Related Manuals for Danfoss MLM116
Summary of Contents for Danfoss MLM116
- Page 1 Application guidelines Danfoss Scroll for Refrigeration MLM/MLZ116 50Hz - R404A - R22 http://cc.danfoss.com...
- Page 3 Application Guidelines Content Single compressors ......................4 Manifold compressors .......................39 FRCC.PC.035.A5.02...
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Page 4: Table Of Contents
Application Guidelines Content Single compressors Features ..........................6 Scroll compression principle ....................7 The scroll compression process................................7 Compressor model designation ..................8 Nomenclature ......................................8 Label ..........................................8 Serial number.......................................8 Technical specifications ...................... 9 50 Hz ..........................................9 Dimensions ........................10 MLM/MLZ116 ......................................10 Suction and discharge connections .............................. - Page 5 Application Guidelines Content Single compressors Installation ......................... 31 System cleanliness ....................................31 Compressor handling and storage..............................31 Compressor mounting ..................................32 Compressor holding charge ................................32 Tube brazing procedure ..................................32 Brazing material ....................................... 32 Vacuum evacuation and moisture removal ........................... 33 Liquid line filter driers ....................................
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Page 6: Features
Features Single compressors With its unique scroll design and manufacturing This new medium-temperature scroll compressor process flexibility, the new Danfoss scroll for is designed for commercial refrigeration refrigeration, MLZ/MLM116 offers a highly applications and extends Danfoss’ refrigeration efficient solution for demanding refrigeration compressors to 26.8 kW (15 HP) at common... -
Page 7: Scroll Compression Principle
SUCTION COMPRESSION DISCHARGE Danfoss scroll compressors are manufactured high standards of reliability and process control using the most advanced machining, assembly were first priority. The result is a highly efficient and process control techniques. In the design... -
Page 8: Compressor Model Designation
Application Guidelines Compressor model designation Single compressors Nomenclature Type Size Motor Features M LZ T 4 B Application Other features M: medium temperature refrigeration Oil equali- LP gauge Oil sight Gas equali- zation drain port glass zation port Threaded Threaded Schrader Schrader None Family, Refrigerant &... -
Page 9: Technical Specifications
Efficiency Nominal Power Net weight Swept volume Displacement Oil charge cooling capacity input (with oil) Model Btu/h Btu/h/W cm3/rev m3/h Litres MLM116 24451 83427 10789 2.27 7.73 249.9 43.5 MLZ116 26865 91664 12127 2.22 7.56 249.9 43.5 Note: EN12900 conditions: To= -10°C, Tc= 45°C, RGT= 20°C, SC= 0K... -
Page 10: Dimensions
Application Guidelines Dimensions Single compressors MLM/MLZ116 Brazed connection-MLZ/MLM116 T4BC5 Rotolock connection-MLZ/MLM116 T4QC5 Discharge Discharge 1"1/8 1"1/8 Ø 266 Ø 266 Ø 257.4 Suction Ø 257.4 Suction 1"5/8 1"5/8 531±1.2 531±1.2 Oil sight glass 301.5 301.5 92.5 76.6 76.6 (29.5)/Without compression (29.5)/Without compression... -
Page 11: Suction And Discharge Connections
1"3/4 1"1/8 120Z0364 Oil sight glass Danfoss MLZ/MLM116 scroll compressors come equipped with a sight glass (1"1/8 - 18 UNF) which may be used to determine the amount and condition of the oil contained within the sump. Oil equalization connection MLM/MLZ116: 2”1/4 Rotolock connector allowing... -
Page 12: Electrical Data, Connections And Wiring
Any compressor damage related to this is installed in an enclosure, precautions must will not be covered by the Danfoss warranty. In be taken to avoid the temperature around the the same manner, cables must be selected in a... -
Page 13: Three Phase Electrical Characteristics
25°C, the measured resistance must be corrected using following formula: Danfoss MCI soft-start The inrush current for the Danfoss MLM/MLM116 3-phase AC motors; they can reduce the inrush controller compressors with motor code 4 current by up to 40%, thereby eliminating the... - Page 14 Application Guidelines Electrical data, connections and wiring Single compressors Input controlled soft start When the control voltage is applied to A1 - A2, the MCI soft starter will start the motor, according to the settings of the ramp-up time and initial torque adjustments. When the control voltage is switched off, the motor will switch off instantaneously.
