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4.1.9.10 115V/230V Switch
This switch is factory set to allow a common PC board to be operated on either 115 vac, 50/60 hz or 230 vac,
50/60 hz. The printed circuit board operating voltage can only be switched after all electrical components
connected to it are changed. To field convert the control and sampler operating voltage, determine what
components will need to be replaced. Typically this includes, but is not limited to: the digital display timer, power
lamp & socket, fuse(s), solenoid coil(s), and possibly the motor. Refer to the name plate and wiring diagram on
the motor to determine if the motor is rated for the desired voltage. If it is, change the wiring connections in the
motor junction box for operation on the new voltage.
DANGER
THIS CONTROL IS TO BE OPERATED ONLY ON THE VOLTAGE DESIGNATED ON THE
CERTIFIED ELECTRICAL DRAWING! FIRE OR EXPLOSION MAY RESULT, WHICH CAN
CAUSE DEATH, SERIOUS INJURY, AND EXTENSIVE DAMAGE TO EQUIPMENT. DO NOT
CHANGE THE 115/230 VAC SWITCH SETTING WITHOUT CONSULTING INTERSYSTEMS.
4.2 Sampler Mounted Electrical Components
4.2.1 Limit Switch
This switch is actuated when the auger tube is in
its home position. Upon initiation of a sample
cycle the auger tube rotates the cam tripping the
limit switch. The normally closed contacts on the
limit switch close and power is supplied directly to
the clutch solenoid. When the limit switch is
actuated the opening of the normally closed
contacts removes power to the clutch solenoid
thus stopping the auger tube rotation.
Correct wiring termination is essential to proper
sampler operation. Refer to figure 4-3, it shows
the limit switch utilized on the GSS-U sampler
and the physical orientation of the proper wiring
connections.
4.2.2 Drive Motor
This motor drives the sample auger and auger tube rotation through a right angle gear reducer and two
independent sets of spur gears inside the drive housing. A label is located on the motor designating the correct
direction of rotation (reference Figure 1-1). Verify that the motor is turning the proper direction of rotation when
wiring the system. On initial setup, disconnect the motor from the gear reducer and test run the motor. This will
prevent damage to the clutch if the motor is run backwards.
NOTE:
DO NOT RUN THE MOTOR THE WRONG DIRECTION. EXTENSIVE DAMAGE TO THE SAMPLER
WILL RESULT.
FIGURE 4-3, LIMIT SWITCH CONNECTIONS
