Related Manuals for Danfoss MLZ
Summary of Contents for Danfoss MLZ
- Page 1 MAKING MODERN LIVING POSSIBLE MLZ / MLM Refrigeration scroll compressors 50 - 60 Hz - R404A - R507 - R134a - R22 Selection & REFRIGERATION & application guidelines AIR CONDITIONING DIVISION...
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Page 2: Table Of Contents
Serial number ..................................6 ......................7 ECHNICAL SPECIFICATIONS ......................8 ECHNICAL SPECIFICATIONS 50 Hz ..................................... 8 60 Hz ..................................... 9 ..........................10 IMENSIONS MLZ/MLM015-019-021-026 ............................10 MLZ/MLM030-038-045-048 ............................11 MLZ/MLM058-066-076 ..............................12 Oil sight glass ..................................13 Schrader ....................................13 Suction and discharge connections ........................13 ................14 LECTRICAL DATA CONNECTIONS AND WIRING Motor voltage .................................14... - Page 3 PPLICATION GUIDELINES ONTENTS ..................29 PECIFIC APPLICATION RECOMMENDATIONS Low ambient application ............................29 Scroll and reciprocating ..............................29 Low load operations ..............................30 Brazed plate heat exchangers ...........................30 Water utilising systems ..............................30 ..................31 OUND AND VIBRATION MANAGEMENT Starting sound level ..............................31 Running sound level ..............................31 Stopping sound level ..............................31 Sound generation in a refrigeration system ......................31 Compressor sound radiation .............................31...
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Page 4: Features
PPLICATION GUIDELINES EATURES With its unique scroll design and manufacturing pressors designed for commercial refrigeration process flexibility, the new Danfoss MLZ/MLM re- applications. These compressors are engineered frigeration compressor offers a highly efficient so- for refrigeration, and offer cooling capacity from 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 first prior- ing the most advanced machining, assembly, and ity. The result is a highly efficient product with the process control techniques. In design of both the... -
Page 6: Ompressor Model Designation
PPLICATION GUIDELINES 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 port glass drain tion port None Schrader None Threaded None Family, Refrigerant &... -
Page 7: Echnical Specifications
9 800 33 500 4.49 2.18 7.45 9.08 99.6 MLZ076 10 900 37 300 5.11 2.14 7.30 9.91 99.6 MLZ/MLM015 MLZ/MLM019 2 ½ 4 600 15 600 2.03 2.26 7.71 2.66 MLZ/MLM021 4 900 16 700 2.23 2.19 7.48 2.82 MLZ/MLM026 3 ½... -
Page 8: Echnical Specifications
All performance data are for motor voltage code 4, 400 V / 3ph / 50 Hz * R507 performance data are nearly identical to R404A performance data Capacity data at other conditions are available in the datasheets at: www.danfoss.com/odsg FRCC.PC.016.A1.22... -
Page 9: 60 Hz
All performance data are for motor voltage code 4, 460 V / 3 ph / 60 Hz * R507 performance data are nearly identical to R404A performance data Capacity data at other conditions are available in the datasheets at: www.danfoss.com/odsg FRCC.PC.016.A1.22... -
Page 10: Dimensions
PPLICATION GUIDELINES IMENSIONS MLZ/MLM015-019-021-026 9.40 7.50 4 x Ø 0.75 5.06 4.32 9.40 7.50 4.38 34° 31° 73° 45° 6.45 Discharge port1/2” Suction port 3/4” ODF 2.90 Oil sight glass 15.48 14.19 Schrader valve and cap 9.09 7.67 3.09 2.15 All dimensions in Inch 0.74... -
Page 11: Mlz/Mlm030-038-045-048
Discharge port 1/2” ODF 3/4” ODF Suction port 7/8” ODF 3.70 17.16 Oil sight glass 15.85 10.27 Schrader valve and cap MLZ/MLM 030-038-045 3.36 MLZ/MLM 048 2.22 All dimensions in Inch 0.74 0.43 Terminal box Mounting grommet 0.06 1.16 1.61 5/16”... -
Page 12: Mlz/Mlm058-066-076
PPLICATION GUIDELINES IMENSIONS MLZ/MLM058-066-076 9.13 7.491 - 7.509 4 x Ø 0.75 - 0.78 5.24 4.93 9.13 7.491-7.509 4.84 73° 34° 31° 45° 7.211 - 7.288 Discharge port 7/8” ODF Suction port 1”1/8 ODF 3.63 - 3.70 19.29 20.34 19.66 20.72... -
Page 13: Oil Sight Glass
