GMG-LEZ Operation manual
Page 17 of 37
B0840
4.5 Level control (option)
Level control "C": Minimum level monitoring for liquid grease NLGI-class 000 up to
grease NLGI-class 2
When the reservoir is empty and the pump drive shaft rotating, the contact will be switched.
The empty signal is intermitting.
The switching mechanism may change itself, e.g. during reservoir filling.
Therefore, in case of an external control, evaluation of the signal available during pump
switch-on must be delayed (by approx. 5 seconds).
Lubricant available
No lubricant available
(permanent signal)
(intermittent signal)
Level control "C"
Level control "F": Minimum level monitoring for oil
Level control "F" consists of a PUR float that is raised
up in the oil. When the oil level falls below minimum,
the contact will open.
Level control "F"
The PUR float is suited for mineral oils without synthetic additives only.
When using other media, their compatibility with the float material
needs to be checked.
The PUR float is not resistent to:
Emulsions
Phosphoric esters
Organic esters
Triglycerides (rape oil)
Synthetic esters
Polyglycols
