2. Overview/System description
A changeover signal is sent via the LMC 301
once a pre-defined differential pressure
is reached between the pressurized and
pressure-relieved main feed line (analog
pressure sensors (9)/(10)). The change-
over valve (5) switches over, relieving the
previously pressurized main feed line while
pressure increases in the previously relieved
main feed line after a brief interval time. The
control and metering pistons are actuated
once again and lubricant is dispensed to
the lubrication points or to the progressive
feeders in downstream alignment (12) on
the opposite side of the feeders, section (A)
or (B).
The LMC 301 Controller then switches off
the Dual Line pump (2) and the changeover
valve (5) switches to pressure relief (pause).
The pump fill level is monitored by a fill level
switch.Fault notifications can be shown via
an external indicator lamp (connected to
fault output, in addition to the display).
2.2.1 System design
)See Figure 3
After the pause time elapses, the pump de-
livers lubricant to the electrical changeover
valve (5) via the grease feed line (3). De-
pending on the changeover valve (5) setting,
the lubricant is delivered onward to the Dual
Line distributors (8) via main feed line 1 (6)
or main feed line 2 (7).
With sustained feeding, the pressure in the
actuated main feed line increases until the
system resistance is overcome. The con-
trol and metering pistons of the Dual Line
distributors are then actuated. Lubricant is
dispensed to the lubrication points or the
downstream progressive feeder (12) via the
branch lines (11).
Once all feeders have dispensed their
quantity of lubricant (control and metering
pistons are in their end position), the first
half of the connected lubrication points in
section (A) or (B) has been supplied with
lubricant. The pressure builds further be-
cause the pump continues to feed lubricant.
EN
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