Temperature Control Units : MFC with G Series Instrument
Page: 59
Milacron Process Support Business
4165 Halfacre Road Batavia, Ohio 45103
Phone: 513-536-2584
www.milacron.com
5.4 VOLTAGE CHANGE
A. Some units can undergo a eld voltage conversion by qualied technicians. Consult with
the Service Department to determine if your unit can be converted. Have your Serial
Number ready and call 317-887-0729.
B. Typical Conversions for 1/2 to 7.5 horsepower motors and 10 to 16 kW heaters:
1. 240/3/60 to 480/3/60
2. 480/3/60 to 240/3/60
3. 480/3/60 to 208/3/60
Consult factory for other power conversions.
C. For a eld voltage changeover, the following items will
require replacement or rewiring:
1. Heater (rewiring)
2. Motor (rewiring)
3. Transformer (rewiring)
4. Motor starter and overload block (replace)
5. Replace unit data tag with tag stating new
voltage and amp rating.
D. The qualied technician should follow this procedure to
complete a eld voltage changeover:
1. Disengage operations and verify all system
pressure is relieved and the unit’s pressure
gauges read “0”.
2. Disengage main power supply. Follow proper
lock-out procedures. The operator must verify
the Power light on the display is “off”.
3. Remove the lift-off access panel and set aside
(gure 5.4B).
4. Rewire the heater to the new voltage. Figure
5.4C shows the wiring for 230 and 460 volt
heaters.
5. Remove the thermoformed front panel and open
the electrical cabinet panel door. Unplug the
instrument connectors to fully extend the hinged panel.
6. Rewire the pump motor for the new voltage. Most pump motors are dual voltage.
Figure 5.5D shows the wiring schematic for 240 and 480 voltages.
7. Rewire the transformer to the proper voltages as shown by the schematic on the
transformer (gure 5.4E).
Thermoformed panel
removed and electrical
cabinet open.
Figure 5.5B
Transformer
Motor Starter and Overload
Block
Figure 5.5A
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