Application guidelines

Maneurop® reciprocating
compressors MT/MTZ
50 - 60 Hz
Group 2: R22, R417A, R407A/C/F, R134a, R404A / R507, R448A / R449A, R452A, R513A
Group 1: R454C

www.danfoss.com
Application Guidelines Content

General Information......................................... 4 Refrigerants and lubricants........................... 25

General information..........................................................25
Maneurop® reciprocating compressors.......... 5 R22...........................................................................................25
Code numbers Alternatives R22, HFC retrofit.........................................25
(for ordering)..........................................................................6 R407C......................................................................................25
Compressor reference (indicated on the compressor R134a......................................................................................26
nameplate)..............................................................................6 R404A......................................................................................26
Compressor model designation......................................6 R507.........................................................................................26
R448A/R449A.......................................................................26
Specifications.................................................... 7
R454C......................................................................................27
Technical specifications......................................................7
R513A......................................................................................27
Approvals and certificates.................................................7
Hydrocarbons......................................................................27
Pressure equipment directive 2014/68/EU.................7
Low voltage directive 2014/35/EU.................................7 System design recommendations................. 28
Machinery directive 2014/30/EU....................................7 Piping design.......................................................................28
Internal free volume............................................................7 Operating limits..................................................................29
Nominal performance data for R404A and R22 .......8 Operating voltage and cycle rate.................................30
Nominal performance data for R407C and R134a....9 Liquid refrigerant control and charge limit...............30
Nominal performance data for R407A and R407F..10
Nominal performance data R448A/R449A and Sound and vibration management............... 32
R452A......................................................................................11 Sound ....................................................................................32
Nominal performance data R454C...............................12 Vibration................................................................................32
Nominal performance data R513A..............................12
Installation and service.................................. 33
Operating envelopes...................................... 13 System cleanliness.............................................................33
Discharge temperature protection..............................16 Compressor handling, mounting and connection to
Zeotropic refrigerant mixtures......................................17 the system.............................................................................33
Phase shift.............................................................................17 System pressure test.........................................................34
Temperature glide..............................................................17 Leak detection.....................................................................34
Dew temperature and Mean temperature for Vacuum pull-down moisture removal........................34
R407A/C/F.............................................................................17 Start-up..................................................................................35

Outline drawings............................................ 18 Ordering information and packaging........... 36

1 cylinder...............................................................................18 Packaging..............................................................................36
2 cylinders.............................................................................19
4 cylinders.............................................................................20

Electrical connections and wiring................. 21

Single phase electrical characteristics........................21
Nominal capacitor values and relays...........................21
Trickle circuit........................................................................21
PSC wiring.............................................................................21
CSR wiring.............................................................................21
Suggested wiring diagrams............................................22
Three phase electrical characteristics.........................23
Winding resistance............................................................23
Motor protection and suggested wiring diagrams.23
Soft starters..........................................................................24
Voltage application range...............................................24
IP rating..................................................................................24

AB196386425654en-011401 3
 Application Guidelines General Information

Danfoss receiprocating compressors are The purpose of this guideline is informational,

designed and manufactured with state of the with the intent to educate customers as to how
art technology and follow European and US the compressors should properly function.
regulations. There is an added emphasis placed If you need any additional assistance, please
on safety and reliability. Critical instructions are contact Danfoss Technichal Support. In any case,
highlighted with the following icons: Danfoss manufacturing accepts no liability as a
result of misuse or improper integration of the
This icon indicates instructions to avoid compressor unit.
safety risk.

R This icon indicates instructions to avoid

reliability risk.

4 AB196386425654en-011401
Application Guidelines Maneurop® reciprocating compressors

Maneurop® reciprocating compressors from MT and MTZ compressors have a large internal
Danfoss Commercial Compressors are specially free volume that protects against the risk of
designed for applications with a wide range of liquid hammering when liquid refrigerant enters
operating conditions. All components are of high the compressor.
quality and precision in order to assure a long
product life. MT and MTZ compressors are fully suction-
gas cooled. This means that no additional
Maneurop® MT and MTZ series compressors compressor cooling is required and allows
are of the hermetic reciprocating type and are the compressors to be insulated with acoustic
designed for medium and high evaporating jackets, to obtain lower sound levels, without the
temperature applications. risk of compressor overheating.

The positive benefits of internal motor MT and MTZ compressors are available in 16
protection, high efficiency circular valve design different models with displacement ranging from
and high torque motors provide for a quality 30 to 271 cm3/rev. Seven different motor voltage
installation. ranges are available for single and three phase
power supplies at 50 and 60 Hz. All compressors
MT & MTZ  have the same mechanical and motor are available in VE version (oil equalisation + oil
design. sight glass).

MT is charged with mineral oil while  MTZ with

polyester oil.

These compressor ranges can be used with

a large choice of refrigerants according their
compatibility with the oil.

AB196386425654en-011401 5
 Application Guidelines Compressor model designation

Code numbers
(for ordering)
Packaging type
Compressor type I : single pack
M : industrial pack
(see ordering section)
Polyolester oil
Oil equalisation port
and threaded sight glass

KBtu/h@ARI 60hz Motor voltage code*

1: 208-230V/1~/60Hz
3: 200-230V/3~/60Hz
4: 380-400 V/3~/50Hz & 460V/3~/60Hz
5: 220-240 V/1~/50Hz
6: 230 V/3~/50Hz
7: 500 V/3~/50Hz & 575V/3~/60Hz
9: 380 V/3~/60Hz
*Please consult Danfoss for motor version available

Available code numbers are listed section “Ordering information and packaging”

Compressor reference
(indicated on the com-
pressor nameplate) D
Compressor
type
Oil equalisation port
and sight glass
Polyolester oil
Generation index

KBtu/h@ARI60hz Motor voltage code*

1: 208-230V/1~/60Hz
3: 200-230V/3~/60 Hz
4: 380-400V/3~/50Hz & 460V/3~/60Hz
Displacement code 5: 220-240V/1~/50Hz
6: 230V/3~/50Hz
7: 500V/3~/50Hz & 575V/3~/60Hz
9: 380V/3~/60Hz
*Please consult Danfoss for motor version available

6 AB196386425654en-011401
Application Guidelines Specifications

Technical specifications
Displacement Oil Net Available motor voltage codes
Compressor Cyl. charge weight
model m3/h at number
Code cm /rev
3
dm3 kg 1 3 4 5 6 7 9
2900 rpm
MT/MTZ018 JA 30.23 5.26 1 0.95 21 ● ● ● ● - - -
MT/MTZ022 JC 38.12 6.63 1 0.95 21 ● ● ● ● ● - ●
MT/MTZ028 JE 48.06 8.36 1 0.95 23 ● ● ● ● ● - ○
MT/MTZ032 JF 53.86 9.37 1 0.95 24 ● ● ● ● ● ○ ●
MT/MTZ036 JG 60.47 10.52 1 0.95 24 ● ● ● ● ● ○ ○
MT/MTZ040 JH 67.89 11.81 1 0.95 24 ● ● ● - ● - -
MT/MTZ044 HJ 76.22 13.26 2 1.8 35 ○ ● ● - ○ ○ ●
MT/MTZ050 HK 85.64 14.90 2 1.8 35 ● ● ● - ● ○ ●
MT/MTZ056 HL 96.13 16.73 2 1.8 37 ● ● ● - ● ● ●
MT/MTZ064 HM 107.71 18.74 2 1.8 37 ● ● ● - ● - ●
MT/MTZ072 HN 120.94 21.04 2 1.8 40 - ● ● - ○ - ●
MT/MTZ080 HP 135.78 23.63 2 1.8 40 - ● ● - ● - ●
MT/MTZ100 HS 171.26 29.80 4 3.9 60 - ● ● - ● ● ●
MT/MTZ125 HU 215.44 37.49 4 3.9 64 - ● ● - ● ● ●
MT/MTZ144 HV 241.87 42.09 4 3.9 67 - ● ● - ● ● ●
MT/MTZ160 HW 271.55 47.25 4 3.9 67 - ● ● - ● ● ●
● Available in MT and MTZ ○ Available in MTZ only

Approvals and certificates Maneurop® MT/MTZ compressors comply with Other certificates/approvals please contact
the following approvals and certificates. Danfoss

CE (European Directive) All models

UL
All 60 Hz models
(Underwriters Laboratories)
CCC 
All models code 4 and 5 under CCC scope.
(China Compulsory Product Certification)

EAC Eurasian conformity mark All models voltage code 4 and 5

Pressure equipment di- Products MT/MTZ 018 to 040 MT/MTZ 018 to 040** MT/MTZ 044 to 160
rective 2014/68/EU Refrigerating fluids* Group 2 Group 1 Group 2
Category PED I II II
Evaluation module no scope D1 D1
Maximum/minimum allowable 50°C > Ts > -35°C 50°C > Ts > -35°C 50°C > Ts > -35°C
temperature - TS
MT maximum allowable pressure - PS 18.4 bar(g) 18.4 bar(g) 18.4 bar(g)
MTZ maximum allowable pressure - PS 22.6 bar(g) 22.6 bar(g) 22.6 bar(g)
* According to the PED classification Group1 contains hazardous fluids e.g. flammable, while Group 2 all other fluids
** Only motor code 4 and 5

Low voltage directive Products MT/MTZ 018 to 040 MT/MTZ 044 to 160
2014/35/EU
Manufacturer's declaration contact Danfoss contact Danfoss

Machinery directive Products MT/MTZ 018 to 040 MT/MTZ 044 to 160

2014/30/EU
Manufacturer's declaration contact Danfoss contact Danfoss

Internal free volume Volume (litre)

