Franklin Fueling Systems TSP-HFS User Manual

TSP-HFS

Horizontal Float Switch

Installation Instructions

Franklin Fueling Systems • 3760 Marsh Rd. • Madison, WI 53718 USA

Tel: [phone] • 800 225 9787 • Fax: [phone] • www.franklinfueling.com

Overview

The TSP-HFS is a liquid sensor that is used to detect the
presence of a liquid in the normally dry Class 1, Division 1,
Group D Hazardous Areas of the interstitial area of double­wall storage tanks. The sensor is supplied with electrical
connectors, 25 feet of cable, and a cord-grip tting (see
diagrams). The TSP-HFS uses magnetic-oat / reed-switch
technology (the sensor must lay at so the oat can rise
freely with the level of a liquid).

When the oat rises more than approximately 1/2 of an
inch, the magnetically sensitive reed switch will open. An
open circuit is recognized as an alarm-condition at the
intrinsically safe (I.S) leak detection circuits of the FFS
(Franklin Fueling Systems) S940 alarm console.

Reed float switch opens when float
moves up approiximately 1/2" (13 mm)

0.375"

(9.5 mm)

1.5"

(38 mm)

(Blk)

(Red)

(Red)

C NC

Magnetic

In

(Blk)

Gnd

3"

(76mm)

Figure 1: TSP-HFS Dimensions

Testing the TSP-HFS

Testing this device is a matter of moving the oat away
from alignment with the sensor body. This should cause
an alarm at the S940 console. Test the sensor for proper
operation on a yearly basis, or more frequently per local
code.

• Slip joint pliers to seat the no-strip, self-sealing wire
connectors – connectors are supplied with the sensor.

• UL Classied Thread Sealant or pipe dope.

• *TSP-KI2 Riser Cap for 2-inch riser pipes, includes a
pre-installed 1/2 inch NPT compression gland (cord grip)
tting. Other riser caps are available for different riser
pipe sizes – consult your factory rep.

• * Riser pipe – 2 inch min. with all rough edges
removed / deburred from the inner edges.

* Needed for installation in UST interstitial areas (Figure 2)

Installation Sequence

1. Install Riser Pipe, Manhole.

2. Install conduit, EYS ttings, and weatherproof
junction box.

3. Shut off power.

ELECTRICAL DANGER Avoid electrical
shock hazards: ensure all power
going to the ATG console is turned off,
tagged, and locked-out at the power
panel before doing any maintenance or
installation work at the ATG console.

4. Run a pull-wire down the riser and around the
inner tank. You will need access to both ends of
the pull wire.

5. Measure the length of the riser pipe + 1.5 x
diameter of tank = _________total length. Mark
this length on the cable and pull it through the
TSP-KI2 riser cap cord-grip until the mark is 12
inches (30.5 cm) above the tting. Tie one end of
the pull-wire to the sensor pull cap and pull the
wire until the sensor cable moves just above the
cord-grip (leave the pull wire in place: loop the wire
around the cable) and then tighten the tting.

Materials Required

• Optional – TSP-DB1 Epoxy Seal kit for no-strip electrical
connectors – recommended for sites: within ood zones,
high groundwater tables or with poor drainage.

• 1/2 or 3/4 inch NPT (National Pipe Thread, tapered),
Rigid Metal Conduit (RMC) or nonmetallic (PVC) conduit
if allowed by local codes.

• EYS Seal ttings and Epoxy to ll the tting after
operational testing is completed.

• Weatherproof junction Box, gasket, and cover, plus a
3/4 to 1/2 inch NPT reducing bushing if 1/2 inch RMC is
used – see the ATG Installation Guide for recommended
electrical Junction Boxes.

• Wire: THHN, TFFN or THWN, 18 AWG, White & Black,
or Alpha Cable # 58411, 0.114 O.D. – 1,500 feet (457
meters) max. length. Alpha cable #58411 must be use
with nonmettalic conduit.

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