Scully SP-FU Series User manual

Scully Five Wire Optic Overfill Prevention System
Model SP-FU Series
61603 REV A

Warnin - Explosion Hazard
Scully Overfill Prevention Sensor
Installation & Wiring Instructions
WHEN PERFORMING ANY WORK AROUND THE VESSEL BE SURE TO COMPLY WITH ALL
APPLICABLE REQUIREMENTS OF THE NATIONAL FIRE PROTECTION ASSOCIATION NFPA-30
“FLAMMABLE AND COMBUSTIBLE LIQUIDS CODE”, FEDERAL, STATE AND LOCAL CODES AND
ANY OTHER APPLICABLE CODES AND REGULATIONS. WHEN APPLICABLE, EUROPEAN
CENELEC REQUIREMENTS MUST BE COMPLIED WITH.
DO NOT SMOKE OR PERFORM ANY METAL WORK WITH PRODUCT IN THE TANK OR WHEN
FUEL VAPOR IS PRESENT. DO NOT PERFORM ANY OPERATION WHICH MAY IMPAIR THE
TANK SAFETY. DO NOT PERFORM WORK ON THE VESSEL UNLESS IT IS GAS & VAPOR FREE.
BEFORE INSTALLATION, HAVE THE TANK REPAIRED OR REPLACED IF IT SHOWS ANY SIGNS
OF LEAKAGE.
TO PREVENT IGNITION OF FLAMMABLE OR COMBUSTIBLE ATMOSPHERES DO NOT INSTALL
OR REPAIR IN HAZARDOUS AREA. BE AT LEAST 6 FEET FROM ANY FUEL LOADING
FACILITY/OPERATION BEFORE SERVICING/TESTING.
IMPROPER SENSOR CONNECTIONS, COMPONENT SUBSTITUTION OR TAMPERING MAY
IMPAIR INTRINSIC SAFETY AND CREATE HAZARDOUS CONDITIONS. INSPECT SENSOR
CONNECTIONS REGULARLY FOR WEAR OR DAMAGE TO AVOID SAFETY OR
ENVIRONMENTAL HAZARD.
ALWAYS WEAR SAFETY GOGGLES AND PROTECTIVE CLOTHING WHEN WORKING WITH ANY
LIQUID WHICH MAY BE POTENTIALLY HARMFUL OR HAZARDOUS.
TO AVOID STATIC CHARGE; CLEAN SENSOR PRISM ONLY WITH DAMP CLOTH.

Scully Signal Company
Flammable and Combustible Liquids Code
Tank Vehicle and Tank Car*
Loading through open dome
Tank Vehicle and Tank Car*
Loading through open dome
Loading through bottom
connections with atmospheric
venting
Loading through bottom
connections with atmospheric
venting
Loading through closed dome
with atmospheric venting
Loading through closed dome
with atmospheric venting
Loading through closed dome
with vapor control
Bottom loading with vapor
control. Any bottom unloading
1
2
1
2
1
2
2
2
Within 3 feet of edge of dome, extending in all
directions.
Area between 3 feet and 15 feet from edge of dome,
extending in all directions.
Within 3 feet of point of venting to atmosphere
extending in all directions.
Area between 3 feet and 15 feet from point of venting
to atmosphere, extending in all directions. Also up to
18 inches above grade within a horizontal radius of
10 feet from point of loading connection.
Within 3 feet of open end of vent, extending in all
directions.
Area between 3 feet and 15 feet from open end of
vent, extending in all directions. Also within 3 feet of
edge of dome, extending in all directions.
Within 3 feet of point of connection of both fill and
vapor lines, extending in all directions.
Within 3 feet of point of connections extending in all
directions. Also up to 18 inches above grade within
horizontal radius of 10 feet from point of connection.
LLooccaattiioonnNNEECC CCllaassss 11,,
GGrroouupp DD
EExxtteenntt ooff CCllaassssiiffiieedd AArreeaa
Figure 1 — Flammable and Combustible Liquids Code Table
* When classifying e tent of area, consideration shall be given to fact that tank cars or tank vehicles may be
spotted at varying points. Therefore, the e tremities of the loading or unloading positions shall be used.

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Table of Contents
Table of Contents
Section 1 Applications
Application........................................................................................... 2
Technical Specifications ........................................................................ 3
Section 2 Installation
Mechanical Installation ...........................................................................4
Mounting into Threaded Opening ..........................................................5
Mounting into Through-Hole Entry........................................................5
Sensing Level - Height Adjustment.........................................................6
Shortening the Sensor Shaft....................................................................7
Sensor Replacement................................................................................7
Electrical Installation ..............................................................................7
Section 3 Wiring Diagrams
SP-FU, 1 Compartments.........................................................................8
SP-FU, 2 Compartments.........................................................................9
SP-FU, 3 Compartments.......................................................................10
SP-FU, 4 Compartments.......................................................................11
SP-FU, 5 Compartments.......................................................................12
SP-FU, 6 Compartments.......................................................................13 .
Section 4 Parts Sheets
SP-FU/MHC NPT HOLDER..................................................................14
SP-FU/MHCF FLANGE HOLDER.........................................................15
SP-FU/MHCE BSPT HOLDER ..............................................................16
SP-FU/MHCFE FLANGE HOLDER.......................................................17
SJ-6 With SJ-6SO (4 J-SLOT) ...............................................................18
SJ-6 With SJ-6W (3 J-SLOT) ................................................................19
SJ-6 M20 With SJ-6W (3 J-SLOT) ........................................................20
SJ-6 M20 With SJ-OB (4 J-SLOT).........................................................21

