Function description
FAM 25/45/60/75/95
en(us)
Page 37/160
BEWA FAM25-95 3402054f en(us) 2013-06-13
2013-06-13
All of the functions on the SIMATIC panel can be selected, except for the regulation
of the vacuum pressure. The electrical control of the Siemens S7 series monitors
the functioning of the unit. Malfunction and error messages are displayed in plain
text in the correspondingly available national language. All E-STOP messages will
lead to a direct switch-off of the unit.
After the FAM is shut down using the control panel, the filling pump and the rotary
vane vacuum pump - together with its switching conveyor pump when a CS is
present - are also switched off.
Exception: If the heater is switched on, then a cooling phase of 60 seconds will
intervene during which the heater is first shut off. Afterwards, all of the pumps will be
switched off, except for the evacuation pump.
The evacuation pump runs until the "Min" fill level in the vacuum column is reached.
The run-down phase status is shown in the display
If the fill level "Min" in the vacuum column is reached, the power unit will be switched
off.
Power unit with water ring vacuum pump
With a special cooling system the air is cooled and partially dried within the water
ring vacuum pump. The resulting condensed water is fed to the operating water
using the water-operated vacuum pump.If more water is harvested than is
consumed by the vacuum pump (evaporates), then the excess water is drained
through the overflow valve into the condensate canister.
If less water is harvested than is consumed by the vacuum pump, it then the missing
amounts of water are automatically topped up either manually or via the automatic
water connection.
The water level is monitored by the integrated float switch of the water ring vacuum
pump.
Power unit with rotary vane vacuum pump
For versions with rotary vane vacuum pump, the water that is absorbed as water
vapor is expelled from the vacuum pump.