FCI Home Appliances 8-66B, 12-64B User Manual

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Document 06EN003322 Rev. -

12-64B, 8-66B Installation, Operation and

Troubleshooting Guide

Step 1. Pre-Installation

A. To get the best results, the sensor should be mounted 20 pipe diameters downstream from any flow disturbance

(valve, pipe elbow) and 10 pipe diameters upstream from any disturbance.

The instrument tag shows the model number, tag number (if
noted on the order) and serial number along with other
important safety information. Compare this information with the
appropriate pipe installation drawings to be sure the instrument
is the correct configuration. Match the tag serial number on the
enclosure, flow element and control circuit.

Tag Location

On the top side of the local enclosure

B. Verify the serial numbers on the enclosures, flow element and electronics (control circuit) match. The instrument

may not work if the serial numbers do not match.

Flow Element Serial Number.
Also Showing Sensor Orientation Flat.
(Located near the enclosure.
It is also on the enclosure tag.)

Electronics Serial Number

C. Recommended installation/troubleshooting tools are a 1-3/8 inch open ended wrench to fit the NPT connection, a

small flat blade screw driver for manipulating potentiometers, a medium flat blade screwdriver for tightening
connections, 3 mm allen wrench for CENELEC approved instruments, and a DVM for Ohm/Voltage
measurements.

Step 2. Flow Element Installation

Alert: DO NOT change the orientation of the flow element in the enclosure as the interconnecting RTD and

heater wiring could be stressed and damaged. DO NOT apply any torque to the flow element
enclosure - only apply to the pipe surface itself.

Install the flow element, with the Flat Up and Level (shown above) or parallel to the flow media (±2°) for top mounted
instruments. The enclosure, flow element and electronic control circuit card serial numbers should all match.

When mounting the instrument the correct orientation of the flow element must be maintained to ensure repeatability to
within specifications.

Apply sealant to the male threads.

Carefully place in the process media line with the machined flat facing up.

Tighten the process connection. To avoid leaks do not overtighten or cross-thread connections.

Shown below is the 1 inch NPT mounting.

12-64 Flow Switch and 8-66 Level Switch Installation and Outline Drawing

Step 3. Wiring Preparation

Before the instrument is opened to install the wiring, FCI
recommends that the following ESD precautions be
observed: Use a wrist band or heel strap with a
1 megohm resistor connected to ground. If the instrument
is in a shop setting there should be static conductive mats
on the work table and floor with a 1 megohm resistor
connected to ground. Connect the instrument to ground.
Apply antistatic agents such as Static Free made by
Chemtronics (or equivalent) to hand tools to be used on
the instrument. Keep high static producing items away
from the instrument such as non-ESD approved plastic,
tape and packing foam.

The above precautions are minimum requirements to be
used. The complete use of ESD precautions can be found
in the U.S. Department of Defense Handbook 263.

Open the instrument enclosure to wire the instrument.
Remove the control circuit by lifting and rocking the
circuit board back and forth to expose the terminal block
as shown. The wiring connections are then accessible.

Step 4. Wiring the Instrument

CUSTOMER
WIRING

N/O

ALARM
# 2

SAFETY
GND

N/C

ALARM
# 2

PWR PWR

FACTORY WIRING

N/O
ALARM
# 1

(COM 8)
(COM 8)

COM
ALARM
# 1

(HTR 10)

AC or DC
(+) (-)

CUSTOMER WIRING

(REF 9)

COM
ALARM
# 2

12-64/8-66 Wiring Pictorial

(HTR 7)
(ACT 7)

N/C

ALARM
# 1

Caution:

Only qualified personnel are to wire or test this instrument.
The operator assumes all responsibilities for safe practices
while wiring or troubleshooting.

Model 12-64/8-66 2 Doc. No. 06EN003322 Rev.-

The instrument contains electrostatic discharge (ESD)
sensitive devices. Use standard ESD precautions when
handling the control circuit.

Alert: