Related Manuals for Danfoss MLZ Evolution A
Summary of Contents for Danfoss MLZ Evolution A
- Page 1 Application guidelines Danfoss Scroll for Refrigeration MLZ Evolution A (with POE Oil) 50-60 Hz - R404A - R507 - R134a - R22 - R407A - R407F - R448A - R449A - R452A - R513A www.danfoss.com...
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Page 3: Table Of Contents
Application Guidelines Content Features ............. 4 Maximum discharge gas temperature .......28 High and low pressure protection........29 Scroll compression principle ....5 On/off cycling (cycle rate limit) ........29 The scroll compression process........5 System design recommendations ..30 Compressor model designation ....6 General ...................30 Nomenclature ................ -
Page 4: Features
Application Guidelines Features With its unique scroll design and manufacturing scroll compressors designed for commercial process flexibility, the new Danfoss MLZ refrigeration applications. These compressors are refrigeration compressor offers a highly engineered for refrigeration, and offer cooling efficient solution for demanding refrigeration capacity from 3.4 to 21kW (2 to 10HP) at common... -
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 Evolution T 4 L Application Index M: Medium temperature refrigeration - with PVE oil A with POE oil Other features Family, Refrigerant LP gauge Oil sight Gas equalisation LZ(A): R404A - R507 - R22 - R134a - R407A - equalisation port glass... -
Page 7: Technical Specifications
Application Guidelines Technical specifications 50Hz Efficiency * Nominal Power Net weight Swept volume Displacement Oil charge cooling capacity * input * (with oil) Model Btu/h Btu/h/W /rev cu.in/rev cu.ft/h Litres MLZ015 3300 11300 1.75 1.89 6.45 33.8 2.06 MLZ019 4500 15400 2.16 2.06... - Page 8 Application Guidelines Technical specifications 50Hz Efficiency * Nominal Power Net weight Swept volume Displacement Oil charge cooling capacity * input * (with oil) Model Btu/h Btu/h/W /rev cu.in/rev cu.ft/h Litres MLZ015 3100 10580 1.55 2.00 6.83 33.8 2.06 MLZ019 4000 13652 2.04 1.96...
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Page 9: 60Hz
Application Guidelines Technical specifications 60Hz Efficiency * Nominal Power Net weight Swept volume Displacement Oil charge cooling capacity * input * (with oil) Model Btu/h Btu/h/W /rev cu.in/rev cu.ft/h Litres MLZ015 4100 14000 2.10 1.94 6.62 33.8 2.06 MLZ019 5500 18800 2.58 2.11... - Page 10 Application Guidelines Technical specifications 60Hz Efficiency * Nominal Power Net weight Swept volume Displacement Oil charge cooling capacity * input * (with oil) Model Btu/h Btu/h/W /rev cu.in/rev cu.ft/h Litres MLZ015 3800 12969 1.85 2.04 6.96 33.8 2.06 MLZ019 4900 16724 2.40 2.06...
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Page 11: Dimensions
Application Guidelines Dimensions MLZ015-019-021-026 Brazed Rotolock (9.40) (9.40) 4x Ø19.0 (7.50) (7.50) 4 x Ø 19 (4x Ø0.75) 4 x (Ø 0.75) (5.07) 111.5 (4.39) (5.06) suction line (4.32) (9.40) (7.50) (9.40) (7.50) (4.33) (4.37) 31° 34° 34° 31° 73° 73°... -
Page 12: Mlz030-038-042-045-048
Application Guidelines Dimensions MLZ030-038-042-045-048 Brazed Rotolock 239 (9.40) 4 x Ø 19 239 (9.40) 190 (7.50) 4 x (Ø 0.75) 190 (7.50) 4 x Ø 19 4 x (Ø 0.75) 95.25 121.2 (4.77) (3.75) suction (5.27) (5.27) line (4.64) (9.40) (9.40) (7.50) (7.50) -
Page 13: Mlz058-066-076
Application Guidelines Dimensions MLZ058-066-076 Brazed Rotolock 232 (9.13) 232 (9.13) 4 x Ø 19 190 (7.50) 190 (7.50) 4 x (Ø 0.75) 4 x Ø 19 4 x (Ø 0.75) (5.23) (4.92) 124.9 (4.91) (9.13) (5.23) suction line (7.50) (9.13) (7.50) 119.27 (4.84) -
Page 14: Oil Sight Glass
Application Guidelines Dimensions Oil sight glass MLZ 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 Schrader valve replaced by an accessory oil management device. -
Page 15: Electrical Data, Connections And Wiring
Application Guidelines Electrical data, connections and wiring Motor voltage MLZ 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 9 200-220V - 3ph 380-415V - 3ph... -
Page 16: 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 MLZ015T2 14.5 1.23 1.67 1.67 MLZ019T2 20.0 13.3 0.87 1.18 1.18 MLZ021T2 20.0 13.6 0.87 1.18 1.18 MLZ026T2 22.0 16.6 0.87... -
Page 17: 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 18: Nominal Capacitor Value And Relays
Application Guidelines Electrical data, connections and wiring It is important to provide sufficient time between The following PTC types are recommended for motor starts to allow the PTC to cool down the MLZ single phase compressors: close to ambient temperature. Depending on the ambient conditions and the cooling of the PTC, this may take about 5 minutes. -
Page 19: 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 20: Approvals And Certifications
(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 annex II b Electromagnetic compatibility 2014/30/EU... -
Page 21: Operating Conditions
Application Guidelines Operating conditions The scroll compressor application range is • Refrigerant and lubricants influenced by several parameters which need to • Motor supply be monitored for a safe and reliable operation. • Compressor ambient temperature • Application envelope (evaporating These parameters and the main recommendations for good practice and safety temperature, condensing temperature, return... - Page 22 HFC refrigerants. with POE compressor could replace it. As PVE oil This product provides effective wear protection is fully miscible with POE, Danfoss recommends for steel and aluminum surfaces for increased the POE oil( RL46HB) regardless of oil charge in system life and improved efficiency and is the compressor.
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Page 23: Motor Supply
Application Guidelines Operating conditions Motor supply MLZ scroll compressors can be operated at ranges. In case of risk of under-voltage operation, 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 Application Guidelines Operating conditions MLZ - R134a Evaporating temperature (°F) SH 11K (19.8°F) Evaporating temperature (°C) MLZ015~066 - R407A Evaporating temperature (°F) SH:10K(18°F) RGT: 20°C (68°F) Evaporating temperature (°C) AB243286444663en-001003...
- Page 25 Application Guidelines Operating conditions MLZ076 - R407A Evaporating temperature (°F) SH:10K (18°F) RGT: 20°C (68°F) Evaporating temperature (°C) MLZ015~066 - R407F Evaporating temperature (°F) SH:10K (18°F) RGT: 20°C (68°F) Evaporating temperature (°C) AB243286444663en-001003...
- Page 26 Application Guidelines Operating conditions MLZ076 - R407F Evaporating temperature (°F) SH:10K (18°F) RGT: 20°C (68°F) Evaporating temperature (°C) MLZ - R22 Evaporating temperature (°F) SH: 11K (19.8°F) RGT: 25°C (77°F) Evaporating temperature (°C) AB243286444663en-001003...
- Page 27 Application Guidelines Operating conditions MLZ - R448A/R449A Evaporating temperature (°F) SH10K (18°F) RGT: 20°C (68°F) Evaporating temperature (°C) MLZ - R452A Evaporating temperature (°F) SH10K (18°F) RGT: 20°C (68°F) Evaporating temperature (°C) AB243286444663en-001003...
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Page 28: 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”. Thermostat Discharge line Insulation... -
Page 29: 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. AB243286444663en-001003... -
Page 30: 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 31: Refrigerant Charge Limit
More detailed information can be found in the instead of the evaporator. System design must be paragraphs hereafter. Please contact Danfoss for any deviation from these guidelines. such that the amount of liquid refrigerant in the... - Page 32 Optimum location area Belt-type crankcase heater accessories are available from Danfoss (see section “Spare parts & Accessories”). The heater must be energized whenever the compressor is off. Liquid line solenoid valve (LLSV): This feature is...
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Page 33: 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 34: Specific Application Recommendations
Several possible solutions are discharge line. available to prevent the risk of compressor to vacuum and low pressure differential between For further information, please contact Danfoss. the suction and discharge pressures. Scroll and reciprocating Unlike the reciprocating compressor, a scroll When moving from a reciprocating compressor doesn’t have dead volume. -
Page 35: 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 heat A brazed plate heat exchanger needs very Due to the small volume of the brazed plate heat... -
Page 36: 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 scroll disconnect power and switch any two of the compressors exhibit very little increased start-up three power leads at the unit contactor. -
Page 37: Mechanical Vibrations
Application Guidelines Sound and vibration management Mechanical vibrations Vibration isolation constitutes the primary extremely important that the frame supporting method for controlling structural vibration. the mounted compressor be of sufficient mass MLZ scroll compressors are designed to produce and stiffness to help dampen any residual minimal vibration during operations. -
Page 38: Installation
Application Guidelines Installation Each MLZ compressor is shipped with printed www.danfoss.com or directly from: 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 mesh screen and can cause considerable damage of compressor used, will only provide high within a bearing assembly. - Page 39 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 connection...
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Page 40: Vacuum Evacuation And Moisture Removal
A properly sized & type of drier is required. After burn out, remove & replace the liquid Important selection criteria include the driers line filter drier and install a Danfoss type DAS water content capacity, the system refrigeration burnout drier of the appropriate capacity. Refer capacity, and the system refrigerant charge. -
Page 41: 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 8 or 9 compressors. • Each box also contains following accessories: •... - Page 42 Application Guidelines Ordering information and packaging Single pack - Brazed version Model Compressors Connections Features Voltage code 1 Voltage code 2 Voltage code 4 Voltage code 5 Voltage code 9 variation MLZ015 121L8659 121L8669 121L8629 121L8631 121L8689 MLZ019 121L8717 121L8721 121L8725 121L8729 MLZ021...
- Page 43 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 120U8669 121U8629 121U8631 MLZ019 121U8717 121U8721 121U8725 121U8729 MLZ021...
- Page 44 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 120U8668 121U8628 121U8630 MLZ019 121U8716 121U8720 121U8724 121U8728 MLZ021...
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Page 45: Spare Parts & Accessories
Application Guidelines Spare parts & accessories Run capacitors for PSC wiring Type Code n° Description Application Packaging Pack size 80μF 120Z0052 PSC wiring Run Capacitor 80μF, 60Hz, Motor Code 1 : MLZ/MLM042 Multipack 50Hz, Motor Code 5: MLZ/MLM019-021-26 70μF 120Z0051 PSC wiring Run Capacitor 70μF, Multipack 60Hz, Motor Code 1 : MLZ/MLM030... - Page 46 Application Guidelines Spare parts & accessories Rotolock adapters Code n° Description Application Packaging Pack size 120Z0366 Rotolock adaptor (1-1/4" ~ 3/4") MLZ015-019-021-026 suction Multipack 120Z0367 Rotolock adaptor (1-1/4" ~ 7/8") MLZ030-038-042-045-048 suction Multipack 120Z0364 Rotolock adaptor (1-3/4" ~ 1-1/8") MLZ058-066-076 suction Multipack MLZ015-019-021-026-030-038-042-045 120Z0365...
- Page 47 Application Guidelines Spare parts & accessories Magnetic discharge non return valve Code No Description Application Packaging Pack Size 120Z5046 Magnetic discharge non return valve MLZ058-076 Multipack Lubricant Code No Description Application Packaging Pack Size 120Z0648 POE lubricant, 215PZ(RL46HB),1 litre can Multipack IP54 upgrade kit Code No...
- Page 48 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. www.danfoss.com Danfoss, BP 331, 01603 Trévoux Cedex, France | +334 74 00 28 29 AB243286444663en-001003 © Danfoss | DCS (CC) | 2020.06...