18
4. Operation
Operation of the pumping centre
When pressurisation starts, control unit opens both the line to be pressurised and the pump solenoid valves. The
pneumatic system starts the pump and opens the line control valve. Pressurisation continues until the pressure at the
pressure monitoring unit reaches a pre-set acknowledgement level. After acknowledgement, the control unit closes the
solenoid valves, the pump stops and pressure discharges from the line to the lubricant barrel.
If the lubricant level in the barrel reaches the low limit level during pumping, the low level switch sends an alarm to the
control unit and pumping is stopped. The alarm can be reset by replacing the lubricant barrel and resetting the alarm at
the control unit.
Commissioning
Electric shock
Electrical connections must only be made by qualified electricians. Minimise the risk of electric
shock by
making sure that the pumping centre is de-energised before making any connections.
Power must be turned off before any work involving the handling of conductive parts or opening
any pos. of the system or product.
Pressurised lubricant
Make sure that the system is depressurised. Depressurise the grease filter before opening it
with the help of a bleed screw located in the filter plug (11, Figure 5). Turn off the air supply by
lifting the shut
-off valve button (1, Figures 7 & 8) or set air pressure to 0 bar using the pressure
regulator (2, Figures 7 & 8) and the pressure gauge (3, Figures 7 & 8). Disconnect the M12
cable (7, Figures 5 & 6) from the pump. Any residual pressure in the system when opening or
disconnectin
g components may cause components to be thrown or lubricant to spray, causing
injury to people or damage to the environment.
Pressurised lubricant
The pressure in the pneumatic system must be regulated so that the
pressure at the pumping
centre cannot exceed 300 bar (4,350 psi/30 MPa) under any circumstances. A higher pressure
could damage the system components and cause injury to people or damage to the
environment.
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