Products
Low side High side
1 cyl. 7.76 0.28
2 cyl. 17.13 0.63
4 cyl. 32.2 1.20

AB196386425654en-011401 7
 Application Guidelines Specifications

Nominal performance data for R404A and R22

R404A Refrigeration
50 Hz, EN12900 ratings 50 Hz, ARI ratings 60 Hz, ARI ratings
To = -10°C, Tc = 45°C, SC = 0K, SH = 10K To = -6.7°C, Tc = 48.9°C, SC = 0K, SH = 11.1K To = -6.7°C, Tc = 48.9°C, SC = 0K, SH = 11.1K
Compressor
model Cooling Power Current Cooling Power Current Cooling Power Current
C.O.P. E.E.R. E.E.R.
capacity input input capacity input input capacity input input
W/W Btu.h/W Btu.h/W
W kW A W kW A W kW A
MTZ018-4* 1910 1.21 2.73 1.58 2070 1.31 2.86 5.39 2630 1.76 2.86 5.10
MTZ022-4* 2630 1.48 3.06 1.77 2830 1.62 3.24 5.96 3600 2.05 3.27 5.99
MTZ028-4* 3430 1.96 4.04 1.75 3690 2.14 4.30 5.88 4680 2.68 4.23 5.96
MTZ032-4* 3980 2.16 4.25 1.84 4260 2.37 4.56 6.13 5110 2.98 4.56 5.85
MTZ036-4* 4670 2.58 4.95 1.81 4990 2.83 5.33 6.02 5900 3.33 5.09 6.05
MTZ040-4* 5330 2.95 5.87 1.81 5680 3.24 6.29 5.98 6740 3.76 5.88 6.12
MTZ044-4* 5370 2.78 5.35 1.93 5780 3.02 5.67 6.53 7110 3.85 5.85 6.30
MTZ050-4* 6260 3.22 5.95 1.94 6700 3.50 6.33 6.53 8360 4.42 6.53 6.46
MTZ056-4* 6710 3.51 6.83 1.91 7250 3.85 7.25 6.43 9490 4.98 7.52 6.50
MTZ064-4* 7980 4.20 7.82 1.90 8590 4.60 8.35 6.37 10540 5.67 8.31 6.34
MTZ072-4* 8920 4.69 8.95 1.90 9570 5.11 9.50 6.39 11960 6.53 9.73 6.25
MTZ080-4* 10470 5.61 10.20 1.87 11180 6.14 10.94 6.21 13610 7.81 11.35 5.95
MTZ100-4* 12280 6.76 12.21 1.82 13170 7.35 12.94 6.12 15480 8.72 12.79 6.06
MTZ125-4* 15710 8.44 14.69 1.86 16800 9.22 15.82 6.22 19970 11.37 16.41 5.99
MTZ144-4* 18490 9.78 16.77 1.89 19690 10.66 17.99 6.30 23540 12.99 18.47 6.18
MTZ160-4* 20310 11.08 18.80 1.83 21660 12.09 20.22 6.11 25570 14.73 20.77 5.92
* 50 Hz, EN12900 data for indicated models are Asercom certified R404A data are also valid for refrigerant R507

R22 Refrigeration Air Conditioning

50 Hz, EN12900 ratings 50 Hz, ARI ratings 60 Hz, ARI ratings
To = -10°C, Tc = 45°C, SC = 0K, SH = 10K To = 7.2°C, Tc = 54.4°C, SC = 8.3K, SH = 11.1K To = 7.2°C, Tc = 54.4°C, SC = 8.3K, SH = 11.1K
Compressor
model Cooling Power Current Cooling Power Current Cooling Power Current
C.O.P. E.E.R. E.E.R.
capacity input input capacity input input capacity input input
W/W Btu.h/W Btu.h/W
W kW A W kW A W kW A
MT018-4 1690 1.00 2.27 1.69 3880 1.45 2.73 9.13 4660 1.74 2.73 9.14
MT022-4 2490 1.29 2.55 1.94 5360 1.89 3.31 9.68 6440 2.27 3.31 9.68
MT028-4 3730 1.81 3.59 2.06 7380 2.55 4.56 9.88 8850 3.06 4.56 9.87
MT032-4 3950 2.11 3.73 1.87 8060 2.98 4.97 9.23 9680 3.58 4.97 9.23
MT036-4 4810 2.35 4.30 2.04 9270 3.37 5.77 9.39 11130 4.05 5.77 9.38
MT040-4 5220 2.67 4.86 1.95 10480 3.86 6.47 9.27 12570 4.63 6.47 9.27
MT044-4 4860 2.46 5.02 1.98 10520 3.53 6.37 10.17 12890 4.32 6.42 10.18
MT050-4 5870 2.94 5.53 2.00 12230 4.19 7.20 9.96 14690 5.04 7.26 9.95
MT056-4 6450 3.18 6.39 2.03 13750 4.58 8.19 10.25 16520 5.58 8.23 10.10
MT064-4 7750 3.64 7.03 2.13 15730 5.27 9.16 10.19 18850 6.32 9.33 10.18
MT072-4 8710 4.19 8.48 2.08 18200 6.12 10.98 10.15 21840 7.33 10.77 10.17
MT080-4 10360 4.89 9.52 2.12 20740 7.08 12.48 10.00 24890 8.50 12.34 9.99
MT100-4 11330 5.79 11.82 1.96 23400 7.98 14.59 10.01 28080 9.58 14.59 10.00
MT125-4 15260 7.55 12.28 2.02 30430 10.66 17.37 9.74 36520 12.80 17.37 9.74
MT144-4 17280 8.47 17.06 2.04 34340 11.96 22.75 9.80 41210 14.35 22.75 9.80
MT160-4 19190 9.49 16.81 2.02 38270 13.40 22.16 9.75 45930 16.08 22.16 9.75
To: Evaporating temperature at dew point (saturated suction temperature)
Tc: Condensing temperature at dew point (saturated discharge temperature)
SC: Subcooling
SH: Superheat

ARI capacity and power input data are +/- 5%

Asercom: Association of European Refrigeration Compressor and Controls Manufacturers
ARI: Air Conditioning and Refrigeration Institute

8 AB196386425654en-011401
Application Guidelines Specifications

Nominal performance data for R407C and R134a

R407C Air Conditioning
50 Hz, EN12900 ratings 50 Hz, ARI ratings 60 Hz, ARI ratings
To = 5°C, Tc = 50°C, SC = 0K, SH = 10K To = 7.2°C, Tc = 54.4°C, SC = 8.3K, SH = 11.1K To = 7.2°C, Tc = 54.4°C, SC = 8.3K, SH = 11.1K
Compressor
model Cooling Power Current Cooling Power Current Cooling Power Current
C.O.P. E.E.R. E.E.R.
capacity input input capacity input input capacity input input
W/W Btu.h/W Btu.h/W
W kW A W kW A W kW A
MTZ018-4* 3470 1.27 2.73 2.73 3850 1.38 2.86 9.52 5050 1.73 2.82 9.96
MTZ022-4* 4550 1.71 3.27 2.67 5020 1.86 3.47 9.21 6280 2.26 3.45 9.48
MTZ028-4* 5890 2.17 4.30 2.72 6540 2.36 4.57 9.46 8220 2.82 4.41 9.95
MTZ032-4* 6650 2.43 4.57 2.74 7330 2.66 4.90 9.40 9000 3.20 4.80 9.60
MTZ036-4* 7510 2.93 5.58 2.56 8280 3.21 5.99 8.80 9990 3.90 5.78 8.74
MTZ040-4* 8660 3.40 6.46 2.55 9580 3.71 6.92 8.81 11720 4.46 6.69 8.97
MTZ044-4* 9130 3.12 5.84 2.93 10100 3.38 6.18 10.20 12730 4.25 6.34 10.22
MTZ050-4* 10420 3.69 6.51 2.83 11530 4.01 6.95 9.81 14110 4.87 7.06 9.89
MTZ056-4* 11680 4.02 7.45 2.90 13000 4.37 7.91 10.15 16050 5.40 8.03 10.14
MTZ064-4* 13360 4.61 8.35 2.90 14850 5.02 8.91 10.10 18090 6.14 9.01 10.06
MTZ072-4* 15320 5.42 9.85 2.83 17050 5.87 10.48 9.91 20780 7.30 10.61 9.72
MTZ080-4* 17380 6.29 11.31 2.76 19330 6.83 12.08 9.66 22870 8.24 11.99 9.47
MTZ100-4* 20480 7.38 13.05 2.78 22700 8.00 13.83 9.68 28230 9.86 14.22 9.77
MTZ125-4* 26880 9.48 16.12 2.84 29780 10.33 17.33 9.84 35620 12.83 19.24 9.48
MTZ144-4* 29770 10.68 18.07 2.79 33060 11.59 19.35 9.74 40900 14.42 20.40 9.68
MTZ160-4* 34090 12.41 20.68 2.75 37820 13.46 22.14 9.59 45220 16.64 23.13 9.27
* 50 Hz, EN12900 data for indicated models are Asercom certified

R134a Refrigeration Air Conditioning

50 Hz, EN12900 ratings 50 Hz, ARI ratings 60 Hz, ARI ratings
To = -10°C, Tc = 45°C, SC = 0K , SH = 10K To = 7.2°C, Tc = 54.4°C, SC = 8.3K, SH = 11.1K To = 7.2°C, Tc = 54.4°C, SC = 8.3K, SH = 11.1K
Compressor
model Cooling Power Current Cooling Power Current Cooling Power Current
C.O.P. E.E.R. E.E.R.
capacity input input capacity input input capacity input input
W/W Btu.h/W Btu.h/W
W kW A W kW A W kW A
MTZ018-4 1075 0.69 1.92 1.56 2532 0.99 2.19 8.74 3038 1.19 2.29 8.74
MTZ022-4 1408 0.82 2.16 1.73 3335 1.20 2.51 9.52 4001 1.44 2.62 9.52
MTZ028-4 1823 1.02 2.83 1.79 4217 1.53 3.30 9.39 5061 1.84 3.44 9.39
MTZ032-4 2076 1.25 3.33 1.66 4907 1.87 3.94 8.94 5889 2.25 4.11 8.94
MTZ036-4 2753 1.45 3.32 1.90 6013 2.13 4.09 9.62 7216 2.56 4.26 9.62
MTZ040-4 2914 1.61 3.81 1.81 6342 2.33 4.89 9.28 7610 2.80 5.10 9.28
MTZ044-4 2926 1.49 4.05 1.96 6836 2.22 4.73 10.51 8203 2.66 4.93 10.51
MTZ050-4 3364 1.80 4.32 1.87 7956 2.63 5.20 10.31 9547 3.16 5.42 10.31
MTZ056-4 3526 1.88 5.31 1.87 8621 2.85 6.17 10.34 10346 3.41 6.44 10.34
MTZ064-4 4192 2.17 5.71 1.94 10057 3.26 6.81 10.51 12069 3.92 7.10 10.51
MTZ072-4 4873 2.50 6.67 1.95 11543 3.78 7.99 10.41 13852 4.54 8.33 10.41
MTZ080-4 5857 2.93 7.22 2.00 13262 4.35 8.83 10.41 15915 5.23 9.21 10.41
MTZ100-4 6617 3.65 8.67 1.82 15452 5.28 10.24 10.00 18542 6.34 10.68 10.00
MTZ125-4 8306 4.17 8.89 1.99 18941 6.29 11.50 10.27 22729 7.55 11.99 10.27
MTZ144-4 10732 5.40 11.35 1.99 23536 7.83 14.19 10.27 28243 9.39 14.80 10.27
MTZ160-4 11900 5.84 11.71 2.04 25779 8.57 15.11 10.27 30935 10.29 15.76 10.27
To: Evaporating temperature at dew point (saturated suction temperature)
Tc: Condensing temperature at dew point (saturated discharge temperature)
SC: Subcooling
SH: Superheat

