Dometic DTM04, DTM12, DTM08 Installation And Operational Manual

TANK MONITOR SYSTEMS

DTM04 TANK MONITOR
DTM08 TANK MONITOR
DTM12 TANK MONITOR

INSTALLATION AND OPERATION MANUAL

1

TANK MONITOR SYSTEMS

ENGLISH

Safety Instructions 2

Features 2 - 3

Specications 3

Installation 4 - 5

Wiring Diagrams 6 - 7

Warranty 8

FEATURES

SAFETY INSTRUCTIONS

WARNING: When using this device, always exercise
basic safety precautions, including the following:

• Read all instructions before installation or use.

• Never connect this device to any electrical circuit
with other than 12 or 24 volt Direct Current or
exceed the amperage draw listed below.

• Never install the indicator panel in an atmosphere
with potentially ammable or explosive vapors.

• Never install the probe cap with oat switches
into a tank that contains anything other than
fresh, gray or black water.

CAUTION: Dropping or rough handling of oat
switches may result in damage.

Probe

Cap

Adjustable

DTM04 DTM08 DTM12

Tank Monitor Systems

Dometic Tank Monitor Systems permit remote sensing of liquid
levels in black or gray waste water, or potable freshwater tanks.
Three oat switches, which activate a set of four lights, are installed
in the desired tank. One oat activates a “Full” light when the liquid
is within 2 inches (51 mm) of the top inside surface of the tank. The
other oat switches are mounted on adjustable stems and can be
positioned to within 2 inches of the tank bottom. The stems are
semi-exible and ex with the sloshing of the tank contents. One
oat can be positioned to sense when the tank is empty and the
others to sense when the tank is 1/4 or 1/2 full, depending on the
application.

Tank Monitor Application Chart

DTM04 DTM08 DTM12

Blackwater waste

Freshwater supply

Graywater waste

Stems

Float Switches

2

FEATURES (continued)

• Four lighted level indicators for each tank application. One light is always “on” to indicate system power.

• Flexible probe design eliminates false readings from fouled oat switches.

• Available probe lengths t tanks up to 22 inches (559 mm) or 45 inches (1143 mm) in depth.

• Panel complements bathroom decor. International symbology eliminates confusion.

• Installs in any rigid tank with optional 3-inch NPT mounting ange.

• Each system operates on either 12 or 24 VDC.

• Probe cap provides clean-out tting for easy access to tank interior.

• Vent hose connection in probe cap (if applicable) permits connection of 5/8-inch (16 mm) vent hose.

• Optional shut-down relay plugs into circuit board to shut down toilet system when gray or black water waste
tank is full (DTM04 model only).

• Only one level light on at a time to eliminate confusion and save battery power.

• CE approved for electromagnetic compatibility.

SPECIFICATIONS

Electrical Current Draw

12 VD C DTM04 DTM08 DTM12

Without shut-down relay 0.008 A 0.016 A 0.024 A

With shut-down relay 0.14 5 A N/A N/A

24 VDC DTM04 DTM08 DTM12

Without shut-down relay 0.004 A 0.008 A 0.012 A

With shut-down relay 0.090 A N/A N/A

Dimensions

* Max length for 45-inch probes
is 43 3/4-in. (1111mm).

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TANK MONITOR SYSTEMS

INSTALLATION

Adjustable Tank Probe Cap

1. The tank probe cap is designed for a 3-inch FPT opening. Order part number 230272 if tank is made of rigid
material and is not a SeaLand holding tank.

2. Loosen compression nuts on adjustable probes and install the cap into the tank. Slide the #1 probe down
until the oat touches the bottom of the tank. Tighten #1 compression nut and mark the probe at the top of
the nut with a pen or pencil. Do not cut the probe’s tubing at this mark. Loosen the compression nut, slide
the probe up, and carefully cut the #1 probe’s tubing 1-5/8 inch (41.3mm) below the mark without damaging
the switch wires. Pull the wires through the black wire cover and push the probe down into the compression
nut until the black wire cover touches the compression nut.

3. Remove cap from tank and adjust the #2 probe for 1/2 full level for gray and black water tanks or 1/4 full level
for freshwater tanks. Tighten the compression nut and cut the probe’s tubing off 3/8-inch (9.5mm) above the
compression nut without damaging the switch wires. Slip the black wire cover onto the top of the stem.

