Magnetrol B60 Installation And Operating Manual - page 9
46-605 Flanged External Cage Float Actuated Liquid Level Switches
9
7. Lift enclosing tube, switch, and base off float chamber.
Jam nuts and attraction sleeve are now accessible.
8. Measure the distance “D” from the top edge of the upper
jam nuts to the top of the float stem. Refer to
Figure 7
.
Record this measurement.
9. Loosen and remove upper jam nuts, guide washer and
attraction sleeve.
10. Loosen and adjust lower jam nuts to the desired position.
Tighten lower jam nuts securely. Refer to
Figure 7
.
11. Replace attraction sleeve on stem.
12. Replace upper jam nuts and guide washer on the stem in
the position previously noted. Tighten upper jam nuts
securely. Refer to
Figure 7
.
NOTE: Use a new enclosing tube gasket when reassembling enclos-
ing tube to the chamber. Make certain that all gasket surfaces
are thoroughly cleaned to allow proper gasket seating. Coat
enclosing tube threads with anti-seizing compound.
13. Replace enclosing tube, switch, and base on chamber.
Screw tube clockwise until tightened to torque values listed
on page 10.
14. Loosen the set screws at the base of the switch housing.
Rotate switch housing to correct position and tighten set
screws. Refer to
Figure 1
on page 5.
Caution:
After increasing gap setting, be certain to check for
proper operation of switch mechanism by raising and
lowering float assembly. Magnet must snap cleanly.
Additional float movement will be available after magnet
snaps.
15. Bring supply wires through conduit outlet. Follow steps 5
through 10 in
Wiring, Section 1.5
.
16. Test switch action by varying liquid level in float chamber.
NOTE: If switch mechanism fails to function properly, check vertical
alignment of control housing and consult installation bulletin
on switch mechanism. If the unit still fails to function
properly, consult the factory.
2.4.2 High level controls
On high level controls the switch trips on the higher
actuation point and resets on the lower actuation point.
Caution:
In high level controls, widening the differential requires
raising the trip point a proportional amount. The reset
point will remain the same.
To widen the differential by raising the trip point, follow
steps 1 through 16 in
Low level controls, Section 2.4.1.
Enclosing
tube nut
Conduit
connection
Switch
housing cover
Chamber
Float
Enclosing tube
Refer to
Figures 6 and 7
Housing
base
Figure 8