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Page 15: Suggested Wiring Diagrams Logic
Application Guidelines Electrical data, connections and wiring Single compressors Suggested wiring diagrams logic MLM/MLZ116 Wiring diagram with pump-down cycle Wiring diagram without pump-down cycle Legend Fuses ....................F1 Liquid line solenoid valve ............LLSV Compressor contactor ..............KM Discharge gas thermostat/thermistor........DGT Control relay ................... - Page 16 Application Guidelines Electrical data, connections and wiring Single compressors Phase sequence and reverse Use a phase meter to establish the phase direction, and the motor is wound so that if the rotation protection orders and connect line phases L1, L2 and L3 connections are correct, the rotation will also be to terminals T1, T2 and T3, respectively.
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Page 17: Approvals And Certifications
Application Guidelines Approvals and certifications Single compressors Internal free volume Products Internal free volume at LP side without oil (liter) Internal free volume at LP side with oil (liter) MLM/MLZ116 28.8 22.1 FRCC.PC.035.A5.02... -
Page 18: Operating Conditions
Application Guidelines Operating conditions Single compressors • Refrigerant and lubricants The scroll compressor application range is • Motor supply influenced by several parameters which need to • Compressor ambient temperature be monitored for a safe and reliable operation. • Application envelope (evaporating These parameters and the main recommendations for good practice and safety temperature, condensing temperature, return... -
Page 19: Motor Supply
Application Guidelines Operating conditions Single compressors Motor supply MLZ/MLM scroll compressors can be operated at voltage ranges. In case of risk of under-voltage nominal voltages as indicated in the table in the operation, special attention must be paid to section “Motor voltage”. Under-voltage and over- current draw. - Page 20 Application Guidelines Operating conditions Single compressors MLM 116 - R22 Superheat: 10 K RGT: 20°C Evaporating temperature (°C) FRCC.PC.035.A5.02...
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Page 21: Maximum Discharge Gas Temperature
DGT compressor! protection is required (n°1) and where it is not (n°2). A DGT accessory is available from Danfoss: refer to section “Spare parts & accessories”. MLZ116 Superheat: 10 K Example 1 RGT: +20°C... -
Page 22: High And Low Pressure Protection
Note that the oil return may vary since it out is recommended. depends upon system design. The system must be designed in a way that Danfoss recommends a restart delay timer to provides a minimum compressor running time limit compressor cycling. Defrost cycle... -
Page 23: System Design Recommendations
Application Guidelines System design recommendations Single compressors General Successful application of scroll compressors beyond the limits given in this manual. Poor is dependent on careful selection of the performance, reduced reliability, or both may compressor for the application. If the compressor result. -
Page 24: Refrigerant Charge Limit
System design must be accumulator will be essential to ensure that the such that the amount of liquid refrigerant in the system runs reliably. Please contact Danfoss for compressor is limited. In this respect, follow the any deviation from these guidelines. - Page 25 Start the compressor for 1 second, Surface sump heater accessories are available then wait for 1 to 2 minutes. This operation must from Danfoss (see section "Accessories"). be repeated for each compressor individually: Compressor 1 Compressor 2 Compressor 3...
