WDM NE Series, Operation Manual

Page: 8 / 28

Operation Manual.
8
Do not leave the electrical wire exposed, as it may cause serious
damage. The black, white, and red wires are all energy carriers or
conductors. The green wire is the grounding wire.
Overload protection:
For 3 phase pumps a normally closed (N/C) temperature sensor has
been embedded to detect when the motor is overheating because of
overload conditions. These thermal sensors trigger a shutdown when
the motor is too hot, and will automatically restart the pump once the
motor has cooled to a safe temperature. We recommend connecting
the sensors to an alarm that alerts the operator an overheating
situation has occurred and to stop the operation. If this situation
occurs, it should be reviewed to determine the cause and correct the
situation.
Humidity sensor
A normally open (N/O) contact is installed in the seal chamber in
order to detect if any moisture is present in the pump. We
recommend that this sensor be connected to an alarm to alert the
operator that moisture has been detected. If moisture is detected the
pump should be inspected and repaired.
ATTENTION.
Always use the installed handle, never the cord, to lift the
pump.
ATTENTION.
WDM does not supply all the accessories (valves,
gauges, pipes, extensions, etc.) mentioned in this operation
manual and installation.
ATTENTION.
Do not continue to operate the pump if an overload situation
arises.