Sterling 882.93092.01 Manual Do Utilizador

GP Series Portable Chillers

Chapter 3: Installation

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Figure 3: Typical GP20-50 Water Cooled Condenser Connections

Air-Cooled Chiller Condensers
Air-cooled chillers use the surrounding air to cool the condenser. Install the chiller in an area

where there is free passage of air for condensing and provisions for removal of heated air

from the area. Do not locate air-cooled chillers in locations where steam, hot air, or fume

exhausts can be drawn into the chiller.
Caution! Clean air-cooled condensers and filters frequently. Failure to do so results in

reduced capacity, increased operating costs, and possible failure of the

equipment. Cleaning instructions can be found in the Maintenance chapter of

this manual

Normal maximum refrigerant condensing pressure with 95ºF (35ºC) air entering the

condenser is 420 psi (2896 kPa).
Condensing Air Temperature. Our air-cooled portable chillers are designed to operate at a

minimum condenser entering air temperature of approximately 75ºF (24ºC). Operation of the

equipment at a lower condenser entering air temperature can cause the chiller to malfunction.

For entering air temperatures below 75ºF (24°C), an optional fan motor speed control is

available. We recommend maintaining a minimum 75ºF (24°C) ambient temperature.
Note:

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).