MF-DFS - Toilets DOMETIC - Free user manual and instructions

Product Type	Electronic flush switch for toilets
Compatible Toilet Models	8000 and 9000 series (DFS, DFP, DFSHW); also 4000 series via internal switches
Dimensions (DFS, DFP, DFSHW)	Width: 3", Height: 3.4"
Weight	Approx. 0.5 lb (230 g)
Power Supply	From toilet electrical system (12V DC)
Cable Length	Ethernet cable included, length sufficient for typical installation
Flush Modes	Normal (adds water after flush) and Dry Bowl (no water added)
Water Usage per Flush (Normal Mode, 8000 Series)	0.85 gal (3.2 liters)
Water Usage per Flush (Dry Bowl Mode, 8000 Series)	0.45 gal (1.7 liters)
Motion Sensor Range (DFSHW models)	4" (10 cm)
Backlight Modes	Always ON (full brightness), Always ON (dim), Energy saving (motion sensor), Always OFF
Operating Temperature	Indoor use only, temperature range typical for RV/boat
Installation Method	Wall-mount with bracket; requires 2" clearance behind wall
Certifications	Complies with NEC, CEC, RV codes
Warranty	Limited warranty; details at dometic.com/warranty
Country of Origin	USA (manufactured by Dometic Corporation)
Included Parts	Flush switch assembly, Ethernet cable, mounting screws
Required Tools	Phillips screwdriver, drill
Safety Features	Do Not Flush indicator when tank full; electrical shock hazard warnings
Maintenance	Clean with mild soap; avoid harsh chemicals; service mode for cleaning seals
Disposal	Recycle packaging; dispose per local regulations

Frequently Asked Questions - MF-DFS DOMETIC

How do I install the Dometic MF-DFS flush switch?

First disconnect electrical power. Use the appropriate wall template (provided or Dometic/Vima/Gewiss) to mark holes. Cut the square access hole, route the cable from wall to toilet base, leaving about 12” extra. Plug cable into switch panel, secure bracket, snap cover plate, and connect cable to toilet Ethernet port.

Which toilet models are compatible with the DFS flush switch?

The DFS, DFP, and DFSHW flush switches are designed for Dometic 8000 and 9000 series toilets. For older toilets (serial prefix ‘223” or lower), internal function switches must be set to lower position; DFSHW models require a new circuit board.

How do I operate the flush switch?

Press and hold the Add Water button for desired bowl water level. Press Flush to flush. For hand wave (DFSHW), hold hand in front of sensor to add water; wave to flush. The handwave can be toggled on/off by holding both buttons for 5 seconds.

What do the indicator lights mean on the DFS switch?

Steady green: power on; flashing green: flush mode changing; amber: holding tank 75% full; red: tank 100% full (flush disabled).

How do I change between normal and dry bowl flush modes?

Press and hold the Flush button for about 5 seconds until the OK TO FLUSH or POWER light begins flashing. Release to toggle between Normal (adds water after flush) and Dry Bowl (no added water).

Can I use the motion sensor feature on DFSHW models?

Yes. The motion sensor has a 4” (10 cm) range. Hold your hand in front for 3 seconds to start bowl fill; wave to flush. To enable/disable handwave, hold both left and right buttons for 5 seconds until backlight fades.

How do I adjust backlight brightness?

Press the Add Water button twice quickly to cycle through modes: Always ON full brightness, Always ON dim (DFSHW only), Energy saving (motion-activated, DFSHW only), and Always OFF.

What should I do if the toilet does not flush?

Check that power is on (green light steady). If red light is on, the holding tank is full - empty it. If green light is flashing, the system is changing flush mode. For older toilets, verify internal switches are set correctly.

How do I clean the flush switch or perform service?

Use the Service button: press and hold for 3 seconds to enter service mode (backlight flashes). Clean seals or bowl without water flow. Press and hold Service again to exit. Use mild soap; avoid abrasive cleaners.

Where can I get technical support or warranty service?

Call Dometic Customer Service at 1-800-321-9886 (U.S./Canada) or 330-439-5550 (International), Monday-Friday 8am-5pm ET. Warranty details at dometic.com/warranty.

USER MANUAL MF-DFS DOMETIC

VFS, VFP, VF SHW, DFS, DFP, DF SHW

EN

Electronic Flush Switches

Installation and Operation Manual

NORTH AMERICAN ADDRESS INFORMATION

U.S.A. & CANADA

Service Office

Dometic Corporation

13128 St. Rte. 226

Big Prairie, OH 44611

Service Center & Dealer Locations

Refer to "10 Customer Service" on page 13.

Form No. 600347477_A 01/19 | ©2019 Dometic Corporation

Read these instructions carefully. These instructions MUST stay with this product.

CONTENTS

1 Explanation of symbols and safety instructions. 3
2 General information....4
3 Intended use 4
4 Specifications.... 5
5 Prepare for installation....6
6 Installation 7
7 Operation....8
8 Wall Templates....12
9 Disposal 13
10 Customer Service....13
11 Limited warranty....13

1 EXPLANATION OF SYMBOLS AND SAFETY INSTRUCTIONS

This manual has safety information and instructions to help you eliminate or reduce the risk of accidents and injuries.

