clivus multrum CM20 User manual

CM20
INSTALLATION MANUAL
AUS | NZ
IMCM-20.291121
Lic No. SMKH25591
AS/NZS 1546.2
SAI Global

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TABLE OF CONTENTS
CM20 TANK ITEMS 3
PEDESTAL ITEMS 3
DRAIN ITEMS 4
VENT ITEMS 4
CONSUMABLES 4
URINE DIVERSION 5
OPTIONAL FOR URINE DIVERSION 5
TOOLS REQUIRED 5
MATERIALS REQUIRED 6
INSTALLATION SUMMARY 6
CONDITIONS 6
POSITIONING THE TANK 7
TANK SUPPORT 7
EXCESS LIQUID DRAIN INSTALLATION 8
OPTIONAL ZERO DISCHARGE INSTALLATION 8
TOILET CHUTE & PEDESTAL 9
PEDESTAL INSTALLATION 12
INSTALLATION OF VENTILATION SYSTEM 12
STARTER-BED OF ORGANIC MATTER 15

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1x TOILET CHUTE
COLLAR
1x CM20 TANK
CM20 TANK ITEMS
1x TOILET
CHUTE
1x SILICONE
SEALANT
1x MAINTENANCE RAKE
PEDESTAL ITEMS
16x ROOFING
SCREWS
1x PEDESTAL &
TOILET SEAT
SEALANT
1x ‘HOW TO
USE’ SIGN
How to use:

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1x VENT COWL
3x SLIP JOINERS
100mm
1x FAN IN HOUSING
1x TRANSFORMER
1x LIQUID DRAIN PIPE
CONNECTOR 50MM
VENT ITEMS
DRAIN ITEMS
1x WALLACE SEAL
100mm
2x 45° BEND 50MM
4x VENT PIPE SECTIONS
1x 90° BEND 100mm 2x VENT SUPPORT
BRACKETS & 4
SCREWS
1x 125mL
ENZYME
BULKING
MATERIAL
7x STARTER
BULKING
MATERIAL
CONSUMABLES
1x SPRAY BOTTLE

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URINE DIVERSION
OPTIONAL FOR URINE DIVERSION
1X ZERO DISCHARGE UNIT
1x PVC DRAIN
PIPE 50MM
1x TRENCH ARCH
DRAIN WITH END
CAPS & GEOCLOTH
Screwdriver
(Philips/plain)
Jigsaw Tape Measure
Caulking gun
Marker
Spade
Ladder
Spirit Level
TOOLS REQUIRED
Scissors/Knife Drill PPE

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MATERIALS REQUIRED
• Water to wet starter material.
• Additional 50mm PVC pipe (coupling and bends if absorption trench is to be located some
distance away from tank). Additional pipe bends if needed for vent pipe.
• In poor soil conditions, extra length of trenching arch or agi drain may be required.
• Drainage gravel for excess uids drain.
INSTALLATION SUMMARY
1. Ensure the tank is in a position so that the toilet chute will be perfectly straight over the
tank below.
2. Ensure the tank foundation is solid with a concrete, sand or crusher dust bed.
3. Mark and cut holes in the oor for the toilet chute.
4. Mark and cut holes in the tank top.
5. Insert toilet chute and pedestal.
6. Install the vent system.
7. Install the liquid end-product drain pipe and absorption/transpiration trench.
8. Connect fan to power source.
9. Check everything is sealed.
10. Place a starter-bed of suitable bulking agent (e.g. wood shavings) in the unit.
11. Wet bulking agent before use of toilet.
12. Add starter bacteria after 14 days of use.
CONDITIONS
Any decomposition process works better where temperatures are warmer. Over the winter
months the composting process slows or can even temporarily stop where temperatures in the
pile drop below 4°C.
>13°C
Ideal temperature for composting
<13°C
Composting process slows

