Dixon Bayco Installation Instructions Manual

Installation Instructions

For

Dixon Bayco

Flotech Thermo-Optic Sensors

and Thermistor Dummy

dixonvalve.com

Canada:

Dixon Group Canada Limited
Innisfil (Barrie), Ontario
Phone: [phone]
Fax: [phone]
Toll Free: 877-963-4966
E-mail: [e-mail]

USA:

Dixon Bayco USA
Chestertown, Maryland
Phone: [phone]
Fax: [phone]
Toll Free: 800-355-1991
E-mail: [e-mail]

Mexico:

Dixva, S. de R.L. de C.V.
Monterrey, N.L
Phone: [phone]-DIXON (34966)
Fax: [phone]
E-mail: [e-mail]

Europe:

Dixon Group Europe Ltd
Preston, England
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]

Asia Pacific :

Dixon (Asia Pacific) Pty Ltd Wingfield,
South Australia
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]

For Sales and Service Contact

FloTech Thermo-Optic Sensors and Thermistor Dummy

These instructions cover the following FloTech products:

FT150 - Replacement Thermo-Optic Overfill Probe
FT151 - Thermo-Optic Sensor with 2”NPT Probe Holder
FT155 - Electronic 5 Channel Dummy
FT152 – 2 Wire Thermo-Optic Retain Sensor with ½"

FloTech Thermo-Optic sensor and Thermistor Dummy are
mechanically and functionally compatible with Civacon and Scully
Thermistor, Thermo-Optic and Thermistor Dummy components.
These “Electronic” Thermistor sensors will provide reliable operation
when installed as replacements to conventional “Green Tipped”
Thermistor sensors. FloTech Thermo-Optic sensors and electronic
dummy provide high reliability, long life, and quick start up in cold
weather. “Civacon” is a registered trademarks of Civacon / Dover
Corporation.

Installation

1. FloTech model FT151 can be mounted in a 2" NPT female pipe
coupling or through a 2 3/8" hole. When mounting in a 2 3/8" hole,
the gasket and lock nut provided are used to retain the probe holder
in the tank shell or manhole. After the sensor is mounted remove the
cap.

2. Loosen the probe clamp screw and adjust the probe to the correct
level point. This is typically 3% of compartment volume. It is not
recommended cutting the standard 7" sensor to a shorter length.
This will cause insufficient time to stop the flow of product within the
load racks reaction time.

3. The actual sensing point adjustment should be determined by the
total response time required to prevent a tank overfill condition. The
FloTech sensor reaction time is one half second. The loading rack
will also have a reaction time. Once the probe is adjusted to the
proper height, tighten the clamp screw.

2 Rev: Dec 2008 THERMO-OPTIC SENSORS

FloTech Thermo-Optic Sensors and Thermistor Dummy

Wiring Instructions

It is highly recommended to use FloTech FT401 jacketed 7-conductor
cable when wiring a new system. FloTech cable is designed to be oil,
UV, and abrasion resistant. We incorporate a noble tin plated
stranded copper wire which resist corrosion. These features will
provide years of reliable service.

1. After all sensors are mounted in each compartment, align the
conduit openings so they face the roll over rail. Thread in cable
glands and pull a length of cable through the conduit openings
between each sensor.

2. Cut to length leaving approximately 8 inches extra length exiting
the top of each probe holder.

3. All sensor wires must enter or leave the probe holder through one
of the ½ NPT openings. Use FloTech FT402 ½ NPT cable glands to
ensure a water tight seal. Unused conduit openings must have a ½
NPT pipe plug installed. Use pipe dope on all ½ NPT threads to
ensure a water tight seal.

4. Wire the sensor according to diagram F1 below. Double check
your wiring connection when complete. It is highly recommended to
use a small amount of Silicone RTV sealant in each crimp
connection. Fill the FloTech butt end crimps with silicone RTV
sealant prior to inserting the wires then crimp. This will provide a
watertight and vibration resistant connection.

THERMO-OPTIC SENSORS Rev: Dec 2008 3

FloTech Thermo-Optic Sensors and Thermistor Dummy

5. When wiring is complete, replace each sensor cap and O-ring.

Do not pinch a sensor wire when installing the cap.

Diagram F1

4 Rev: Dec 2008 THERMO-OPTIC SENSORS

FloTech Thermo-Optic Sensors and Thermistor Dummy

Retain Sensor

FloTech model FT152 is designed to fit into a ½ NPT half coupling
welded into the bottom of each compartment. The mounting location
should be the lowest point of the tank. The collar should not protrude
more than ¾ inch outside the tank and flush with the inside of the
tank when possible. FloTech supplies a ½ NPT weld coupling with
each sensor. The coupling requires a 1 1/8" diameter hole cut in the
bottom of the tank. After the welded coupling has cooled, install the
sensor using pipe sealant or Teflon tape to lubricate and seal the
threads. Check thread engagement to ensure the retain sensor
prism tip is set deep enough into the tank as to clear weld collar.

DO NOT USE THE BODY OF THE SENSOR TO TIGHTEN!

Dixon Bayco Warranty

For complete warranty information, please refer to the latest

Dixon catalog.

THERMO-OPTIC SENSORS Rev: Dec 2008 5