Jet J-1230R, Operating Instructions And Parts Manual

Page: 15 / 48

15
6.4 Electrical Connections
Electrical set-up should be
performed only by a licensed electrician who
is familiar with national and local electrical
codes. This machine must be properly
grounded to help prevent electrical shock
and possible fatal injury.
Model J-1230R radial drills are tested before
shipping, for all functions and circuits under
electrical power specified for the machine and
motors. The only hook-up requirement should be
for correct connection to an appropriate cutout
on an appropriate service branch.
Where the following instructions do not agree
with local electrical codes and procedures, the
applicable codes and procedures should be
followed, exclusively.
Wiring diagram
A wiring diagram for the drill press is found
inside the door of the electrical cabinet. It is also
shown at the back of this manual. This diagram
is for reference by your licensed installing or
servicing electrician. In addition to using a
licensed electrician for connection to the drill
press service branch, the servicing of
components and circuits inside the control box
should be serviced only by a qualified
electrician. This includes fuse replacement, if
required. If any of these fuses, upon
replacement, should continue to fail at short
service intervals, the electrician should be asked
to check all machine components for excessive
loads, short circuits or other failures.
Electrical branch service
The machine is wired for either a 230V or 460V
3-phase service branch. The cable supplying the
drill press will be tagged with the voltage at
which the machine was tested and
corresponding to the customer's order.
If the tag has been lost, it will be necessary for
you to open the electrical cabinet on the rear of
the drill press and examine the connections on
the transformer found inside the box. The
transformer can be connected to either a 230 or
460 volt source and its taps are labeled for
voltage. By locating the source tap on the
transformer you will be able to determine the
branch voltage required.
A service disconnect is recommended. The use
of fuses or circuit breakers for each of the
voltage supply wires is required. Use fuses or
circuit breakers which are appropriate to the
voltage for the motor system delivered.
A positive cut-out/lock-out lever or rocker switch
should be located on the outside of the service
disconnect to allow the machine operator to
disconnect from the branch circuit when working
with tooling on the machine.
It is recommended that the 230 volt Drill Press
be connected to a dedicated 25 amp circuit with
a 25 amp circuit breaker or time delay fuse.
Connect the
460 volt drill press to a dedicated
15 amp circuit with 15 amp circuit breaker or
time delay fuse.
Local codes take precedence
over recommendations.
Connecting branch to drill press
1. Disconnect the service branch to the
machine by moving the lever or rocker
switch on the cutout box to OFF.
2. Connect the green wire (or green with white
trace) to the branch ground.
3. Connect the remaining three wires in the
cable (labeled R, S and T) to the three
power lines in the branch.
4. Turn the power to the machine ON at the
cutout box.
5. Turn the coolant switch (See Figure 10) to
the ON position.
Make sure there is
coolant in the flood coolant system
before operating the pump.
6. Observe the rotation through the glass atop
the pump. The shaft should be rotating in
the direction of the arrow cast into the pump
assembly. If the shaft is rotating the wrong
direction, the power leads need to be
switched. Correct as follows:
7. Disconnect power to the machine by turning
it off at the cutout box.
8. Reverse any two of the power lead
connections.
9. Repeat steps 4, 5, and 6, above, and you
should observe the pump shaft turning in the
proper direction. The electrical service to the
machine is now complete.