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Danfoss MLZ Evolution A, Инструкции по применению

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Sound and vibration management

Running sound level

Stopping sound level

Sound generation in a 

refrigeration system

Compressor sound 

radiation

MLZ are designed with features to reduce the 
sound level when a compressor is running. 

Sound levels are at rated (EN12900 medium 
temperature) conditions.

MLZ have a unique discharge valve design that 
minimizes stopping noise. This results in very low 
shutdown sound.

Typical sound and vibration in refrigeration 
systems encountered by design and service 
engineers may be broken down into the 
following three source categories.

Sound radiation:

 This generally takes an 

airborne path.

Mechanical vibrations:

 These generally extend 

along the parts of the unit and structure.

Gas pulsation:

 This tends to travel through the 

cooling medium, i.e. the refrigerant.

The following sections will focus on the causes 
and methods of mitigation for each of the above 
sources.

For sound radiating from the compressor, the 
emission path is airborne and the sound waves 
are travelling directly from the machine in all 
directions.

The MLZ scroll compressors are designed to be 
quiet and the frequency of the sound generated 
is pushed into 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 effective means of substantially 
reducing the sound being transmitted to the 
outside. Ensure that no components capable 
of transmitting sound/vibration within the unit 
come into direct contact with any non insulated 
parts on the walls of the unit.
Because of the unique design of a full-suction gas 
& oil cooled motor, compressor body insulation 
across its entire operating range is possible. 

During start-up transients it is natural for the 
compressor sound level to be slightly higher 
than during normal running. MLZ scroll 
compressors exhibit very little increased start-up 
transient sound. If a 3-phase model is miswired, 
the compressor will run in reverse. Reverse 

compressor rotation is characterized by an 
objectionable sound. To correct reverse rotation, 
disconnect power and switch any two of the 
three power leads at the unit contactor. Never 
switch leads at the compressor terminals.

Starting sound level

Model

50Hz

60Hz

Sound power (dBA)

Without jacket

Sound power (dBA)

With jacket

Sound power (dBA)

Without jacket

Sound power (dBA)

With jacket

MLZ015

67

57

71

60

MLZ019

67

57

71

60

MLZ021

67

57

71

60

MLZ026

67

59

71

62

MLZ030

69

62

73

65

MLZ038

69

63

74

66

MLZ042

71

63

74

66

MLZ045

71

63

74

66

MLZ048

72

64

74

67

MLZ058

74

66

78

70

MLZ066

74

66

78

70

MLZ076

74

66

78

70

Maximum sound is +5dBA

AB243286444663en-001003

36

Application Guidelines

Содержание MLZ Evolution A

Страница 1: ...Danfoss Scroll for Refrigeration MLZ Evolution A with POE Oil 50 60 Hz R404A R507 R134a R22 R407A R407F R448A R449A R452A R513A Application guidelines www danfoss com ...

Страница 2: ......

Страница 3: ...temperature 23 Application envelope 23 Maximum discharge gas temperature 28 High and low pressure protection 29 On off cycling cycle rate limit 29 System design recommendations 30 General 30 Essential piping design considerations 30 Refrigerant charge limit 31 Off cycle migration 31 Liquid flood back 33 Specific application recommendations 34 Low ambient application 34 Scroll and reciprocating 34 ...

Страница 4: ...fer cooling capacity from 3 4 to 21kW 2 to 10HP at common voltages and frequencies as well as any of the common refrigerants R404A R507 R134a R22 R407A R407F R448A R449A R452A R513A Thanks to its dedicated refrigeration design the MLZ scroll compressor delivers a number of powerful advantages With its high efficiency motor and optimised scroll design it reduces energy cost in normal operating cond...

Страница 5: ...s 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 the pocket which decreases in volume as the pocket moves towards the centre of the scroll set with corresponding increase in gas pressure Maximum compression is achieved as the pocket reaches the discharge p...