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Applications
Application
The Scully Five-Wire Optic Overfill Prevention Sensor(s) employs optic technology to detect the presence
of liquid in a tank or vehicle compartment. The sensor is wired to a Scully Socket, mounted on the
vehicle (tanker) chassis. Connecting a plug (and cable) to the socket connects these sensors to a Scully
Overfill Prevention Controller located at a rack.
The Scully SP-FU Overfill Prevention Sensor is available in two different holders for tank mounting. The
holder(s) provide space for wiring connections inside the holder. Model SP-FU/MHC is a Five-Wire optic
sensor with a 2” NPT threaded holder. Model SP-FU/MHCF is the sensor with a flanged style holder.
This sensor assembly is designed to sense liquid product when it is near the top of a tank trailer
compartment. It is intended to be used either
1.As part of the Scully IntelliCheck® Overfill & Retained Product Monitoring System
2.As a stand-alone overfill prevention sensor in conjunction with the appropriate Scully overfill prevention
control monitor mounted at the loading rack or fill stand.
3.Scully Load Anywhere
When properly installed in a tank trailer compartment, at a point just above the compartment's normal fill
capacity (marker), the SP-FU Overfill Prevention Sensor will sense an impending overfill condition and
signal for immediate shutdown of product flow.
Sensor Outline Drawin
Standard sensor shaft length of 7-inches with standard 2 1/8-inch high holder cover provides for sensing
level adjustability as shown. Longer shaft lengths and a 1 3/8 inch high holder cover are also available to
accommodate most tank trailer mounting configurations (consult factory for details).
CENELEC VERSION IN ( )
Manufactured under US Patent 6,049,088

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Applications
TECHNICAL SPECIFICATIONS
Operatin Temperature Ran e
-40°F to +140°F (-40°C to +60°C)
Petroleum Product Ran e
Gasoline blends and light fuel oils
Exposed Materials
Aluminum, zinc, borosilicate (Pyrex®) glass, epoxy, conductive nylon and Viton® seals
Detection Level and Size
The detection level is adjustable. Refer to Sensor Outline Drawing on previous page, shown for 7” shaft
length. Consult factory for longer sensor length to meet other detection level requirements.
Level Repeatability
0.04 “ (±1 mm)
Electrical Leads
18” (45 cm) long, 18 AWG (0.82mm²)
Cable Entry
Two holes, 1/2” NPT (M20 X 1.5) threads
Approvals
The sensor is intrinsically safe for mounting in Class I, Division 1, Groups C & D Hazardous location in
accordance with Scully Control Unit approval ratings.

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Insallation
4
MECHANICAL INSTALLATION
The sensor is designed to withstand vibrations in road transport. However, the sensor should not be
subjected to any mechanical impact as it may damage the sensor.
MOUNTING LOCATION
The sensor assembly should be mounted in the top of a tank trailer compartment close to the longitudinal
centerline of the tank. In many cases, it is most practical and convenient to mount the sensor holder in
the manlid assembly of the compartment. Many manlid manufacturer's provide a threaded or through-
hole opening for an overfill prevention sensor in the manlid assembly. In choosing a mounting location
other than in the manlid assembly, consider locating the holder in an area where the sensor can be
conveniently reached from the access opening in the manlid assembly. This will greatly simplify any
future maintenance to the sensor.

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Insallation
Mountin into Threaded Openin
Sensors with Model MHC holder may be mounted (threaded) directly into a 2-inch NPT threaded opening
(bushing). This is the preferred mounting method as it provides the most secure installation, requiring the
least amount of periodic maintenance. When installing the sensor holder in this manner, the gasket and
conduit nut is not used. Before installation, always apply a liberal amount of Anti-Seize/Thread Lubricant
to the threads of the holder. This will assure a vapor tight joint which will be able to be easily
disassembled, if required, in the future. Scully recommends FEL-PRO® C5A® Copper Based Anti-
Seize/Thread Lubricant or equivalent.
Mountin into Throu h-Hole Entry
Although Scully does not recommend this mounting method, if this method is used, the Model MHC
sensor holder may be mounted directly through a 2 3/8-inch diameter opening (hole) using the nut and
gasket supplied. The gasket is positioned on the sensor holder threads outside the opening, and the
conduit nut secures the sensor holder to the tank from inside the opening. This mounting method
requires the conduit nut be tightened securely against the inside of the tank opening to compress the
gasket sufficiently to effect a vapor tight seal. In addition, like all threaded connections subject to
vibration, this mounting method requires that the conduit nut be periodically checked for proper and
continued tightness. We recommend at least a yearly check.
Flan ed Holder Mountin
Sensors with MHCF style holders (shown in Sensor Outline Drawing) have a 6-bolt pattern conforming to
the 2 1/2-inch TTMA flange patten for mounting directly onto a man lid or tank shell. Install the gasket
supplied between the holder and the tank. The sensor holder is secured to the tank using (6) six 1/4” hex
head bolts, nuts and lock-washers. If there is a mating flange welded on the tank, use appropriate bolts to
thread into the mating flange. Tighten the bolts securely to compress the gasket sufficiently and effect a
vapor tight seal.
Caution: Do not install the sensor in a ressive substances that may attack the
exposed materials on the sensor.