4. To make the #1 oat switch activate the “Empty” light, the oat must be positioned with the recessed shoulder,
white band, or the letters “NO” at the bottom. Remove the C-clip from the switch body, ip the oat 180 degrees,
and replace the C-clip. (See Diagram #1.)

5. The #2 oat switch can activate the “Mid” light on black and gray water tanks and activate the “Low” light on
freshwater tanks. The recessed shoulder, white band, or the letters “NO” should be facing up for black and
gray water tanks and down for freshwater tanks. (See Diagram #2.)

6. Route 18-gauge stranded copper wire from the indicator panel to the level indicator cap. Use quick-discon­nect terminals on oat switch wires to prevent twisting wires when removing the cap. With cap removed from
the tank, connect the wires according to the wiring diagram and test the oats by moving them up and down.
Disconnect the wires and install the cap with the O-ring into the tank, then reconnect the wires.

7. For caps with vents, route 5/8-inch vent hose from the through-hull tting to the vent connection on the level
indicator cap. Use stainless steel hose clamps to secure the vent hose connection.

Monitor Panel

1. Select a mounting location away from direct contact with water and oil. Dry locations in the bathroom, salon or
galley are most desirable.

2. Conrm clearances for the panel and wire connections behind walls, hull liner or bulkhead.

3. Cut out mounting holes (see template for panel and
fastener hole locations.)

4. Do not mount the circuit panel until wiring is routed
and properly connected.

5. Route wires following the appropriate wiring diagram
for black, gray or fresh water applications.

6. Include wires for optional electrical accessories that
may be part of the installation and shown in separate
wiring diagrams.

7. Install the circuit panel with the four #6 fasteners
provided. Make sure to install with the “UP” arrow
pointing in the proper direction.

8. Push the panel cover onto the circuit panel until it
snaps into place.

4

INSTALLATION (continued)

Universal Tank Flange Kit (optional)

1. Find and mark the top center of the tank.

2. Cut a 4 1/16-inch diameter hole in the top center of
the tank.

3. Slip the ange into the hole and mark the location
of the ve mounting holes.

4. Drill the ve mounting holes with a 1/4-inch drill
bit.

5. Remove the ange, clean all oils, grease and dirt
from the mounting surface and allow to dry.

6. Apply liberal amounts of silicone rubber adhesive
to the mounting surface and the underside of the
ange.

7. Insert the gasket into the ange and align with the
ve mounting holes.

8. Secure the ange with the screws, nuts and washers
provided.

9. Install the probe cap and, if applicable, secure the
5/8-inch vent hose to the vent tting with a stainless
steel hose clamp.

Shut-down Relay (optional – applies to DTM04 only)

CAUTION: VERIFY THAT RELAY IS CORRECT VOLTAGE FOR SYSTEM (12VDC requires P/N 600341292 and
24VDC requires P/N 600342490).

1. Insert a small screwdriver behind the top or bottom slot of the panel cover and pry it outward. Remove panel
cover from circuit panel.

2. Remove the four mounting fasteners and pull the circuit panel out of the wall or hull liner, exposing the

wiring connections.

3. Insert the shut-down relay into the socket on the back of the circuit panel.

4. Reinstall the circuit panel to the wall.

5. Route the additional wires (use 12 or 14 gauge stranded copper) to wires 10 and 11 on pigtail to interrupt
power for the toilet system. (See shut-down relay wiring diagram for application details.)

6. Turn on power and test circuit.

7. Complete installation to wall.

Flange Kit Assembly

Tan k

surface

5

WIRING DIAGRAMS

DTM04 Tank Monitor System for Blackwater
Waste Tank

TANK MONITOR SYSTEMS

USE 18GA. OR LARGER STRANDED COPPER WIRE.

IF OPTIONAL “TANK FULL” SHUT-DOWN RELAY IS
INSTALLED, PINS 10 AND 11 REQUIRE 14GA. OR LARGER
STRANDED COPPER WIRE.

BLACKWATER TANK NOTE: RECESSED SHOULDER, THE
WHITE BAND, OR THE LETTERS "N-O" OF THE “EMPTY”
FLOAT ARE DOWNWARD.

