Particularities Of The Manual/Automatic Mode - Lincoln Electric MODULO MD2 Safety Instruction For Use And Maintenance

PARTICULARITIES OF THE MANUAL/AUTOMATIC MODE

Manual mode :
When the switch (5) is moved to the manual position, the impeller operates continuously.
The green Impeller on button (4) shows that the extraction of the MODULO MD2 unit is in service
A service signal is available to put the network fan under the control of the extraction unit or units in service.
See "Wiring of printed circuit board inputs/outputs" on page 18
The impeller is stopped when the selection switch is brought back to the Stop position
Automatic mode :
In automatic mode, the impeller is started up by the welding current sensor or by an external function wired to the
printed circuit board of theMODULO MD2 extraction unit.
 dry contact to be wired at 1 & 3 of the printed circuit board,
see "Connecting the current clamp" on page 17
As soon as the arc is struck (or the external contact is sensed), the extraction system starts up.
When the electric arc stops, the impeller will stop after the set time (delay adjustable from 2 seconds to 9 minutes).
NB: If the selection switch is moved from the Automatic position to Stop, the impeller will not stop immediately, but
will apply the set stopping delay.
-20
Welding of short beads, tack welding or successive welding
operations must be carried out in Automatic mode to avoid the
impeller restarting with every arc strike. That allows the impeller to
cool down adequately and will prevent the accidental tripping of
thermal safety systems.
8695 8467 / C
MODULO MD2