Scully SP-FU Series Manuel utilisateur

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

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.

Scully Signal Company I

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

Scully Signal Company

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

Scully Signal Company 3

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.

Scully Signal Company

Insallation

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.

Scully Signal Company 5

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

Scully Signal Company

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.

Scully Signal Company 7

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.

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