Dometic MF7100 Master Flush Macerator Toilet User Guide

: June 1, 2024
: Dometic

SANITATION MASTERFLUSH

Dometic MF7100 Master Flush Macerator Toilet 0

MF7100, MF7200 series with Orbit base

Macerator Toilet

Quick start guide

Form No. 4445104401 600347106 2024-02-12

1.1 General safety messages

WARNING: Flooding hazard. Failure to obey the following warnings could result in death or serious injury.

If the toilet is connected to any through the-hull fittings, always close the seacocks when the toilet is not in use (even if boat is unattended for a brief period). All passengers must be instructed on how to close the valves when the toilet is not in use.
If the toilet uses fresh water for flushing and is connected directly or indirectly to a shoreside municipal water system at any time, shoreside water connections must be disconnected if the boat is unattended (even if the boat is unattended for a brief period).
Before beginning any work on this product, be sure that all electrical power to the unit has been turned off and that the seacocks are in the closed or off position.

NOTICE: Overfilling the holding tank can cause serious damage to the sanitation system, such as rupturing the holding tank and releasing tank contents into the bilge. To prevent this possibility, Dometic recommends using a full tank shut-down relay. The full signal from the holding tank can be generated by an optional Dometic DTM01C tank monitor or DTM04 fourlevel tank monitor system.

Follow all local regulations for waste tank discharge.

2 Intended use

The Macerator toilet (hereinafter referred to as toilet or product) provides an electric-flush toilet that macerates waste and pumps it either to a holding tank or other effluent storage/ disposal system, or overboard. Operated by a remote flush switch, the toilet allows the user to add water to the bowl (before or after flushing) and to flush the toilet by pushing a button. This toilet is designed for use in marine applications and is only suitable for the intended purpose and application in accordance with these instructions.

This manual provides information that is necessary for proper operation of the toilet. Poor installation and/or improper operating or maintenance will result in unsatisfactory performance and a possible failure. The manufacturer accepts no liability for any injury or damage to the product resulting from:

Incorrect assembly or connection, including excess voltage
Incorrect maintenance or use of spare parts other than original spare parts provided by the manufacturer
Alterations to the product without express permission from the manufacturer
Use for purposes other than those described in this manual

Dometic reserves the right to change product appearance and product specifications.

3 Operation

NOTICE: Failure to obey the following may cause clogging or damage to the toilet, toilet components, or toilet system.

Do not operate the toilet without the water supply turned on.
Do not flush foreign objects. Flush only water, bodily wastes, and rapid-dissolving toilet tissue.
Do not flush wet wipes, sanitary napkins, condoms, diapers, paper cups, cotton swabs, food, hair, or liquids such as oils or solvents.

Make sure all guests understand toilet operation before use.

Toilet tissue paper
To avoid potential clogging problems with some household toilet tissues, Dometic recommends using quick-dissolving tissue, such as Dometic rapid dissolving 1-ply or 2-ply toilet tissue.

Not every marine-grade toilet tissue paper dissolves rapidly.

To determine any toilet tissue’s ability to dissolve, immerse one square of the tissue in a jar of water and shake 5-10 times. The tissue sample should break up so that it is no longer in one piece.

3.1 Freshwater flush (7120, 7220)

[1] DFS-2F Switch

(1) Add Water switch
(2) Flush switch

Toilet system start-up

Turn on the fresh water supply to the toilet.
Press the Flush switch and hold for at least 10 seconds.
Toss several sheets of toilet paper into the bowl and repeat the cycle. The bowl should completely clear.

Normal flushing
Adding water to toilet bowl

Press the Add Water switch until the desired water level is achieved.
More water is usually added only when flushing solids.

Do not press the Add Water switch too long or overflow may occur.

Flushing toilet
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.

The switch activates a macerator pump that siphons water and waste from the bowl, macerates, and propels the effluent to the discharge line/holding tank.

3.2 Sea water flush (7160, 7260)

[2] Flush Switch

(1) Flush switch

Toilet system start-up

Open the sea water inlet and the toilet discharge outlet seacocks.
Press the Flush switch and hold for at least 10 seconds.
Toss several sheets of toilet paper into the bowl and repeat the cycle. The bowl should completely clear.

