Electrical System; Motor Protection; Switch-On Types - Homa C237 WF3 Original Instruction Manual


The pump casing must be flooded, e.g. it must be filled completely with the medium and it must not
contain an air. The de-aeration can be carried out by means of suitable venting devices in the
system or, if available, by air-vent screws on the pressure socket.

Check accessories, pipework, suspension devices for firm and correct fitting

Check available level controls/protection against dry run

5.5. Electrical system

The respective local and VDE regulations must be complied with when choosing and installing the electrical leads
as well as connecting the motor.
Electric shock hazard!
Faulty dealing with current may jeopardize your life! All pumps with free cable ends must be connected
by a qualified electrician.

5.6. Motor protection

Single phase motor
Pumps with 230 V/single phase motors are provided with an operation capacitor on delivery.

5.7. Switch-on types

Switch-on types with plug
Insert the plug into the socket provided for.
Adjustable humidity sensor switch for Type C238 WS3
The pumps are equipped with an integrated moisture sensor.
On delivery, the pump turns on at a water level of 120 mm and turns of again at 40 mm.
To adjust switch-on and switch-off points, open the black box on the side of the pump. To do this, unscrew the
two screws and pull the black cover upwards. You will now see three sensors. You can move them up and down.
Undo the screw, move the sensor to the new position and tighten the screw again.
With the Sensor 3, you can change the starting point of the pump. This can be positioned between 5 mm and 145
mm.
With Sensor 2, you can set the switch-off point. This can be positioned between 1 mm and 40 mm.
The Sensor 1 must always correspond with the Sensor 2. It must never be above the middle sensor. This is
structurally ensured by a stop on Sensor 2.
If the Sensor 1 and 2 are in the lowest position, the pump pumps the water up to a residual amount of 1 mm.
After setting the sensors, the black cover must be mounted with the two screws.
If the sensors were removed with the bracket for cleaning or maintenance work, it is important to ensure
that they are remounted in the correct order. The sensors may not be switched out under any circumstances.
Automatic humidity sensor switch for Type C237 WF3
The pumps are provided with a humidity sensor switch which already switches them on with a water level of 4.5
mm and pumps out the water to a level of 2 mm. The sensor switch is connected to the pump via a cable.
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