Marco UP Series Electric Pump Electronic
In case you need to replace an electronic sensor with a new one with the replacement kit.
Groove Joint Pliers(1)
Slip Joint Pliers(1)
Not compulsory, but makes the job easier.
17 mm Wrench(1)
Step 1— Prepare the tools
The additional sensor with the joint
and the heat shrink tubing is
available as a replacement kit on
Kits are only available as a
registered user, and can be seen for
each pump in their dedicated tab on
Step 2— Cut the plastic tie
Free the cables by cutting the plastic
Don't cut the cables that connect the
sensor to the pump.
Don't damage the cables' insulation
while cutting the plastic tie.
Step 3— Cut the joint between the sensor and the motor
Use the pliers to cut the red and black cables before and after the joint.
Step 4— Remove the old sensor
Use the 17mm wrench to unscrew the sensor.
Step 5— Screw in the new sensor
Screw the new sensor by hand for the initial part.
Step 6— Tighten the sensor
Use the wrench to tighten it in place.
Don't over-tighten the screw!
Don't add PTFE tape on the screw:
there's already an o-ring to seal the
connection and it may cause
problems to the non-return valve
(check valve) underneath.
Step 7— Check how long you want to strip off the cable
Use the joint as a reference on how
much you need to remove.
Keep in mind that you want to have
as much wire inside as possible, but
you want to avoid that the peeled
wire exits the joint.
Step 8— Strip off the cables' sheath
Use the cutting plier or (if you have
it) the stripping plier to remove the
Try to be careful: you don't want to
cut the wires inside, especially on
the larger pumps.
Step 9— Insert the heat shrink tubing
Insert the heat shink tubing on both motor's cables.
Step 10— Insert the metal joints
The cable has to be totally inside the
metal joint: if you have a longer
peeled cable, cut it a little to have it
aligned as in picture.
Don't insert the plastic sheath inside
the metal joint: it worsens the
connection and may cause
overheating in the large pumps!
Step 11— Press the metal joint
Start on the motor side, and press the metal joint on the cable.
To have a stronger force in closing the joint use the internal part of the plier, as showed in the
Proceed with by inserting the other end,the short cable-coming from the sensor.
Repeat the process also for the other cable.
Step 12— Cover the metal joints with the heat shrink tubing
Insert the heat shrink tubing.
Make sure that it covers perfectly the joint (it must be centered!) on both ends .
Step 13— Heat the tubes
Heat the tubes until they shink on the joint evenly.
Don't heat too much: you may melt the cables.
If you don't have a heat gun, you may also use a lighter, but don't touch the plastic with the flame:
keep some distance.
Step 14— Loop the wires
Loop the wires as shown in the pictures.
Step 15— Add the plastic strap
Fix the cables using the plastic strap.
Cut the excess of the plastic strap using the cutting pliers.
Step 16— You're done!
You can now enjoy your updated