Daikin Navigator WWV Installation, Operation And Maintenance Manual page 6

General Description
Daikin Navigator model WWV chillers are complete, self-
®
contained, automatically controlled, liquid-chilling units
featuring variable speed screw compressors. All model WWV
chillers are equipped with a single cooling circuit and single
compressor. Navigator ® chillers are designed for indoor
installation only. The chillers use refrigerant HFC-134a, with no
ozone depletion level.
The WWV is made up of a high efficiency, new variable volume
ratio (VVR ® ) series single screw compressor, flooded shell
and tube evaporator, and a shell and tube condenser. The
compressor is designed to operate in a very wide operating
range and ensure the best possible efficiency in each working
condition. In this regard, a sophisticated device dynamically
manages the VVR ® . This system ensures the optimum
position of the discharge ports as a function of the operating
compression ratio, choosing one among the four available
positions.
Variable Speed Chiller
Table 1: Operating Limits for WWV Chillers
Maximum mechanical room ambient temperature
During chiller operation
During chiller storage - with maximum non-condensable relative humidity of 95%
Evaporator outlet fluid temperature range
Evaporator outlet fluid temperature requiring glycol
Maximum fluid temperature in evaporator for startup
Condenser inlet fluid temperature range
Range of evaporator and condenser fluid temperature change across vessels
IOM 1264-1 • NAVIGATOR
®
NOMENCLATURE
W W V ### A XXX
Water-cooled
World
MODEL WWV CHILLERS
All the described components are managed by an innovative
microprocessor control system that optimizes operations by
monitoring all the machine operating parameters. A diagnostic
system helps the operator in identifying alarm and fault causes.
Only normal field connections such as water piping, electric
power, and control interlocks are required, thereby simplifying
installation and increasing reliability. Necessary equipment
protection and operating controls are included.
All Daikin Applied screw chillers must be commissioned by
a Daikin Applied service technician or an authorized service
provider. Failure to follow this startup procedure can affect the
equipment warranty (see "Receiving and Handling" on page
7).
The standard limited warranty on this equipment covers parts
that prove defective in material or workmanship. Specific
details of this warranty can be found in the warranty statement
at the back of this manual.
Circuit Configuration
Vintage
Compressor Size
113°F (45°C)
122°F (50°C)
26.6°F (-3°C) to 68°F (20°C)
< 40°F (4.4°C)
109.4° F (43°C)
60.8°F (16°C) to 130°F (54.4°C)
7.2°F (4°C) to 14.4°F (8°C)
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nTroduCTIon
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