Danfoss MLM Series Application Manuallines
Refrigeration scroll compressors 50-60 hz - r404a - r507 - r134a - r22
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Also See for MLM Series:
- Instructions for use (4 pages) ,
- Application manuallines (52 pages) ,
- Instructions (2 pages)
Related Manuals for Danfoss MLM Series
Summary of Contents for Danfoss MLM Series
- Page 1 MAKING MODERN LIVING POSSIBLE Application guidelines Refrigeration scroll compressors MLM / MLZ 50 - 60 Hz - R404A - R507 - R134a - R22 www.danfoss.com...
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Page 2: Table Of Contents
PPLICATION UIDELINES ONTENTS ..............................4 EATURES ........................5 CROLL COMPRESSION PRINCIPLE The scroll compression process................................5 ........................6 OMPRESSOR MODEL DESIGNATION Nomenclature .......................................6 Label ..........................................6 ..........................7 ECHNICAL SPECIFICATIONS 50 Hz ..........................................7 60 Hz ..........................................8 ..........................8 ECHNICAL SPECIFICATIONS R404A / R507 ........................................9 R22 ..........................................10 R134a ........................................... - Page 3 PPLICATION UIDELINES ONTENTS .......................31 PECIFIC APPLICATION RECOMMENDATIONS Low ambient application ..................................31 Scroll and reciprocating ..................................31 Low load operations ....................................32 Brazed plate heat exchangers ................................32 Water utilising systems ................................... 32 ......................33 OUND AND VIBRATION MANAGEMENT Starting sound level....................................33 Running sound level ....................................
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Page 4: Eatures
EATURES With its unique scroll design and manufacturing This new family of refrigeration compressors in- process fl exibility, the new Danfoss MLZ/MLM re- cludes 11 sizes of medium temperature scroll com- frigeration compressor off ers a highly effi cient so- pressors designed for commercial refrigeration lution for demanding refrigeration applications. -
Page 5: Croll Compression Principle
SUCTION COMPRESSION DISCHARGE Danfoss scroll compressors are manufactured us- of reliability and process control were fi rst prior- ing the most advanced machining, assembly, and ity. The result is a highly effi cient product with the process control techniques. -
Page 6: Compressor Model Designation
PPLICATION UIDELINES OMPRESSOR 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 tion port glass None Schrader None Threaded None Family, Refrigerant &... -
Page 7: Echnical Specifications
PPLICATION UIDELINES ECHNICAL SPECIFICATIONS 50 Hz Effi ciency * 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 11300 1.75 1.89 6.44 33.8 MLZ019 2 ½ 4500 15200 2.16... -
Page 8: 60 Hz
PPLICATION UIDELINES ECHNICAL SPECIFICATIONS 60 Hz Effi ciency * 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 13900 2.10 1.94 6.62 33.8 MLZ019 2 ½ 5500 18600 2.58... -
Page 9: R404A / R507
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.A4.02... -
Page 10: 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.A4.02... -
Page 11: 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.A4.02... -
Page 12: Dimensions
PPLICATION UIDELINES IMENSIONS MLZ/MLM015-019-021-026 4 x Ø 19 34° 31° 73° 45° 163.5 - 165.5 Discharge port1/2” Suction port 3/4” ODF 72.1-75.1 Oil sight glass Schrader valve and cap All dimensions in mm Terminal box Mounting grommet 29.5 Ø11 Ø 41 Recommended torque for Quick connect spade terminals mounting bolts: 11 Nm (±1 Nm) -
Page 13: Mlz/Mlm030-038-042-045-048
PPLICATION UIDELINES IMENSIONS MLZ/MLM030-038-042-045-048 4 x Ø 19 34° 31° 45° 73° 182.54 - 184.54 Discharge port 1/2” ODF 3/4” ODF Suction port 7/8” ODF Oil sight glass Schrader valve and cap MLZ/MLM 030-038-042-045 MLZ/MLM 048 All dimensions in mm Terminal box Mounting grommet T₁... -
