FCI FLT93B, Installation, Operation & Maintenance Manual

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INSTALLATION FLT
®
Series FlexSwitch
TM
12 Fluid Components International LLC
Wiring The Remote Enclosure Configuration
This procedure is for instruments with the control circuit located remotely (remote housing) from the sensing element (local enclosure).
Locate the Remote Hardware Location
Warning: Ensure that all power is off before wiring any circuit.
Drawings in Appendix A show the remote enclosure along with the physical dimensions to properly mount it. Select a location for the remote
enclosure within 1000 feet (305 m) of the sensing element NOTE: Maximum cable length is 1000 ft. Pigtail sensing elements cannot be
located more than 10 feet (3 m) from the enclosure unless the pigtail is extended with the proper size cable listed in Table 2-1. If the cable
is extended the cable connections should be located in a junction box with a 6-position terminal block. All 5 conductors and the shield must
have their own termination. The remote enclosure should be easily accessible with enough room to open the enclosure cover at any time.
Secure the remote enclosure solidly to a vertical surface capable of providing support. Use appropriate hardware to secure the enclosure.
1. Remove the control circuit from the terminal board socket by loosening the two thumbscrews on top of the transformer bracket. Note:
The screws are captive. Note the orientation of the control circuit. Grab hold of the transformer bracket where the screws are and unplug
the control circuit from the terminal board by pulling on the transformer bracket.
2. Install conduit between the remote (electronics) enclosure, disconnect device and the power source\monitoring circuit. Install conduit
from the remote electronics enclosure to the local (sensing element) enclosure. Provide watertight hardware and apply thread sealant to
all connection to prevent water damage.
3. Refer to the Wiring Input Power discussion at the end of this section for the available input power configurations. Input power wiring
configurations are the same for local and remote enclosure options and also any output relay configuration.
4. Run a five-conductor, shielded cable from the local enclosure to the remote enclosure. Use Table 2-1 to determine which wire gauge to use (wire
between the local and remote enclosures according to Figure 2-6). It is recommended to include a 14 AWG wire between the two enclosures con-
nected to the grounding lugs and then to earth ground close to the control circuit housing, with the connection not to exceed 1 ohm.
5. When connecting the relay wiring, do so with complete understanding of what the process requires of the instrument. The instrument
has dual SPDT or single DPDT relay output contacts dependent on the jumper configuration for each alarm switch point. For the relay
terminals and logic, refer to Figure 2-9. Also refer to Table 3-5 and Table 3-6 in Section 3 - Operation. Relay contacts are shown with the
relays de-energized. Wire in accordance with the system requirements.
Figure 2-9 Remote Wiring Diagram