AEC Continuous Vacuum/Pressure Conveying Systems - Manual (Page 33)

Page 32 Single- and Dual-Blower Continuous Vacuum/Pressure Systems
Vacuum Unit Motor
If the control unit is mounted on the vacuum unit, the vacuum unit motor is pre-
wired to the control unit. If the control unit is remotely mounted, bring three
properly sized leads in conduit from the terminals in the small junction box on the
vacuum unit to the control unit.
Check for proper motor rotation direction. Reverse any two motor leads to
change direction.
Pressure Unit Motor
Bring three properly sized leads in conduit from the terminals in the small junction
box on the pressure unit to the control unit. Check for proper motor rotation
direction. Reverse any two motor leads to change direction.
Vacuum Solenoid Valves (Single Blower Units, SVP Models)
If the control unit is mounted on the vacuum unit, these valves are pre-wired. If the
control unit is remotely mounted, connect three 14-gauge 300V MTW wires and
bring them in conduit to the vacuum unit junction box.
High Vacuum Switch
If the control unit is mounted on the vacuum unit, this switch is pre-wired. If the
control unit is remotely mounted, connect two 14 gauge 300V MTW wires and
bring them in through the conduit to the vacuum unit junction box.
High Pressure Switch
Run two 14 gauge 300V MTW wires from the control unit to the junction box on
top of the pressure unit. For solid state control units, connect the wires in both the
control unit and junction box. For relay units, connect the wires as shown in the
electrical schematic included in your Customer Information Packet.
High Level Switch
Provision for a single high level switch at the material receiving point is standard.
Run two 14 gauge 300V MTW wires from the switch to the control unit on
conduit. Where optional switch-selectable high level sensors are present, refer to
the connection diagram enclosed with this manual for terminal numbers.
Cyclone High Level Sensor
Run two 14 gauge 300V MTW wires from the sensor to the control unit in conduit.
4-6 Testing the Rotary Airlock
Run the airlock motor and airlock, verifying that the airlock is turning in the proper
direction (See Figure 6). Measure the current draw with a clamp-on ammeter and
compare it with the rated draw on the motor nameplate.