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Smooth Ground Uneven Ground
50-75mm bed of sand,
crusher dust or similar
solid sub-soil
POSITIONING THE TANK
If there is very little room between the top of the tank and the oor of the building, the order
of the installation can be changed as follows: Firstly, cut the hole for the pedestal in the oor
of the building (refer to page 9, Toilet Chute & Pedestal). Position the tank under the hole
and then mark the position of the hole onto the tank. After the tank has been marked, it can
be removed from under the building. Cut the hole in the tank and t the chute collar before
placing the tank back into position.
Check the position planned for the toilet chute. The toilet chute must be positioned over
the top of the compost tank. For less maintenance of the compost pile, the optimum
location for the chute/s to enter the tank is mid-width, in the rear half of the tank. A
clearance of at least 150mm from edge of chute to edge of tank-top is desirable to avoid
rapid build up of the pile against the sides.
Check there are no major support beams, pipes or electrical wire that are in the way of the
toilet chute.
Where mains power is to be used, check that a power point has been installed near the
location for the ventilation fan.
Locate where the excess liquid drainpipe and tench is to go and take this into account
when positioning the tank.
TANK SUPPORT
The composting tank must be supported by either packed earth with the tank placed on a
base of sand, or a wooden frame on a solid base (e.g. a concrete slab). Insulation between the
tank and the concrete slab will reduce heat loss and aid the composting process.
NOTE: The tank and enclosure should be protected from surface and oodwater.

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EXCESS LIQUID DRAIN INSTALLATION
Straight Pipe
Trench Arch
45° Bend
Straight Pipe
45° Bend
150 min
500 min
230 min
SECTION VIEW
Underground Trench
Arch Drain
Trench Arch
Drain
Gravel
OPTIONAL ZERO DISCHARGE
INSTALLATION
Refer to separate instructions provided.

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TOILET CHUTE & PEDESTAL
Please refer to the separate
pedestal installation manual for
instructions on how to locate the
pedestal in your bathroom.
FRONT
BACK
A3 Template to
cut chute hole at
the correct size.
BACK WALL
< 5mm of sideways play around the hole.
SIDE WALL
Note: If the oor of the building is high above
the top of the tank a chute extension piece/s
may be needed. Extra lengths are available from
your supplier. Joints should be screwed with
short self-tapper screws, and sealed with silicon.
If more than 2 chutes are joined then additional
support straps or brackets are needed to support
their weight from the building frame, instead of
hanging only by the top chute.
Using the outside of the toilet
chute as a template, mark and
cut the chute hole into the top
of the tank.
BATHROOM FLOOR
1
2
3

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Viewpoint/
Maintenance Access
Enlarge the hole in the
rubber chute collar so it will
stretch snugly around the
toilet chute without gaps.
Drip Edge
Max 100mm
SECTION VIEW
Mark and cut
chute.
4
5
6

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SEALANT
12
3
Collar
Lift the toilet chute slightly
and put sealant between
the toilet chute and the
oor then press chute
down again to seat rmly
onto the oor.
SEALANT
TOP FLOOR
Bend and move the
metal edging strip of the
chute collar to the tank.
Lift up Push down
7
8
Run a bead of silicon sealant
around the underside edge of
the collar.
Using the 1/2 stainless screw
provided, secured the collar of the
tank top by screwing through the
metal edging strip.
9

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PEDESTAL INSTALLATION
See separate instruction manual for pedestal installation.
INSTALLATION OF VENTILATION SYSTEM
Note: As air ow is essential to the operation of the unit, the fewer bends that are used
when installing the vent system the better.
NOTE: The hole for the vent pipe is best at the side
of the tank or along the top edge, as far as practical
from the nearest chute entry. Refrain from placing
it along the front face as this can hinder opening of
maintenance access door.
Plan the vent
pipe layout.
Cut hole 121mm in
diameter (as noted
on the wallace seal).
1
2

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Secure Wallace seal
into position.
Tip: Putting the wallace
seal in hot water for 5
minutes can help when
installing the PVC pipe.
Secure pipe ttings
according to building/
roong instructions.
Complexity may vary.
Mount the fan housing
onto the vent pipe.
Position the fan
housing so that it can
be easily accessed and
secure with silicon.
NOTE: The fan should
run 24 hours a day to
continuously circulate
air through the
compost heap and
minimise odour.
3
4
5

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Attach the upper
section of the vent
pipe. The pipe
should be supported
against the wall of
the building with the
brackets provided (2,
3). This conguration
will vary depending on
location of CM14.
Install the vent cowl or
optional turbo vent. Secure
with 3 self-tapping screws.
6
7
1
2
3
900mm
(min.)

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STARTER-BED OF ORGANIC MATTER
SUITABLE BULKING MATERIAL
Fine sawdustLarge wood chips
Wood shavings
Lawn clippings
Starter bed of bulking material to
underside of bafe.
1
2
BULKING
MATERIAL
0.50m³
Hemp
Sugar cane mulch
NOT SUITABLE BULKING MATERIAL
Dry Leaves Peanut or
coconut husk
Dampen down
well with water.
INSTALLATION COMPLETE