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Urine Odour in
Washroom
Occasional
Urine Odor
Outside
Strong
Sewage
Odor
Fan Noisy
Horizontal runs or
downward slopes on
vent pipe
Fan has failed
Downdraft
Competing appliances
(EXCEL NE)
1. Vent stack not
installed above
peak of roof.
2. If vent stack is
installed above
roof line, natural
obstructions, such
as tall trees, being
located in a valley
or close to a hill
may be causing
downdraft.
Compost is anaerobic
Fan damaged in ship-
ping or bearings are
beginning to wear.
Re-install the vent so there are no horizontal or low
points where condensation can collect.
Have your serial number ready and call SUN-MAR for
a replacement. Instructions are included with the
replacement fan.
If you believe that there may be a downdraft outside
of the building, it may be a good idea to remove
your fan assembly prior to installation and set the fan
gate to ‘0’ to prevent urine odor in the bathroom.
(electric)
Install a 12 volt fan in vent pipe. (EXCEL NE)
Wood stoves or furnaces installed in a tightly sealed
room with the composting toilet may draw air in
causing a vacuum in the room. This will draw air
down the vent pipe.
1. Check that the vent is installed above the peak
of the roof. If not, extend the vent. Guide wires
may be necessary.
2. Add lime to the evaporation chamber - as much
as you think necessary. You will have to rake
more often if you do this.
3. SUN-MAR has a filter box available which will
filter the ammonia out of the vented air in a
downdraft situation. Call SUN-MAR for details.
Begin following: “Compost Troubleshooting” sugges-
tions.
1. If it is rattling, it may need to be cleaned or the
bearings are worn and the fan needs to be
replaced.
2. A hum is the normal sound the fan will make.. If
you are in a very quiet setting it will be more
noticeable. If this is the case, consider
purchasing a fan speed control so that the fan
may be turned down.
Install wall brackets on vent pipe to
prevent settling. DO NOT install hori-
zontal runs as liquid will collect and
block ventilation, causing odor.
The fan is a constantly moving part
and has a finite service life.
Install an air intake to the competing
appliance from the outside.
Downdraft is dependent on wind
direction as well as natural obstruc-
tions etc.
Initially, install the vent above the
peak of the roof. If symptoms occur,
add lime or a filter box.
Follow “Ongoing Maintenance” and
use proper bulking material.
Clean the fan with a small brush
and/or compressed air nozzle once a
year. To do this, remove the fan
assembly by taking off the snap cap
covers and unscrewing the screws
which hold it in.
The entire assembly will then simply
slide out. This will prevent wear and
lengthen the life of your fan.
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