Installation
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SENSING LEVEL - HEIGHT ADJUSTMENT
The SP-FU sensor’s sensing level is marked on the sensor with an arrow on the prism protector. Adjust
the sensing level by loosening the extension shaft locking screw located inside the sensor holder.
After loosening the lock screw, slide the sensor shaft up or down using a twisting motion. Sensor Outline
Drawing shows the adjustment range for a standard sensor shaft length of 7-inches. Longer shaft lengths
and a 1 3/8-inch high cap are also available. Consult Scully for part numbers. Care must be taken that
the cap does not exceed height specifications for the construction of the tank.
The sensor shaft length may be shortened if necessary. See instructions following.
LEVEL
SENSING
CAUTION: The liquid level sensin point for an overfill prevention sensor is enerally set at a
point 1/4” to 1/2” above the compartment's normal fill capacity (marker). When settin this
level, it is important to take into account the ulla e remainin in the compartment and the
emer ency shutdown times at the terminals where the vehicle will be loadin . If insufficient
ulla e remains above the overfill prevention sensor's sensin level to contain the excess
product which will flow into the compartment, a spill CAN OCCUR before the flow completely
stops.

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Installation
Shortenin the Sensor Shaft
The sensor shaft may be shortened to a minimum of
5 1/2” (140mm) when measured as shown.
A three (3) wheel tubing (pipe) cutter is required.
Grasp the sensor shaft in a padded vise. Do not use an
unpadded vise. Crushing the shaft will damage the
sensor and void the warranty. Using the pipe cutter,
trim the shaft length by carefully cutting away the excess
upper part of the shaft.
File the top edge of the shaft, both inside and outside.
Filing the edge will prevent damage to the sensor holder
O-ring. Insert the wire protective cap into the top of the
sensor shaft to prevent damage to the sensor wires.
LEVEL
SENSING
5.50" (140)
POINT
DO NOT CUT
BELOW THIS
PROTECTOR
CAP
LEVEL
SENSING
5.50" (140)
POINT
DO NOT CUT
BELOW THIS
PROTECTOR
CAP
SENSOR REPLACEMENT
It should be noted that a sensor can not be repaired. A damaged or faulty sensor (shaft) must be replaced
with an equivalent Scully sensor and may be mounted into the existing holder. The O-ring inside the
holder may incur damage when removing the faulty sensor. The Scully replacement sensor assembly is
supplied with a replacement O-ring for the holder. After removing the faulty sensor from the holder,
remove the old O-ring from the O-ring groove located in the bore of the holder using an O-ring pick or
other suitable tool. Be careful not to damage the O-ring groove. Apply lubricant, either petroleum jelly or
white grease, to the O-ring before installation. Install the new sensor into the holder per the installation
instructions.
ELECTRICAL INSTALLATION
All connections between the sensor leads and vehicle (truck) wiring are to be made inside the sensor
holder. Use appropriate cable glands for strain relief and watertight installation. If conduit is used, its
connections to the holder must be watertight and free from sharp edges. Unused holes must be plugged
with blanking plugs. The sensor features five wires Black (ground/earth), Red (power), Green (diagnostic),
Yellow (input signal) and Orange (output signal). The connections should be made using crimp connectors
or other permanent means. It is suggested that electrically non-conductive grease is applied to the
connections to further prevent corrosion problems. Leave sufficient wiring length as service loop in each
holder for future maintenance. DO NOT REMOVE (OR CUT OFF) THE LABEL THAT IS ATTACHED TO
ONE OF THE SENSOR WIRES.
Scully recommends the use of our special cable for wiring on a vehicle. If using conduit, 18 AWG (1mm² )
or larger wires should be employed. The SP-FU Sensor should be wired in accordance with the appropriate
Scully Wiring Diagram.

Wiring Diagra s
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Wiring Diagra s

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Wiring Diagra s

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Wiring Diagra s

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Wiring Diagra s

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Wiring Diagra s

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Parts Sheets

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Parts Sheets

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Parts Sheets

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Parts Sheets
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