1.1 Recognize safety information

This is the safety alert symbol. It is used to alert you to potential physical injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.

1.2 Understand signal words

A signal word will identify safety messages and property damage messages, and will indicate the degree or level of hazard seriousness.

⚠ WARNING indicates a hazardous situation that, if not avoided, could result in death or serious injury.

⚠️ CAUTION indicates a hazardous situation that, if not avoided, could result in minor or moderate injury.

NOTICE

is used to address practices not related to physical injury.

indicates additional information that is not related to physical injury.

1.3 Supplemental directives

Read and follow all safety information and instructions to avoid possible injury or death. Read and understand these instructions before installation or use of this product. Incorrect installation or operation of this product can lead to serious injury.

The installation must comply with all applicable local or national codes, including the latest edition of the following standards:

U.S.A.

• ANSI/NFPA70, National Electrical Code (NEC)
• ANSI/NFPA 1192, Recreational Vehicles Code
• ABYC guidelines for marine installations

Canada

• CSA C22.1, Parts I & II, Canadian Electrical Code
• CSA Z240 RV Series, Recreational Vehicles

1.4 General safety messages

WARNING

Failure to obey the following warnings could result in death or serious injury:

• This product must be installed and serviced by a qualified service technician.
• Do not modify this product in any way. Modifi cation can be extremely hazardous.

NOTICE

RISK OF PROPERTY DAMAGE. Failure to obey the following notices may caus

damage to the toilet or toilet system.

• Only flush water, bodily wastes, and rapid-dissolving toilet tissue.
• Do not overfill the holding tank, or serious damage can occur to the sanitation system. Overfilling the holding tank can rupture the holding tank or release tank contents into the bilge.

2 GENERAL INFORMATION

Included Parts Quantity

Flush switch assembly 1

Ethernet cable 1

Mounting screws 4

Recommended Tools

Phillips Screwdriver Drill

3 INTENDED USE

This flush switch is designed and intended for use only inside a boat or recreational vehicle (hereinafter referred to as "RV") for which it is supplied. Use the instructions to ensure correct installation and operation of the flush switch. Dometic accepts no liability for damage in the following cases:

• Faulty assembly or connection.
• Damage to the product resulting from mechanical influences and excess voltage.
  • Alterations to the product without expressed permission from the Dometic Corporation.
• Use for purposes other than those described in the operating manual.

Dometic Corporation reserves the right to modify appearances and specifications without notice.

4 SPECIFICATIONS

4.1 Dimensions

VFS, VFP

DFS, DFP

VFSHW

DFSHW

Dimension	VFS, VFP, and VFSHW	DFS, DFP, and DFSHW
A 3" 3"
B 3.4" 3.4"

4.2 Compatible models

Flush Switch Toilet Model(s)

VFS, VFP, and VFSHW 4000 series

DFS, DFP, and DFSHW 8000 and 9000 series

5 PREPARE FOR INSTALLATION

WARNING ELECTRIC SHOCK HAZARD. Disconnect electrical power before installing this product. Failure to obey this warning could result in death or serious injury.

5.1 Preparing the flush switch for use with older toilets

VFS, VFP, DFS, and DFP flush switches have internal function switches that allow them to be used with older toilets. Use the following procedure to prepare the flush switch for use with a toilet that has a serial number containing the prefix "223" or lower.

Remove the back cover from the switch panel using a small, flat head screw driver and locate the internal function switches.

▶Push both switches to the lower position.

This setting disables the backlighting of the Service button on VFS and VFP flush switches, since the Service button does not operate on older VacuFlush toilets.

▶Reassemble the panel and proceed to installation.

VFSHW and DFSHW flush switches are not compatible with toilets that have a serial number containing the prefix "223" or lower. In order to use VFSHW or DFSHW flush switches with an older toilet, a new circuit board must be installed.

5.2 Planning the electrical connections

If replacing a previous electronic flush switch, disconnect the wiring from the old switch before installing the new switch.
Plan the flush switch location so the cable can reach the toilet circuit board. Ensure that the cable will not get wet.

6 INSTALLATION

6.1 Installing the flush switches

There must be at least 2" of clearance behind the wall surface.

▶Use the appropriate Dometic, Vima ^® , or Gewiss ^® template to mark the center access and fastener holes.
▶Cut out the square access hole.

▶Route the flush switch cable from the wall access hole to the floor access hole at the toilet base. Leave about 12" of extra cable at the toilet.
▶Plug the cable into the back of the flush switch panel.

▶ Secure the flush switch bracket to the wall using the screws provided.
▶Snap the cover plate onto the bracket.
▶Connect the flush switch cable to the Ethernet port on the toilet switch board.

7 OPERATION

7.1 Operating VFS, VFP, and VFSHW (4000 Series)

Toilet system startup

▶Turn ON electrical power and water supply to the toilet.

Flush the toilet five times by pressing the Flush button or waving a hand over the motion sensor (VFSHW only). Allow each flush cycle to complete until the OK TO FLUSH light indicates the system is ready for the next flush. This ensures that flush water is present throughout the entire vacuum system.

