Installation
46
The air pressure should be set to 80psi (5.5 bar) except when being used to supply an air-blast reject
device when the pressure should be set to 100psi (6.9 bar). The minimum air pressure must not fall
below 65psi (4.5 bar) when the reject operates.
Care should be taken when cutting the compressed air supply tube to length before fitting to
ensure that no particles enter the tube as this may cause damage to or prevent the high
precision air nozzles from operating correctly.
Connecting the Electrical Supplies
Connection of the machine to an electrical supply must only be carried out by suitably
trained and qualified personnel.
The supply voltage for the machine is indicated on the identification/rating plate that is mounted on
the frame. An electrical diagram is supplied with each machine to provide connection details.
The machine should have its own dedicated supply, unless the line supply is known to be clean. The
earth should be robust, of low impedance and noise free.
Any dedicated supply line should be run in its own conduit / trunking away from other noisy supplies.
The input voltage should not be subject to voltage fluctuations outside the limits (NWML0320):
■
Minus 15% to plus 10% of the nominal supply voltage (230V or 110V).
■
Zero voltage for more than 20mS.
■
50% of nominal voltage for more than 40mS.
■
80% of nominal voltage for more than 100mS.
Operation outside these limits may cause loss of function until the supply condition recovers to within
limits.
The standard metal detector conveyor is fitted with a starter isolator and a 24V ac control circuit. The
supply voltage for the conveyor is indicated on the identification plate that is mounted on the frame.
The following illustration shows the isolator inside a typical electrical services box
The Isolator Switch can be locked in the ‘OFF’ position using a padlock to prevent electrical
power being restored whilst carrying out servicing and maintenance activities.
To Next Page
Loading...
