Dwyer F7-EB - Manual

To Install . . .
Locate and prepare entrances in tank side so that level switch unit will be in vertical position with wire leads up when
installed on outside of tank. Connect NPT inlet and outlet ports of unit to tank entrances. 1/2" NPT in top of unit
provides for electrical connection. (See wiring information below and on back of sheet.) Use 1/4"-20 threaded
mounting holes to attach unit on any suitable vertical surface.
Externally-Mounted Bottle-Style Level Switches
Model F7-EB
Approvals
- Specifications -
Operating Temperature
Pressure Rating
Electrical Termination
Switch Operation
Mounting Attitude
Switch
-40°F to 300°F (-40°C to 148.9°C)
500 psig Max @ 70°F
No. 18 AWG, 24" L, Polymeric Lead Wires
U.L. Recognized File No. E45168
CSA Report LR 30200
Selectable, N.O. or N.C. by Inverting Float On Stem
Vertical with Lead Wires Up
20 VA (Pilot Duty)
Typical Wiring Diagram
SPST, N.O. or N.C.
Maintenance (All Units) . . . An occasional "wipe-down" cleaning is the only maintenance normally required.
Standard single level units are
supplied with SPST switch opera-
tion, N.O. (Dry).
To convert operation to N.C. (Dry):
Remove level switch unit from
housing, remove lower grip ring
and invert float on unit stem.
Reinstall lower grip ring into
groove and reinstall level switch
unit** in housing.
**Clean or replace O-ring on
mounting plug (if required) before
reinstalling float/stem assembly
in housing. Mounting plug must
be installed flush with housing.
Note
Switch operation can be selected
without disturbing installation of
unit on tank.
Housing
O-Ring
Stem
Union
Union
or
Pipe Fitting
Mounting
Plug
Groove
Float
Grip
Ring
Lockwasher
1/4-20
Screw
* Switch actuation level nominal
(Based on a liquid specific gravity of 1.0)
1/2" NPT
(Female)
2 1/4 - 12 Thd.
W/ O-ring
3/4" NPT
Outlet
3/4" NPT
Inlet
Approx.
7"
2" Dia.
Float
2-5/8"
Dia. Ref.
4-1/4"
Ref.
2-1/8"
Dia.
2-1/2" *
1/4-20 Thd.