Instructions / Assembly

4. Locating the center for the hole.
Use the picture to locate the location for the hole for the 4” vent on your composting unit.
Once you have located the center, make a mark for the pilot hole.
5. Once you have marked the hole for the pilot, use a 1/8" drill bit to drill a small pilot hole on the mark.
6. Before you drill the 4" hole, place the 4.25" hole saw on the unit (as shown
above) with the pilot bit in the pilot hole you have drilled. Ensure that the allignment is exact before you drill.
Ensure that the hole is centered in the correct area (as shown in the the pictures above). Once you are
satisfied that the hole is in the proper location, proceed to step 7.
7. Using the hole saw. Make sure to press down with even pressure on the hole saw so that the blades bite
evenly into the top of the unit. Carefully apply firm pressure until the hole is cut in the unit.
8. : Use masking tape to secure the handle under the seat. This will ensure that the handle will
not end up at an odd angle when the fan is replaced. Once the handle is secure, ensure that the opening in
the drum is centered under the opening in the bowl liner. Slide the stainless steel shaft into the cone on
the bottom right corner of the fan plate. Once you have completed this step, you may proceed with replacing
the fan.
9. Replacing the fan:
Replace the fan plate over the hole in the unit from where it was removed. Line up the screw holes.
Insert the screws into the holes, making sure each screw has a CKS washer around the screw. Fasten
all 8 screws. Ensure that the screws are not to over-tightened. Replace the snap caps.
Excel
Centrex 1000
Centrex 2000
INSTALLING THE VENT
Place the vent inlet coupling into the hole that you have created for
the 4” vent so that the 1” of smaller diameter pipe is protruding into
the hole in the top of the unit. This is the first piece of the venting.
Once you have finished assembling the vent, you should run a bead of
silicone around the inlet coupling to prevent odor from escaping.
-The 12 volt fan should be used if there will be any bends in the
vent pipe configuration, if you have a Centrex 3000, if the toilet
will be used as an AF waterless toilet or if you are in an area
where you will experience regular downdraft.
-The 12 volt fan may not be necessary if the vent is installed
vertically as per specifications outlined under “Vent Pipe Location”.
- If you do choose to install the 12 volt fan (included with kit), it
must run continually for the duration of the time that you will
spend at your house or camp.
- If the 12 volt fan is not running, it will cause a blockage in the
vent pipe and will reduce the venting capacity of the 4” vent.
INSTALLING THE 12 VOLT FAN
Install the 12 volt fan on the inlet coupling with the large side with the wires protruding facing
upwards (as shown in the picture at right).
The 12 Volt Fan may be powered with a battery that is connected to a
generator, solar panel, or other alternative energy system. For use in AC,
purchase a 12 Volt to AC Adapter and snip off the female end. Wire the
positive wire to the red wire on the fan, and the negative wire to the blue wire on the fan. Tie
them off with wire connectors, and plug your AC Adapter into the wall.
Use silicone caulking to seal the conections between the inlet coupling where the bottom con-
tacts the composting unit and all connections on the vent. Do not glue the fan to the vent
stack.
INLET COUPLING
12 VOLT FAN
Centrex 3000
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