Страница 6: ...timised for refrigeration Motor protection L Internal motor protection Tubing and electrical connections P Brazed connections spade terminals C Brazed connections screw terminals T Rotolock connections spade terminals Q Rotolock connections screws terminals Motor voltage code 1 208 230V 1 60Hz 2 200 220V 3 50Hz 208 230V 3 60Hz 4 380 415V 3 50Hz 460V 3 60Hz 5 220 240V 1 50Hz 7 575V 3 60Hz 9 380V 3 ...

Страница 7: ...48A MLZ015 2 3200 11000 1 68 1 91 6 52 33 8 2 06 5 9 208 1 1 37 31 68 MLZ019 2 5 4200 14300 2 11 1 99 6 79 43 5 2 65 7 6 268 1 1 37 31 68 MLZ021 3 4400 15000 2 23 1 97 6 73 46 2 2 82 8 0 283 1 1 37 31 68 MLZ026 3 5 5500 18700 2 78 1 97 6 72 57 1 3 48 9 9 350 1 1 37 31 68 MLZ030 4 6600 22500 3 17 2 08 7 09 68 8 4 20 12 0 424 1 6 54 37 81 MLZ038 5 7800 26600 3 64 2 14 7 30 81 0 4 94 14 1 498 1 6 54 ...

Страница 8: ...0 15800 53925 8 04 1 96 6 69 162 4 9 91 28 3 999 2 7 91 45 99 R452A MLZ015 2 3400 11500 1 71 1 97 6 72 33 8 2 06 5 9 208 1 1 37 31 68 MLZ019 2 5 4300 14700 2 17 1 99 6 80 43 5 2 65 7 6 268 1 1 37 31 68 MLZ021 3 4600 15700 2 27 2 02 6 89 46 2 2 82 8 0 283 1 1 37 31 68 MLZ026 3 5 5700 29400 2 81 2 02 6 90 57 1 3 48 9 9 350 1 1 37 31 68 MLZ030 4 6800 23400 3 27 2 10 7 18 68 8 4 20 12 0 424 1 6 54 37 ...

Страница 9: ...R448A MLZ015 2 3800 13100 1 96 1 96 6 69 33 8 2 06 7 1 251 1 1 37 31 68 MLZ019 2 5 5100 17400 2 48 2 06 7 02 43 5 2 65 9 1 321 1 1 37 31 68 MLZ021 3 5400 18400 2 62 2 06 7 03 46 2 2 82 9 7 343 1 1 37 31 68 MLZ026 3 5 6800 23200 3 21 2 12 7 23 57 1 3 48 12 0 424 1 1 37 31 68 MLZ030 4 6600 22500 3 17 2 08 7 09 68 8 4 20 14 5 512 1 6 54 37 81 MLZ038 5 8200 28100 3 72 2 22 7 56 81 0 4 94 17 0 600 1 6 ...

Страница 10: ... 91 34 1 1204 2 7 91 45 99 R452A MLZ015 2 4100 13900 2 05 1 99 6 78 33 8 2 06 7 1 251 1 1 37 31 68 MLZ019 2 5 5200 17900 2 57 2 03 6 94 43 5 2 65 9 1 321 1 1 37 31 68 MLZ021 3 5500 18800 2 70 2 05 6 99 46 2 2 82 9 70 343 1 1 37 31 68 MLZ026 3 5 6800 23300 3 34 2 04 6 97 57 1 3 48 12 0 424 1 1 37 31 68 MLZ030 4 8400 28700 3 94 2 14 7 29 68 8 4 20 14 5 512 1 6 54 37 81 MLZ038 5 9800 33300 4 55 2 15 ...

Страница 11: ...231 393 Schrader valve and cap Oil sight glass All dimensions in mm inch P T terminal box type 1 7 0 06 41 1 61 Ø 41 Ø 1 61 29 5 1 16 5 16 18 UNC self tapping Recommended torque for mounting bolts 11Nm 1Nm Ø11 Ø0 43 not supply with the grommet 239 9 40 7 50 4x Ø0 75 4x Ø19 0 Ø163 5 165 5 Discharge line Ø1 00 14UN 2A Suction line Ø1 1 4 12UN 2A Oil sight glass Schrader valve and cap 129 5 07 110 72...

