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Test procedure before normal operation
Dometic 4410N Commode
Test procedure before normal operation
1. Water line integrity:
a . Check for water leaks at all connections from ship’s piping to water valve,
and water valve to commode bowl inlet . If a visual check is not possible,
check all fittings with dry hands or a tissue paper .
b . Confirm no water is entering bowl through rim without Add Water or Flush
functions being activated through switch .
2. Check basic operation:
a . Push “Add Water” side of rocker switch (
1
at top) for about 5 seconds, and confirm water
enters bowl . Release switch and water should
enter for only a few seconds after flush switch is
released .
b . Push “Flush” side of switch (
2
at bottom) for 2
seconds . The following stages of the flush cycle
should occur automatically:
i . water valve actuates (opens),
ii . water enters bowl,
iii . white flush ball opens quickly,
iv . white flush ball slowly closes,
v . water valve actuates (closes),
vi . water will enter the bowl for a few more seconds, then stop .
c . Repeat steps 3a and 3b five times .
3. Check for proper flush ball seal operation:
a . With some water in the bowl, disconnect power to commode by pulling
J1
connector (see photo, p .2) at bottom left of Control Module .
b . With a colored marker, mark the edge of the water line in the bowl .
c . 4 hours later, the waterline should not have moved noticeably lower .
Maintenance
The only regular maintenance required is to ensure the flush ball seal is sealing
properly . The normal function of this seal both 1) allows the bowl to retain water,
and 2) keeps odors from the drain pipe from coming up past the seal .
Over time, the buildup of deposits on the flush ball rubber seal can cause water
to slowly leak past the seal and drain the bowl between uses of the commode .
In most cases the seal can be cleaned – or if necessary, replaced – to address
this . Please refer to
Troubleshooting
section for more information .
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