IOM 1202 3
Introduction
Introduction
Figure 1: Model Nomenclature
S = Standard Efficiency
H = High Efficiency
A
W S XXX C D SE
Air-Cooled
World Product
Screw Compressor
Nominal Tons
D = Dual Compressor
Design Vintage
T = Triple Compressor
P = Premium Efficiency
E = Standard Packaged
M = Remote Evaporator
General Description
Daikin Pathfinder™ air-cooled chillers are complete, self-
contained chillers that include the latest in engineered
components arranged to provide a compact and efficient unit.
Each unit is completely assembled, factory wired, evacuated,
charged, tested and comes complete and ready for installation.
Each of two circuits consists of an air-cooled condenser
section with an integral subcooler section, a semi-hermetic,
single-screw compressor with starter, a multi-circuit, shell-
and-tube, direct expansion evaporator, an economizer and
complete refrigerant piping. Each compressor has an
independent refrigeration circuit. Liquid line components
included are a manual liquid line shutoff valve, charging port,
filter-drier, sight-glass/moisture indicator, and electronic
expansion valve. A combination discharge check and shutoff
valve is included and a compressor suction shutoff valve is
optional. Other features include compressor heaters,
evaporator heaters for freeze protection, automatic, one-time
pumpdown of each refrigerant circuit upon circuit shutdown,
and an advanced fully integrated microprocessor control
system.
Pathfinder units
are available as s
tandard efficiency
(CDS) or
high efficiency (CDH) or premium efficiency (CDP). A high
ambient option is required for operation in ambient
temperatures above 100°F (37.8°C) and up to 125°F (51.7°C)
and when the VFD low ambient option is selected.
Information on the operation of the unit MicroTech
®
III
controller can be found starting on page 86.
Remote Evaporator Models
For enhanced application flexibility, AWS non-VFDand VFD
models are also available as
remote evaporator models.
Information on remote evaporator units can be found in the
IM 1203 manual, available on www.DaikinApplied.com.
Inspec
tion
When the equipment is received, carefully check all items
against the bill of lading to verify for a complete shipment.
Check all units for damage upon arrival. All shipping damage
must be reported to the carrier and a claim must be filed with
the carrier. Check the unit’s serial plate before unloading the
unit to be sure that it agrees with the power supply available.
Physical
damage to a unit after shipment is not Daikin
Applied’s responsibility.
No
te: Unit shipping
and operating weights are shown in
the
Lifting and Mounting section beginning on page 15.
Table 1: Operating Limits
Maximum standby ambient temperature 130°F (54.4°C)
Maximum operating ambient temperature 100°F (37.8°C)
with optional high ambient package (see detailed information in Cat 623) 125°F (
52°C)
Minimum operating ambient temperature (standard control) 35°F (2°C)
Minimum operating ambient temperature (with optiona
l low-ambient control) 0°F (-18°C)
Leaving chilled water temperature [NOTE: 60°F (15.6°C) with VFD and Red
uced Amp Limit] 40°F to 70°F (4.4°C to 21.1°C)
Leaving chilled fluid temperatures (with anti-freeze)
- Unloading is not permitted with fluid leaving
temperatures below 30°F (-1°C). [NOTE: 60°F (15.6°C) with VFD and Reduced Amp Limit]
20°F to 70°F (-6.7°C to 21.1°C)
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