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Page 26: Liquid Flood Back
Normally this should not be less than of the system. For MLZ/MLM116 application, 50% of the system charge. If possible, this value suction accumulator is mandatory to use. -
Page 27: Specific Application Recommendations
Several possible solutions are discharge line. available to prevent the risk of compressor to For further information, please contact Danfoss. vacuum and low pressure differential between the suction and discharge pressures. Scroll and reciprocating... -
Page 28: Low Load Operations
Application Guidelines Specific application recommendations Single compressors Low load operations The compressor should be run for a minimum that the motor receives enough cooling under period to ensure that the oil has sufficient time conditions of lowest refrigerant mass flow. to properly return to the compressor sump and Brazed plate A brazed plate heat exchanger needs very... -
Page 29: Sound And Vibration Management
Sound levels are at rated (medium temperature) the sound level when a compressor is running. conditions. 50 Hz Model Sound power (dBA) MLM116 MLZ116 Stopping sound level MLZ/MLM have a unique discharge valve design that minimizes stopping noise. This results in very low shutdown sound. -
Page 30: Mechanical Vibrations
Application Guidelines Sound and vibration management Single compressors Mechanical vibrations Vibration isolation constitutes the primary In addition, it is extremely important that the method for controlling structural vibration. frame supporting the mounted compressor be MLZ/MLM scroll compressors are designed to of sufficient mass and stiffness to help dampen produce minimal vibration during operations. -
Page 31: Installation
Many of these • Moisture and air. contaminants are small enough to pass through a Compressor handling and Each Danfoss MLM/MLZ116 scroll compressor When the compressor is mounted as part storage is equipped with two lift rings on the top shell. -
Page 32: Compressor Mounting
Remaining flux would cause corrosion of the contact the product manufacturer or distributor. tubing. For specific applications not covered herein, please contact Danfoss for further information. FRCC.PC.035.A5.02... -
Page 33: Vacuum Evacuation And Moisture Removal
50 ppm end point dryness After burn out, remove & replace the liquid (EPD). Danfoss recommends DCL (solid core) line filter drier and install a Danfoss type DAS driers for the MLM compressor (R22 with mineral burnout drier of the appropriate capacity. Refer... -
Page 34: Refrigerant Charging
MLZ116 is factory charged with PVE32, when sight glass. topping up the compressor, customer could also use PVE68 lubricant. Danfoss supply PVE68 as The oil level can also be checked a few minutes accessory. after the compressor stops. -
Page 35: Ordering Information And Packaging
6 compressors, according below table. Each industrial pack pallet contains following accessories: • 4 grommets per compressor • 4 sleeves per compressor Packaging details Compressors MLZ116/MLM116 Pack type Industrial pack Compressors per pallet Static stacking of pallets ** 4 bolts per compressor Included... -
Page 36: Spare Parts & Accessories
Application Guidelines Spare parts & accessories Single compressors Solder sleeve adapter set Type Code n° Description Application Packaging Pack size 7765028 Rotolock adaptor set (2"1/4 ~ 1"5/8) , (1"3/4 ~ 1"1/8) MLM/MLZ116 Multipack * diameter restriction Rotolock adapter Type Code n° Description Application Packaging Pack size... - Page 37 Application Guidelines Spare parts & accessories Single compressors Rotolock nut Type Code n° Description Application Packaging Pack size 8153124 Rotolock nut,1"3/4 Models with 1-3/4” rotolock connection Multipack 8153126 Rotolock nut,2"1/4 Models with 2-1/4” rotolock connection Multipack 3-phase soft start equipment Type Code n°...
- Page 38 Sight glass with gaskets (black and white) All models Multipack 8156129 Gasket for oil sight glass, 1"1/8 (white teflon) All models Multipack 7956005 Gasket for oil sight glass, 1"1/8 (white teflon) All models Multipack 8154001 Danfoss Commercial Compressors blue spray paint All models Single pack FRCC.PC.035.A5.02...
- Page 39 Application Guidelines Content Manifold compressors General overview ....................... 40 Scope ........................................... 40 Benefits........................................40 Oil management concept ....................41 Active systems ......................................41 Passive systems ......................................42 Operating conditions ......................44 Power supply ......................................44 Compressor ambient temperature ..............................44 Operating envelope....................................
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Page 40: General Overview
Application Guidelines General overview Manifold compressors Scope The application guidelines describe the • It is essential to follow all the instructions operating characteristics, design features and given in these guidelines, the instruction application requirements for MLM/MLZ116 leaflet delivered with each compressor and the parallel compressors in medium temperature Application Guidelines for single compressors. -
Page 41: Oil Management Concept
Since oil equalization usually depends on equal sump pressures, this is To ensure suitable oil distribution, both passive a point of special attention. Danfoss Commercial and active types of systems are introduced into MLZ/MLM116 compressors. Compressors have developed specially adapted... -
Page 42: Passive Systems
Application Guidelines Oil management concept Manifold compressors Passive systems Danfoss has qualified only the even tandem A passive system is an oil management system (two same compressors) for passive solutions. without any measurement or control devices such as oil level regulators and oil controllers. - Page 43 Danfoss has qualified only the even tandem • To secure sufficient oil return to the compressor, (two same compressors) for passive solutions. Danfoss suggests below dimension requirement Compressor sumps and low-pressure shells are of the oil injection position: H>5D or H>111 mm.
