go green pay less no mess
11. INSTALLATION OF VENTILATION SYSTEM.
Note: As air flow is essential to the operation of the unit, the fewer bends that are used
when installing the vent system the better.
The following instructions relate to use of the vent pipe sections available from Clivus
Multrum in the optional Vent & Drain Kit. If this kit is not used, installer must provide
a length of 150mm pipe to suit. We recommend PVC pipe, grade DWV for its strength
and long life.
1. Plan the vent pipe layout.
• The hole for the vent pipe should preferably be at the side of the tank towards
the front of the unit near the inspection door, as far as practical from the
nearest chute entry. This is so fresh air is drawn up the back vent and over the
fresh material before it is drawn up the vent pipe.
• The vent pipe may enter the tank vertically through the top, or horizontally
through the side wall near the tank top.
• To avoid woodshavings buildup, fan location is better the higher it is
positioned, though it still needs to be accessible so a good place to put the fan
housing is at the top end ot the first length of pipe. The wiring junction box
should be protected from the weather.
• The vent pipe should project approximately 1000mm above roof line.
2. Mark and cut a 160 mm hole in the appropriate position of the compost bin
using the pipe as a template.
3. Mark and cut the vent collar skirt so that it fits neatly around the vent-pipe and
slide it onto the bottom pipe section.
4. Insert vent pipe 50mm into the tank and support in position.
5. Check that the arrow on the fan housing is pointing up the vent pipe and not
back towards the compost bin, now mount the fan housing onto the vent pipe. Note
the two screws that hold the cover of the fan housing on. Twist the fan housing
around so a screw driver can reach the screws should the fan need to be checked or
changed over.
6. Connect upper sections of vent pipe. There is no need to glue joints, however
you may do so if desired. The vent pipe should be supported against the wall of the
building with the brackets provided, (or suitable alternatives) to carry the weight of the
complete vent system. The tank must not carry any weight from the vent systems.
7. It may be necessary to cut through the roof or eaves of the house. Before
cutting through the roof use a spirit level to ensure that the vent pipe is vertical. A
vertical vent pipe is not necessary for the operation of the system but aesthetically it
looks much better.
8. Once the vent pipe is in place, cut the roof flashing to size, slip it over the
exterior vent pipe and seal to roof sheeting with sealant and self-tapping screws or
rivets. A tile roof may require an alternative type of flashing to suit.
9. Install the ‘china hat’ rain cap or optional turbo vent with 3 self-tapping screws
on to the top of the vent pipe. (A turbo vent is usually only required when the fan is
run off Daylight Solar, or with a ‘passive’ ventilation system).
10. Now seal the vent collar to the tank with the supplied SS screws (10g x 1/2”)
and sealant, once the vent pipe is secured in final position.
11. Run some small beads of silicone around the joints on the vent pipe and
especially around the join of the fan housing.
PAGE 13
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