ARI capacity and power input data are +/- 5%

Asercom: Association of European Refrigeration Compressor and Controls Manufacturers
ARI: Air Conditioning and Refrigeration Institute

AB196386425654en-011401 9
 Application Guidelines Specifications

Nominal performance data for R407A and R407F

R407A Refrigeration
50 Hz, EN12900 ratings 50 Hz, ARI ratings 60 Hz, ARI ratings
To = -10°C, Tc = 45°C, SC = 0K, SH = 10K To = -6.7°C, Tc = 48.9°C, SC = 0K, SH = 11.1K To = -6.7°C, Tc = 48.9°C, SC = 0K, SH = 11.1K
Compressor
model Cooling Power Current Cooling Power Current Cooling Power Current
C.O.P. E.E.R. E.E.R.
capacity input input capacity input input capacity input input
W/W Btu.h/W Btu.h/W
W kW A W kW A W kW A
MTZ018-4 1740 1.02 2.46 1.70 1940 1.12 2.58 5.91 2330 1.35 2.69 5.89
MTZ022-4 2390 1.26 2.75 1.90 2650 1.39 2.91 6.51 3180 1.67 3.04 6.50
MTZ028-4 3130 1.67 3.63 1.88 3470 1.85 3.87 6.40 4160 2.22 4.04 6.40
MTZ032-4 3640 1.84 3.82 1.98 4000 2.04 4.10 6.69 4800 2.53 4.28 6.48
MTZ036-4 4260 2.19 4.45 1.95 4670 2.43 4.80 6.56 5600 2.92 5.00 6.55
MTZ040-4 4890 2.51 5.28 1.94 5340 2.80 5.67 6.51 6410 3.36 5.91 6.51
MTZ044-4 4890 2.36 4.81 2.08 5410 2.60 5.11 7.10 6500 3.12 5.33 7.11
MTZ050-4 5700 2.73 5.35 2.09 6280 3.01 5.69 7.12 7530 3.61 5.94 7.12
MTZ056-4 6120 2.98 6.14 2.05 6790 3.30 6.53 7.02 8140 3.96 6.81 7.02
MTZ064-4 7270 3.57 7.04 2.04 8040 3.95 7.51 6.95 9650 4.75 7.83 6.93
MTZ072-4 8130 3.98 8.05 2.04 8960 4.40 8.55 6.95 10760 5.28 8.92 6.96
MTZ080-4 9540 4.76 9.17 2.00 10470 5.28 9.85 6.77 12570 6.33 10.27 6.78
MTZ100-4 11200 5.74 10.98 1.95 12320 6.32 11.65 6.65 14790 7.58 12.15 6.66
MTZ125-4 14330 7.17 13.21 2.00 15740 7.93 14.24 6.77 18890 9.51 14.86 6.78
MTZ144-4 16870 8.32 15.08 2.03 18460 9.18 16.19 6.86 22150 11.02 16.89 6.86
MTZ160-4 18520 9.42 16.91 1.97 20300 10.43 18.20 6.64 24360 12.51 18.99 6.65
To: Evaporating temperature at dew point (saturated suction temperature)
Tc: Condensing temperature at dew point (saturated discharge temperature)
SC: Subcooling
SH: Superheat

R407F Refrigeration
50 Hz, EN12900 ratings 50 Hz, ARI ratings 60 Hz, ARI ratings
To = -10°C, Tc = 45°C, SC = 0K, SH = 10K To = -6.7°C, Tc = 48.9°C, SC = 0K, SH = 11.1K To = -6.7°C, Tc = 48.9°C, SC = 0K, SH = 11.1K
Compressor
model Cooling Power Current Cooling Power Current Cooling Power Current
C.O.P. E.E.R. E.E.R.
capacity input input capacity input input capacity input input
W/W Btu.h/W Btu.h/W
W kW A W kW A W kW A
MTZ018-4 1850 1.08 2.53 1.71 2080 1.19 2.66 5.97 2500 1.43 2.77 5.97
MTZ022-4 2540 1.33 2.83 1.91 2840 1.48 3.01 6.55 3410 1.77 3.14 6.58
MTZ028-4 3320 1.76 3.74 1.89 3710 1.96 4.00 6.46 4450 2.35 4.17 6.46
MTZ032-4 3860 1.94 3.93 1.99 4280 2.16 4.24 6.76 5130 2.59 4.42 6.76
MTZ036-4 4520 2.32 4.58 1.95 5010 2.58 4.95 6.63 6010 3.10 5.17 6.62
MTZ040-4 5170 2.65 5.43 1.95 5700 2.96 5.85 6.57 6840 3.55 6.10 6.58
MTZ044-4 5200 2.49 4.95 2.09 5810 2.76 5.28 7.18 6970 3.31 5.50 7.19
MTZ050-4 6060 2.90 5.50 2.09 6730 3.20 5.88 7.18 8080 3.85 6.13 7.16
MTZ056-4 6500 3.16 6.31 2.06 7270 3.51 6.74 7.07 8730 4.21 7.03 7.08
MTZ064-4 7730 3.78 7.23 2.05 8620 4.19 7.76 7.02 10340 5.03 8.09 7.02
MTZ072-4 8640 4.21 8.27 2.05 9610 4.66 8.84 7.04 11530 5.60 9.22 7.03
MTZ080-4 10140 5.04 9.43 2.01 11230 5.60 10.18 6.84 13470 6.72 10.61 6.84
MTZ100-4 11900 6.07 11.28 1.96 13220 6.71 12.04 6.72 15870 8.05 12.55 6.73
MTZ125-4 15220 7.58 13.58 2.01 16870 8.41 14.72 6.85 20240 10.09 15.35 6.85
MTZ144-4 17910 8.78 15.50 2.04 19770 9.72 16.73 6.94 23730 11.66 17.45 6.95
MTZ160-4 19670 9.95 17.38 1.98 21740 11.03 18.81 6.73 26090 13.24 19.62 6.73
To: Evaporating temperature at dew point (saturated suction temperature)
Tc: Condensing temperature at dew point (saturated discharge temperature)
SC: Subcooling
SH: Superheat

Asercom: Association of European Refrigeration Compressor and Controls Manufacturers

ARI: Air Conditioning and Refrigeration Institute

10 AB196386425654en-011401
Application Guidelines Specifications

Nominal performance data R448A/R449A and R452A

R448A/R449A Refrigeration
50 Hz, EN12900 ratings 50 Hz, ARI ratings 60 Hz, ARI ratings
To = -10°C, Tc = 45°C, SC = 0K, SH = 10K To = -6.7°C, Tc = 48.9°C, SC = 0K, SH = 11.1K To = -6.7°C, Tc = 48.9°C, SC = 0K, SH = 11.1K
Compressor
model Cooling Power Current Cooling Power Current Cooling Power Current
C.O.P. E.E.R. E.E.R.
capacity input input capacity input input capacity input input
W/W Btu.h/W Btu.h/W
W kW A W kW A W kW A
MTZ018-4 1840 1.04 2.55 1.77 2030 1.14 2.66 6.08 2430 1.36 2.78 6.10
MTZ022-4 2580 1.37 2.86 1.88 2820 1.52 3.03 6.33 3380 1.82 3.16 6.34
MTZ028-4 3180 1.69 3.85 1.89 3480 1.87 4.07 6.35 4170 2.24 4.25 6.35
MTZ032-4 3660 1.87 3.68 1.96 3970 2.08 3.97 6.51 4770 2.49 4.14 6.54
MTZ036-4 4250 2.24 4.65 1.90 4650 2.48 4.97 6.40 5580 2.98 5.18 6.39
MTZ040-4 4880 2.62 5.87 1.86 5340 2.90 6.27 6.28 6410 3.48 6.54 6.29
MTZ044-4 5010 2.49 4.94 2.01 5500 2.74 5.25 6.85 6600 3.28 5.48 6.87
MTZ050-4 5700 2.87 5.41 1.98 6310 3.18 5.74 6.77 7570 3.82 5.99 6.76
MTZ056-4 6340 3.16 6.53 2.00 7010 3.50 6.93 6.84 8410 4.20 7.23 6.83
MTZ064-4 7330 3.62 7.05 2.02 8040 4.01 7.56 6.84 9650 4.81 7.89 6.85
MTZ072-4 8440 4.20 8.80 2.01 9260 4.64 9.44 6.81 11110 5.57 9.85 6.81
MTZ080-4 10010 4.97 9.66 2.02 10930 5.48 10.34 6.81 13120 6.57 10.79 6.82
MTZ100-4 11310 5.79 10.99 1.95 12430 6.37 11.66 6.66 14910 7.65 12.17 6.65
MTZ125-4 15220 7.45 13.24 2.04 16720 8.19 14.06 6.97 20060 9.88 14.67 6.93
MTZ144-4 17560 8.63 15.45 2.03 19040 9.50 16.69 6.84 22850 11.40 17.40 6.84
MTZ160-4 20140 9.87 17.11 2.04 21830 10.87 18.48 6.85 26200 13.04 19.27 6.86
To: Evaporating temperature at dew point (saturated suction temperature)
Tc: Condensing temperature at dew point (saturated discharge temperature)
SC: Subcooling
SH: Superheat

