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17
ELECTRICAL CONNECTION
CLIC STAND ALONE units can be ordered with standard multi-point power connections or with optional single-point connections and
various disconnect and circuit breaker options. Wiring inside the unit is sized in accordance with the NEC®.
The required field wiring varies depending on the configuration of the unit. Refer to page 19-22 for wiring diagram information. Voltage
limitations are:
1. Within 10 percent of nameplate rating.
2. Voltage unbalance must not exceed 2 percent. Since a voltage unbalance of 2% can cause a current unbalance of 6 to 10 times
the voltage unbalance per NEMA MG-1, it is important that phase-to-phase unbalance be kept to a minimum.
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DANGER
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Qualified and licensed electricians must perform wiring. There is an electrical shock hazard that can cause serious injury or death.
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DANGER
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LOCK OUT / DISCONNECT all power sources before starting, pressurizing, depressurizing or shutting down the chiller. Disconnect
electrical power before servicing equipment, including condenser fan motors or compressors. More than one disconnect may be
required to deenergize the unit. Failure to comply with this warning can result in serious injury or death. Be sure to read and under-
stand the installation, operating and service instructions in this manual.
Chiller electrical wiring connections may be made with either copper or aluminum wiring, provided the size and number of wires match
the chiller terminals. All wiring must be in accordance with applicable local and national codes, including NECA/AA 10402012 for
installation of aluminum wiring in buildings (ANSI).
Wiring inside the unit is sized in accordance with the NEC®. Refer to the unit nameplate and unit selection report for correct electrical
ratings.
1. The control transformer is supplied and no separate 115V power is required. For single and multipoint power connections, the con-
trol transformer is on circuit #1 with control power wired from there to circuit #2. For multipoint power, disconnecting power from
circuit #1 disconnects the control power from the unit.
2. The size of the wiring supplied to the control panel shall be in accordance with the field wiring diagram.
3. The single point power supply requires a single disconnect to supply electrical power to the unit. This power supply must have a
fuse or use a circuit breaker.
4. All field wiring terminal range values listed in the unit selection report apply to 75°C cable per NEC.
5. It must be grounded per national and local electrical codes.
USE WITH ON-SITE GENERATORS
Switching from site mains to generator power and vice versa requires the chiller to be off or the power to be disconnected for more than
five seconds to avoid sending out-of-phase voltage to the chiller.
A properly installed and fully synchronized automatic transfer switch must be used to transfer power if the chiller is operating under load.
Generator sizing
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WARNING
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The generator should be sized by an electrical engineer familiar with generator applications.
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CAUTION
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Static discharge during handling of the circuit boards can cause damage to the components. Use an antistatic strap before perform-
ing any main tenance work. Never unplug cables, circuit board terminal blocks or plugs while the panel is powered.
Electrical Data