Страница 12: ... 19 4 x Ø 0 75 5 27 7 50 4 64 17 16 10 27 2 20 0 74 0 43 C Q terminal box type C T1 S T2 R T3 1 7 0 06 41 1 61 Ø 41 Ø 1 61 29 5 1 16 5 16 18 UNC self tapping Recommended torque for mounting bolts 11Nm 1Nm Ø11 Ø0 43 not supply with the grommet Rotolock Brazed 121 2 4 77 suction line 95 25 134 120 3 4 73 92 0 94 0 403 2 202 4 261 Oil sight glass Schrader 435 9 19 11 34 31 45 2 239 190 Ø182 54 184 54...

Страница 13: ...4 31 45 73 190 232 9 13 7 50 4 92 125 4 x Ø 19 4 x Ø 0 75 0 74 C Q terminal box type C T1 S T2 R T3 1 7 0 06 41 1 61 Ø 41 Ø 1 61 29 5 1 16 5 16 18 UNC self tapping Recommended torque for mounting bolts 11Nm 1Nm Ø11 Ø0 43 not supply with the grommet 232 9 13 7 50 124 9 4 91 suction line 133 31 73 45 2 119 27 Ø185 Ø7 28 350 134 7 19 Suction line Ø1 3 4 12UN 2A Oil sight glass Schrader valve and cap ...

Страница 14: ...ncorporating a schrader valve Torque requirements Schrader valve core 0 6 0 2Nm 0 44 0 14lb ft Schrader valve cover 14 5 1Nm 10 7 0 7lb ft Schrader Compressor models Brazed connection size Rotolock adaptor set adaptor gasket sleeve nut Rotolock adaptor adaptor only Rotolock Solder sleeve ODF Code Number Code Number MLZ 015 019 021 026 Suction 3 4 1 1 4 3 4 120Z0126 120Z0366 Discharge 1 2 1 1 2 120...

Страница 15: ...r Care must be taken during installation to ensure that the compressor operates in the correct direction see Phase sequence and reverse rotation protection The drawings below show electrical terminal labelling and should be used as a reference when wiring the compressor For three phase applications the terminals are labelled T1 T2 and T3 For single phase applications the terminals are labelled C c...

Страница 16: ...LZ019T7 38 7 0 5 4 5 4 7 3 7 3 MLZ021T7 38 8 0 5 5 5 4 7 3 7 3 MLZ026T7 38 9 0 6 0 5 4 7 3 7 3 MLZ030T7 42 9 0 7 8 4 4 4 5 4 4 MLZ038T7 53 11 5 9 4 4 0 3 9 4 0 MLZ045T7 64 11 5 11 3 2 8 2 9 2 9 MLZ048T7 67 14 12 3 2 6 2 6 2 5 MLZ058T7 75 16 14 4 2 3 2 3 2 3 MLZ066T7 95 17 16 3 2 0 2 0 2 0 MLZ076T7 100 20 19 1 1 7 1 7 1 7 Motor voltage code 9 380V 3ph 60Hz MLZ015T9 40 7 5 6 0 3 2 4 4 4 4 MLZ019T9 5...

Страница 17: ...al starting current to the motor s start winding The current passing through the PTC causes it to heat up and at a certain temperature change to a very high resistance At this time the motor is up to nominal speed and the run capacitor determines the current through the start winding The PTC remains at high temperature and thus at high resistance as long as power is connected to the compressor Whe...

Страница 18: ...omponents for CSR wiring PSC wiring CSR wiring Run capacitor Start capacitor Relay µF µF Reference 220 240V 1 50Hz Motor voltage code 5 MLZ015 40 145 175 3ARR3 3AL RVA3EKL MLZ019 021 026 70 145 175 3ARR3 3AL RVA3EKL MLZ030 50 161 193 3ARR3 24AP RVA3EKL MLZ038 042 55 88 108 3ARR3 25AS RVA4GKL 208 230V 1 60Hz Motor voltage code 1 not provided with the compressor MLZ015 45 145 175 3ARR3 3M RVA2ACKL M...

