Advantage Sentra SK Series, Instruction Manual, Page: 45 / 70

Temperature Control Units : Sentra with VE Series Instrument
Page: 45
Advantage Engineering, Inc.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-0729 Fax: 317-881-1277
Service Department Fax: 317-885-8683
www.AdvantageEngineering.com
5.4 VOLTAGE CHANGE
A. Some units can undergo a field voltage conversion by qualified technicians. Consult with
the Advantage 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 field 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 qualified technician should follow this procedure to
complete a field 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
(figure 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 Sentra 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 (figure 5.4E).
Thermoformed panel
removed and electrical
cabinet open.
Figure 5.5B
Transformer
Motor Starter and Overload
Block
Figure 5.5A