Fluid Components International RF83 Manual Installation - Manual (Page 3)

Doc. No. 003147 Rev. B 2 - 3 Model RF83 Flow Switch
CHAPTER 2 - INSTALLATION FLUID COMPONENTS INTL
Flanged Mounting
As appropriate, use flange-face gaskets and sealants that are compatible with the process. Use the correct size
mounting bolts and tighten firmly. See Figures 2-1 and Appendix A for the mounting details.
Packing Gland Assembly
If used, the customer supplies a ball valve with the appropriate connection. Follow the threaded or flanged mounting
procedure as applicable.
Hand tighten the packing nut until the internal packing material is tight enough to prevent process media leakage, but
not enough to prevent the flow element shaft from sliding.
If used, open the valve. Check for process media leakage. Push or jack the flow element into the process pipe.
Tighten the packing nut 1/2 to 1 turn, torque to approximately 65 - 85 ft-lbs (88 to 115 N·m).
Rotate the split-ring locking collar to lineup with the connecting strap welded to the packing nut. Tighten two
1/4-28 hex socket cap screws on the split-ring locking collar. See Figures 2-1 and Appendix A for mounting details.
Control Circuit Installation
The standard configuration (see Appendix A, Figure A-7) of the instrument is with the control circuit already
installed in the local enclosure (the control circuit is physically mounted with the flow element). If the application
requires an optional remote operation (an operation where the control circuit is mounded separately from the flow
element), then continue with the following instructions.
Select a location for the remote enclosure within a 1000 feet (305 m) of the flow element. This location should be
easily accessible with enough room to open the remote enclosure. Secure the remote enclosure solidly to a vertical
surface capable of providing support. Use appropriate hardware to mount the remote enclosure. The outline
dimensions of a typical remote enclosure is shown in Appendix A.
Wiring Installation
Conduit Routing
All socket and/or terminal block connections are to be made through the 1 inch female NPT openings in the
enclosure(s). FCI strongly recommends that all electrical cables be run through an appropriate conduit for the
protection of the instrument and personnel.
Protection of the control circuit from moisture is an important consideration. Keep the entry of the conduit into the
enclosures in the downward direction so condensed moisture that collects in the conduit will not drain into the
enclosure. The local enclosure may be turned not more than 180° using the threads on the flow element stand pipe to
gain an acceptable orientation. In addition, FCI recommends sealing off the conduit with a potting Y or other sealing
method to prevent moisture from entering the enclosure.
Minimum Wire Size
Table 2-1 shows the smallest (maximum AWG number) copper wire that is to be used in the electrical cables used
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.