Страница 19: ...or three phase applications the voltage measured at the compressor terminals for each phase should be within 2 of the average for all phases Phase sequence and reverse rotation protection Voltage imbalance Internal motor protection MLZ scroll compressors are equipped with an internal line break protector mounted on the motor windings The protector is an automatic reset device containing a snap act...

Страница 20: ...Danfoss Products Internal free volume at LP side without oil MLZ 015 026 1 85 litre 113 in 3 MLZ 030 048 3 44 litre 210 in 3 MLZ 058 076 6 15 litre 375 in 3 Pressure equipment directive 2014 68 EU Machinery directive 2006 42 EC annex II b Low voltage directive 2014 35 EU Electromagnetic compatibility 2014 30 EU Products MLZ 015 to 076 Refrigerating fluids Group 2 Category PED I Evaluation module n...

Страница 21: ...n HFO refrigerant with properties comparable to R404A R507 has no ozone depletion potential ODP 0 As with R404A R507 is particularly suitable for low evaporating temperature applications but it can also be used for medium evaporating temperature applications R507 is an azeotropic mixture with no temperature glide R407A and R407F are two HFC refrigerants with similar properties Both have a GWP belo...

Страница 22: ... with POE compressor could replace it As PVE oil is fully miscible with POE Danfoss recommends the POE oil RL46HB regardless of oil charge in the compressor Replacement POE RL46HB oil is available for topping up or replacing oil in the field see section Accessory Designation Composition ODP GWP Safety group Boiling temp C F Temp glide C F Critical temp C F Critical pressure bar Cond temp 26bar C F...

Страница 23: ...mperatures as per the operating envelopes MLZ compressors can be applied from 35 C 31 F to 55 C 131 F ambient temperature The compressors are designed as 100 suction gas cooled without need for additional fan cooling Ambient temperature has very little effect on the compressor performance In case of enclosed fitting and high ambient temperature it s recommend to check the temperature of power wire...

Страница 24: ... temperature F Condensing temperature C Condensing temperature F SH 11K 19 8 F SH 10K 18 F RGT 20 C 68 F MLZ015 066 R407A 5 10 15 20 25 30 35 40 45 50 55 60 65 41 50 59 68 77 86 95 104 113 122 131 140 149 30 25 20 15 10 5 0 5 10 15 22 13 4 5 14 23 32 41 50 59 Evaporating temperature C Evaporating temperature F Condensing temperature C Condensing temperature F AB243286444663en 001003 24 Application...

Страница 25: ...ature F Condensing temperature C Condensing temperature F SH 10K 18 F RGT 20 C 68 F MLZ015 066 R407F 5 10 15 20 25 30 35 40 45 50 55 60 65 30 25 20 15 10 5 0 5 10 15 Evaporating temperature C Evaporating temperature F Condensing temperature C Condensing temperature F 41 50 59 68 77 86 95 104 113 122 131 140 149 22 13 4 5 14 23 32 41 50 59 SH 10K 18 F RGT 20 C 68 F AB243286444663en 001003 25 Applic...

Страница 26: ... 50 59 41 50 59 68 77 86 95 104 113 122 131 140 149 SH 10K 18 F RGT 20 C 68 F MLZ R22 10 15 20 25 30 35 40 45 50 55 60 65 70 75 50 59 68 77 86 95 104 113 122 131 140 149 158 167 35 30 25 20 15 10 5 0 5 10 15 20 31 22 13 4 5 14 23 32 41 50 59 68 Evaporating temperature C Evaporating temperature F Condensing temperature C Condensing temperature F SH 11K 19 8 F RGT 25 C 77 F AB243286444663en 001003 2...

Страница 27: ...5 40 45 50 55 60 65 41 50 59 68 77 86 95 104 113 122 131 140 149 SH10K 18 F RGT 20 C 68 F MLZ R452A Condensing temperature C Condensing temperature F Evaporating temperature C Evaporating temperature F 35 30 25 20 15 10 5 0 5 10 15 31 22 13 4 5 14 23 32 41 50 59 5 10 15 20 25 30 35 40 45 50 55 60 65 41 50 59 68 77 86 95 104 113 122 131 140 149 SH10K 18 F RGT 20 C 68 F AB243286444663en 001003 27 Ap...

