Maintenance And Winterizing - Dometic MASTERFLUSH MF7100 Operating Manual

Maintenance and winterizing

5.4.4 Normal flushing
Press the Flush switch down and hold until the
waste drains from the toilet bowl (about 10-20
seconds).
• To use less water for liquid-only flushes, press
the Flush switch for a shorter period of time.
• If the toilet bowl does not completely
flush and fills up with sea water during the
flush, partially close the inlet valve until the
bowl clears and completely discharges the
effluent. Then, with the inlet and discharge
valves completely open, flush the toilet for a
few seconds to clear the toilet and discharge
system.
The switch activates a macerator pump that
siphons water and waste from the bowl,
macerates, and propels the effluent to the
discharge line.
6 Maintenance and
winterizing
6.1 Cleaning the toilet
NOTICE: To avoid damaging the internal seals,
do not clean the toilet with abrasive cleaners,
caustic chemicals, lubricants, or cleaners that
contain alcohols or petroleum distillates.
To maintain the toilet's original lustrous
appearance, use Dometic Toilet Bowl Cleaner
or other non-abrasive bathroom and toilet bowl
cleaners. Follow the label directions.
6.2 Routine maintenance
6.2.1
Monthly
• Inspect the toilet, plumbing, and plumbing
connections, wires, and wire connections.
• Open and close all plumbing valves,
including the seacocks.
• Check the in-line water filters and vented
loops for blockage.
6.2.2
Yearly
Check the water valve filter for blockage or
damage.
8
6.3 During extended periods of
non-use
NOTICE: During the water evacuation process,
do not operate the sea water pump very long
without water. The pump impeller may become
damaged.
The macerator toilet and sanitation hoses should
be protected if the toilet will not be needed
for an extended period of time (more than two
weeks, especially in hot weather).
1. Flush the toilet and add 4 oz (118 ml)
of liquid biodegradable laundry
detergent (should not contain bleach or
environmentally harmful substances).
– If using sea water for flushing, shut off the
power to the sea water pump and add
fresh water directly into the bowl during
the flush cycle.
2. Flush the toilet at least five times.
3. Turn off the water supply to the toilet.
4. Flush the toilet without water very briefly
to evacuate all water. This procedure
will minimize any remaining water in the
macerator pump.
5. Turn of the power to the toilet.
6. After extended periods of non-use, the toilet
and pump may be dry. For an easier restart
of the toilet system, add 1 qt (0.9 L) of water
to the bowl and let it stand for a few minutes
before use.
6.4 Winterizing
NOTICE: Never use automotive-type
antifreeze in freshwater systems. Use nontoxic
antifreeze designated for potable water systems.
Refer to your boat or vehicle owner's manual.
At the end of each season, the macerator
toilet should be winterized for storage by
using potable water-safe antifreeze if the
boat or vehicle will be exposed to freezing
temperatures.
6.4.1 Pressurized fresh water system
Each installation is different, so the amounts of
antifreeze needed may vary. User discretion is
required to assure adequate protection.
1. Drain the potable water tank and empty the
holding tank.
2. Add potable water antifreeze to the potable
water tank.
Macerator Toilet
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