Dometic VFS User manual

SANITATION
FLUSH CONTROLS
VFS, VFP, VFSHW, DFS, DFP, DFSHW
EN Electronic Flush Switches
Installation and Operation Manual

2
EN
Flush Controls
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

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Flush Controls
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.
indicates a hazardous situation that, if not avoided, could result in death or
serious injury.
indicates a hazardous situation that, if not avoided, could result in minor or
moderate injury.
is used to address practices not related to physical injury.
Iindicates 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 l & ll, Canadian Electrical
Code
• CSA Z240 RV Series, Recreational
Vehicles
1.4 General safety messages
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. Modification can be extremely hazardous.
RISK OF PROPERTY DAMAGE. Failure to obey the following notices may cause
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.

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Flush Controls
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
(hereinaer 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.

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Flush Controls
4 SPECIFICATIONS
4.1 Dimensions
VFS, VFP
1
A
B
DFS, DFP
2
A
B
VFSHW
3
A
B
DFSHW
4
A
B
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

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Flush Controls
5 PREPARE FOR INSTALLATION
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
IVFS, 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.
5Flush Switch
Rear Cover
ON
1 2
CTS
ON
1 2
CTS
6
VFS, VFP
*Switch positions shown in factory setting
DFS, DFP
➤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.
IThis 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.
IVFSHW 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.

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Flush Controls
6 INSTALLATION
6.1 Installing the flush switches
IThere must be at least 2" of clearance behind the wall surface.
7
Wall Access
Hole
Wall Surface
2"
➤Use the appropriate Dometic, Vimar®,
or Gewiss® template to mark the center
access and fastener holes.
➤Cut out the square access hole.
8
Cable
Flush
Switch
➤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.
9
Bracket
Cover Plate
➤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.

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EN
Flush Controls
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.
10
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
11
Motion
Sensor
Using the hand wave feature (VFSHW
only)
IThe 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 aer 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 le
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’.

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Flush Controls
➤
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.
➤Aer servicing is complete, push and hold the Service button for three seconds to change
back to normal operation.

10
EN
Flush Controls
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 aer flushing, adjust the rim and jet water flow
timing on the toilet control module to a higher setting. Repeat the flush test aer each adjustment.
12
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
13
Motion
Sensor
Using the hand wave feature (DFSHW)
IThe 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 aer 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 le
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’.

11 EN
Flush Controls
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
aer every flush
1 quart (0.95 liters) 0.85 gal. (3.2 liters)
Dry bowl Does not add water to the
bowl aer every flush
1 pint (0.5 liters) .45 gal (1.7 liters)

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Flush Controls
8 WALL TEMPLATES
8.1 VFSHW, VFS, DFSHW, and DFS Wall Bracket
14
2" (51 mm)
2" (51 mm) clearance
required behind wall surface
1.875" (64 mm)
8.2 VFP and DFP Wall Bracket
15
2.25"
(51 mm)
2.5" (64 mm)
2" (51 mm) clearance
required behind wall surface

13 EN
Flush Controls
9 DISPOSAL
MPlace 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: 1 800‑321‑9886 U.S.A. and Canada
330‑439‑5550 International
Fax: 330‑496‑3097 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
+1 800‑321‑9886