Related Manuals for Danfoss DSN120
Summary of Contents for Danfoss DSN120
- Page 1 Application Guide Scroll compressors DSN120-150-180 Single and manifold, 50-60 Hz - R290 www.danfoss.com...
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Page 2: Table Of Contents
Performance data R290 50 Hz, Single compressor Tandem and trio performances Sound and vibration data Compressor sound radiation Mechanical vibrations Operating envelope data Operating envelope Dimensions Single compressors Tandem assemblies © Danfoss | Climate Solutions | 2025.01 AB501440792315en-000101 | 2... - Page 3 Ordering Compressor code numbers Single pack Industrial pack Accessories and spare parts Crankcase heaters Mounting hardware Lubricant Terminal boxes, covers and T-block connectors Acoustic hoods Miscellaneous Tandem kits Online support © Danfoss | Climate Solutions | 2025.01 AB501440792315en-000101 | 3...
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Page 4: Safety And Warnings
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. -
Page 5: Introduction
Introduction Product description Danfoss scroll compressor DSN for R290 is available as single and manifolding compressor. DSN series scroll compressor bene t from an improved design to achieve the highest e ciency and increased life time within chillers and heat pumps. -
Page 6: How Do Idvs Work
How do IDVs work? Figure 2: 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. -
Page 7: Product Identi Cation
Danfoss Ltd.,22 Wycombe END, HP9 1NB,GB Nomenclature Danfoss scroll compressor DSN for R290 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. -
Page 8: Compressors Serial Number
Scroll compressors, DSN120-150-180 | Product identi cation Compressors serial number 12345678 Year code 8 Digit serial number Month code Plant assembly line code Table 1: Serial number code legend table Year code Month code Plant assembly line code Year Code... -
Page 9: Certi Cates, Declarations, And Approvals
Contact Danfoss Declaration related to A3 Danfoss marks all compressors that are quali ed for A3 refrigerants with a sticker indicating the usage of such refrigerants. Systems using ammable refrigerants must be executed correctly while observing safety rules, as speci ed in corresponding safety standards such as, but not limited to EN 378. They must comply with any and all applicable legislation and regulations. -
Page 10: Refrigerants
R290 is categorized as an A3 refrigerant according to ISO817 classi cation Please refer to European regulation and directives about the use if refrigerant of the A3 safety group (EN378, EN60335). © Danfoss | Climate Solutions | 2025.01 AB501440792315en-000101 | 10... -
Page 11: Technical Speci Cation
Scroll compressors, DSN120-150-180 | Technical speci cation Technical speci cation 50-60 Hz data, Single compressor Table 7: 50-60 Hz data, Single compressor Swept volume Displacement (50 Hz) Displacement (60 Hz) Oil charge Net weight Model /rev cu.in/rev cu.ft/h cu.ft/h DSN120 11.10... -
Page 12: Performance Data
Scroll compressors, DSN120-150-180 | Performance data Performance data R290 50 Hz, Single compressor Table 8: 50 Hz R290 Single compressor Nominal tons Nominal cooling capacity Power input E.E.R. 60Hz Model Btu/h Btu/h/W DSN120 25400 86665 3.34 11.40 50hz DSN150 32100 109525 3.48... -
Page 13: Sound And Vibration Data
Scroll compressors, DSN120-150-180 | Sound and vibration data Sound and vibration data Typical sounds and vibrations in systems can be broken down into the following three categories: • Sound radiation (through air) • Mechanical vibrations (through parts and structure) • Gas pulsation (through refrigerant) The following sections focus on the causes and methods of mitigation for each of the above sources. -
Page 14: Operating Envelope Data
Scroll compressors, DSN120-150-180 | Operating envelope data Operating envelope data Operating envelope Figure 4: Operating envelope DSN120-150-180 Evaporating temperature (°F) Evaporating temperature (°C) Danfoss OE-000132 Figure 5: Minimum suction superheat Evaporating temperature (°C) Danfoss OE-000111 Higher suction superheat may lead to discharge temperature above 150°C for DSN with R290. -
Page 15: Pressure Settings
Scroll compressors, DSN120-150-180 | Operating envelope data Pressure settings Table 10: Pressure settings Pressure settings R290 Working range high side bar(g) 5.4 – 31.5 Working range low side bar(g) 0.7 – 8.5 Maximum high pressure safety switch setting bar(g) Minimum low pressure safety switch setting... -
Page 16: Dimensions
H (mm) H1 (mm) H2 (mm) H3 (mm) L1 (mm) L2 (mm) L3 (mm) L4 (mm) L5 (mm) number DSN120 244.45 99.5 190.5 190.5 8560304 DSN150-180 244.45 99.5 190.5 190.5 8560308 © Danfoss | Climate Solutions | 2025.01 AB501440792315en-000101 | 16... -
Page 17: Tandem Assemblies
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 © Danfoss | Climate Solutions | 2025.01 AB501440792315en-000101 | 17... -
Page 18: Mechanical Connections
The grommets must be compressed until contact between the at washer and the steel mounting sleeve is established. The required bolt size for the DSN120-150-180 compressors is HM8-40. This bolt must be tightened to a torque of 15Nm. -
Page 19: Design Piping
Scroll compressors, DSN120-150-180 | Mechanical connections Figure 9: Rubber grommets Tightening torque 15 Nm HM 8 bolt (4 pcs) Lock washer (4 pcs) Flat washer (4 pcs) Steel mounting sleeve (4 pcs) Rubber grommet (4 pcs) Nut (4 pcs) Part 2, 3, 4, 5, 6 and 7 are delivered along with... - Page 20 Scroll compressors, DSN120-150-180 | Mechanical connections Ensure adequate oil return, even under minimum load conditions (refrigerant speed, piping slopes…). For validation tests see section Manage oil in the circuit. Avoid condensed liquid refrigerant from draining back to the compressor when stopped (discharge piping upper loop).
