Sterlco GP Series 20-60 HP Packaged Chillers - Manual (Page 19)

GP Series Portable Chillers Chapter 3: Installation 19 of 93
Chapter 3: Installation
3-1 Uncrating
All models are shipped mounted on a skid, enclosed in a plastic wrapper, and open-crated on
all four sides and top.
1. Pry the crating away from the skid.
2. Use a pry bar to remove the blocks securing the unit to the skid.
3. Lift unit from sides, inserting forklift under the base. The forks must be equidistant
from the centerline of the unit and the unit must be balanced on the forks. Lift slowly
and only high enough to clear the skid. Use a pry bar if necessary to carefully remove
the skid from the unit.
4. Lower slowly. The unit should land on its casters or rails and can then be moved into
position.
5. Retain the crating material for reshipping the chiller in case hidden shipping damage
is found.
3-2 Electrical Connections
Supply electricity of the voltage, phase, and cycle listed on the serial tag. Total running amps
are also found in the specification tables on pages in the Appendix.
Bring properly sized power leads and ground from a fused disconnect (installed by your
electrician) to the unit. Use dual-element fuses in the disconnect switch, sized according to
the National Electrical Code recommendations. Make sure all electrical connections are tight.
For all chillers manufactured with Variable Frequency Drives the
voltage may vary up to 10% from the converter nominal voltage.
However, the phase-to-phase input voltage imbalance must not
exceed 3%. If the input voltage does have an imbalance from phase
to phase greater than 3% then a line reactor must be installed to
prevent faults within the VFD.
For remote condenser units, the maximum recommended motor
cable length between the VFD and the motor without output chokes
is 30 m (100 ft). With output chokes the motor cable length may be
extended to 65 m (195 ft).
!
Refer to your local electrical requirements for proper feeder conductor and supply
disconnecting sizing. For instance, in the United States refer to National Electric Code
(NEC) Article 430-24 through 430-26, Table 310.15(B)(2)(a)