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.

3.3 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).

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.
Flush the toilet at least five times.
Turn off the water supply to the toilet.
Flush the toilet without water very briefly to evacuate all water. This procedure will minimize any remaining water in the macerator pump.
Turn of the power to the toilet.
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.

4 Troubleshooting

Problem	Possible cause	Recommended solution

The flush function works, but the water in the bowl empties slowly or not at all.| The discharge piping is pinched or kinked.| Check the discharge piping.
The discharge piping is too high. All upward vertical loops should not exceed a total of 4 ft (1.2 m) in height.| Reroute the discharge piping.
The macerator pump or discharge piping is blocked.| Close the seacocks and clear any blockage.
The macerator pump makes unusually loud noises or continually trips the circuit breaker.| There is foreign material in the pump chamber. | Close the seacocks and clear any foreign material.
The flush cycle is not activated after pushing the Flush switch. | The holding tank is full and the signal from the tank has shut down the electrical power to toilet.| Empty the holding tank.
The electrical power to toilet is shut off or disrupted.| Check the wiring and circuit breakers (or fuses).
The Flush switch is malfunctioning. | Replace the Flush switch.
The electric motor is malfunctioning.| Replace the electric motor.
Insufficient or no water enters the bowl. | The water supply line is pinched or kinked.| Check the water supply line.
The screen in water valve is blocked. | Clear the blockage at the water valve.
The intake water filters are blocked (in raw water system).| Clear the water filters.
The water valve is malfunctioning.| Replace the water valve.
The water impeller is malfunctioning (raw water flush toilet).| Replace the raw water impeller.

5 Disposal

Place the packaging material in the appropriate recycling waste bins, whenever possible. Consult a local recycling center or specialist dealer for details about how to dispose of the product in accordance with all applicable national and local regulations.

6 Warranty information

Refer to the sections below for information about warranty and warranty support in the US, Canada, and all other regions.

6.1 United States and Canada

LIMITED WARRANTY AVAILABLE AT DOMETIC.COM/EN-US/TERMS-AND- CONDITIONSCONSUMER/WARRANTY.

IF YOU HAVE QUESTIONS, OR TO OBTAIN A COPY OF THE LIMITED WARRANTY FREE OF CHARGE, CONTACT:

DOMETIC CORPORATION
SANITATION CUSTOMER SUPPORT CENTER
13128 STATE ROUTE 226
BIG PRAIRIE, OHIO, USA 44611
1-800-321-9886

6.2 Asia-Pacific (APAC) countries

If the product does not work as it should, please contact your retailer or the manufacturer’s branch in your country (see the back of this instruction manual for the web addresses to locate your region or retailer). The warranty applicable to your product is ONE year.

For repair and warranty processing, please include the following documents when you send in the device:

A copy of the receipt with purchasing date
A reason for the claim or description of the fault

6.2.1 Australia only

Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and for compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.

6.2.2 New Zealand only

This warranty policy is subject to the conditions and guarantees which are mandatory as implied by the Consumer Guarantees Act 1993(NZ).

6.2.3 All other regions

The statutory warranty period applies. If the product is defective, please contact the manufacturer’s branch in your region or your retailer (see the back of this instruction manual for the web addresses to locate your region or retailer).

For repair and warranty processing, please include the following documents when you send in the device:

A copy of the receipt with purchasing date
A reason for the claim or description of the fault

Note that self-repair or nonprofessional repair can have safety consequences and might void the warranty.

Copyright

© 2024 Dometic Group. The visual appearance of the contents of this manual is protected by copyright and design law. The underlying technical design and the products contained herein may be protected by design, patent or be patent pending. The trademarks mentioned in this manual belong to Dometic Sweden AB. All rights are reserved.

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A complete list of Dometic companies, which comprise the Dometic Group, can be found in the public filings of: DOMETIC GROUP AB Hemvärnsgatan 15 SE-17154 Solna Sweden

4445104401 600347106 2024-02-12