- 9 -
OPERATING BENEFITS
EFFICIENCY & RELIABILITY
Compressor Experience
D
More than 40 years of rotary screw experience and
dedicated technological advancements. Compressors
are UL listed.
D
Simply designed for high reliability with only two
rotating parts. No gears to fail.
D
Insured continuous oil flow to each compressor
through integral high efficiency oil separation for each
compressor.
D
Chillers use multiple rotary screw compressors for fail-
safe reliability and redundancy.
Energy Efficiency
D
Designed to provide the greatest amount of cooling for
the least kilowatt input over the entire operating range
of your building.
D
Delivers outstanding efficiency and total energy
savings through the utilization of economizer and
controller controlled staging producing greater
capacity with fewer compressors.
D
Maximized performance through computer matched
components and multiple compressors on a single
refrigerant circuit.
D
High efficiency oil recovery system guarantees
removal of oil carried over in the refrigerant and
maintains the heat exchangers at their maximum
efficiency at both full and part load.
Installation Ease
D
Side-by-side evaporator/condenser plus snug
arrangement of rotary screw compressors result in an
extremely compact work envelope.
D
Units feature optional split design to allow easy fit
through any standard commercial doorway.
D
Dramatic payback in reduced maintenance and
overhaul costs both in down time and in labor
expenditures.
D
Ease of troubleshooting through controller retention of
monitored functions.
D
Factory run tested.
Safety Code Compliance:
D
ASME Boiler and Pressure Vessel Code, Section VlIl
Division 1 "Unfired Pressure Vessels"
D
JKKP code
D
ASME Standard B31.5 Refrigeration Piping
D
ASHRAE Standard 15 Safety Code for Mechanical
Refrigeration
D
National Electric Code
D
IEEE
D
Optional PED
Refrigerant Compatibility
D
Designed to operate with environmentally safe and
economically smart HFC-134a with proven efficiency
and reliability.
D
Consult factory for use with new HFC refrigerants.
Control Flexibility
D
Controller-based with DDC (direct digital control)
features precise control over every aspect of
operation with built-in standard features that allow
extra energy savings on start-up and throughout the
life of your equipment.
D
Insured uniform compressor loading and optimal
energy efficiency through controller controls which
utilize pressure transducers to measure evaporator
and condenser pressure.
D
Lower energy costs resulting from automatic load
monitoring and increased accuracy and efficiency in
compressor staging.
D
Proactive control by controller that anticipates
problems and takes corrective action before they
occur. Controls will unload compressor(s) if head or
suction pressure approach limits. This will enable unit
to stay on the line while warning operator of potential
problems.
Computer Performance Ratings
Dunham-Bush WCFX-E Water Cooled Screw Flooded
Chillers are available from 70 to 1000 TR [246 to 3517
kW]. The vast number of combinations of heat
exchangers, compressors and motors make it impractical
to publish tabular ratings for each combination. A chiller
may be custom matched to certain building requirements
by your Dunham-Bush Sales Representatives utilizing the
WCFX-E Computer Selection Program. Data which can
be provided to you will include:
D
Chiller Capacity
D
kW Input
D
Evaporator and Condenser Water
D
Pressure Drop
D
Evaporator and Condenser Tube Water Velocities
D
Motor Electrical Data
D
Part-Load Performance
Contact our local Dunham-Bush Sales Representative to
discuss what Custom Solutions Dunham-Bush can offer
to solve your chiller selection questions.
Summary of Contents for WCFX-E Series
Page 27: ...27 TYPICAL WIRING SCHEMATIC Two Compressors Unit...
Page 28: ...28 TYPICAL WIRING SCHEMATIC...
Page 29: ...29 TYPICAL WIRING SCHEMATIC...
Page 30: ...30 TYPICAL WIRING SCHEMATIC...
Page 31: ...31 TYPICAL WIRING SCHEMATIC...
Page 36: ......