- Page 21 Scroll compressors, DSN120-150-180 | Mechanical connections The discharge line has no impact on oil balancing. It is shown with tee, to indicate that both left and right side discharge headers are possible. By default, DSN tandems are not factory-built. To complete an assembly in the eld, you will need: •...
- Page 22 The oil equalization port is designed with outer shape for thread tightening and inner shape for brazed piping connection. The painted nut provided by Danfoss with compressor together is recommended to be tightened back after piping brazing nish as rust resistance solution of the outer thread. Otherwise, varnish for piping connection as required in the section of piping assembly need also cover the thread.
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Page 23: Electrical Connections
Terminal box Ø 29mm (φ1.14inch) knockout Ø 25.5mm (φ1inch) knockout Power supply Electrical speci cations Motor voltage Danfoss scroll compressors DSN are available in motor voltage listed below. Table 14: Motor voltage Frequency Motor voltage code Code 4 50 Hz... -
Page 24: Three Phase Electrical Characteristics
Scroll compressors, DSN120-150-180 | Electrical connections Vavg Mean voltage of phases 1, 2, 3. V1-2 Voltage between phases 1 and 2. V1-3 Voltage between phases 1 and 3. V2-3 Voltage between phases 2 and 3. IP rating The compressor terminal box according to IEC60529 is IP54 for all models when correctly sized IP54 rated cable glands are used. -
Page 25: Motor Protection
Motor protection DSN120 to DSN180 Compressor models DSN120 to 180 are provided with internal overload motor protection to prevent against excessive current and temperature caused by overloading, low refrigerant ow or phase loss. The protector is located in star point of motor and, should it be activated, will cut out all three phases. It will be reset automatically. -
Page 26: Application
This discharge gas temperature must not exceed 150°C for DSN (section Discharge temperature protection). Figure 16: Operating envelope DSN120-150-180 Evaporating temperature (°F) Evaporating temperature (°C) Danfoss OE-000132 Figure 17: Minimum suction superheat Evaporating temperature (°C) Danfoss OE-000111 © Danfoss | Climate Solutions | 2025.01 AB501440792315en-000101 | 26... -
Page 27: Discharge Temperature Protection
No risk of operation beyond the application envelope. No DGT protection required. DSN120 to DSN180 have no integrated discharge temperature protection, an external protection is required. Continuous operations beyond the compressor’s operating range will cause serious damage to the compressor. -
Page 28: Manage Sound And Vibration
We can consider two means to reduce compressors sound radiations: Acoustic hoods are quick and easy to install and do not increase the overall size of the compressors. Acoustic hoods are available from Danfoss as accessories. Refer to the tables above for sound levels, attenuation and code numbers. -
Page 29: Manage Oil In The Circuit
Scroll compressors, DSN120-150-180 | Application To ensure minimum vibrations transmission to the structure, strictly follow Danfoss mounting requirements (mounting feet, rails etc..). For further information on mounting requirements, please refer to section Design compressor mounting. Ensure that there is no direct contact (without insulation) between vibrating components and structure. - Page 30 Dilu- frost logic can be worked tion Chart. (see graph below) out to limit liquid ood- back e ect. (for more de- tails see Control logic). Add a suction accumulator © Danfoss | Climate Solutions | 2025.01 AB501440792315en-000101 | 30...
