The level sensors' target is to protect the pump from running dry while monitoring the water level and if
necessary sending a signal to the controller to switch off the pump.
The level sensors are three probes from a stainless steel. The probe should not be covered or to
touch conductible parts, so it can work properly.
If it is necessary to elongate the probes' cable, the cable which will be used must be with
suitable cross section, the connection should be welded and insulated with insulating tape and
thermal shrink hose.
2. Level sensors installation:
The cables of the three probes of level sensors must be connected to WH, WL and WC separately.
“WH” probe is installed in upper position to detect the water level in which the pump shoul start if it was
stopp
ed because of water level fall. “WL” probe is installed just over the pump, to detect the water level
where the pump wouldn't run dry. “WC” probe /common point/ is to be installed under the pump level.
Level sensors' working range is between probe “WH” and probe “WL”. When the water level is
lower than probe “WL”, the pump motor will stop working. When the water level raises up to
probe “WH”, the pump motor will start working again. Be careful for the distance between WH and
WL, it must be selected in such way, that the water level to raise for not less than 3 minutes.
17
1. cable
2. 0,5 mm
2
bare copper wire
3. coupleable rubber tape
4. plastic insulating tape
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