Fluid Components International FR73B Complete Manual - Manual (Page 3)

FR78B Flow Switch/Monitor FLUID COMPONENTS INTERNATIONAL LLC
This page is subject to proprietary rights statement on last page 3 Doc. No. 06EN003281 Rev. A
Required Materials
Appropriate wire, cable, and conduit.
Note: Potting Y's for all the interconnecting wires are recommended when installing the instrument's control circuit
in an enclosure. Other requirements may vary based on local wiring codes.
Pre-Installation Procedure
Warning: Only qualified personnel should install this instrument. Install and follow safety procedures in accordance
with the current National Electrical Code. Ensure that power is off during installation. Any instances where
power is applied to the instrument will be noted in this manual. Where the instructions call for the use of
electrical current, the operator assumes all responsibility for conformance to safety standards and practices.
Caution: Damage resulting from moisture penetration of the local or remote (optional) enclosure is not covered by
product warranty.
Verify Serial Numbers
Verify that the flow element serial number matches the control circuit serial number.
Verify Installation Location
Prepare the vessel for installation, or inspect the already prepared location to ensure that the instrument will fit into the system.
The location that should have been prepared at the time of order should be at least 20 pipe diameters downstream and 10 pipe
diameters upstream from any bends or interference in the process pipe or duct to achieve the greatest accuracy.
Flow Element Installation
Verify the correct orientation of the flow element. Install the flow element in-line with the process media flow. See the specifications
on page 2 for the various process connections available. See Appendix A, Figure 8, for the dimensions and orientation of the flow
element. Vertical mounting is as shown in Figure 8. Horizontal mounting is to have the flow arrow positioned up, or on top, and in the
direction of flow.
Wiring Installation
Conduit Routing
All socket and/or terminal block connections are to be made through openings in the remote enclosure if used. FCI strongly
recommends that all electrical cables be run through an appropriate conduit for the protection of the instrument and personnel if a
remote enclosure is used.
Protection of the control circuit from moisture is an important consideration. Keep the entry of the conduit into the enclosure in
the downward direction so condensed moisture that collects in the conduit will not drain into the enclosure. In addition, FCI
recommends sealing off the conduit with a potting Y or other sealing method to prevent moisture from entering the remote
enclosure if used.
Minimum Wire Size
Table 1 shows the smallest (maximum AWG number) copper wire that is to be used in the electrical cables for connecting the
instrument to the customer alarms and power. Use a lower gauge of wire for less of a voltage drop. Contact FCI concerning
greater distances than those listed in the table.
Table 1 - Interconnecting Cable Size (AWG)
M axim um Distance for AW G
Connection
10 ft.
(3m )
50 ft.
(15m )
100 ft.
(31m )
250 ft.
(76m )
500 ft.
(152m )
1000 ft.
(305m )
Input Pow er 22 22 22 20 18 16
Relay 24 22 20 16 12 10