User guide

Replacement of the motor of the Koi Pro Combi Drum

To replace the motor of the Combi Drum, you need the following tools:

• hex keys
• small screwdriver
• Phillips screwdriver
• wrenches
• torque wrench
• pipe wrench

Step 1: Preparation

Unplug everything so that there is no power on the electronics. See to it that the water is out of the filter as much as possible, so that no water can come into contact with the electronics during (dis)assembly. Use a pipe wrench.

Visual Description: A hand is shown holding the motor cap, revealing the hex head bolts that need to be unscrewed.

Step 2: Remove Motor Cap

Start with removing the cap of the motor by unscrewing the hex head bolts.

Visual Description: A close-up view shows the motor cap being unscrewed by turning the hex head bolts.

Step 3: Disconnect Wires

Unscrew the electric wires and remove them from the terminal block. Then unscrew the ground wire and put the cover with the wires stuck in it to one side.

Visual Description: Electric wires are being disconnected from the motor's terminal block. The ground wire is also being unscrewed.

Step 4: Motor Position Check

Now there are 2 options regarding the position in which the motor is mounted: if the white coil is up (as shown in the image for Step 4), then continue with Step 6. If the white coil is down (as shown in the image for Step 5), then continue with Step 5.

Visual Description (Step 4): The motor is mounted with the white coil facing upwards.

Visual Description (Step 5): The motor is mounted with the white coil facing downwards.

Step 5: Access Locknut (if coil is down)

If the white coil is down, it is difficult to reach the locknut of the shaft. To have good access to it, completely loosen the 2 bolts holding the coil so that you can remove the coil completely. As you replace the complete motor, there is no need for keeping the coil on.

Visual Description: The text indicates that if the coil is down, loosening two bolts holding the coil provides better access to the shaft's locknut, allowing the coil to be removed.

Step 6: Loosen Shaft Locknut

Loosen the 17mm locknut of the shaft while holding the drum so that it cannot rotate.

Visual Description: A hand is holding the drum to prevent rotation while another hand uses a wrench to loosen the 17mm locknut on the motor shaft.

Step 7: Loosen Motor Bolts

Now loosen the bolts holding the motor to the filter.

Visual Description: Bolts that secure the motor to the filter housing are being loosened.

Step 8: Remove Old Motor

Remove the locknut completely and carefully remove the motor from the shaft. Make sure that the seal ring around the shaft does not fall and you lose it.

Visual Description: The locknut is fully removed, and the old motor is being carefully pulled off the shaft. A seal ring is visible on the shaft.

Step 9: Install New Motor

Now place the new motor over the shaft and screw the motor back to the filter wall with the hex head bolts as it was.

Visual Description: A new motor is being positioned onto the shaft, and then attached to the filter wall using the hex head bolts.

Step 10: Tighten Shaft Locknut

Now tighten the locknut of the shaft with a torque wrench at 65 Nm. Again, make sure that you (or someone helping) hold the drum so that it cannot rotate.

Visual Description: A torque wrench is used to tighten the locknut on the new motor's shaft to 65 Nm, while the drum is held steady to prevent rotation.

Step 11: Rotate Motor

Then loosen the two screws on the new motor and turn the motor 180° so that the coil is pointing down again. Make sure that the black ring in this block remains in the right place.

Visual Description: The screws on the new motor are loosened, and the motor is rotated 180 degrees. A black ring within a component is noted to remain in place.

Step 12: Reconnect Ground Wire

Screw the motor in this position, reconnecting the ground wire.

Visual Description: The motor is now in its final orientation, and the ground wire is being reconnected.

Step 13: Connect Power Wires

Attach the supplied cable shoes over the contacts on the motor (it does not matter where the brown and blue wire are) and screw them back into the terminal block.

Visual Description: Electrical wires, identified as brown and blue, with attached cable shoes, are being connected to the motor's terminal block.

Final Instructions

• Now screw the protective cap back on as it was.
• Let water flow into the filter again and check that everything is watertight.
• Then turn everything on and check for proper operation.
• Your filter is now ready for normal use again.