AEC Econo-Cool Chillers - Manual (Page 26)

AEC Water Temperature Control Units Page 25
3-10 Making Electrical Connections
Economical Series systems are designed for three-phase voltage operation. Refer to the
unit nameplate for proper voltage and amperage requirements.
Make sure you provide a correctly sized and protected supply of electrical power to
the unit.
Important!
Refer to National Electric Code (NEC) Article 430-24 through 430-26
for proper feeder conductor and supply disconnect sizing.
Maintain a safe ground and disconnect the power supply before servicing the unit. A
qualified electrician should make electrical connections, and disconnect and lock out
electricity using OSHA 29CFR 1910.147 standards when you need a service call.
Check serial tag voltage and amperage requirements and make sure your electrical
service conforms before making any electrical connections. Total running amps for
Economical Series systems are listed on the nameplate. Customer connections can be
run to the supply terminals from either side of the unit. Make sure that all three phases
are wired correctly. If not wired properly, the unit will run backwards. Again, check
the unit nameplate for correct voltage and amperage.
!
DANGER
Improper electrical connections
can damage the unit and cause
serious operator injury or death!
Bring properly sized power leads and ground from a fused disconnect (installed by your
electrician) to the unit. Provide external overcurrent protection to the unit, using circuit
breakers or fuses. If you use fuses, make sure that they are dual-element time-delay
fuses, sized according to your electrical code. Make sure that all electrical connections
are tight.