Sterlco SEU Series Economical Water TCU - Manual (Page 23)

WTR1-600 Chapter 3: Installation 23 of 42
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 Local Electric Codes
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.
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.
Important!
1. Electrical connections must comply with all applicable electrical codes.
2. The temperature control unit must be grounded in accordance with local standards
and codes.
3. Voltage must be within plus or minus ten percent (±10%) of the nameplate rating.
4. Make sure your installer provides external protection.