Scroll compressors, DSF090 to DSF530 | Safety and warnings
Safety and warnings
Danfoss compressors are designed and manufactured according to the state of the art and to valid European and US
regulations. Particular emphasis has been placed on safety and reliability. Related instructions are highlighted with
the following icons:
This icon indicates instructions to avoid safety risk.
This icon indicates instructions to avoid reliability risk.
The purpose of this guideline is to help customers qualify compressors in the unit. You are strongly advise to follow
these instructions. For any deviation from the guidelines, please contact Danfoss Technical Support. In any case,
Danfoss accepts no liability as a result of the improper integration of the compressor into the unit by the system
manufacturer.
Scroll compressors, DSF090 to DSF530 | Introduction
Cut away DSF 270-530
Figure 2: Cut Away DSF 270-530
How do IDVs work?
Figure 3: Intermediate Discharge Valve (IDV)
Danfoss Intermediate Discharge Valves (IDVs) are located close to the discharge side of the compressor. They reduce
excessive compression of refrigerant under part-load conditions while maintaining the same cooling capacity. The
IDVs open when discharge pressure falls below the built-in optimization point. They adapt the eort of the motor to
the varying load and pressure conditions in the system, thus reducing the eort of the motor and its electrical
consumption and improving the system’s seasonal energy eciency.
Scroll compressors, DSF090 to DSF530 | Product identication
Product identication
Name Plate
Figure 4: Name Plate
Nomenclature
Danfoss scroll compressor DSF for R32 is available as single compressor and can be assembled in tandem or trio
combinations. The example below presents the compressor nomenclature which equals the technical reference as
shown on the compressor nameplate. Code numbers for ordering are listed in section Ordering.
Scroll compressors, DSF090 to DSF530 | Certicates, declarations, and approvals
Certicates, declarations, and approvals
DSF scroll compressors comply with the following approvals and certicates.
Certicates are listed on: Documentation for Commercial Compressor | Danfoss
R32 is a pure HFC refrigerant with a zero Ozone Depletion Potential (ODP=0) and a low Global Warming Potential
(GWP: 677/AR5; 675/AR4).
R32 leads to higher discharge temperatures than R410A but it oers higher cooling capacities and better eciencies
compared to R410A.
R32 is classied A2L with low ammability properties. Please refer to European regulations and directives about the
use of refrigerant of the A2L safety group (EN378, EN60335). Outside Europe refer to the local regulation
Scroll compressors, DSF090 to DSF530 | Performance data
Performance data
R32 50-60 Hz, Single compressor
Table 8: 50-60 Hz R32, Single compressor
NOTE:
TR: Ton of Refrigeration,
COP: Coecient Of Performance
EER: Energy Eciency Ratio
Standard rating conditions for 50Hz: Evaporating temperature: 5°C (41°F), Condensing temperature: 50°C (122°F),
Superheat: 10K (18°F), Subcooling: 0K (0°F)
Standard rating conditions for 60Hz: Evaporating temperature: 7.2°C (45°F), Condensing temperature: 54.4°C (130°F),
Superheat: 11.1K (20°F), Subcooling: 8.3K (15°F)
Subject to modication without prior notication.
Data given for motor code 4 compressor with above conditions
For regular updates and detailed capacities, please refer to Coolselector®2.
Tandem and trio performances
The impact of manifolding on compressor performances depends widely of the customer system itself. Therefore, it
would be unrealistic to provide data that corresponds accurately to a particular system. In rst approach, to support
compressors selection at full load, the manifold performances can be considered as the sum of capacities of the
compressors composing the manifold. For better accuracy, the customer should integrate the appropriate weighing
coecients according to his system very pressure drops and part load levels.
Scroll compressors, DSF090 to DSF530 | Sound and vibration data
Mechanical vibrations
A compressor generates some vibrations that propagate into the surrounding parts and structure. The vibration
level of a DSF compressor alone does not exceed 120 µm peak to peak for DSF090 to DSF200, and 154um peak to
peak for DSF270 to DSF530.. However, when system structure natural frequencies are close to running frequency,
vibrations are amplied due to resonance phenomenon.
A high vibration level is damageable for piping reliability and generates high sound levels.
Tandems to be achieved by assembly of individual compressors.
By convention, the last letter of tandems designation have been set to help to discern easily which type of manifold
we are considering.
U : Uneven tandem
E : Even tandem
X: Crossplatfom (medium-large) tandem