R452A Refrigeration
50 Hz, EN12900 ratings 50 Hz, ARI ratings 60 Hz, ARI ratings
To = -10°C, Tc = 45°C, SC = 0K, SH = 10K To = -6.7°C, Tc = 48.9°C, SC = 0K, SH = 11.1K To = -6.7°C, Tc = 48.9°C, SC = 0K, SH = 11.1K
Compressor
model Cooling Power Current Cooling Power Current Cooling Power Current
C.O.P. E.E.R. E.E.R.
capacity input input capacity input input capacity input input
W/W Btu.h/W Btu.h/W
W kW A W kW A W kW A
MTZ018-4 2000 1.15 2.65 1.74 2150 1.25 2.77 5.87 2580 1.49 2.88 5.91
MTZ022-4 2810 1.51 2.98 1.86 3010 1.65 3.15 6.23 3610 1.98 3.29 6.22
MTZ028-4 3250 1.86 4.00 1.75 3480 2.03 4.23 5.85 4170 2.44 4.41 5.83
MTZ032-4 3790 2.06 3.83 1.84 4060 2.27 4.13 6.10 4870 2.73 4.31 6.09
MTZ036-4 4300 2.48 4.84 1.74 4610 2.72 5.17 5.78 5530 3.26 5.39 5.79
MTZ040-4 5090 2.89 6.11 1.76 5470 3.18 6.52 5.87 6560 3.81 6.80 5.88
MTZ044-4 5370 2.73 5.24 1.96 5780 2.98 5.55 6.62 6940 3.58 5.79 6.62
MTZ050-4 6110 3.16 5.74 1.93 6630 3.47 6.07 6.52 7960 4.16 6.33 6.53
MTZ056-4 6790 3.48 6.93 1.95 7370 3.82 7.33 6.58 8850 4.58 7.64 6.59
MTZ064-4 7840 3.98 7.48 1.97 8450 4.36 8.00 6.61 10140 5.24 8.34 6.60
MTZ072-4 9020 4.61 9.34 1.96 9730 5.06 9.98 6.56 11670 6.07 10.41 6.56
MTZ080-4 9680 5.26 10.04 1.84 10390 5.75 10.72 6.17 12470 6.90 11.18 6.17
MTZ100-4 12310 6.37 11.68 1.93 13270 6.97 12.42 6.50 15930 8.37 12.96 6.50
MTZ125-4 16070 8.19 14.09 1.96 17330 8.96 14.98 6.60 20790 10.75 15.62 6.60
MTZ144-4 17830 9.58 16.44 1.86 18950 10.46 17.77 6.18 22740 12.55 18.54 6.18
MTZ160-4 19880 10.80 18.20 1.84 21130 11.80 19.68 6.11 25360 14.16 20.52 6.11
To: Evaporating temperature at dew point (saturated suction temperature)
Tc: Condensing temperature at dew point (saturated discharge temperature)
SC: Subcooling
SH: Superheat

AB196386425654en-011401 11
 Application Guidelines Specifications

Nominal performance data R454C

R454C Refrigeration
50 Hz, EN12900 ratings 50 Hz, ARI ratings 60 Hz, ARI ratings
To = -10°C, Tc = 45°C , SC = 0K , SH = 10K 50 Hz To = -6.7°C, Tc = 48.9°C, SC = 0K, SH = 11.1K To = -6.7°C, Tc = 48.9°C, SC = 0K, SH = 11.1K
Compressor
model Cooling Power Current Cooling Power Current Cooling Power Current
C.O.P. E.E.R. E.E.R.
capacity input input capacity input input capacity input input
W/W Btu.h/W Btu.h/W
W kW A W kW A W kW A
MTZ018-4 1569 0.87 2.28 1.8 1734 0.96 2.36 6.19 2110 1.16 2.24 6.22
MTZ022-4 2108 1.16 2.39 1.82 2309 1.28 2.53 6.16 2909 1.64 2.64 6.06
MTZ028-4 2768 1.49 3.75 1.85 3646 1.84 3.61 6.77 3992 2.09 3.81 6.52
MTZ032-4 3317 1.67 3.37 1.99 3021 1.63 3.93 6.32 4763 2.29 3.61 7.11
MTZ036-4 3722 1.97 4.43 1.89 4132 2.17 4.69 6.49 5325 2.73 4.63 6.64
MTZ040-4 4479 2.33 5.3 1.92 4918 2.59 5.64 6.49 6072 3.1 5.41 6.67
To: Evaporating temperature at dew point (saturated suction temperature)
Tc: Condensing temperature at dew point (saturated discharge temperature)
SC: Subcooling
SH: Superheat

Nominal performance data R513A

R513A Refrigeration Air Conditioning
50 Hz, EN12900 ratings 50 Hz, ARI ratings 60 Hz, ARI ratings
To = -10°C, Tc = 45°C , SC = 0K , SH = 10K To = 7.2°C, Tc = 54.4°C , SC = 8.3K , SH = 11.1K To = 7.2 °C, Tc = 54.4°C , SC = 8.3K , SH = 11.1K
Compressor
model Cooling Power Current Cooling Power Current Cooling Power Current
C.O.P. E.E.R. E.E.R.
capacity input input capacity input input capacity input input
W/W Btu.h/W Btu.h/W
W kW A W kW A W kW A
MTZ018-4 1181 0.74 2.37 1.60 2757 1.03 2.63 9.15 3395 1.23 2.40 9.45
MTZ022-4 1546 0.88 2.13 1.76 3526 1.26 2.53 9.56 4425 1.58 2.57 9.56
MTZ028-4 1949 1.14 3.32 1.71 4426 1.64 3.77 9.22 5608 2.02 3.59 9.49
MTZ032-4 2318 1.27 2.90 1.83 5107 1.84 3.60 9.45 6543 2.30 3.60 9.73
MTZ036-4 2670 1.47 3.70 1.81 6010 2.12 4.59 9.66 7145 2.59 4.51 9.42
MTZ040-4 3169 1.78 4.74 1.78 6888 2.53 5.62 9.28 8288 2.99 5.28 9.45
MTZ044-4 3183 1.68 4.13 1.89 7380 2.40 4.84 10.51 8915 2.94 4.82 10.38
MTZ050-4 3621 1.90 4.30 1.91 8085 2.73 5.27 10.10 9735 3.42 5.62 9.73
MTZ056-4 3822 2.05 5.27 1.87 8894 2.97 6.28 10.20 11241 3.80 6.19 10.10
MTZ064-4 4419 2.34 5.70 1.89 10141 3.44 6.91 10.07 12580 4.34 6.91 9.90
MTZ072-4 5037 2.70 7.05 1.87 11436 3.95 8.35 9.90 14046 4.97 8.12 9.66
MTZ080-4 5700 3.09 7.27 1.85 12963 4.54 8.86 9.73 16031 5.76 9.02 9.52
MTZ100-4 7150 3.91 8.96 1.83 15950 5.53 10.65 9.86 19397 6.72 10.54 9.86
MTZ125-4 9614 4.81 9.73 2.00 21058 7.00 12.58 10.27 25367 8.69 13.03 9.97
MTZ144-4 10999 5.60 11.70 1.96 23855 8.10 14.64 10.07 28791 9.98 15.04 9.86
MTZ160-4 12490 6.38 12.63 1.96 26641 9.26 16.28 9.83 31756 11.57 16.80 9.39
To: Evaporating temperature at dew point (saturated suction temperature)
Tc: Condensing temperature at dew point (saturated discharge temperature)
SC: Subcooling
SH: Superheat

ARI capacity and power input data are +/- 5%

Asercom: Association of European Refrigeration Compressor and Controls Manufacturers
ARI: Air Conditioning and Refrigeration Institute

12 AB196386425654en-011401
Application Guidelines Operating envelopes

R The operating envelopes for MT and MTZ compressors are given in the figures below and
guarantees reliable operations of the compressor for steady-state operation.

MT - R22 - R417A

MTZ - R407C at DEW point

70
65
Condensing temperature (°C)

60
S.H. = 11.1 K
55
S.H. = 30 K
50
45
40
35
30
-30 -25 -20 -15 -10 -5 0 5 10 15 20
Evaporating temperature (°C)

MTZ - R134a
75
70
65
Condensing temperature (°C)

60
55
50 MTZ R134a
45 SH 10K
40 RGT 20°C

35
30
-30 -25 -20 -15 -10 -5 0 5 10 15 20
Evaporating temperature (°C)

MTZ - R404A / R507

AB196386425654en-011401 13
 Application Guidelines Operating envelopes

MTZ – R407A at Dew Point

SH 10K

RGT 20°C

MTZ – R407F at Dew Point

SH 10K

RGT 20°C

MTZ – R448A/R449A
70
65
60
55 SH 10K

50
45 RGT 20°C

40
35
30
25
20
15
10
5
0
-35 -30 -25 -20 -15 -10 -5 0 5 10 15

SH10K RGT20

14 AB196386425654en-011401
Application Guidelines Operating envelopes

MTZ – R452A
70
65
60
SH 10K
55
50
45 RGT 20°C

40
35
30
25
20
15
10
5
0
-35 -30 -25 -20 -15 -10 -5 0 5 10 15

SH10K RGT20

MTZ – R454C

70
65
60
55 SH 10K

50
RGT 20°C
45
40
35
30
25
20
15
10
5
0
-35 -30 -25 -20 -15 -10 -5 0 5 10 15

SH10K RGT20°C

AB196386425654en-011401 15
 Application Guidelines

MTZ – R513A
80
75
70
65
60
SH 10K
55
50
45 RGT 20°C

40
35
30
25
20
15
10
5
0
-30 -25 -20 -15 -10 -5 0 5 10 15 20 25

SH10K RGT20°C

Discharge temperature R Even when the motor windings are discharge line as indicated below at no more
protection protected against overheating by the internal than 150 mm from the discharge connection.
motor protection, the compressor discharge
gas temperature could exceed the maximum
Thermostat
allowed value of 135°C when the compressor
is operated outside its application envelope.
The most effective protection against too
high discharge gas temperature is to mount Discharge line

a discharge gas thermostat. An accessory kit

Bracket
is available from Danfoss which includes the
thermostat, mounting bracket and insulation. Insulation

The thermostat must be attached to the

16 AB196386425654en-011401
Application Guidelines Operating envelopes

Zeotropic refrigerant Refrigerant mixtures can be either zeotropic or In a zeotropic mixture (like R407C) on the other
mixtures azeotropic. hand the composition of vapour and liquid
changes during the phase transition. When the
An azeotropic mixture (like R502 or R507) effect of this phase transition is very small, the
behaves like a pure refrigerant. During a phase mixture is often called a near-azeotropic mixture.
transition (from vapour to liquid or from liquid R404A is such a near-azeotropic mixture.
to vapour) thecomposition of vapour and liquid
stays the same. The composition change causes phase shift and
temperature glide.

