Sterlco Upright High Temperature Heat Transfer - Manual (Page 18)

Upright Portable Hot Oil TCUs Chapter 3: Installation 18
3-3 Electrical Connections
These units are designed for three-phase voltage operation. Refer to the unit nameplate for
proper voltage and amperage requirements, and make sure your electrical service conforms.
Check the unit nameplate for correct voltage and amperage before making electrical
connections!
Caution!
1. Provide a correctly sized and protected power supply to the unit.
2. If an electrical supply disconnect is not installed as a factory option, the customer
is responsible to properly size and install a suitable disconnect.
3. Refer to National Electric Code (NEC) 430-24-26 for proper feed conductor and
supply disconnect sizing.
4. Voltages must be within plus or minus ten percent (±10%) of the nameplate rating.
5. Maintain a safe ground and disconnect the power supply before servicing the unit.
A qualified electrician should make electrical connections and disconnect the
electricity when service calls are needed.
• Locate disconnects in an easily accessible location. Operators should
not have to squeeze around the Upright unit to reach disconnects,
especially in case of emergency.
• When running conduit whips to the Upright unit, make sure that whips
are routed away from hot piping.
DANGER!
Improper electrical connections can cause damage to the unit and
cause serious operator injury or death! Make sure that ALL electrical
connections are made by a qualified electrician, and that ALL
connections are tight.
Make all electrical supply connections at the front of the unit. An access panel covers all
electrical connections. Run electrical connections to the supply terminals from either side of
the unit. Make sure that all three phases are wired correctly. The pump runs backwards if not
wired properly.