Страница 28: ...ge temperature depends mainly on the combination of evaporating temperature condensing temperature and suction gas superheat Discharge gas temperature should be controlled 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 running within the approved...

Страница 29: ... MLZ058 076 scroll compressors are not equipped with an internal pressure relief valve therefore a high pressure switch is required to shut down the compressor should the discharge pressure exceed the values shown in the table above The high pressure switch can be set to lower values depending on the application and ambient conditions The HP switch must either be placed in a lockout circuit or con...

Страница 30: ... when stopped see fig 2 The maximum elevation difference between the indoor and outdoor section cannot exceed 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 flexibility figure 2 It should not be in contact with the surrounding structure unless a proper tubin...

Страница 31: ...the risk of off cycle migration is the following Stabilize the non running system at 5 C 41 F ambient temperature Raise the ambient temperature to 20 C 68 F and keep it for 10 minutes Start the compressor and monitor sump temperature sight glass indication and sound level The presence of liquid in the crankcase can be easily detected by checking the sump level through the oil sight glass Foam in t...

Страница 32: ...ng diagrams please see to section Electrical connections Models MLZ015 048 incorporate an internal low leak check valve that is appropriate for pump down operations This valve prevents the back flow of refrigerant from the high pressure to the low pressure side through the compressor so pump down conditions can be achieved and maintained Models MLZ058 076 are not equipped with this low leak check ...

Страница 33: ...ing either the oil sump temperature or the discharge gas temperature If at any time during operations the oil sump temperature drops to within 10K 18 F or less above the saturated suction temperature or should the discharge gas temperature be less than 35K 65 F above the saturated discharge temperature this indicates liquid flood back Continuous liquid flood back can occur with a wrong dimensionin...

Страница 34: ...ight not ensure satisfactory condensing and suction pressures the use of a head pressure control valve is recommended Note This solution requires extra refrigerant charge which can introduce other problems A non return valve in the discharge line is recommended and special care should be taken when designing the discharge line For further information please contact Danfoss Low ambient start up Und...

Страница 35: ...g a brazed plate condenser heat exchanger a sufficient free volume for the discharge gas to accumulate is required in order to avoid excess pressure build up At least 1 meter of discharge line is necessary to generate this volume To help reduce the discharge gas volume immediately after start up the supply of cooling water to the heat exchanger may be opened before the compressor starts to remove ...

Страница 36: ...ing power of lower frequency sound Use of sound insulation materials on the inside of unit panels is an effective means of substantially reducing the sound being transmitted to the outside Ensure that no components capable of transmitting sound vibration within the unit come into direct contact with any non insulated parts on the walls of the unit Because of the unique design of a full suction gas...

Страница 37: ...ially 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 Tubing should also be designed for three dimensional flexibility For more information on piping design please see the section entitled Essential piping design considerations Gas pulsation The MLZ scroll compressors...

Страница 38: ...signed for Any other substances within the system will not improve performance and in most cases will be highly detrimental to system operations The presence of non condensable substances and system contaminants such as metal shavings solder and flux have a negative impact on compressor service life Many of these contaminants are small enough to pass through a mesh screen and can cause considerabl...

Страница 39: ...azing material into the joint but not into the compressor Remove all remaining flux once the joint has been soldered with a wire brush or a wet cloth Remaining flux would cause corrosion of the tubing Ensure that no flux is allowed to enter into the tubing or compressor Flux is acidic and can cause substantial damage to the internal parts of the system and compressor The POE oil used in MLZ compre...

Страница 40: ...nd storage Liquid line filter driers A properly sized type of drier is required Important selection criteria include the driers water content capacity the system refrigeration capacity and the system refrigerant charge The drier must be able to reach and maintain a moisture level of 50ppm end point dryness EPD Danfoss recommends DML 100 molecular sieve driers for MLZ compressors R404A R507 R134a R...