Phase shift In system components where both vapour and special attention. Zeotropic refrigerants must
liquid phase are present (evaporator, condenser, always be charged in liquid phase. Flooded
liquid receiver), the liquid phase and vapour evaporators should not be applied in systems
phase do not have the same composition. In with zeotropic refrigerants. This also applies to
fact both phases form two different refrigerants. near-azeotropic mixtures.
Therefore zeotropic refrigerants need some

Temperature glide During the evaporating process and the Points C and D are mean point values. These
condensing process at constant pressure, are temperatures which correspond more or
the refrigerant temperature will decrease less with the average temperature during the
in the condenser and rise in the evaporator. evaporating and condensing process. For the
Therefore when speaking about evaporating refrigerants with glide of around 6K, mean point
and condensing temperatures, it is important to temperatures are typically about 2°C to 3°C lower
indicate whether this is a dew point temperature than dew point temperatures. According to
or a mean point value. In the figure below, the Asercom recommendations, Danfoss Commercial
dotted lines are lines of constant temperature. Compressors uses dew point temperatures for
selection tables and application envelopes etc.
They do not correspond to the lines of constant
pressure. To obtain exact capacity data at mean point
temperatures, the mean point temperatures
Points A and B are dew point values. These are must be converted to dew point temperatures
temperatures on the saturated vapour line. with help of refrigerant data tables from the
refrigerant manufacturer.

Dew temperature and

Mean temperature for
R407A/C/F

AB196386425654en-011401 17
 Application Guidelines Outline drawings

1 cylinder

Ø 224
Bump on
single phase

Suction rotolock
1” (1)
1”1/4 (2)
LP gauge
port 1/4”
(schrader)
333 (1)
356 (2)

263
Discharge rotolock
3/8” oil equalisation 1”

98

68 68

25
82
Mounting hole for PTC crankcase heater

109 118 All dimensions in mm

35° 33°
Code
Threaded oil Model
Suction: 142 (1) / 147 (2) 1 3 4 5 6 7 9
Discharge: 142 (1) (2) sight glass MT/MTZ018 (1) (1) (1) (1) - - -
MT/MTZ022 (2) (1) (1) (1) (1) - (1)
39 MT/MTZ028 (2) (1) (1) (1) (1) - (1)
MT/MTZ032 (2) (2) (2) (2) (2) (2) (2)
68 MT/MTZ036 (2) (2) (2) (2) (2) (2) (2)
MT/MTZ040 (2) (2) (2) - (2) - -

141
123

17
159
17°

Terminal box

Silent bloc

Bolt HM8-40 Spade connectors

1/4" AMP-AWE

Ø 21 mm
Earth M4-12
23
15

Knock-out Ø 21 mm
Ø 31.75

IP rating: 55 (with cable gland)

Rotolock connections size Pipe sizing Rotolock valve

Suction Discharge Suction Discharge Suction Discharge
MT/MTZ 018 - 022 (3/4/5/6/9) -
1" 1" 1/2" 3/8" V06 V01
028 (3/4/5/6)
MT/MTZ022/1-028/1-032 - 036
1"1/4 1" 5/8" 1/2" V09 V06
- 040

18 AB196386425654en-011401
Application Guidelines Outline drawings

2 cylinders

Ø 288

Suction rotolock
1"3/4

Schrader 1/4"

413

Discharge rotolock
1"1/4

252
Oil equalisation 265
3/8"

Mounting hole for

98(1)
PTC crankcase heater
117(2)

74

32(1) Threaded oil sight glass 68 82(1) / 98 (2)

20(2)
60 156
Suction 179 All dimensions in mm
Discharge 176 8°
Code
Model
1 3 4 6 7 9
MT/MTZ044 (1) (1) (1) (2) (1) (1)
MT/MTZ050 (2) (1) (1) (2) (1) (1)
145 171 MT/MTZ056 (2) (1) (1) (2) (1) (1)
MT/MTZ064 (2) (1) (1) (2) - (1)
21 MT/MTZ072 - (1) (1) (2) - (1)
38°
MT/MTZ080 - (2) (1) (2) - (1)

125

8°

96
188 (1) / 196 (2)

Terminal box for model (1) Terminal box for model (2)

Silent bloc
Screw
Spade connectors 10-32 UNF x 9.5
Bolt HM8-40
1/4" AMP-AWE

Ø 21 mm Knock-out
Earth M4-12 Ø 25.5 mm
23 Earth M4-12
15
Knock-out Ø 21 mm
Knock-out Ø 29 mm
Ø 31.75
IP rating: 55 (with cable gland) IP rating: 54 (with cable gland)

Rotolock connections size Pipe sizing Rotolock valve

Suction Discharge Suction Discharge Suction Discharge

MT/MTZ 044 - 050 - 056 - 064 - 072 1"3/4 1"1/4 7/8" 3/4" V07 V04

MT/MTZ 080 1"3/4 1"1/4 1"1/8 3/4" V02 V04

AB196386425654en-011401 19
 Application Guidelines Outline drawings

4 cylinders

Ø 352 210

538 (2) Schrader 1/4 "

518 (1)

Suction rotolock
1"3/4
Discharge rotolock
1"1/4

117
Oil equalisation Threaded oil
3/8" sight glass
209
233

155
125
99 95

98
232

Mounting hole for

PTC crankcase heater
Code
Model
3 4 6 7 9
MT/MTZ100 (1) (1) (1) (1) (1)
MT/MTZ125 (1) (1) (1) (1) (1)
MT/MTZ144 (2) (2) (2) (2) (2)
15° MT/MTZ160 (2) (2) (2) (2) (2)

246
15°
205
155°

All dimensions in mm

15°
246

Terminal box

Silent bloc
Screw
10-32 UNF x 9.5

Knock-out
Ø 25.5 mm
Earth M4-12

Knock-out Ø 29 mm

IP rating: 54 (with cable gland)

Rotolock connections size Pipe sizing Rotolock valve

Suction Discharge Suction Discharge Suction Discharge
MT/MTZ100 - 125 - 144 - 160 1"3/4 1"1/4 1"1/8 3/4" V02 V04

20 AB196386425654en-011401
Application Guidelines Electrical connections and wiring

Single phase electrical

LRA - Locked Rotor MCC - Maximum Winding resistance (Ω)
characteristics Current (A) Continuous Current (A) ( ± 7 % at 25° C)
Motor Code 1 5 1 5 1 5
Winding run start run start
MT/MTZ018 51 40 13 10 1.35 4.25 1.35 3.83
MT/MTZ022 49.3 41 17 15 1.20 2.31 1.35 3.83
MT/MTZ028 81 51 25 20 0.68 1.84 1.07 3.26
MT/MTZ032 84 70 26.5 20 0.63 2.90 0.80 4.23
MT/MTZ036 84 60 30 22 0.63 2.90 0.80 4.23
MT/MTZ040 99 - 34 - 0.54 1.87 - -
MT/MTZ044 97 - 31 - 0.46 1.94 - -
MT/MTZ050 114 - 36 - 0.38 1.83 - -
MT/MTZ056 136 - 42.5 - 0.33 1.64 - -
MT/MTZ064 143 - 46 - 0.33 2.14 - -

Nominal capacitor values PSC/CSR* CSR only

and relays Models Run capacitors (1) Start capacitors (2)
Start relay
(A) µF (C) µF (B) µF
MT/MTZ018 JA-5 20 10 100
MT/MTZ022 JC-5 20 10 100
3ARR3J4A4
50 Hz MT/MTZ028 JE-5 20 10 100 /RVA6AMKL
MT/MTZ032 JF-5 25 10 135
MT/MTZ036 JG-5 25 10 135
MT/MTZ018 JA-1 15 10 100
MT/MTZ022 JC-1 30 15 100
MT/MTZ028 JE-1 25 25 135
MT/MTZ032 JF-1 25 20 100
MT/MTZ036 JG-1 25 20 100 3ARR3J4A4
60 Hz
MT/MTZ040 JH-1 35 20 100 /RVA6AMKL
MT/MTZ044 HJ-1 30 15 135
MT/MTZ050 HK-1 30 15 135
* PSC: Permanent Split Capacitor MT/MTZ056 HL-1 35 20 200
CSR: Capacitor Start Run
(1) Run capacitors: 440 volts MT/MTZ064 HM-1 30 25 235
(2) Start capacitors: 330 Volts

Trickle circuit The trickle circuit provides the facility of heating By using PSC or CSR starting systems,
the compressor crankcase by feeding a small compressor models MT / MTZ 018 - 022 can
current to the auxiliary winding and the run be operated without crankcase heaters as the
capacitor (See the drawings in section “Electrical heater function is provided by the trickle circuit.
connections and wiring”).
R For the larger single phase compressor
models MT / MTZ 028 - 064, the use of the PTC
crankcase heater is recommended.

PSC wiring PSC wiring may be used for refrigerant circuits ensured before start-up because of the low
with capillary tubes or expansion valves with starting torque characteristics of this system.
bleed ports. Pressure equalisation must be

CSR wiring CSR wiring provides additional motor torque Some applications with high differential pressure
at start-up, by the use of a start capacitor in can require a very high starting torque. For such
combination with the run capacitor. This system cases the CSR starting kit can be converted to
can be used for refrigerant circuits with capillary a very high starting torque kit by an additional
tubes or expansion valves. The start capacitor is start capcitor of 100 μF parallel to the start
only connected during the starting operation, a capacitor of the CSR kit. This configuration
potential relay is used to disconnect it after the can also be used to reduce erratic starting
start sequence. at unfavourable conditions such as very low
ambient temperature or weak voltage.