The oil fill and drain connection and gauge port is a 1/4” male flare connector incorporating a schrader valve. Suction and discharge MLZ / MLM scroll compressors are factory deliv- connections ered with brazed connections only. Dedicated rotolock adaptors and adaptor sets are available as accessory. -
Page 14: Lectrical Data
PPLICATION GUIDELINES LECTRICAL DATA CONNECTIONS AND WIRING Motor voltage MLZ/MLM scroll compressors are available in 3 different motor voltages. Motor voltage code 1 Motor voltage code 2 Motor voltage code 4 Motor voltage code 5 Nominal voltage 200-220 V / 3 ph / 50 Hz... -
Page 15: Three Phase Electrical Characteristics
0.32 0.33 MLZ076T2 50.0 47.6 0.32 0.32 0.33 Single phase electrical Max. Oper. A Winding resistance (Ω) Compressor model characteristics start MLZ/MLM 015T5 MLZ/MLM 019T5 23.0 18.3 0.69 1.51 MLZ/MLM 021T5 25.0 19.5 0.69 1.51 MLZ/MLM 026T5 27.0 24.2 0.69 1.51... -
Page 16: Winding Resistance
305C9* / 305C11* MLZ/MLM030 305C9* / 305C11* 305C9* / 305C11* MLZ/MLM038 305C9* / 305C11* 305C9* / 305C11* Note: MLZ compressors with PTCSCR are not approved by UL. It is the customers’ responsibility to get final approval for the system when required. FRCC.PC.016.A1.22... -
Page 17: Nominal Capacitor Value And Relays
Additionnal components for CSR wiring with run capacitor only PSC wiring CSR wiring Compressor models Run capacitor Start capacitor Relay μF Volt μF Volt Reference MLZ/MLM015-019-021-026 145-175 3ARR3J3AL4 RVA9CKL 220-240 V /1/50 Hz MLZ/MLM030 161-193 3ARR3J24AP4 RVA3EKL Motor voltage code 5 MLZ/MLM038-045-048 88-108 3ARR3J25AS4... -
Page 18: Internal Motor Protection
PPLICATION GUIDELINES LECTRICAL DATA CONNECTIONS AND WIRING Internal motor protection MLZ/MLM scroll compressors are equipped with failure to start, running overload, and fan failure. an internal line break protector mounted on the motor windings. The protector is an automatic If the internal overload protector trips out, it must reset device, containing a snap action bimetal cool down to about 140°F to reset. -
Page 19: Approvals And Certifications
PPLICATION GUIDELINES PPROVALS AND CERTIFICATIONS Approvals and certifi cates MLZ scroll compressors comply with the following Certificates are listed on the product datasheets: approvals and certificates. http://www.danfoss.com/odsg CE 0062 or CE 0038 All MLZ models (European Directive) Models with motor code 1, 2 & 4 except when using... -
Page 20: Perating Conditions
The PVE lubricant is compatible with R22 which easier. makes the MLZ compressors a very versatile multi- refrigerant solution. Alkylbenzene oil Alkylbenzene oil can be applied in systems using MLM series compressors are charged with Alkyl- HCFC refrigerants (R22). -
Page 21: Motor Supply
PPLICATION GUIDELINES PERATING CONDITIONS Motor supply MLZ / MLM scroll compressors can be operated at risk of under-voltage operation, special attention nominal voltages as indicated on page 14. Under- must be paid to current draw and start assist for voltage and over-voltage operation is allowed single-phase compressors may be required. - Page 22 PPLICATION GUIDELINES PERATING CONDITIONS MLZ - R134a SH: 20°F Evaporating temperature (°F) MLZ / MLM, R22 SH: 20°F RGT: 77°F Evaporating temperature (°F) FRCC.PC.016.A1.22...
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Page 23: 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 page 39. MLZ / MLM R22 - SH 20°F... -
Page 24: 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 sufficient motor cool- ing after start-up along with proper oil return. -
Page 25: Ystem Design Recommendations
PPLICATION GUIDELINES YSTEM DESIGN RECOMMENDATIONS General Successful application of scroll compressors is de- for the system, it will operate beyond the limits pendent on careful selection of the compressor given in this manual. Poor performance, reduced for the application. If the compressor is not correct reliability, or both may result. -
Page 26: Refrigerant Charge Limit
PPLICATION GUIDELINES YSTEM DESIGN RECOMMENDATIONS Refrigerant charge limit MLZ/MLM scroll compressors can tolerate liquid Use the tables below to quickly evaluate the re- refrigerant up to a certain extend without major quired compressor protection in relation with the problems. However, excessive liquid refrigerant in system charge and the application. - Page 27 17. application envelope of the MLZ/MLM compres- sors. If a Danfoss NRV check valve is applied it has to be carefully selected for the specific operation conditions of the individual system.
