Kenco Engineering KEFS - Manual (Page 2)

SWITCH DIMENSIONS
INSTALLATION
Unpack the switch carefully. Inspect the unit(s) for damage. Report any damage to carrier immediately. Check the contents against
the packing slip and purchase order.
Operational Check
Before installing the switch a simple operational check should be performed, as follows:
1. Remove the Switch Housing Cover
2. Connect an Ohmmeter to CM1 and NC1 (See Wiring section).
3. With the conduit connection pointing downward, the “TOP” label facing upward, and the float downward (at rest), the
Ohmmeter should be showing approximately 0Ω.
4. Lift the float up. The Ohmmeter should be showing infinite Ω (some digital meters will show OL).
5. Disconnect the Ohmmeter
Mounting
1. Make sure the float will not be obstructed by the coupling, vessel wall or other vessel components.
2. To prevent galling, Kenco recommends the use of RectorSeal Virgin 100 pipe sealer with Teflon or an equivalent Teflon
based pipe sealer. Apply pipe sealer liberally to the threads of the switch.
3. Screw the switch into the process vessel by hand until snug. Tighten at least one full turn until switch is level and the ½-14
NPT conduit connection is on the bottom. To make sure switch is in the proper operating position place a level on the
wrench flats.
Wiring
It is recommended that conduit be installed onto the ½” NPT connection on the switch body. A seal drain fitting should be used to
prevent moisture from entering the switch. All wiring, conduit, and electrical fittings must conform to local electrical codes for the
location selected. If the switch is to be used in a Hazardous Area, the applicable sections of the National Electrical Code must be
followed as well.
(Note: The SPDT5-400 high temperature option is wired differently than the other KEFS models. It does not have a terminal block
and uses four 18 AWG color coded wires instead. It has a separate wiring instruction sheet that is included as an addendum to this
one)