AB196386425654en-011401 21
 Application Guidelines Electrical connections and wiring

Suggested wiring dia-

grams

Single phase - PSC wiring

with trickle circuit 230 V

220 kΩ - 1 W C
IOL

A µF S R

C µF
Thermostat
IOL Motor protector
A & C Run capacitors
C Common
S Start winding (auxiliary)
R Run winding (main)

Single phase - CSR wiring

with trickle circuit 230 V
Start relay

5
220 kΩ - 1 W C
IOL

A µF S R
1
C µF

IOL Motor protector

Thermostat
B µF

A & C Run capacitors

B Start capacitor
C Common 15 kΩ - 1 W
S Start winding (auxiliary)
R Run winding (main)

Single phase - CSR wiring

without trickle circuit 230 V
Start Relay

C
5
Thermostat
IOL

CµF
Run capacitor 2
IOL Motor protector
A+C Run capacitors
AµF
Run capacitor S R
B Start capacitor 1
C Common
S Start winding (auxiliary)
R Run winding (main) BµF
Capacitors A and C can be replaced by
Start capacitor 15 kΩ -1 w
a single capacitor of size A + C
B capacitor delivered in two parts for
MT(Z)56 & 64-1

22 AB196386425654en-011401
Application Guidelines Electrical connections and wiring

Three phase electrical

characteristics

LRA - Locked Rotor MCC - Maximum Winding resistance (Ω)

Current (A) Continuous Current (A) ( ± 7 % at 25° C)
Motor Code 3 4 6 7 9 3 4 6 7 9 3 4 6 7 9
MT/MTZ018 38 20 - - - 9.5 5 - - - 2.58 9.34 3.41 - -
MT/MTZ022 38 20 30 - 22.5 11 6 8.5 - 6.5 2.58 11.84 3.41 - 7.30
MT/MTZ028 57 23 41 - 32 16 7.5 11.5 - 8.5 1.41 6.30 1.20 - 4.72
MT/MTZ032 60 25 44 22 35 18 8 13 5.5 9 1.32 4.45 2.01 10.11 3.40
MT/MTZ036 74 38 74 26 35 17 9 17 7 9.5 1.10 5.92 1.10 9.39 -
MT/MTZ040 98 38 74 - - 22 10 18 - - 0.89 4.05 1.10 - -
MT/MTZ044 115 48.5 77 44 78 22 9.5 16 8.5 13 0.76 3.29 1.15 5.95 1.72
MT/MTZ050 115 48.5 77 44 78 25 11.5 19 10 13.5 0.74 3.42 1.42 5.95 1.72
MT/MTZ056 130 64 105 50 72 24 12 23 11 15 0.56 2.44 0.78 3.94 1.67
MT/MTZ064 137 64 124 - 72 29 14 25 - 17.5 0.58 2.44 0.78 - 1.67
MT/MTZ072 135 80 143 - 100 30 17 27 - 18.5 0.56 1.94 0.57 - 1.35
MT/MTZ080 140 80 132 - 102 36 19 29 - 22.5 0.49 1.94 0.57 - 1.33
MT/MTZ100 157 90 126 62 110 43 22 35 17 26 0.51 2.12 0.68 3.17 1.29
MT/MTZ 125 210 105 170 75 150 54 27 43 22 30 0.39 1.45 0.44 2.56 0.86
MT/MTZ 144 259 130 208 90 165 64 36 51 25 40 0.28 1.15 0.38 2.04 0.74
MT/MTZ 160 259 130 208 99 165 70 36 51 29 46 0.28 1.15 0.38 1.80 1.12

Winding resistance Winding resistance is the resistance between Winding resistance is generally low and it
indicated terminal pins at 20°C (resistance value requires adapted tools for precise measurement.
+/- 7%).

Motor protection and The 3-phase compressors are protected by Note: once the overload protector has tripped it
suggested wiring dia- an internal motor protector, connected to may take up to 3 hours to reset and restart the
grams the neutral point of the star connected stator compressor.
windings, the protector cuts out all 3-phases For all 3-phase compressors, a PTC crankcase
simultaneously. heater is required.

Suggested wiring diagram CONTROL CIRCUIT

L1 L3 L2
with “one shot” pump-down
cycle and safety lock-out Q1

relay F1 F1

KM
KA KS

KM KA KA

A1
T1 T2
Control device ................................................. TH KS
A3
180 s
Optional short cycle timer (3 min) ...... 180 s HP
A2 T3
Control relay ..................................................... KA
Liquid Solenoid valve ............................... LLSV
TH
Compressor contactor ................................. KM LP

Safety lock out relay ....................................... KS

Pump-down control & LP switch................ LP KS M
H.P. switch ......................................................... HP DGT

Fused disconnect ........................................... Q1

Fuses .................................................................... F1 KM KA LLSV KS

Compressor motor ........................................... M

Discharge gas thermostat ........................ DGT

AB196386425654en-011401 23
 Application Guidelines Electrical connections and wiring

Wiring diagram without

CONTROL CIRCUIT
pump-down cycle L1 L3 L2

Q1

F1 F1

KM
KA KS
KA KA

A1
T1 T2
A3
HP
180 s
A2 T3

Control device ................................................. TH LP

Optional short cycle timer (3 min) ...... 180 s
Control relay ..................................................... KA KS
Compressor contactor ................................. KM TH
Safety lock out relay ....................................... KS M
High pressure switch ..................................... HP DGT
Low pressure switch........................................ LP
Fused disconnect ........................................... Q1 KS
KM KA
Fuses .................................................................... F1
Compressor motor ........................................... M
Discharge gas thermostat ........................ DGT
85 52 019 - A

Soft starters Starting current of Maneurop® 3-phase For details of the CI-tronicTM MCI soft starters,
compressors can be reduced by using a soft please refer to literature DKACT.PD.C50.
starter. Version available: CI-tronicTM soft starters
type MCI (recommended). The starting current The number of starts should be limited to 6 per
can be reduced by up to 50% depending on the hour. HP/LP pressure equalisation is required
compressor model and the type of soft starter. before starting.
Also mechanical stresses that occur at starting
are reduced which increases the life of the Soft starters cannot be used with Refrigerant
internal components. Group 1 e.g. R454C.

Voltage application range

Motor Code Nominal voltage Voltage application range
1 208-230 V / 1 ph / 60 Hz 187 - 253 V
3 200-230 V / 3 ph / 60 Hz 180 - 253 V
380-400 V / 3 ph / 50 Hz 340 - 440 V
4
460 V / 3 ph / 60 Hz 414 - 506 V
5 220-240 V / 1 ph / 50 Hz 198 - 264 V
6 230 V / 3 ph / 50 Hz 207 - 253 V
500 V / 3 ph / 50 Hz 450 - 550 V
7
575 V / 3 ph / 60 Hz 517 - 632 V
9 380 V / 3 ph / 60 Hz* 342 - 418 V
* Some models are approved for 380 - 400 V / 3 ph / 60 Hz. Please check datasheet.

IP rating The compressor terminal boxes IP rating The IP ratings are only valid when correctly sized
according to CEI 529 are shown on the outline cable glands of the same IP rating are applied.
drawings section.

IP 5 5
1st numeral, level of protection against contact and foreign objects
5 complete protection against contact and against harmful dust deposits

2nd numeral, level of protection against water

4 protection against water splashing from any direction
5 protection against jets of water from any direction
MT/ MTZ 1cyl = IP55 -- MT/ MTZ 2 cyl check section outline drawings -- MT/MTZ 4cyl = IP54

24 AB196386425654en-011401
Application Guidelines Refrigerants and lubricants

General information When choosing a refrigerant, different aspects Additional points could influence the final
must be taken into consideration: choice:
• Legislation (now and in the future) • Environmental considerations
• Safety • Standardisation of refrigerants and lubricants
• Application envelope in relation to expected • Refrigerant cost
running conditions • Refrigerant availability
• Compressor capacity and efficiency
• Compressor manufacturer recommendations The table below gives an overview of the
& guidelines different refrigerant - lubricant - compressor
Only Danfoss lubricant are allowed for combinations for Maneurop® MT & MTZ
Maneurop® MT & MTZ compressors. compressors.

Lubricant Compressor
Refrigerant Type Danfoss lubricant Application
type type

R22 HCFC Mineral MT Mineral oil, 160P Medium / High temperature

R417A HFC Polyolester MT Polyolester oil 175PZ Medium / High temperature

R407A/C/F HFC Polyolester MTZ Polyolester oil 175PZ Medium / High temperature

R134a HFC Polyolester MTZ Polyolester oil 175PZ Medium / High temperature

R404A HFC Polyolester MTZ Polyolester oil 175PZ Medium temperature

R507 HFC Polyolester MTZ Polyolester oil 175PZ Medium temperature

R448A/ HFO Polyolester MTZ Polyolester oil 175PZ Medium/High temperature
R449A
R454C HFO Polyolester MTZ Polyolester oil 175PZ Medium/High temperature

R452A HFC+HFO Polyolester MTZ Polyolester oil 175PZ Medium/High temperature

Alternative R22 retrofit Polyolester MT/MTZ Polyolester oil 175PZ Medium / High temperature
with HFC refrigerants

Danfoss does not authorise the use of hydrocarbons in Maneurop® MT/MTZ

Hydrocarbons compressors

Capacity and other data for HFC blends as replacements in existing installations, see
refrigerants are not published in this document. technical news FRCC.EN.049. and FRCC.EN.085.
Maneurop® compressors however are suitable for for more information on retrofit.
use with these refrigerants and can still be used

R22 R22 is an HCFC refrigerant and is still in use today. The Maneurop® MT compressor is supplied with
It has a low ODP (Ozone Depletion Potential) an initial mineral oil charge.
and therefore it will be phased out in the future.
Check local legislation. Always use mineral oil
160P with R22.

Alternatives R22, HFC A wide variety of HFC blends exist. There were - R427A, ... Retrofit technical news have been
retrofit developed as temporary HCFC and HFC high issued to advice about use of these refrigerants.
GWP alternatives. Some examples are R422A/D

R407C Refrigerant R407C is an HFC refrigerant with information about zeotropic refrigerants; refer to
similar thermodynamic properties to those of section "zeotropic refrigerant mixtures". R407C
R22. must be charged in the liquid phase.

R407C has zero ozone depletion potential Always use the Maneurop® MTZ compressors
(ODP=0). Many installers and OEMs consider with Danfoss 160PZ or 175PZ polyolester oil,
R407C to be the standard alternative for which is supplied with the MTZ compressor for
R22. R407C is a zeotropic mixture and has a R407C applications.
temperature glide of about 6 K. For more specific

AB196386425654en-011401 25
 Application Guidelines Refrigerants and lubricants

R134a Refrigerant R134a is an HFC refrigerant with high condensing temperatures, R134a is the
thermodynamic properties comparable to ideal choice. R134a is a pure refrigerant and has
those of the CFC refrigerant R12. R134a has zero temperature glide. For R134a applications
zero ozone depletion potential (ODP = 0) and is always use the Maneurop® MTZ compressor with
commonly accepted as the best R12 alternative. Danfoss 175PZ polyolester oil which is supplied
For applications with high evaporating and with the MTZ compressor.

