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Danfoss MLZ/MLM090-116-130-160-200-240, Application Manuallines, Page: 62 / 64

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Danfoss MLZ/MLM090-116-130-160-200-240 Application Manuallines Download Page 62

© Danfoss | Climate Solutions | 2022.03

Quadro unit MLZ/MLZ116

The tandem is fixed on the frame by using 
grommet sleeves 

, flat washers 

, washers 

 and 

 and the grommets 

, provided in kit 

7777041.

Compressor mounting

HM10 x 100

Ø

 25

Ø

 10

Supplied with kit 7777045
Included in kit 7777041 
Not supplied

62

AB243586442698en-000601

Application Guidelines

Manifold compressors

Summary of Contents for MLZ/MLM090-116-130-160-200-240

Page 1: ...Danfoss Scroll for Refrigeration MLZ MLM090 116 130 160 200 240 R404A R507A R22 50Hz Application guidelines www cc danfoss com...

Page 2: ......

Page 3: ...Danfoss Climate Solutions 2022 03 Content Single compressors 4 Manifold compressors 44 3 AB243586442698en 000601 Application Guidelines...

Page 4: ...Motor supply 22 Compressor ambient temperature 22 Application envelope 22 Maximum discharge gas temperature 25 High and low pressure protection 26 On off cycling cycle rate limit 26 System design reco...

Page 5: ...procedure 36 Brazing material 36 Vacuum evacuation and moisture removal 37 Liquid line filter driers 37 Refrigerant charging 38 Insulation resistance and dielectric strength 38 Ordering information a...

Page 6: ...tion applications and extends Danfoss refrigeration compressors to 50 5 kW 30 HP at common voltage and with a common refrigerant R404A R22 Thanks to its dedicated refrigeration design the MLZ MLM scro...

Page 7: ...t creates compression pockets between the two scroll elements Low pressure suction gas is trapped within each crescent shaped pocket as it forms continuous motion of the orbiting scroll serves to seal...

Page 8: ...Hz ARI MBP conditions Model variation T design optimized for refrigeration Motor protection B Electronic 230 V Tubing and electrical connections C brazed connections screw terminals Q rotolock connec...

Page 9: ...29 276 2 48 1 6 7 111 MLZ130 18 27568 94062 11286 2 11 7 21 276 2 48 1 6 7 111 MLM160 22 32707 111596 14636 2 23 7 62 347 8 60 5 8 0 150 MLZ160 22 32943 112402 17124 1 92 6 56 347 8 60 5 8 0 150 MLM2...

Page 10: ...30 190 5 220 8 540 117 189 223 6 509 101 243 278 4 holes 19 05 60 180 154 230 190 5 173 30 230 HM 8 bolt Lock washer Flat washer Steel mounting sleeve Rubber grommet Nut 15 25 mm Compressor base plate...

Page 11: ...leeve Rubber grommet Nut 1 10 inch Compressor base plate 265 9 Discharge 1 1 8 Suction 1 5 8 257 4 317 5 653 618 187 301 5 214 345 4 195 170 304 8 370 8 353 212 109 183 60 60 428 279 4 76 6 4x rigid s...

Page 12: ...ressor base plate not supplied with compressor 344 Discharge A B 1 1 8 C 1 3 8 333 4 holes 25 A 690 9 B 701 9 C 726 A 618 B 629 C 653 187 A 479 5 B 490 5 C 514 7 Suction A B 1 5 8 C 2 1 8 216 159 7 87...

Page 13: ...8 212 371 304 8 181 279 4 60 90 90 30 Discharge 1 1 8 266 257 4 Suction 1 5 8 188 617 652 214 301 5 76 6 318 29 5 Without compression 28 0 With compression 531 1 2 345 279 4 183 157 4x 19 43 30 428 21...

Page 14: ...3 4 Rotolock 1 3 4 1 2 Flare 1 2 Flare Rotolock 2 1 4 Oil drain connection Flare Flare Flare 1 4 flare Low pressure gauge port Schrader Flare Flare Flare Flare 1 4 flare Oil drain connection Oil sight...

Page 15: ...s knockouts are as follows 22 5 mm PG16 UL 1 2 and 16 5 mm ISO16 x2 20 7 mm ISO20 or PG13 5 x2 MLM MLZ116 160 200 240 Black Blue Brown Faston 1 4 tabs Power supply Sump heater Module power supply M1 M...

Page 16: ...asure under stabilized ambient temperature Winding resistance varies strongly with winding temperature If the compressor is stabilized at a different value than 25 C the measured resistance must be co...

Page 17: ...ow pressure When ever possible i e PLC control it is recommended to limit the possibilities of compressor auto restart to less than 3 to 5 times during a period of 12 hours when caused by motor protec...