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Page 28: Liquid Flood Back
PPLICATION GUIDELINES Tests for pump down cycle approval: The pump-down allows to store all the refriger- • As the pump-down switch setting is inside the ant in the high pressure side circuit. On unitary or application envelope, tests should be carried out close-coupled systems, where the system refrig- to check unexpected cut-out during transient erant charge is expected to be both correct and... -
Page 29: Pecific Application Recommendations
Head pressure control under low ambient con- when designing the discharge line. ditions: Several possible solutions are available to prevent the risk of compressor to vacuum and low For further information, please contact Danfoss. pressure differential between the suction and dis- charge pressures. Scroll and reciprocating... -
Page 30: Low Load Operations
PPLICATION GUIDELINES PECIFIC APPLICATION RECOMMENDATIONS Low load operations The compressor should be run for a minimum the motor receives enough cooling under condi- period to ensure that the oil has sufficient time to tions of lowest refrigerant mass flow. properly return to the compressor sump and that Brazed plate A brazed plate heat exchanger needs very little in- Due to the small volume of the brazed plate heat... -
Page 31: Ound And Vibration Management
MLZ/MLM 058 MLZ/MLM 066 MLZ/MLM 076 Stopping sound level MLZ/MLM have a unique discharge valve design that minimizes stopping noise. This results in very low shutdown sound. Sound generation in a Typical sound and vibration in refrigeration sys- Mechanical vibrations: These generally extend... -
Page 32: Mechanical Vibrations
25. Gas pulsation The MLZ/MLM scroll compressors have been de- pected conditions and operating configurations signed and tested to ensure that gas pulsation has to ensure that minimum gas pulsation is present. -
Page 33: Installation
The use of highly hygroscopic PVE oil in life, if the system contains solely the refrigerant MLZ compressors requires that the oil be exposed and oil it was designed for. Any other substances to the atmosphere just as little as possible. -
Page 34: Vacuum Evacuation And Moisture Removal
Air and moisture reduce service life and increase must be < 100 ppm for systems with an MLZ and condensing pressure, and cause excessively high < 300 ppm for systems with an MLM compressor. -
Page 35: Liquid Line Filter Driers
The drier recommended. must be able to reach and maintain a moisture level of 50 ppm end point dryness (EPD). Danfoss After burn out, remove & replace the liquid line recommends DCL (solid core) driers for the MLM... -
Page 36: Rdering Information And Packaging
Compressors are packed individually in a card- board 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 37 PPLICATION GUIDELINES RDERING INFORMATION AND PACKAGING Single pack Industrial pack Model Compressors Connections Features variation code 1 code 2 code 4 code 5 code 1 code 2 code 4 code 5 MLZ015 120U8058 120U8036 120U8002 120U8024 120U8057 120U8035 120U8001 120U8023 MLZ019 120U8060 120U8038...
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Page 38: Pare Parts Accessories
Pack Type Code n° Description Application Packaging size 120Z0366 Rotolock adaptor (1-1/4" ~ 3/4") MLZ 015-019-021-026 suction Multipack 120Z0367 Rotolock adaptor (1-1/4" ~ 7/8") MLZ 030-038-045-048 suction Multipack 120Z0364 Rotolock adaptor (1-3/4" ~ 1-1/8") MLZ 058-066-076 suction Multipack MLZ 015-019-021-026-030-038- 120Z0365 Rotolock adaptor (1"... -
Page 39: Crankcase Heater
Code No Description Application Packaging Size 120Z5040 Belt type crankcase heater, 70 W, 240 V, CE mark, UL (Wire MLZ/MLM 015-019-021-026-030-038-045- Multipack length: 50 in) 048-058-066-076 Belt type crankcase heater, 70 W, 400/460 V, CE mark, UL MLZ/MLM 015-019-021-026-030-038-045- 120Z5041... - Page 40 Danfoss Commercial Compressors http://www.danfoss.us 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 specifications already agreed.
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