Page 14: Mlz/Mlm058-066-076
PPLICATION UIDELINES IMENSIONS MLZ/MLM058-066-076 4 x Ø 19 73° 34° 31° 45° Discharge port 7/8” ODF Suction port 1”1/8 ODF Oil sight glass Schrader valve and cap MLZ/M058 MLZ/M066-076 All dimensions in mm Terminal box Mounting grommet T₁ 29.5 T₂ T₃... -
Page 15: Oil Sight Glass
PPLICATION UIDELINES IMENSIONS 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 check Oil sight glass of the oil amount and condition or it may be re- Schrader valve placed by an accessory oil management device. -
Page 16: Lectrical Data Connections And Wiring
PPLICATION UIDELINES LECTRICAL DATA CONNECTIONS AND WIRING Motor voltage MLZ/MLM scroll compressors are available in 6 diff erent 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... -
Page 17: Three Phase Electrical Characteristics
PPLICATION UIDELINES LECTRICAL 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 18: Lra (Locked Rotor Amp)
PPLICATION UIDELINES LECTRICAL DATA CONNECTIONS AND WIRING LRA (Locked Rotor Amp) LRA is the higher average current as measured on The LRA value can be used as a rough estimation a mechanically blocked compressor tested under for the starting current. However in most cases, nominal voltage. -
Page 19: Nominal Capacitor Value And Relays
PPLICATION UIDELINES LECTRICAL DATA CONNECTIONS AND WIRING at high temperature and thus at high resistance to open and would cause even further delay until as long as power is connected to the compres- the overload is reset. sor. When the compressor is switched off , the PTC cools down to its initial low resistance and be- The following PTC types are recommended for comes available to support the next compressor... -
Page 20: Three Phase
PPLICATION UIDELINES LECTRICAL 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 ....... -
Page 21: Pprovals And Certifications
Models with motor code 1, 2 & 4 except when using (Underwriters Laboratories) PTCSCR system Other approvals / certifi cates Contact Danfoss Conformity to directives Pressure equipment directive 97/23/EC Low voltage directive 2006 / 95 EC Machinery directive 98/35/EC annex II b... -
Page 22: Perating Conditions
MLZ compressors a very versatile mul- ti- refrigerant solution. Alkylbenzene oil can be applied in systems using MLM series compressors are charged with Alkyl- Alkylbenzene oil HCFC refrigerants (R22). Compared to a mineral benzene oil and herewith off er an economically... -
Page 23: Motor Supply
PPLICATION UIDELINES PERATING 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 24 PPLICATION UIDELINES PERATING CONDITIONS MLZ - R134a SH 11K Evaporating temperature (°C) MLZ / MLM - R22 SH: 11K RGT: 25°C Evaporating temperature (°C) FRCC.PC.015.A4.02...
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Page 25: Maximum Discharge Gas Temperature
DGT 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 26: High And Low Pressure Protection
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 pro- vides a minimum compressor running time of 2 minutes so as to provide for suffi... -
Page 27: Ystem Design Recommendations
PPLICATION UIDELINES YSTEM DESIGN RECOMMENDATIONS General Successful application of scroll compressors is correct for the system, it will operate beyond the dependent on careful selection of the compres- limits given in this manual. Poor performance, re- sor for the application. If the compressor is not duced reliability, or both may result. -
Page 28: Refrigerant Charge Limit
System design must be after. Please contact Danfoss for any deviation such that the amount of liquid refrigerant in the from these guidelines. - Page 29 MLZ/MLM compres- timer delay to empty the evaporators before the sors. If a Danfoss NRV check valve is applied it has stop. Time should be carefully set to not interfere to be carefully selected for the specifi c operation with the low safety pressure switch.