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Page 31: Manage O Cycle Migration
Figure 21: Placing oil temperature sensor on the bottom of the baseplate Oil temperature sensor must be placed on the bottom of the baseplate. Danfoss MG-000013 Dilution Chart - DSN120 to DSN180, R290 Figure 22: Dilution Chart (reference at 20 °C / 68 °F ambient temperature) Evaporating Temperature (°F) 22.5 40.5... - Page 32 Ensure correct electrical and mechanical installation. The surface sump heater are designed to protect the compressor against o -cycle migration of refrigerant. For DSN120-180, the surface sump heater is located on the compressor shell. For better standby energy consumption, Danfoss provides 65W crankcase heater.
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Page 33: Power Supply And Electrical Protection
Requirements • Protect the compressor from short circuit and overcurrent by a thermal magnetic motor circuit breaker set to Max. operating current or lower (see table in section Three phase electrical characteristics). For DSN120-180, phase sequence protection is strongly recommended. -
Page 34: Control Logic
Cycle rate limit requirements Danfoss requires a minimum compressor running time of 2 minutes to ensure proper oil return and su cient motor cooling. Additionally, compressor must not exceed 12 starts per hour. 12 starts per hour must not be considered as an average, this is the maximum number of starts acceptable to keep a good regulation accuracy during low load. -
Page 35: Reduce Moisture In The System
Manage superheat Manage superheat Manage operating Manage operating envelope. envelope. Reduce moisture in the system Excessive air and moisture © Danfoss | Climate Solutions | 2025.01 AB501440792315en-000101 | 35... -
Page 36: Assembly Line Procedure
• driers water content capacity • system refrigeration capacity • system refrigerant charge For new installations with DSN compressors with polyolester oil, Danfoss recommends using the Danfoss DML (100% molecular sieve) solid core lter drier. Assembly line procedure Compressor storage Store the compressor not exposed to rain, corrosive or ammable atmosphere between -35 °C (-31 °F) and 70 °C... -
Page 37: Piping Assembly
Figure 29: Incorrect Figure 30: Handling Slings Spreader bars Frame Piping assembly Good practices for piping assembly is a pre-requisite to ensure compressor life time (system cleanliness, brazing procedure etc.) © Danfoss | Climate Solutions | 2025.01 AB501440792315en-000101 | 37... - Page 38 A typical content of 45% Ag (Silver) is recommended by Danfoss. The use of self- ux alloys (as phosphorous alloys) is not recommended by Danfoss. This type of brazing require a higher working temperature, that may overheat the connectors, damaging the thin layer of copper, resulting in phosphides creation and joint zone embrittlement.
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Page 39: Vacuum Evacuation And Moisture Removal
Do not use a megohm meter nor apply power to the compressor while it is under vacuum as this may cause internal damage. © Danfoss | Climate Solutions | 2025.01 AB501440792315en-000101 | 39... -
Page 40: Commissioning
If Oil Top-up is needed, it must be done while the compressor is idle. Use the schrader connector or any other accessible connector on the compressor suction line. Always use original Danfoss POE oil 160SZ from new cans. For more detailed information see “Lubricants lling in instructions for Danfoss Commercial Compressors”... -
Page 41: Packaging
DSN120 1150 45.3 37.4 30.3 1383 DSN150 1150 45.3 37.4 30.9 1453 DSN180 1150 45.3 37.4 30.9 1453 Number of compressors per pack. Number of compressors per pack. © Danfoss | Climate Solutions | 2025.01 AB501440792315en-000101 | 41... -
Page 42: Ordering
Scroll compressors, DSN120-150-180 | Ordering Ordering Compressor code numbers Danfoss scroll compressors DSN can be ordered in either industrial packs or in single packs. Please use the code numbers from below tables for ordering. Single pack Table 29: Single pack Code no. -
Page 43: Accessories And Spare Parts
Scroll compressors, DSN120-150-180 | Accessories and spare parts Accessories and spare parts Crankcase heaters Table 31: Crankcase heaters Code no. Description Application Packaging Pack size 120Z0038 Belt type crankcase heater,65W,230V,CE and UL DSN all models Multipack 120Z0039 Belt type crankcase heater,65W,400V,CE and UL... -
Page 44: Acoustic Hoods
Scroll compressors, DSN120-150-180 | Accessories and spare parts Acoustic hoods Table 35: Acoustic hoods Code no. Description Application Packaging Pack Size 120Z0935 Acoustic hood DSN120 DSN120 Single pack 120Z0936 Acoustic hood DSN150/180 DSN150-180 Single pack Miscellaneous Table 36: Miscellaneous Code no. -
Page 45: Online Support
Online support Danfoss o ers a wide range of support along with our products, including digital product information, software, mobile apps, and expert guidance. See the possibilities below. The Danfoss Product Store The Danfoss Product Store is your one-stop shop for everything product related—no matter where you are in the world or what area of the cooling industry you work in.
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