AEC NEC Central Station Air and Water Cooled Chiller - Manual (Page 8)

NEC Series Water- and Air-Cooled Central Chillers Page 7
1 General Information
1-1 Introduction
AEC/Application Engineering NEC Series Central Water Chillers are available in water-cooled
(NECW) and remote air-cooled (NECR) designs. They differ only in the condensing media used.
NEC units can be configured with one, two, or three independent circuits using 10 to 60 hp
compressors for each circuit.
This manual describes single-circuit NEC units. References are made to multiple circuit units as
needed.
A properly installed, operated, and maintained NEC chiller will provide many years of reliable
operation. To get the most satisfaction from your new chiller, read and follow the
instructions in this manual.
1-2 Necessary Documents
These documents are necessary for the operation, installation, and maintenance of AEC/
Application Engineering NEC chillers. Additional copies are available from AEC, Inc.
Familiarize the appropriate personnel with the following documents:
• This manual.
• The schematic and connection diagram in the control enclosure.
• Operation and installation manuals for accessories and options selected by the customer.
• The Customer Parts List included in the information packet.
1-3 Models Covered
Model numbers are listed on the chiller serial tag. A Q following the model number indicates a
specially constructed unit; not all information in this manual may apply. Please know the model
number, serial number, and operating voltage of your chiller if you need to contact AEC, Inc.
NEC chiller models are designated by the number of refrigeration circuits, total compressor
horsepower of all circuits (10 through 180), and the cooling method used. Air-cooled models are
designated
NECR and water-cooled models are designated NECW . For example, a 3-circuit air-
cooled NEC with three 10 hp compressors is designated as NECR-3-30 .