R404A Refrigerant R404A is an HFC refrigerant with other aspects this small glide can be neglected.
thermodynamic properties comparable to Because of the small glide, R404A is often called
those of the CFC refrigerant R502. R404A has a near-azeotropic mixture. For more information
zero ozone depletion potential (ODP = 0) and refer to section «zeotropic refrigerant mixtures».
is commonly accepted as one of the best R502 For low evaporating temperature applications
alternatives. R404A is especially suitable for down to -45°C, Maneurop® NTZ compressors
low evaporating temperature applications but should be used. Refer to the NTZ selection and
it can also be applied to medium evaporating application guidelines. For medium temperature
temperature applications. R404A is a mixture and R404A applications, always use the Maneurop®
has a very small temperature glide, and therefore MTZ compressor with 175PZ polyolester oil
must be charged in its liquid phase, but for most which is supplied with the MTZ compressor.

R507 Refrigerant R507 is an HFC refrigerant with mixture with no temperature glide. For low
thermodynamic properties comparable to evaporating temperature applications down to
those of the CFC refrigerant R502 and virtually -45°C, Maneurop® NTZ compressor should be
equal to those of R404A. R507 has no ozone used. Refer to the NTZ selection and application
depletion potential (ODP = 0) and is commonly guidelines. For medium temperature R507
accepted as one of the best R502 alternatives. applications, always use the Maneurop® MTZ
As with R404A, R507 is particularly suitable for compressor and Maneurop® 175PZ polyolester oil
low evaporating temperature applications but which is supplied with the MTZ compressor.
it can also be used for medium evaporating
temperature applications. R507 is an azeotropic

R407A Refrigerant R407A is an HFC with similar in liquid phase, R407A GWP is stated at 2107
thermodynamic properties to those of R404A, [CO2=1,0]. Always use the Maneurop MTZ
R407A is a zeotropic refrigerant and has a compressors with danfoss 175PZ polyolester oil,
temperature glide of about 6,6K. For more which is supplied with the MTZ compressors for
specific information about zeotropic refrigerant, R407A applications.
refer to section “zeotropic refrigerants mixtures”
and read FRCC.EN.085. R407A must be charged

R407F Refrigerant R407F is an HFC with similar in liquid phase, R407F GWP is stated at 1825
thermodynamic properties to those of R404A, [CO2=1,0]. R407F is mainly suitable for high &
R407F is a zeotropic refrigerant and has a medium temperature application- Always use
temperature glide of about 6,4K. For more the Maneurop MTZ compressors with danfoss
specific information about zeotropic refrigerant, 175PZ polyolester oil, which is supplied with the
refer to section “zeotropic refrigerants mixtures” MTZ compressors for R407F applications..
and read FRCC.EN.085. R407F must be charged

R448A/R449A R448A/R449A is an HFO/HFC Blend, with R448A/R449A must be charged in liquid phase,
similar thermodynamic properties to those R448A GWP is stated at 1387/1397 [CO2=1,0].
of R404A or R22. R448A/R449A is a Zeotropic Always use the Maneurop MTZ compressors with
refrigerant and has a temperature glide of about Danfoss 175PZ polyolester oil, which is supplied
6,1/6,3K. For more specific information about with the MTZ compressors for R448A/R449A
zeotropic refrigerant, refer to section “zeotropic applications.
refrigerants mixtures” and read FRCC.EN.085.

26 AB196386425654en-011401
Application Guidelines Refrigerants and lubricants

R452A R452A is an HFO/HFC Blend, with similar in liquid phase, R452A GWP is stated at 1945
thermodynamic properties to those of R404A [CO2=1,0]. Always use the Maneurop® MTZ
or R22. R452A is a Zeotropic refrigerant and compressors with Danfoss 175PZ polyolester oil,
has a temperature glide of about 4K. For more which is supplied with the MTZ compressors for
specific information about zeotropic refrigerant, R452A applications.
refer to section “zeotropic refrigerants mixtures”
and read FRCC.EN.085. R452A must be charged

R454C R454C is an HFO Blend, with similar and directives about the use of refrigerant of
thermodynamic properties to R404A. R454C is the A2L safety group (EN378, EN60335). Outside
a Zeotropic refrigerant and has a temperature Europe refer to the local regulation.
glide of about 6K and therefore must be
charged in liquid phase. R With R454C, liquid migration to the
compressor have to be avoid:
For R454C GWP is stated below 150 limit. - Maintain adequate superheat setting of
Always use the Maneurop MTZ compressors minimum 8-10K
with Danfoss 175PZ polyolester oil, which is - Use solenoid valve on the liquid line and pump
supplied with the MTZ compressors for R454C down is recommended.
applications. - Use a crankase heater to avoid dissolution of
the lubricant.
R454C is classified A2L with low flammability
properties. Please refer to European regulation

R513A R513A is an HFO/HFC Blend, with similar R With R513A, liquid migration to the
thermodynamic properties to the R134a. R513A is compressor have to be avoid:
a Azeotrope refrigerant with a negligible glide. - Maintain adequate superheat setting of
minimum 8-10K
R513A has zero ozone depletion potential - Use solenoid valve on the liquid line and pump
(ODP=0) and a Global Warming Potential (AR5) down is recommended.
at 573 [CO2=1] . Always use the Maneurop® MTZ - Use a crankase heater to avoid dissolution of
compressors with Danfoss 175PZ polyolester oil, the lubricant.
which is supplied with the MTZ compressors for
R513A applications.

Hydrocarbons Hydrocarbons such as propane, isobutane Maneurop® MT or MTZ compressors in any way,
etc. are extremely flammable. Danfoss does even with a reduced refrigerant charge.
not authorise the use of hydrocarbons with

AB196386425654en-011401 27
 Application Guidelines System design recommendations

Piping design Oil in a refrigeration circuit is required to system, the amount of oil returning to the
lubricate moving parts in the compressor. During compressor is lower than the amount of oil
normal system operation small oil quantities leaving the compressor, the compressor will
will continuously leave the compressor, with the become starved of oil and the condenser,
discharge gas. With good system piping design evaporator and/or refrigerant lines will become
this oil will return to the compressor. As long filled with oil. In such situations, additional oil
as the amount of oil circulating through the charge will only correct the compressor oil level
system is small it will contribute to good system for a limited period of time and increase the
operation and improved heat transfer efficiency. amount of surplus oil in the rest of the system.
However, too large amounts of oil in the system
will have a negative effect on condenser and Only correct piping design can ensure a good oil
evaporator efficiency. If, in a poorly designed balance in the system.

Suction lines Horizontal suction line sections shall have a Gas velocities higher than 12 m/s will not
slope of 0.5% in the direction of refrigerant flow contribute to significantly better oil return.
(5 mm per meter). The cross-section of horizontal However they will cause higher noise levels
suction lines shall be such that the resulting and result in higher suction line pressure drops
gas velocity is at least 4 m/s. In vertical risers, a which will have a negative effect on the system
gas velocity of 8 to 12 m/s is required to ensure capacity.
proper oil return. A U-trap is required at the
foot of each vertical riser. If the riser is higher
than 4 m, additional U-traps are required for
each additional 4 meters. The length of each
U-trap must be as short as possible to avoid the
accumulation of excessive quantities of oil (see
figure below).

For compressors mounted in parallel, the

common suction riser should be designed as
a double riser. Also refer to the News bulletin
"Mounting instructions for installation of
Maneurop® compressors in parallel " and "Parallel
application guidelines".

Note that the suction rotolock valves, which The pipe sizes selected for specific systems may
can be ordered from Danfoss as accessories, are differ from these recommended sizes.
designed for average pipe sizes, selected for
systems running at nominal conditions. It is recommended that the suction lines are
insulated to limit suction gas superheat.

Discharge line When the condenser is mounted above the

compressor, a loop above the condenser and a
U-trap close to the compressor are required to
prevent liquid draining from the condenser into
the discharge line during standstill.

28 AB196386425654en-011401
Application Guidelines System design recommendations

Oil charge and oil separator In most installations the initial compressor oil installations with the risk of slow oil return such
charge will be sufficient. In installations with line as in multiple evaporator or multiple condenser
runs exceeding 20 m, or with many oil traps or an installations, an oil separator is recommended.
oil separator, additional oil may be required. In

Filter driers For new installations with MTZ compressors filter driers containing activated alumina are
Danfoss recommends using the Danfoss DML recommended.
100%-molecular sieve, solid core filter drier.
Molecular sieve filter driers with loose beads The drier is to be oversized rather than
from third party suppliers shall be avoided. undersized. When selecting a drier, always
take into account its capacity (water content
For servicing of existing installations where acid capacity), the system refrigerating capacity and
formation is present the Danfoss DCL solid core the system refrigerant charge.

Operating limits

High pressure A high pressure safety switch is required to stop R The HP switch must either be in a lockout
the compressor, should the discharge pressure circuit, or be a manual reset device to prevent
exceed the values shown in the table below. The compressor cycling around the high pressure
high pressure switch can be set to lower values limit. When a discharge valve is used, the HP
depending on the application and ambient switch must be connected to the service valve
conditions. gauge port, which cannot be isolated.

Low pressure R A low pressure safety switch is recommended to avoid compressor operation at too lower
suction pressures.

MT MTZ
R22 R417A R407A R407C R407F R134a R404A / R507 R452A R449A R448A R454C R513A
160P 175PZ 175PZ 175PZ 175PZ 175PZ 175PZ
bar (g)

Test pressure low side 25 25 25 25 25 25 25 25 25 25 25 25

Working pressure range 10.9 - 27.7 9.32 - 25.5 11.6 - 25.8 12.5 - 29.4 12.1 - 24 7.87 - 22.6 13.2 - 27.7 12.5-27.3 11.7-25.9 11.7-26.0 5.2 - 22.3 8.37-23.36
high side
Working pressure range 1.01 - 6.89 0.54 - 5.66 0.53 - 5.94 1.43 - 6.55 0.99 - 6.25 0.06 - 4.72 1.04 - 7.2 0.84-6.69 0.6-6.07 0.6-6.08 0.4 - 5.2 0.21-5.12
low side
*Relief valve opening 30 30 30 30 30 30 30 30 30 30 30 30
pressure difference
*Relief valve closing 8 8 8 8 8 8 8 8 8 8 8 8
pressure difference
* Relief valve fitted on 2 and 4 cyl.