Page 18: ...or comprises a control module and PTC sensors embedded in the motor winding The close contact between thermistors and windings ensures a very low level of thermal inertia The motor temperature is bein...

Page 19: ...s monitoring functions are active during a 5 sec window 1 second after compressor start up power on L1 L2 L3 Compressor start Phase monitoring 0 1 s 6 s Phase sequence module logic Should one of these...

Page 20: ...nternal free volume without oil liter Low pressure side High pressure side Total MLM MLZ090 13 6 0 7 14 3 MLM MLZ116 28 8 2 5 31 3 MLM MLZ130 28 5 2 5 31 MLM MLZ160 34 1 5 39 1 MLM MLZ200 34 1 5 39 1...

Page 21: ...small temperature glide and therefore must be charged in its liquid phase but for most other aspects this small glide can be neglected Because of the small glide R404A is often called a near azeotrop...

Page 22: ...unuseful superheat Minimum and maximum evaporating and condensing temperatures as per the operating envelopes MLZ MLM compressors can be applied from 35 C to 55 C ambient temperature The compressors...

Page 23: ...ing temperature C 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 35 30 25 20 15 10 5 0 5 10 15 20 MLM090 R22 SH11K Evaporating temperature C Condensing temperature C OE 000007 MLZ090 R404A SH11K Evaporati...

Page 24: ...15 20 MLZ130 160 200 240 R404A SH11K Evaporating temperature C Condensing temperature C OE 000010 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 35 30 25 20 15 10 5 0 5 10 15 20 MLM160 200 240 R22 SH11K E...

Page 25: ...with an isolated thermocouple or thermostat attached to the discharge line 15 cm 6 inches from the compressor shell Maximum discharge gas temperature must not exceed 135 C 275 F when the compressor is...

Page 26: ...R22 R404A R507A Working pressure range high side bar g 7 7 27 7 7 1 27 7 Working pressure range low side bar g 0 7 6 2 1 0 7 2 Maximun high pressure safety switch setting bar g 29 29 Minimum low press...

Page 27: ...xceed 8 m System manufacturers should specify precautions for any applications that exceed these limits to ensure compressor reliability Piping should be designed with adequate three dimensional flexi...

Page 28: ...tarts the refrigerant evaporates abruptly under the sudden decrease of the bottom shell pressure causing the oil to foam In extreme situations this might result in too much oil leaving the compressor...

Page 29: ...stem containing a refrigerant charge in excess of the maximum recommended system charge for compressors requires a sump heater At initial start up or after power shortage it is recommended to energize...

Page 30: ...high pressure side before the system stops on the low pressure pump down switch This step reduces the amount of charge on the low side in order to prevent off cycle migration A pump down cycle repres...

Page 31: ...e controller will ensure that the fans remain off until the condensing pressure has reached a satisfactory level Variable speed fans can also be used to control the condensing pressure In water cooled...

Page 32: ...on these conditions please refer to the previous sections Due to the small volume of the brazed plate heat exchanger no pump down cycle is normally required The suction line running from the heat exc...

Page 33: ...the higher ranges which not only are easier to reduce but also do not generate the penetrating power of lower frequency sound Use of sound insulation materials on the inside of unit panels is an effec...

Page 34: ...on potentially transmitted to the frame The tubing should be designed so as to both reduce the transmission of vibrations to other structures and withstand vibration without incurring any damage Tubin...

Page 35: ...ell Always use both these rings when lifting the compressor Use lifting equipment rated and certified for the weight of the compressor A spreader bar rated for the weight of the compressor is highly r...

Page 36: ...t no electrical wiring is connected to the compressor Protect the terminal box and compressor painted surfaces from torch heat damage see diagram Use only clean refrigeration grade copper tubing and c...

Page 37: ...ers for MLZ compressors R404A with PVE oil For servicing of existing installations where acid formation may be present the Danfoss DCL solid core filter drier containing activated alumina is recommend...

Page 38: ...testing insulation resistance Danfoss recommends that the system be first operated briefly to distribute refrigerant throughout the system Following this brief operation retest the compressor for insu...

Page 39: ...tables for ordering Compressor code numbers Compressor Model Variation Connections Features Voltage code4 MLM090 L C 9 120H1774 MLM130 B C 5 120H1772 MLM160 B C 5 120H1770 MLM200 B C 5 120H1768 MLM24...

Page 40: ...cking of pallets 2 2 2 2 2 2 Shipped accessories 4 bolts per compressor Included Included Included Included Included Included 4 washers per compressor Included Included Included Included Included Incl...

