
(The oil chamber houses the mechanical seals that are cooled & lubricated by oil). The Seal Minder,
when properly connected to a control panel, can help indicate seal failure. The Seal Minder cord
requires a seal fail circuit in control panel for warning signal.
Along, with the Seal Minder, the Fahrenheit
™ Series high temperature pumps also feature
thermal temperature sensor switches that are imbedded into the motor stator windings. Three
switches are imbedded into the stator windings and wired in series. The leads are connected to the
pump control panel through the sensor cable. If the windings would see a temperature above 300
degrees F, then the switch(s) would open and cut power to the pump. Once the temperature dropped
below 300 degrees F, the switch(s) would reset, and the pump would be returned to a state of
operation. This feature is designed to prevent damage to the stator winding and allow for longer pump
life.
The sensor cable consists of four leads, two are connected to the Seal Minder, and two are
connected to the thermal sensor switches located in the stator windings. These four leads run to the
pump control panel and connect to the proper connections points for seal alarm and thermal cut off.
The black and white wires are for the Seal Minder connections and the thermal sensors will be
connected to the yellow and red wires. The three phase automatic wiring diagram shown earlier in the
manual will give a guide to the connections in the control panel. The manual for the control panel
should be consulted for the exact connections.
The sensor cable with Seal Minder and thermal sensor switch connections is standard on all
Fahrenheit
™ Series high temperature pumps. The cable is designed for a high temperature
environment. The proper replacement part can be found parts list found in this manual. BJM Pumps,
can supply a control with the Seal Minder and Thermal sensor switch option. Separate stand alone
Seal Minder alarm panels are also available. Consult your BJM Pumps representative for part
numbers and ordering details. BJM Pumps requires the Seal Minder and thermal sensor switches be
used. Failure to connect or misuse of these devices will void warranty.