Danfoss MLM Series Application Manuallines
Scroll for refregeration
Hide thumbs
Also See for MLM Series:
- Instructions for use (4 pages) ,
- Application manuallines (44 pages) ,
- Instructions (2 pages)
Related Manuals for Danfoss MLM Series
Summary of Contents for Danfoss MLM Series
- Page 1 Application guidelines Danfoss Scroll for Refrigeration MLM / MLZ 50-60Hz - R404A - R507 - R134a - R22 - R407A - R407F http://cc.danfoss.com...
-
Page 3: Table Of Contents
Application Guidelines Content Features ............ 4 System design recommendations ..34 General ..................34 Scroll compression principle ....5 Essential piping design considerations .....34 The scroll compression process........5 Refrigerant charge limit ..........35 Off-cycle migration ............35 Compressor model designation ..... 6 Liquid flood back ...............37 Nomenclature ...............6 Specific application recommendations 38 Label ..................6... -
Page 4: Features
Features With its unique scroll design and manufacturing are engineered for refrigeration, and offer process flexibility, the new Danfoss MLZ/ cooling capacity from 3.4 to 21 kW (2 to 10 HP) MLM refrigeration compressor offers a highly at common voltages and frequencies as well... -
Page 5: Scroll Compression Principle
SUCTION COMPRESSION DISCHARGE Danfoss scroll compressors are manufactured 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 design of... -
Page 6: Compressor Model Designation
Application Guidelines Compressor model designation Nomenclature Type Size Motor Features M LZ T 4 L Application Other features M: medium temperature refrigeration Oil equali- LP gauge Oil sight Gas equalisa- sation drain port glass tion port Threaded None Schrader None None Family, Refrigerant &... -
Page 7: Technical Specifications
Application Guidelines Technical specifications 50 Hz 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 MLZ015 3300 11263 1.75 1.89 6.45 33.77 5.88 1.06 30.84 MLZ019 4500 15358... - Page 8 Application Guidelines Technical specifications 50 Hz 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 MLZ015 3100 10580 1.55 6.83 33.77 5.88 1.06 30.84 MLZ019 4000 13652 2.04...
-
Page 9: 60 Hz
Technical specifications Application Guidelines 60 Hz 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 MLZ015 4100 13993 2.10 1.94 6.62 33.77 7.09 1.06 30.84 MLZ019 5500 18771... - Page 10 Application Guidelines Technical specifications 60 Hz 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 MLZ015 3800 12969 1.85 2.04 6.96 33.77 7.09 1.06 30.84 MLZ019 4900 16724...
-
Page 11: R404A / R507
37300 11.30 Legend: To: Evaporating temperature in °C Qo: Cooling capacity in W RGT= 20°C Tc: Condensing temperature in °C Pe: Power input in kW Subooling= 0K Capacity data at other conditions are available in the datasheets at: www.danfoss.com/odsg FRCC.PC.015.A8.02... -
Page 12: R22
Legend: To: Evaporating temperature in °C Qo: Cooling capacity in W RGT = 20°C Tc: Condensing temperature in °C Pe: Power input in kW Subcooling =0 K Capacity data at other conditions are available in the datasheets at: www.danfoss.com/odsg FRCC.PC.015.A8.02... -
Page 13: R134A
Legend: To: Evaporating temperature in °C Qo: Cooling capacity in W RGT = 20°C Tc: Condensing temperature in °C Pe: Power input in kW Subcooling =0 K Capacity data at other conditions are available in the datasheets at: www.danfoss.com/odsg FRCC.PC.015.A8.02... -
Page 14: R407A
Qo: Cooling capacity in W RGT = 20°C Tc: Condensing temperature in °C Pe: Power input in kW Subcooling =0 K Capacity data at other conditions are available in the datasheets at: www.danfoss.com/odsg Only motor code4.code5 of MLZ are qualified with R407A FRCC.PC.015.A8.02... -
Page 15: R407F
Qo: Cooling capacity in W RGT = 20°C Tc: Condensing temperature in °C Pe: Power input in kW Subcooling =0 K Capacity data at other conditions are available in the datasheets at: www.danfoss.com/odsg Only motor code4.code5 of MLZ are qualified with R407F FRCC.PC.015.A8.02... -
Page 16: Dimensions
Application Guidelines Dimensions MLZ/MLM015-019-021-026 Brazed Rotolock 4x Ø19.0 4 x Ø 19 111.5 suction line 34° 31° 31° 34° 73° 73° 45° 45°±2° Ø163.5-165.5 Ø163.5 - 165.5 Discharge port1/2” Discharge line Suction port 3/4” ODF Ø1.00”-14UN(2A) Suction line Ø1”1/4-12UN(2A) 72.1-75.1 72.1-75.1 Oil sight glass Oil sight glass... -
Page 17: Mlz/Mlm030-038-042-045-048