Страница 41: ...onnection Included Included 4 grommets per compressor Included Included 4 assemblies of self tapping US thread bolt washer sleeve per compressor Not included Included 4 sleeves per compressor Included Included Quantity for full pallets Single packs can be ordered per 1 Stacking only allowed for full pallets with identical products per pallet Made from US Danfoss pallets Optimized for overseas cont...

Страница 42: ...809 121L8815 MLZ058 T Q 9 121L8817 121L8819 121L8825 MLZ066 T Q 9 121L8827 121L8829 121L8853 MLZ076 T Q 9 121L8835 121L8837 121L8843 Compressors Model Variation Connections Features Voltage Code 1 Voltage Code 2 Voltage Code 4 Voltage Code 5 Voltage Code 9 Danfoss palette MLZ015 T T 9 121L8708 121L8710 121L8844 MLZ019 T T 9 121L8718 121L8722 121L8726 121L8730 121L8734 MLZ021 T T 9 121L8736 121L873...

Страница 43: ...120U8677 120U8645 120U8697 MLZ042 T C 9 120U8789 MLZ045 T C 9 120U8679 120U8649 120U8801 120U8699 MLZ048 T C 9 120U8681 120U8651 120U8811 120U8701 MLZ058 T C 9 120U8683 120U8653 120U8821 120U8703 MLZ066 T C 9 120U8685 120U8657 120U8831 MLZ076 T C 9 120U8687 120U8655 120U8839 Brazed version Rotolock version Compressors Model variation Connections Features Voltage code 1 Voltage code 2 Voltage code ...

Страница 44: ...6 120U8676 120U8644 120U8646 120U8696 MLZ042 T C 9 120U8788 MLZ045 T C 9 120U8678 120U8648 120U8800 120U8698 MLZ048 T C 9 120U8680 120U8650 120U8810 120U8700 MLZ058 T C 9 120U8682 120U8652 120U8820 120U8702 MLZ066 T C 9 120U8684 120U8656 120U8830 MLZ076 T C 9 120U8686 120U8654 120U8838 Brazed version Rotolock version Compressors Model variation Connections Features Voltage code 1 Voltage code 2 Vo...

Страница 45: ... 042 60HZ Motor Code 1 MLZ MLM038 Multipack 10 50μF 8173233 PSC wiring Run Capacitor 50μF 50Hz Motor Code 5 MLZ MLM030 Multipack 10 45μF 8173232 PSC wiring Run Capacitor 45μF 60Hz Motor Code 1 MLZ MLM015 019 021 Multipack 10 40μF 8173231 PSC wiring Run Capacitor 40μF 50Hz Motor Code 5 MLZ MLM015 Multipack 10 Type Code n Description Application Packaging Pack size 145 175μF 120Z0399 CSR wiring Star...

Страница 46: ...ck 50 Code n Description Application Packaging Pack size 7968004 Rotolock valve V06 1 Rotolock 1 2 ODF Discharge MLZ015 026 045 Industry pack 50 8168031 Rotolock valve V06 1 Rotolock 1 2 ODF Multipack 6 7968006 Rotolock valve V04 1 1 4 Rotolock 3 4 ODF Suction MLZ015 026 Discharge MLZ048 Industry pack 42 8168029 Rotolock valve V04 1 1 4 Rotolock 3 4 ODF Multipack 6 7968007 Rotolock valve V05 1 1 4...

Страница 47: ...LZ015 019 021 026 Multipack 6 118U0057 IP54 upgrade kit for square terminal box MLZ030 038 042 045 048 058 076 Multipack 6 Acoustic hood Terminal box Code No Description Application Packaging Pack Size 120Z5083 Acoustic hood MLZ015 019 021 026 Single pack 1 120Z5084 Acoustic hood MLZ030 038 042 045 048 Single pack 1 120Z5085 Acoustic hood MLZ058 066 076 Single pack 1 Code No Description Applicatio...

Страница 48: ...itioned us as distinct variable speed technology specialists Today we operate from engineering and manufacturing facilities spanning across three continents AB243286444663en 001003 Danfoss DCS CC 2020 06 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 ww...

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