BeaconMedaes AGS 1560, Instruction Book

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Suction pipe with flow regulating valve

2

Exhaust pipe

3

Motor

4

Blower

5

Electric cabinet

6

Check valve

2.3

Electric motors

The type of electric motor fitted depends upon the exhauster unit model and may require either a single phase
or three phase electrical power supply. In addition to driving the impeller assembly, the electric motor also
drives its own cooling air flow over the cooling fins. The cooling air is ambient, drawn by the exhauster from
the plant room.

2.4

Control panel

•

The service diagrams shown in this section are given as example. Please use the Service
diagram delivered with the unit for up-to-date information.

•

For general information on the electronic vacuum switch (type used is PN7009), please
consult also the dedicated manual 2920 7089 50 on the CD, delivered with the AGS unit.
For the factory settings, see section 

Pressure switch

.

Simplex installation

The starter/isolator panel controls the operation of the exhauster unit and is mounted on a frame above the
exhauster unit. The panel is wired to both the electrical power supply and to the exhauster unit electric motor,
and provides facilities for the use of remote start switch panels. The panel isolation switch provides an
emergency isolation facility, which controls all electrical power to the exhauster unit, remote start switch
panels and system indication lights. A transformer is incorporated to provide a control circuit electrical power
supply at 24 V AC. A green POWER ON indicator (H1) is fitted to the starter/isolator panel and is illuminated
whenever power is available to the 24 V control and indication circuit.

The HAND/OFF/AUTO switch (S10) controls operation of the exhauster unit and provides continuous
operation when selected to HAND ("man"). When selected to AUTO, control of the exhauster unit is passed
to the remote start switch panels. Operation of any of the remote start switches activates the exhauster unit,
which will continue to run until all remote switches are selected OFF. A green RUNNING indicator (H2) is
fitted to the starter/isolator panel and is illuminated whenever the electrical power supply is available at the
exhauster unit.

The starter/isolator panel incorporates a thermal protection overload device (F21), which is selected to the
exhauster unit full load current rating. The thermal protection overload device also monitors the electrical
power supply and phase input. In the event of a fault, the overload device breaks the circuit to the exhauster
unit, which will not operate until the system is manually reset. Operation of the overload device also breaks
the circuit to the remote start switch panels, extinguishing the green RUNNING indicator. Once the fault has
been diagnosed and rectified, the overload can be reset within the panel.

Simplex and Duplex units incorporate a line pressure switch. This line pressure switch monitors the vacuum
level and provides an additional control of the remote start switch and starter/isolator panel green RUNNING
indicators.

Instruction book

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