Blue Sea VSM 422 User manual

Features
• Accurate—can be precisely calibrated for
each tank
• Reliable—no moving parts that can wear and
cause intermittent or complete signal loss
• Digital ltering—eliminates errors due to liquids
sloshing in mobile tanks
Specifications
Electrical Interface: Three Wires
Supply Voltage: 10–32 Volts DC
Maximum Depth (PN 1810): 32.00" (812.8mm)
Maximum Depth (PN 1811): 24.00" (609.6mm)
Distance Accuracy: +/– 0.125" (3.81mm)
Operating Temperature Range: ˉ40 to 85º C
Mounting: SAE 5 Bolt Pattern
SAE 5 Bolt Maximum Torque: 15 in-lbs (1.7 N•m)
Maximum Dead Band—top only 2.00" (50.8mm)
Regulatory
Ignition protected and tested to ABYC H-24 for fuel
system components
Marine Electrical Prod ucts
VSM 422 Ultrasonic Tank Sender
Blue Sea Systems Inc.
425 Sequoia Drive Bellingham, WA 98226 USA
Phone [phone] Fax [phone]
www.bluesea.com
980001390 Rev.000
Warning
PN 1810 / PN 1811
]If you are not knowledgeable about
electrical systems, have an electrical
professional install this unit. The diagrams
in these instructions pertain to the
installation of the VSM 422 Ultrasonic
Tank Senders and not to the overall wiring
of the vessel.
]Ensure that gasoline tanks are completely
empty and free of any vapors before
beginning installation.
]For safe installation, turn off battery switch
or remove the negative battery cable.
Alternatively remove branch circuit fuse
feeding the sender circuit.
Guarantee
Any Blue Sea Systems product with which a
customerisnotsatisedmaybereturnedfora
refund or replacement at any time.
A
B
1
112
3
1 2
C
2
2 3 4 5 6 7 8 9 10 11
Fuse
(5 Amp)
BATTERY
1
PINK WIRE
BLACK WIRE
PURPLE WIRE
Fuse
(5 Amp)
BACK OF
THE METER
PINK WIRE can be connected
to PIN 7, 8, or 3
PIN 7 - Tank 1
PIN 8 - Tank 2
PIN 3 - Tank 3
3 Wire VSM 422 Ultrasonic Sender
Installation Diagram
PN 1810 and PN 1811
Installation
Blue Sea Systems VSM 422 Ultrasonic Tank
Sender PN 1810 is used for water, waste, and
diesel fuel tanks. Blue Sea Systems VSM 422
Ultrasonic Tank Sender PN 1811 is used for
gasoline tanks.
When connecting the tank senders to ground, it is
important to connect them as directly as possible
to the main negative bus. Do not ground directly to
the fuel tank. This will prevent high loads such as
battery chargers from affecting the tank readings.
The Blue Sea Systems VSM 422 Ultrasonic Tank
Senders require an external power source. When
power to the sender is lost, the VSM 422 will read
the tank as full, and may trigger the tank’s high
level alarm.
NOTE: Thegasketisdesignedtotonlyone
way on the tank sender. Carefully note its
position and orientation with index hole aligned
with the electrical connections, and screw holes
precisely aligned with the mounting holes in the
sender.Iftheholesdonotexactlyalign,ip
the gasket over. Ensure that the gasket is fully
seated in the sender recess.
1. An existing SAE 5 bolt pattern mounting hole
may be used to mount the tank sender.
Ideally, the sender should be located at least
 3.00"(76.2mm)fromanyedge,bafe,diptube
 orotherobstructiontoavoidsoundreections.
If the tank has a tapering shape, the sender
should be mounted over the deepest part of
the tank. If the tank is rectangular, mount the
sender as close to the center of the top of the
tank as possible.
Reference
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• ACandDCcircuitprotectiondevices
• WeatherDeck™waterproofcircuitbreakerandfusepanels
• Fusesandfuseblocks
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Mounting
SENDER
ELECTRICAL
CONNECTIONS
INDEX
HOLE
GASKET
Gasket Alignment Diagram
2. Before drilling for a new installation, place
rags,plasticlm,orothermaterialtoprevent
any debris from entering the tank. Cut center
hole in tank. PN 1810 requires a 1-5/8" hole
saw and PN 1811 requires a 1-1/2" hole saw.
3. Using the sender as a template, mark and drill
therstmountinghole,andinstallascrew
to hold the sender in place. Mark and drill a
secondholeasnearlyoppositetherst.
one as possible, and install a second screw.
Mark and drill the remaining holes.
4. When all holes are drilled, remove any rags
or plastic lmplacedtocatchdebrisinstep2.
Carefully remove any loose debris, especially
if it might contaminate fuel or water systems.
Remove the screws, align the gasket on the
sender, and install the sender and gasket on
the tank. The use of #10 panhead screws
is recommended. Hand tighten the screws
rmlytoamaximumtorqueof15in-lbs.