Heatcraft DSV120BM6 User Manual
Air-Cooled Condensing Units
BN-SCUTB | March 2015
with Compact Screw Compressors
Technical Bulletin
Models SSV | DSV
Table of Contents
Nomenclature Chart ............................................................................................................................ 2
Introduction ......................................................................................................................................... 3
TM
Bitzer
Compressors ......................................................................................................................... 4
Magnum
TM
Microprocessor ................................................................................................................ 5
Condenser Features ........................................................................................................................... 6
Unit Features and Options .................................................................................................................. 7
Performance Data ............................................................................................................................... 8
Medium Temperature ............................................................................................................... 8-9
R-404A/R-507 ............................................................................................................. 8
R-407C ........................................................................................................................ 9
High Temperature ..................................................................................................................... 10
R-407C ........................................................................................................................ 10
Physical Data ...................................................................................................................................... 11
Dimensional Drawings ........................................................................................................................ 11
Electrical Data ..................................................................................................................................... 12-13
Nomenclature
S S V OOOB M 6 D
Number of Circuits Compressor
Style
S = Single S = Screw V= Vertical 050B – 50 M = Medium 6 = R-404A, D = 460/3/60
D = Dual 060B – 60 H = High R-507 E = 575/3/60
2
Airflow Horsepower Temp. Range Refrigerant
Type
070B – 70 7 = R-407c
080B – 80
090B – 90
100B - 100
110B - 110
125B - 125
140B - 140
Voltage
THE RIGHT CHOICE FOR LARGE COOLING APPLICATIONS
The screw compressor condensing unit is an important addition to the Heatcraft air-cooled condensing unit product
family, featuring innovative compact screw compressors and advanced microprocessor controls. The unit is designed
to provide increased system reliability, reduced installation and operation costs, as well as, improved product integrity
in commercial and industrial refrigeration applications.
Increased Reliability
The Heatcraft screw compressor condensing unit is a reliable and rugged system, designed for the commercial and industrial
refrigeration markets. Compact screw compressors have fewer moving parts than reciprocating compressors, resulting in improved
durability. Additionally, a semi-hermetic motor design eliminates shaft seal and coupling concerns, while an integral oil system
provides improved lubrication performance. The screw compressors utilize slide valve unloading which increases motor life through
unloaded compressor starting. The new screw condensing units are factory equipped with an advanced microprocessor control
system. This control system constantly monitors and adapts by modifying multiple parameters to guarantee safe and reliable
system performance. Finally, all screw compressor condensing units come standard with a floating tube condenser coil design,
minimizing the potential for refrigerant leaks.
Reduced Costs of Ownership
Screw compressor condensing units allow owners and
operators to reduce both their installation and operating
costs. Screw compressor condensing units yield more
capacity per compressor than traditional reciprocating
compressor condensing units. The result is a reduced
number of units on large projects and subsequent
savings of time and cost during installation and
commissioning. Built-in features such as soft starting,
slide valve unloading, and digital controls make Heatcraft
screw compressor condensing units the optimum choice
for maximum performance with minimal operating costs.
Improved Product Integrity
With advanced digital controls and variable capacity capability, the screw compressor condensing units have the capability to
maintain more precise temperature control and stable product environment. Minimizing temperature fluctuations results in maximum
product integrity; all while maintaining overall system performance. Screw compressor condensing units are the right choice and the
perfect match for large, mission critical cooling applications.
3
COMPACT SCREW COMPRESSORS : FEATURES AND BENEFITS
Compact Screw Compressors
The Bitzer CSH compact screw compressor is the result of
continuous development for a simplified, space and energy
efficient semi-hermetic screw compressor. Using state of the
art technology, this screw compressor is not only smooth
running, quiet, and efficient; but also meets the same stringent
performance and reliability benchmarks that have set the
industry standard.
Robust Design
The compact screw compressors feature a newly developed
efficient twin rotor geometry. The rotors are precisely located at
both ends by bearings that prevent radial and axial movement
reducing unit vibration. Rotors and housing are machined for
tight tolerances allowing optimum efficiency while preventing
wear. Compressors are constructed with a double wall rotor
casing for reduced sound transmission. Rotor and casing design,
in conjunction with oversized oil supply chambers, result in a
significantly more robust compressor.
Optimized Oil Management
The compact screw compressors are designed with an integral
three-stage oil separator and a 10-micron oil filter. Oil system also
includes an oil level control, oil level sight glass, crankcase oil
heater, and an oil service valve. The integral oil system reduces
the system piping complexity, and subsequently minimizes
potential leak points.
4
MICROPROCESSOR CONTROLLER: FEATURES AND BENEFITS
Magnum™ Microprocessor
The Magnum
temperatures improving product integrity. Advanced control algorithms provide for proper compressor control resulting in more efficient
operation and longer compressor life. The microprocessor is factory installed and features pre-loaded factory set points allowing for
faster startup and commissioning. Advanced diagnostic, monitoring, and data logging options assist in efficient trouble shooting should
an issue arise, minimizing costs and allowing quick system recovery.
TM
microprocessor control produces a more stable operating system resulting in precise process and product
Microprocessor monitors and controls:
n
Room temperature
n
Compressor Suction Temperature
n
Compressor Discharge Temperature
n
Compressor Suction Pressure
n
Compressor Discharge Pressure
n
Compressor Amps
n
Defrost Time Schedules
n
Defrost Termination (Electric Defrost Equipped Models)
n
Evaporator Fan Delay (Electric Defrost Equipped Models)
n
Evaporator Defrost Hold Out (Electric Defrost Equipped Models)
In addition, microprocessor controls:
n
Compressor Slide Valve
n
Compressor Unloaded Start
n
Condenser Fan Cycling
n
Pre-Start System Pumpdown
Finally, the MagnumTM monitors:
n
Ambient Temperature
n
Compressor Module
n
Phase Loss Monitor
n
Optical Oil Level Control
n
Compressor Run time
n
Compressor Cycles
n
Alarms and Error Codes
Magnum is a trademark of Micro Control Systems
5
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