Application Guidelines Dimensions MLZ/MLM030-038-042-045-048 Brazed Rotolock 4x Ø19 4 x Ø 19 95.25 121.2 suction line 120.3 34° 31° 34° 31° 45°±2° 45° 73° Ø182.54-184.54 Ø182.54 - 184.54 Discharge port Discharge line 1/2” ODF 1) Ø1” - 14UN(2A) 3/4” ODF 2) Ø1”1/4 - 12UN (2A) Suction port 7/8”... -
Page 18: Mlz/Mlm058-066-076
Application Guidelines Dimensions MLZ/MLM058-066-076 Brazed Rotolock 4 x Ø 19 4xØ19 124.9 suction line 119.27 73° 34° 31° 45° 31° 73° 45°±2° Ø185 Ø185 Discharge port 7/8” ODF Discharge line Suction port 1”1/8 ODF Suction line Ø1”1/4 - 12UN(2A) Ø1”3/4 - 12UN(2A) Oil sight glass 1) 517 1) 490... -
Page 19: Oil Sight Glass
Application Guidelines Dimensions Oil sight glass MLZ / MLM scroll compressors come equipped with a threaded oil sight glass with 1"1/8 - 18 UNEF connection. It can be used for a visual Oil sight glass check of the oil amount and condition or it may Schrader valve be replaced by an accessory oil management and cap... -
Page 20: Electrical Data, Connections And Wiring
Application Guidelines Electrical data, connections and wiring Motor voltage MLZ/MLM scroll compressors are available in 6 different motor voltages. Motor voltage Motor voltage Motor voltage Motor voltage Motor voltage Motor voltage code 1 code 2 code 4 code 5 code 7 code 9 200-220 V - 3 ph 380-415 V - 3 ph... -
Page 21: Three Phase Electrical Characteristics
Application Guidelines Electrical data, connections and wiring Three phase electrical Max Oper A Winding resistance (Ohm) characteristics Compressor model T1-T3 T1-T2 T2-T3 MLZ/MLM015T2 14.5 1.23 1.67 1.67 MLZ/MLM019T2 17.5 13.3 0.87 1.18 1.18 MLZ/MLM021T2 17.5 13.6 0.87 1.18 1.18 MLZ/MLM026T2 22.0 16.6 0.87... -
Page 22: Lra (Locked Rotor Amp)
Application Guidelines Electrical data, connections and wiring LRA (Locked Rotor Amp) LRA is the higher average current as measured The LRA value can be used as a rough estimation on a mechanically blocked compressor tested for the starting current. However in most cases, under nominal voltage. -
Page 23: Nominal Capacitor Value And Relays
Application Guidelines Electrical data, connections and wiring remains at high temperature and thus at high internal protector to open and would cause even resistance as long as power is connected to the further delay until the overload is reset. compressor. When the compressor is switched off, the PTC cools down to its initial low resistance The following PTC types are recommended for and becomes available to support the next... -
Page 24: Three Phase
Application Guidelines Electrical data, connections and wiring Three phase CONTROL CIRCUIT Suggested wiring diagram with "one shot" pump down cycle and safety lock-out relay 180 s Control device ..........TH Optional short cycle timer (3 min) ..180 s Control relay ............ KA Liquid Line Solenoid valve ......LLSV Compressor contactor ........ -
Page 25: Approvals And Certifications
All MLZ models (European Directive) Models with motor code 1, 5 except when using (Underwriters Laboratories) PTCSCR system Other approvals / certificates Contact Danfoss Conformity to directives Pressure equipment directive 2014/68/EU Low voltage directive 2014/35/EU Machinery directive 2006/42/EC Products MLZ / MLM 015 to 076... -
Page 26: Operating Conditions
Application Guidelines Operating conditions • 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 27 PVE is much more hygroscopic than alkylbenzene or mineral oil. Alkylbenzene oil Alkylbenzene oil can be applied in systems MLM series compressors are charged with using HCFC refrigerants (R22). Compared to Alkylbenzene oil and herewith offer an economically interesting alternative to the...
-
Page 28: Motor Supply
Application Guidelines Operating conditions Motor supply MLZ / MLM scroll compressors can be operated ranges. In case of risk of under-voltage operation, at nominal voltages as indicated in table section special attention must be paid to current draw “Motor voltage”. Under-voltage and over-voltage and start assist for single-phase compressors may operation is allowed within the indicated voltage be required. - Page 29 Application Guidelines Operating conditions MLZ - R134a SH 11K Evaporating temperature (°C) MLZ / MLM - R22 SH: 11K RGT: 25°C Evaporating temperature (°C) FRCC.PC.015.A8.02...
- Page 30 Application Guidelines Operating conditions MLZ015~066 - R407A SH:10K RGT: 20°C Evaporating temperature (°C) MLZ076 - R407A SH:10K RGT: 20°C Evaporating temperature (°C) FRCC.PC.015.A8.02...
- Page 31 Application Guidelines Operating conditions MLZ015~066 - R407F SH:10K RGT: 20°C Evaporating temperature (°C) MLZ076 - R407F SH:10K RGT: 20°C Evaporating temperature (°C) FRCC.PC.015.A8.02...