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Page 30: Liquid Fl Ood Back
PPLICATION UIDELINES YSTEM DESIGN RECOMMENDATIONS • While the thermostat is off , the number of pres- Other application needs a liquid receiver to store sure switch resets should be limited to avoid the refrigerant. short cycling of the compressor. Use dedicated wiring and an additional relay which allows for Receiver dimensioning requires special attention. -
Page 31: Pecific Application Recommendations
Several possible solutions are avail- able to prevent the risk of compressor to vacuum For further information, please contact Danfoss. and low pressure diff erential between the suction and discharge pressures. Scroll and reciprocating... -
Page 32: Low Load Operations
PPLICATION UIDELINES PECIFIC APPLICATION RECOMMENDATIONS Low load operations The compressor should be run for a minimum pe- the motor receives enough cooling under condi- riod to ensure that the oil has suffi cient time to tions of lowest refrigerant mass fl ow. properly return to the compressor sump and that Brazed plate A brazed plate heat exchanger needs very little in-... -
Page 33: Ound And Vibration Management
PPLICATION UIDELINES OUND AND VIBRATION MANAGEMENT Starting sound level During start-up transients it is natural for the sor rotation is characterized by an objectionable compressor sound level to be slightly higher than sound. To correct reverse rotation, disconnect during normal running. MLZ/MLM scroll com- power and switch any two of the three power pressors exhibit very little increased start-up tran- leads at the unit contactor. -
Page 34: Mechanical Vibrations
PPLICATION UIDELINES OUND AND VIBRATION MANAGEMENT Mechanical vibrations Vibration isolation constitutes the primary meth- a strict minimum. In addition, it is extremely im- od for controlling structural vibration. MLZ/MLM portant that the frame supporting the mounted scroll compressors are designed to produce compressor be of suffi... -
Page 35: Nstallation
PPLICATION UIDELINES NSTALLATION Each MLZ/MLM compressor is shipped with print- www.danfoss.com or directly from: ed Instructions for installation. These Instructions http://instructions.cc.danfoss.com can also be downloaded from our web site System cleanliness The refrigeration system, regardless of the type of small enough to pass through a mesh screen and compressor used, will only provide high effi... -
Page 36: Vacuum Evacuation And Moisture Removal
For specifi c applications not covered herein, please contact Danfoss for further information. Ensure that no fl ux is allowed to enter into the tubing or compressor. Flux is acidic and can cause... -
Page 37: Liquid Line Fi Lter Driers
After burn out, remove & replace the liquid line recommends DCL (solid core) driers for the MLM fi lter drier and install a Danfoss type DAS burnout compressor (R22 with Alkylbenzene) and DML drier of the appropriate capacity. Refer to the DAS... -
Page 38: Rdering Information And Packaging
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. • Each box also contains following accessories: •... -
Page 39: Single Pack
PPLICATION UIDELINES RDERING INFORMATION AND PACKAGING Single pack Model Voltage Voltage Voltage Voltage Voltage Voltage Compressors Connections Features variation code 1 code 2 code 4 code 5 code 7 code 9 MLZ015 121U8036 121U8002 121U8024 MLZ019 121U8060 121U8038 121U8004 121U8026 MLZ021 121U8062 121U8040... -
Page 40: Industrial Pack
RDERING INFORMATION AND PACKAGING PPLICATION UIDELINES Industrial pack Model Voltage Voltage Voltage Voltage Voltage Voltage Compressors Connections Features variation code 1 code 2 code 4 code 5 code 7 code 9 MLZ015 121U8035 121U8001 121U8023 MLZ019 121U8059 121U8037 121U8003 121U8025 MLZ021 121U8061 121U8039... -
Page 41: Pare Parts Accessories
& PPLICATION UIDELINES PARE PARTS ACCESSORIES Run capacitors for PSC wiring Pack Type Code n° Description Application Packaging size 40 μF 8173231 PSC wiring 40 μF MLZ015 Multipack 70 μF 120Z0051 PSC wiring Run Capacitor 70 μF, motor voltage code 5 - 220-240V / 1 / 50Hz MLZ019-021-026 Multipack 50 μF... -
Page 42: Discharge Temperature Protection
& PPLICATION UIDELINES PARE PARTS ACCESSORIES Discharge temperature protection Pack Type Code No Description Application Packaging Size 7750009 Discharge thermostat kit All models Multipack 7973008 Discharge thermostat kit All models Industry pack Magnetic discharge non return valve Pack Type Code No Description Application Packaging... - Page 44 Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specifi cations already agreed.
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