AMETEK 7014 Unifloat Level Float Sensors - Manual

B/W Controls
Series 7014
Unifl oat ® Installation Manual
IMPORTANT
Just before fi nal installation into the tank and with the switches mounted inside the guide tube, slide the fl oat up and
down the tube. This will reset all the switches to their normal condition. If the Type “C” Reed Switch was ordered,
the common switch wire (C) in the UNIFLOAT is bare and is attached to the ground screw with a green wire.
RATINGS:
The factory assembled units are rated for operating pressures up to 500 PSI and temperatures of 0° to 250° F
(-19° to 121°C). For pressure tight applications pipe sealing compound should be used on the holder mounting
threads. It is best to install in an upright position, but can be mounted up to 30° from vertical. While some small
loads such as pilot lights may be operated directly from the switches, most applications will require control relays.
Conventional relays can be used, however, B/W relays have unique characteristics that make them desirable for
many applications. Diagrams are attached showing B/W recommended wiring for various relays in some typical
applications.
SWITCH ADJUSTMENT:
Refer to your order for details on the switch settings provided when the UNIFLOAT was shipped from the factory.
If different settings are desired, remove cover on holder. Do not remove any other fi ttings. Remove the internal
assembly consisting of the switches and common wire, (On Type “C” Reed Switch Only), terminal block, and
mounting plate. The set lengths for each switch actuation is measured from the bottom of the terminal block
mounting plate, and is 1.25” + longer than the set length measured from the bottom of the holder mounting threads,
based on a liquid with 1.0 specifi c gravity. Each switch is marked with the actuation point, and the differential travel
is 0.1 inch. Switch actuation will depend on the actual specifi c gravity of the liquid. See the tables below for set
length adjustments for liquids with specifi c gravities other that 1.0.
DIRECT OPERATION:
Switches close on the rising level.
FLOAT MAGNET
FLOAT MAGNET�
FLOAT MAGNET
FLOAT MAGNET
FLOAT MAGNET�
FLOAT MAGNET�
FLOAT MAGNET�
FLOAT MAGNET�
INVERSE OPERATION:
Switches close on the falling level.
SWITCH CONVERTION FROM DIRECT TO INVERSE:
In order to change a Type “I” or Type “C” switch from direct operation to inverse operation, rotate the switch 180°
end-to end. For Type “C” switch, re-attach to bare wire. For Type “I” switch, re-tape to the bare wire.
TYPE “I” SWITCH TYPE “C” SWITCH
VOLTS
MAXIMUM CURRENT
AC DC
25 440mA 400mA
50 220mA 200mA
120 90mA 80mA
REED SWITCH RATINGS
DIRECT OPERATION INVERSE OPERATION DIRECT OPERATION INVERSE OPERATION
S.G.
SUBTRACT FROM
LENGTH
S.G. ADD TO LENGTH
1.5 0.37 Inch 1.0 NONE
1.4 0.31 Inch 0.9 0.12 Inch
1.3 0.25 Inch 0.8 0.27 Inch
1.2 0.18 Inch 0.7 0.48 Inch
1.1 0.10 Inch *0.65 0.62 Inch
1.0 NONE *Recommended Minumum
SPECIFIC GRAVITY ADJUSTMENT