-
Page 32: 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”. MLZ / MLM R22 - SH 11K Example 1 ... -
Page 33: High And Low Pressure Protection
12 starts per hour can reduce the service life depends upon system design. of the motor-compressor unit. A one-minute time out is recommended. Danfoss recommends a restart delay timer to limit compressor cycling. The system must be designed in a way that provides a minimum compressor running time... -
Page 34: System Design Recommendations
Application Guidelines System design recommendations 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. is not correct for the system, it will operate Essential piping design Proper piping practices should be employed to... -
Page 35: Refrigerant Charge Limit
More detailed information can be found in the place in the compressor and/or the suction line instead of the evaporator. System design must be paragraphs hereafter. Please contact Danfoss for such that the amount of liquid refrigerant in the any deviation from these guidelines. - Page 36 Belt-type crankcase heater accessories are Optimum location area available from Danfoss (see section “Spare parts & Accessories”). The heater must be energized whenever the compressor is off. Provide separate electrical supply for the heaters so that they remain energized even when the machine is out of service (eg.
-
Page 37: Liquid Flood Back
Application Guidelines System design recommendations • While the thermostat is off, the number of Other application needs a liquid receiver to store pressure switch resets should be limited to the refrigerant. avoid short cycling of the compressor. Use dedicated wiring and an additional relay which Receiver dimensioning requires special attention. -
Page 38: 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 39: Low Load Operations
Application Guidelines Specific application recommendations 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 Due to the small volume of the brazed plate heat... -
Page 40: Sound And Vibration Management
Application Guidelines Sound and vibration management Starting sound level During start-up transients it is natural for the compressor rotation is characterized by an compressor sound level to be slightly higher objectionable sound. To correct reverse rotation, than during normal running. MLZ/MLM scroll disconnect power and switch any two of the compressors exhibit very little increased start-up three power leads at the unit contactor. -
Page 41: Mechanical Vibrations
Application Guidelines Sound and vibration management 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 42: Installation
Application Guidelines Installation Each MLZ/MLM compressor is shipped with www.danfoss.com or directly from: printed Instructions for installation. These http://instructions.cc.danfoss.com Instructions can also be downloaded from our web site System cleanliness The refrigeration system, regardless of the type mesh screen and can cause considerable damage of compressor used, will only provide high within a bearing assembly. - Page 43 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. Ensure that no flux is allowed to enter into the tubing or compressor. Flux is acidic and can cause Brazed...
-
Page 44: 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 burnout drier of the appropriate capacity. Refer... -
Page 45: Ordering Information And Packaging
Compressors are packed individually in a cardboard box. They can be ordered in any quantity. Minimum ordering quantity = 1. As far as possible, Danfoss will ship the boxes on full pallets of 6 or 9 compressors according below table. -
Page 46: Single Pack
Application Guidelines Ordering information and packaging Single pack Brazed version Model Voltage Voltage Voltage Voltage Voltage Voltage Compressors Connections Features variation code 1 code 2 code 4 code 5 code 7 code 9 MLZ015 120U8036 121U8002 121U8024 MLZ019 121U8060 121U8038 121U8004 121U8026 MLZ021... -
Page 47: Industrial Pack
Application Guidelines Ordering information and packaging Industrial pack Brazed version Model Voltage Voltage Voltage Voltage Voltage Voltage Compressors Connections Features variation code 1 code 2 code 4 code 5 code 7 code 9 MLZ015 120U8035 121U8001 121U8023 MLZ019 121U8059 121U8037 121U8003 121U8025 MLZ021... -
Page 48: Spare Parts & Accessories
Application Guidelines Spare parts & accessories Run capacitors for PSC wiring Type Code n° Description Application Packaging Pack size 80 μF 120Z0052 PSC wiring Run Capacitor 80 μF, 60HZ,Motor Code 1 : MLZ/MLM042 Multipack "50Hz,Motor Code 5: MLZ/MLM019-021-26 70 μF 120Z0051 PSC wiring Run Capacitor 70 μF, Multipack... - Page 49 Application Guidelines Spare parts & accessories Rotolock service valves and valve sets (without gasket) Code n° Description Application Packaging Pack size 7968004 Rotolock valve, V06, (1" Rotolock, 1/2" ODF) Industry pack Discharge MLM/Z015-026-045 8168031 Rotolock valve, V06, (1" Rotolock, 1/2" ODF) Multipack 7968006 Rotolock valve, V04, (1"1/4 Rotolock, 3/4"...
- Page 50 Application Guidelines Spare parts & accessories Magnetic discharge non return valve Code No Description Application Packaging Pack Size 120Z5046 Magnetic discharge non return valve MLZ/MLM058-066-076 Multipack Lubricant Code No Description Application Packaging Pack Size 120Z5034 PVE lubricant, 1 litre can 320HV (FVC68D) Multipack IP54 upgrade kit Code No...
- Page 52 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) | 2016.12 FRCC.PC.015.A8.02...
Need help?
Do you have a question about the MLM Series and is the answer not in the manual?
Questions and answers