Page 41: ...Description Application Packaging Pack size G07 8156132 Gasket 1 3 4 Models with 1 3 4 rotolock connection Multipack 10 G07 7956003 Gasket 1 3 4 Models with 1 3 4 rotolock connection Industry pack 50...

Page 42: ...insulation CE and UL MLM MLZ116 Multipack 6 Type Code n Description Application Packaging Pack size 7703009 Valve set V02 1 3 4 1 1 8 V04 1 1 4 3 4 MLM MLZ090 Multipack 6 7703383 Valve set V03 2 1 4...

Page 43: ...Type Code No Description Application Packaging Pack Size 7754023 POE lubricant 160SZ 1 litre can MLZ090 240 for R404A R507A Multipack 12 120Z0571 POE lubricant 160SZ 2 5 litre can MLZ090 240 for R404A...

Page 44: ...tion header 52 Oil level regulator 53 Oil separator oil reservoir 53 Oil separator and reservior for active system 54 Installation and service 55 Piping design 55 Wiring and rotation direction 55 Fail...

Page 45: ...common suction line and common discharge line The technique of mounting compressors in parallel is also referred to as manifolding In a system with only two compressors this is referred to as a tande...

Page 46: ...red mainly by the oil level regulator and the oil separator which can supply the oil when required The active system can thus accommodate itself to various oil conditions Danfoss has qualified tandem...

Page 47: ...ating ball valve Oil filter A passive system is an oil management system without any measurement or control devices such as oil level regulators and oil controllers By contrast a solution equipped wit...

Page 48: ...compressor To avoid refrigerant back flow from high pressure it is always recommended to have a non return valve on the discharge line of each compressor as well as one non return valve on the outlet...

Page 49: ...6 single compressors are also allowed for parallel assemblies For more details please refer to the MLM MLZ116 application guidelines The pump down pressure switch must have a set point slightly higher...

Page 50: ...efrost reversible defrost etc For the system which use hot gas bypass or reversible defrost method suction accumulator is necessary as a result of the possibility of a substantial quantity of liquid r...

Page 51: ...cycles If the evaporator is situated below the compressor the suction riser must be trapped to ensure the oil return to the compressor see fig 1 When the condenser is mounted at a higher position tha...

Page 52: ...temperature application suction accumulator is a must unless approved by careful tests under different operating conditions If the system use hot gas bypass or reversible defrost method suction accumu...

Page 53: ...ribution of returning refrigerant gas and oil to each individual compressor also the suction header should be installed horizontally The gas velocity in the suction header must be a maximum of 4 m s T...

Page 54: ...e configured in active solutions These systems store the oil in a common oil separator reservoir at compressor discharge pressure see the figure below The advantage is that these systems do not need a...

Page 55: ...ion height and must be horizontal so as not to trap oil Please contact Danfoss Sales for specific drawings All compressors in a manifolding unit must be electrically wired individually Compressors sho...

Page 56: ...m with passive system 7777041 1 7777045 2 Even tandem with active system 7777045 2 Even trio with active system 7777049 1 7777045 3 Even quadro with active system 7777041 2 7777045 4 Kit code number 7...

Page 57: ...d operation The system has been designed to ensure a precise pressure balancing between the sumps facilitating the oil equalization by gravity Active system Active system 50 Hz 1 1 8 1 5 8 1 5 8 1 5 8...

Page 58: ...the frame by using grommet sleeves flat washers washers and and the grommets provided in kit 7777041 HM10 x 100 25 10 Supplied with the kit 7777045 Included in kit 7777041 Not supplied The level of o...

Page 59: ...system has been designed to ensure a precise pressure balancing between the sumps facilitating the oil equalization by gravity Active system Active system 50 Hz 1 1 8 2x 1 5 8 1 5 8 3x 2 5 8 1 1 8 1...

Page 60: ...d on the frame by using grommet sleeves flat washers washers and and grommets provided in kit 7777040 Compressor mounting HM10 x 100 25 10 Supplied with kit 7777045 Included in kit 7777049 Not supplie...

Page 61: ...a precise pressure balancing between the sumps facilitating the oil equalization by gravity Active system Active system 50 Hz 1 5 8 1 3 8 1 1 8 3x 1 5 8 1 1 8 1 5 8 3x 2 5 8 Note The dimensions are e...

Page 62: ...d on the frame by using grommet sleeves flat washers washers and and the grommets provided in kit 7777041 Compressor mounting HM10 x 100 25 10 Supplied with kit 7777045 Included in kit 7777041 Not sup...

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Page 64: ...global leaders in our business and positioned us as distinct variable speed technology specialists Today we operate from engineering and manufacturing facilities spanning across three continents AB243...

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