45-610 Displacer Type Liquid Level Switches and Proof-er
®
Switches
9
4. Vibration may sometimes cause terminal screws to work
loose. Check all terminal connections to be certain that
screws are tight.
5. On units with pneumatic switches, air (or gas) lines sub-
jected to vibration, may eventually crack or become loose
at connections causing leakage. Check lines and connec-
tions carefully and repair or replace, if necessary.
NOTE: As a matter of good practice, spare switches should be kept
on hand at all times.
3.2
What to avoid
1. Never leave switch housing cover off the control longer
than necessary to make routine inspections.
2. Never place a jumper wire across terminals to “cut-out”
the control. If a “jumper” is necessary for test purposes,
be certain it is removed before placing control into
service.
3. Never attempt to make adjustments or replace switches
without reading instructions carefully. Certain adjust-
ments provided for in level controls should not be
attempted in the field. When in doubt, consult the
factory or your local representative.
4. Never use lubricants on pivots of switch mechanisms.
A sufficient amount of lubricant has been applied at the
factory to ensure a lifetime of service. Further oiling is
unnecessary and will only tend to attract dust and dirt
which can interfere with mechanism operation.
5. Never attempt to readjust magnetic attraction sleeve.
It is factory set, and tampering may cause failure of
control while in service, even if manual operation
activates switch.