Normal toilet operation (VFS, VFP, and VFSHW)

▶ Press and hold the Add Water button until the desired water level is achieved in the bowl.
▶ Press the Flush button to flush the toilet. Do not attempt to flush the toilet when the red DO NOT FLUSH light is ON.
▶ Press the Add Water button twice quickly to toggle through backlight modes:

• Always ON (full brightness, default)
• Always ON (dim) (VFSHW only)
• Energy saving (ON when motion is sensed) (VFSHW only)
• Always OFF

Using the hand wave feature (VFSHW only)

The motion sensor range is 4" (10 cm).

▶Hold your hand in front of the Motion Sensor to fill the bowl with water. Water will start to flow after three seconds. Continue to hold your hand in front of the motion sensor until the desired water level is achieved.

Wave your hand in front of the Motion Sensor to flush the toilet. Do not attempt to flush the toilet when the red DO NOT FLUSH light is ON.

The handwave function can be toggled on/off by holding in BOTH the left and right buttons for 5 seconds. A backlighting fade sequence will follow indicating the handwave operation has been toggled:

• Backlight fade-to-on indicates handwave has been toggled to 'enabled'.
• Backlight fade-to-off indicates handwave has been toggled to 'disabled'.

Understanding the indicator lights

Indicator Light Status

OK TO FLUSH Steady green The toilet is ready to flush

Flashing green The flush mode is changing

DO NOT FLUSH Red The holding tank is full*

The toilet system is recharging the vacuum

*Flush actuation is disabled to prevent overfilling the holding tank

Service mode

To clean the toilet bowl or seals, or to perform other servicing that requires keeping the flush ball open without running water, use the Service button.

▶ Push and hold the Service button for three seconds. The backlight will change to a steady flash while the toilet is in service mode.
▶Perform the required servicing.
After servicing is complete, push and hold the Service button for three seconds to change back to normal operation.

7.2 Operating the DFS, DFP, DFSHW switches (8000 and 9000 Series)

Toilet system startup

▶Turn ON electrical power and water supply to the toilet.

Flush the toilet by pressing the Flush button or waving a hand over the motion sensor (DFSHW only). Allow the flush cycle to complete.
▶ Toss several sheets of toilet tissue into the bowl and flush the toilet again. The bowl should be completely clear.
9000 Series: If the bowl is not completely clear after flushing, adjust the rim and jet water flow timing on the toilet control module to a higher setting. Repeat the flush test after each adjustment.

Normal toilet operation (DFS, DFP, and DFSHW)

▶ Press and hold the Add Water button until the desired water level is achieved in the bowl.
▶ Press the Flush button to flush the toilet.
▶ Press the Add Water button twice quickly to toggle through backlight modes:

• Always ON (full brightness, default)
• Always ON (dim) (DFSHW only)
• Energy saving (ON when motion is sensed) (DFSHW only)
• Always OFF

Using the hand wave feature (DFSHW)

The motion sensor range is 4" (10 cm).

▶Hold your hand in front of the Motion Sensor to fill the bowl with water. Water will start to flow after three seconds. Continue to hold your hand in front of the motion sensor until the desired water level is achieved.
Wave your hand in front of the Motion Sensor to flush the toilet.
The handwave function can be toggled on/off by holding in BOTH the left and right buttons for 5 seconds. A backlighting fade sequence will follow indicating the handwave operation has been toggled:

• Backlight fade-to-on indicates handwave has been toggled to 'enabled'.
• Backlight fade-to-off indicates handwave has been toggled to 'disabled'.

Understanding the indicator lights

Indicator Light Status

Power on Steady green Electrical power to the toilet is

activated

Flashing green Flush mode is changing

Tank level Amber The holding tank is 75% full

Red The holding tank is 100% full*

*Flush actuation is disabled to prevent overfilling the holding tank

7.3 Changing flush modes (4000 and 8000 Series)

▶ Press and hold the Flush button for approximately five seconds to toggle between normal and dry bowl mode.
Release the Flush button when the OK TO FLUSH or POWER light begins flashing.

Flush modes Action		Water used per flush (4000 Series)	Water used per flush (8000 Series)
Normal Adds water to the bowl after every flush		1 quart (0.95 liters)	0.85 gal. (3.2 liters)
Dry bowl	Does not add water to the bowl after every flush	1 pint (0.5 liters)	.45 gal (1.7 liters)

8 WALL TEMPLATES

8.1 VFSHW, VFS, DFSHW, and DFS Wall Bracket

8.2 VFP and DFP Wall Bracket

9 DISPOSAL

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

10 CUSTOMER SERVICE

For the Authorized Service Center near you, call between 8:00 a.m. and 5:00 p.m. (ET), Monday through Friday, or contact the nearest Parts Distributor.

Telephone: [phone] U.S.A. and Canada

330-439-5550 International

Fax: [phone] U.S.A. and Canada

330-439-5567 International

Website: www.dometic.com

11 LIMITED WARRANTY

LIMITED WARRANTY AVAILABLE AT: dometic.com/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

[phone]