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Litter-Robot: OdorTrap® installation guide
Litter-Robot can be equipped with (3) OdorTrap® Packs that are installed on the outer bottom area of the globe. The packs sit directly over the waste drawer to eliminate odors. Our OdorTrap® Holder snaps right into the Litter-Robot filter cover and can fit up to three OdorTrap® Packs.
OdorTrap® Packs are sold separately and not required for the unit to function. We recommend replacing OdorTrap® Packs every 2-4 weeks for optimal performance.
Before you start
- The carbon filter and OdorTrap® Packs cannot be used together.
- The filter pocket is underneath the globe and sits directly over the waste drawer when Litter-Robot is in the Home position.

Preparing the unit
- Make sure the Litter-Robot is in the Home/Ready position.
- Tap "Replace Filter" under Controls in the Whisker app or on the control panel:
- Litter-Robot 5: Press and hold the Cancel button for 3 seconds.
- Litter-Robot EVO: Press and hold the Cancel button for 3 seconds.
- Litter-Robot 4: Press and hold the Cycle and Empty buttons on the control panel for 3 seconds.

- A clean cycle will begin; the cycle will pause when the globe reaches the “replace filter” position.
- Open the bonnet: Press and hold the latches on both sides of the bonnet, then lift and rotate the bonnet to its open position to reveal the filter pocket.

- Remove the filter cover: Lift the small notch to release the filter cover snaps from the globe.

6. Remove the carbon filter (if installed) and prepare to install the OdorTrap Holder and/or OdorTrap Packs.
Note: The filter pocket holds one (1) carbon filter. If using an OdorTrap Holder, it can hold up to (3) OdorTrap Packs. The carbon filter and OdorTrap Packs cannot be used together.

Installing the OdorTrap® Holder (if applicable)
- Open the OdorTrap Holder by unsnapping the two (2) side clips.

- Place the opened OdorTrap Holder on the filter cover. The center arrow on the OdorTrap Holder must line up with the small dot on the center of the filter cover.

- Flip the filter cover over and snap the two outer pieces of the OdorTrap Holder into the filter cover. Then snap the two inner pieces of the OdorTrap Holder into the filter cover.

- Place up to (3) OdorTrap Packs inside the OdorTrap Holder.

- Secure the OdorTrap Packs by closing the OdorTrap Holder (snap the side clips closed).

- Replace the filter cover in the filter pocket on the globe with the OdorTrap Holder facing down. Make sure the filter cover is completely flush with the globe to prevent obstruction while the globe rotates.

- If you do not have the OdorTrap Holder, place 3 OdorTrap Packs under the filter cover and reinstall the cover. Make sure the filter cover is completely flush with the globe to prevent obstruction while the globe rotates.
Final Steps
- Close the bonnet: Rotate the bonnet downward over the globe and push down on the bonnet from the top to make sure it is latched and secure.
Litter-Robot EVO: Replace the bonnet by aligning the tab at the back of the bonnet with the slot in the bonnet hinge. Rotate the bonnet downward with light pressure on the sides so that it hugs the globe. This will help ensure proper alignment of the bonnet latches and base.

- Short press the Cycle button to resume the clean cycle.

- Once the clean cycle is complete, zero the weight sensors.
- Litter-Robot 5: Short press the Cancel button.
- Litter-Robot EVO: Short press the Cancel button.
- Litter-Robot 4: Short press the Reset button.

Download PDF (English/Français/Deutsch/Italiano)
Whisker’s OdorTrap contains essential oils. While the majority of cats are not sensitive to the essential oils used in this product, be sure to carefully observe how your cat(s) reacts upon introducing OdorTrap. If irritation or other adverse reactions occur, discontinue the use of OdorTrap in your Litter-Robot.
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