DTM08 Tank Monitor System for
Blackwater and Freshwater Tanks

DTM04 TANK

MONITOR

USE 18GA. OR LARGER STRANDED COPPER WIRE.

BLACKWATER TANK NOTE: RECESSED SHOULDER, THE
WHITE BAND, OR THE LETTERS "N-O" OF THE “EMPTY” FLOAT
ARE DOWNWARD.

FRESHWATER TANK NOTE: RECESSED SHOULDER, THE
WHITE BAND, OR THE LETTERS "N-O" OF THE “EMPTY” AND
“MID” FLOAT ARE DOWNWARD.

DTM08 TANK

MONITOR

6

DTM12 Tank Monitor System for Blackwater and Graywater Tanks,
and Freshwater Tank

USE 18GA. OR LARGER STRANDED COPPER WIRE.

BLACKWATER AND GRAYWATER TANK NOTE: RECESSED
SHOULDER, THE WHITE BAND, OR THE LETTERS "N-O" OF THE
“EMPTY” FLOAT ARE DOWNWARD.

DTM12 TANK

MONITOR

FRESHWATER TANK NOTE: RECESSED SHOULDER, THE WHITE
BAND, OR THE LETTERS "N-O" OF THE “EMPTY” AND “MID”
FLOAT ARE DOWNWARD.

Shut-down Relay with DTM04 Tank Monitor System

USE 12 OR 14 GAUGE STRANDED COPPER WIRE ON PINS 10
AND 11.

WITH RELAY INSTALLED AND DTM04 MODEL WIRED FOR A
BLACKWATER TANK, THE “FULL” FLOAT SWITCH WILL SHUT
OFF ELECTRICAL POWER TO THE TOILET SYSTEM.

DTM04 TANK

MONITOR

with

shut-down relay

Consult toilet system specications for proper fusing or
circuit breaker size. Do not exceed 30 amps.

7

TANK MONITOR SYSTEMS

MANUFACTURER’S ONE-YEAR LIMITED WARRANTY

Dometic Corporation warrants, to the original purchaser only, that this product, if used for personal, family or household
purposes, is free from defects in material and workmanship for a period of one year from the date of purchase.

If this Dometic product is placed in commercial or business use, it will be warranted, to the original purchaser only,
to be free of defects in material and workmanship for a period of ninety (90) days from the date of purchase.

Dometic reserves the right to replace or repair any part of this product that proves, upon inspection by Dometic, to
be defective in material or workmanship. All labor and transportation costs or charges incidental to warranty service
are to be borne by the purchaser-user.

EXCLUSIONS

IN NO EVENT SHALL DOMETIC BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, FOR DAMAGES
RESULTING FROM IMPROPER INSTALLATION, OR FOR DAMAGES CAUSED BY NEGLECT, ABUSE, ALTERATION
OR USE OF UNAUTHORIZED COMPONENTS. ALL IMPLIED WARRANTIES, INCLUDING ANY IMPLIED WARRANTY
OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE, ARE LIMITED TO A PERIOD OF ONE
YEAR FROM DATE OF PURCHASE.

IMPLIED WARRANTIES

No person is authorized to change, add to, or create any warranty or obligation other than that set forth herein.

Implied warranties, including those of merchantability and tness for a particular purpose, are limited to one (1) year
from the date of purchase for products used for personal, family or household purposes, and ninety (90) days from
the date of purchase for products placed in commercial or business use.

OTHER RIGHTS

Some states do not allow limitations on the duration of an implied warranty and some states do not allow exclusions
or limitations regarding incidental or consequential damages; so, the above limitations may not apply to you. This
warranty gives you specic legal rights, and you may have other rights which vary from state to state.

To obtain warranty service, rst contact your local dealer from whom you purchased this product.

REVISION A

Form No. 600345620 6/17
©2017 Dometic Corporation

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Dometic Corporation, Sanitation Division

13128 State Rt. 226, P.O. Box 38

Big Prairie, OH 44611 USA

1-800-321-9886 • Fax: [phone]

www.Dometic.com

INSTALLATION TEMPLATE – MONITOR PANEL

Use this template with Dometic Monitor Panel installation instructions on page 4.

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