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Page 44: Operating Conditions
There must be no more than 12 starts per hour (6 Danfoss recommends a restart delay timer to limit compressor cycling. when a resistor soft-start accessory is introduced); a number higher than 12 reduces the service life... -
Page 45: Defrost Cycle
Application Guidelines Operating conditions Manifold compressors Defrost cycle In refrigeration system applications, there are a dynamic liquid slug when the cycle switch different defrost methods, such as electric back to normal cooling operations. Sustained heating defrost, hot gas bypass defrost, and repeated liquid slugging and flooding can reversible defrost etc. -
Page 46: System Design Recommendations
Application Guidelines System design recommendations Manifold compressors Essential piping design Proper piping practices should be employed to from draining back to the discharge side of the considerations ensure adequate oil return, even under minimum compressor during off-cycle. The upper loop also load conditions, with special consideration helps avoid condensed liquid refrigerant from given to the size and slope of the tubing coming... -
Page 47: Expansion Device
The compressor Danfoss recommends an adequately sized suction lines must always enter the suction suction header which provides equal distribution header on the topside. A recommended suction of returning refrigerant and oil to each individual header design is shown below. -
Page 48: Oil Level Regulator
• The gas velocity in the suction header must be a Danfoss recommends the following as necessary maximum of 4 m/s. for secure a suction header installation: •... -
Page 49: Oil Separator For Active System
Oil level regulator Oil level regulator Oil level regulator Oil lter Danfoss recommends that high-pressure of view, high-pressure systems are more critical systems (oil separator installed in high pressure than traditional low pressure systems and care side) are configured in active solutions. These... -
Page 50: Installation And Service
No changes shall be made to the indicated Please contact Danfoss Sales for specific tubing diameter and fitting types. As for passive drawings. Wiring and rotation... -
Page 51: Ordering Information
Application Guidelines Ordering information Manifold compressors To build a complete tandem, one must order the To build a quadro, one must order 4 compressors 2 compressors and 1 manifolding kit 7777041 and 2 manifolding kit 7777041 plus 4 mounting plus 2 mounting kit 7777045. kit 7777045. -
Page 52: Tandem Unit Mlm/Mlz116
Application Guidelines Tandem unit MLM/MLZ116 Manifold compressors Operating principle MLM/MLZ116 tandems could use either passive load operation. The system has been designed to or active system to balance the oil level between ensure a precise pressure balancing between the the compressors. Each of the compressors may sumps, facilitating the oil equalization by gravity. -
Page 53: Compressor Mounting
Application Guidelines Tandem unit MLM/MLZ116 Manifold compressors Passive system 1"1/8 1"1/8 1"5/8 1"5/8 (2x) 4"1/8 Passive system (50 Hz) Note: the dimensions are external diameters .The compressors shown here are brazed version, but could also work with rotolock version. Compressor mounting The tandem is fixed on the frame by using HM10 x 100 grommet sleeves , flat washers , washers... -
Page 54: Trio Unit Mlm/Mlz116
Application Guidelines Trio unit MLM/MLZ116 Manifold compressors Operating principle MLM/MLZ116 trios could only use active system The system has been designed to ensure a to balance the oil level between the compressors. precise pressure balancing between the sumps, Each of the compressors may run alone to facilitating the oil equalization by gravity. -
Page 55: Compressor Mounting
Application Guidelines Trio unit MLM/MLZ116 Manifold compressors Compressor mounting The Trio is fixed on the frame by using grommet HM10 x 100 sleeves , flat washers , washers and and grommets , provided in kit 7777040. Ø 10 Ø... -
Page 56: Quadro Unit Mlz/Mlz116
Application Guidelines Quadro unit MLZ/MLZ116 Manifold compressors Operating principle MLM/MLZ116 quadro could only use active operation. The system has been designed to system to balance the oil level between the ensure a precise pressure balancing between the compressors. Each of the compressors may run sumps, facilitating the oil equalization by gravity. -
Page 57: Compressor Mounting
Application Guidelines Quadro unit MLZ/MLZ116 Manifold compressors Compressor mounting The tandem is fixed on the frame by using HM10 x 100 grommet sleeves , flat washers , washers and and the grommets , provided in kit 7777041. Ø 10 Ø... - Page 60 Our products can be found in a variety of applications such as rooftops, chillers, residential air conditioners, heatpumps, coldrooms, supermarkets, milk tank cooling and industrial cooling processes. http://cc.danfoss.com Danfoss Commercial Compressors, BP 331, 01603 Trévoux Cedex, France | +334 74 00 28 29 © Danfoss | DCS (CC) | 2017.07 FRCC.PC.035.A5.02...
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