Low ambient temperature At low ambient temperatures, the condensing valve in the discharge line is required and
operation temperature and condensing pressure in air special care should be taken when designing the
cooled condensers will decrease. discharge line.)
• Reduce air flow to condensers.
This low pressure may be insufficient to supply
enough liquid refrigerant to the evaporator. As a Other problems can also occur when the
result the evaporator temperature will strongly compressor is operating at low ambient
decrease with the risk of frosting. At compressor temperature. During shut down periods, liquid
start-up, the compressor can pull a deep vacuum refrigerant can migrate to a cold compressor.
and it can be switched off by the low pressure
protection. Depending on the low pressure For such conditions a belt-type crankcase heater
switch setting and delay timer short cycling can is strongly recommended.
occur. To avoid these problems, several solutions
are possible, based on reducing condenser Note that with 100% suction gas cooled motors,
capacity: Maneurop® compressors can be externally
• Indoor location of condensers insulated.
• Liquid flooding of condensers (note: this
solution requires extra refrigerant charge, which Refer to section "Liquid refrigerant control &
can introduce other problems. A non-return charge limits" for more details.

AB196386425654en-011401 29
 Application Guidelines System design recommendations

Operating voltage and

cycle rate
Operating voltage range The operating voltage limits are shown in unbalance for 3-phase compressors is 2%.
the table from section “Compressor model Voltage unbalance causes high current draw
designation”. The voltage applied to the on one or more phases, which in turn leads to
motor terminals must always be within these overheating and possible motor damage.
table limits. The maximum allowable voltage Voltage unbalance is given by the formula:
|Vavg - V1-2 |+|Vavg - V1-3 |+|Vavg - V2-3 |
% voltage unbalance: x 100
2 xVavg
Vavg = Mean voltage of phases 1, 2 and 3 V1-3 = Voltage between phases 1 and 3
V1-2 = Voltage between phases 1 and 2 V2-3 = Voltage between phases 2 and 3.

Cycle rate limit R There may be no more than 12 starts per The system must be designed in such a way
hour (6 when a soft start accessory is used). A to guarantee a minimum compressor running
higher number reduces the service life of the time in order to provide proper oil return and
motor-compressor unit. If necessary, use an anti- sufficient motor cooling after starting.
short-cycle timer in the control circuit. Note that the oil return rate varies as a function
A time-out of six minutes is recommended. of the system design.

Liquid refrigerant control Refrigeration compressors are basically designed oil from the sump. Good system design can
and charge limit as gas compressors. Depending on the limit the amount of liquid refrigerant in the
compressor design and operating conditions, compressor, which will have a positive effect on
most compressors can also handle a limited the compressor service life.
amount of liquid refrigerant. Maneurop® MT
and MTZ compressors have a large internal Liquid refrigerant can enter a compressor in
volume and can therefore handle relatively large different ways, with different effects on the
amounts of liquid refrigerant without major compressor.
problems. However even when a compressor
can handle liquid refrigerant, this will not be R With R513A and R454C, liquid migration to
favourable to its service life. Liquid refrigerant the compressor must be avoided by maintaining
can dilute the oil, wash oil out of bearings and adequate superheat setting of min. 8-10K.
result in high oil carry over, resulting in loss of

Off-cycle migration During system standstill and after pressure At lower pressures the oil holds less refrigerant,
equalisation, refrigerant will condense in the and as a result part of the refrigerant will
coldest part of the system. The compressor can violently evaporate from the oil, causing the oil
easily be the coldest spot, for example when it to foam. This process is often called “boiling”.
is placed outside in low ambient temperatures.
After a while, the full system refrigerant charge The negative effects from migration on the
can condense in the compressor crankcase. A compressor are:
large amount will dissolve in the compressor • oil dilution by liquid refrigerant
oil until the oil is completely saturated with • oil foam, transported by refrigerant gas and
refrigerant. If other system components are discharged into the system, causing loss of oil
located at a higher level, this process can be and in extreme situations risk for oil slugging
even faster because gravity will assist the liquid • in extreme situations with high system
refrigerant to flow back to the compressor. When refrigerant charge, liquid slugging could occur
the compressor is started, the pressure in the (liquid entering the compressor cylinders).
crankcase decreases rapidly.

Liquid floodback during During normal and stable system operation, refrigerant due to different reasons:
operation refrigerant will leave the evaporator in a • wrong dimensioning, wrong setting or
superheated condition and enter the compressor malfunction of expansion device
as a superheated vapour. • evaporator fan failure or blocked air filters.

Normal superheat values at compressor suction In these situations, liquid refrigerant will
are 5 to 30 K. However the refrigerant leaving continuously enter the compressor.
the evaporator can contain an amount of liquid

30 AB196386425654en-011401
Application Guidelines System design recommendations

The negative effects from continuous liquid • in extreme situations with high system
floodback are: refrigerant charge and large amounts of
• permanent oil dilution floodback, liquid slugging could occur.

Liquid floodback at change In heat pumps, change over from cooling to The negative effects are:
over cycles in reversible heat heating cycles, defrost and low load short cycles • oil dilution
pumps may lead to liquid refrigerant floodback or • in extreme situations with high system
saturated refrigerant return conditions. refrigerant charge and large amounts of
floodback, liquid slugging could appear.

Liquid floodback and zeo- Liquid floodback in systems working with a This new refrigerant composition may result in
tropic refrigerants zeotropic refrigerant such as R407C introduces different compressor operating pressures and
additional negative effects. e.g. R407C, R454C. temperatures.
A part of the refrigerant leaves the evaporator
in liquid phase and this liquid has a different
composition than the vapour.

Crankcase heater R A crankcase heater protects against the Belt crankcase heaters are not self-regulating.
off-cycle migration of refrigerant and proves Control must be applied to energise the belt
effective if oil temperature is maintained 10 heater once the compressor has been stopped
K above the saturated LP temperature of the and then to de-energise it while the compressor
refrigerant. Tests must thereby be conducted is running. The belt heater must be energised 12
to ensure that the appro-priate oil temperature hours before restarting the compressor following
is maintained under all ambient conditions. A an extended down period.
PTC crankcase heater is recommended on all
stand-alone compressors and split systems. PTC If the crankcase heater is not able to maintain the
crankcase heaters are self-regulating. oil temperature at 10 K above the saturated LP
temperature of the refrigerant during off cycles
Under extreme conditions such as very low or if repetitive floodback is present a the Liquid
ambient temperature a belt type crankcase Line Solenoid Valve (LLSV) + pump-down cycle
heater could be used in addition to the PTC is required, eventually in conjunction with a
heater, although this is not a preferred solution suction accumulator.
for 1 and 2 cylinder compressors. The belt
crankcase heater must be positioned on the R Crankcase heater or PTC crankcase heater
compressor shell as close as possible to the oil always has to be use when refrigerant R454C or
sump to ensure good heat transfer to the oil. R513A is used.

Liquid line solenoid valve & In refrigeration applications, the Liquid Line A pump-down cycle design is required when
pump-down Solenoid Valve (LLSV) is highly recommended. evaporators are fitted with electric defrost
During the off-cycle, the LLSV isolates the liquid heaters.
charge in the condenser side, thus preventing
against refrigerant transfer or excessive Liquid line solenoid valve and pump down have
migration of refrigerant into the compressor. to be use with refrigierant R513A.
Furthermore, when using a LLSV in conjunction
with a pump-down cycle, the quantity of
refrigerant in the low-pressure side of the system
will be reduced.

Suction accumulator A suction accumulator offers considerable The suction accumulator must be selected in
protection against refrigerant floodback at accordance with the accumulator manufacturer
start-up, during operation or after the defrost recommendations. As a general rule, Danfoss
operation. This device also helps to protect recommends to size the accumulator for at least
against off-cycle migration by means of 50% of the total system charge. Tests however
providing additional internal free volume to the must be conducted to determine the optimal
low pressure side of the system. size.

AB196386425654en-011401 31
 Application Guidelines Sound and vibration management

Sound Running compressors cause sound and vibration. Because Maneurop® compressors are 100%
Both phenomena are closely related. suction gas cooled, and require no body cooling,
they can be insulated. Values for the sound
Sound produced by a compressor is transmitted reduction achieved with acoustic hoods are
in every direction by the ambient air, the shown also in the table on the right. For inside
mounting feet, the pipework and the refrigerant mounted compressors, sound insulation of the
in the pipework. plantroom is an alternative to sound insulation of
the compressor.
The easiest way to reduce the sound transmitted
through ambient air is to fit a Danfoss acoustic Sound transmitted by mounting feet, pipework
hood accessory. and refrigerant should be treated the same way
as for vibration. Please refer to the next section.

Te=-10°C / TC=45°C / SH=10

50Hz Acoustic hood 60Hz Acoustic hood
R404A R448A R449A R452A R454C R513A accessory** R404A R448A R449A R452A R454C R513A accessory**

MTZ018-4 73 74 73 76 75 71* MTZ018-4 76 75 73 76 72 71*

MTZ022-4 74 74 74 74 75 69* MTZ022-4 77 77 77 77 77 72*
MTZ028-4 75 72 73 73 75 68* MTZ028-4 74 73 74 73 76 68*
120Z0575 120Z0575
MTZ032-4 73 73 73 73 72 68* MTZ032-4 74 74 74 74 73 69*
MTZ036-4 72 72 72 72 73 67* MTZ036-4 73 73 73 73 76 68*
MTZ040-4 72 73 75 72 73 67 MTZ040-4 75 73 74 74 74 69
MTZ044-4 80 80 80 80 - 76* MTZ044-4 83 81 82 81 - 77*
MTZ050-4 83 83 83 83 - 79* MTZ050-4 86 86 86 86 - 82*
MTZ056-4 81 81 80 79 - 75* MTZ056-4 84 81 81 81 - 76*
120Z0576 120Z0576
MTZ064-4 80 80 80 80 - 76* MTZ064-4 83 83 83 83 - 78*
MTZ072-4 79 79 79 79 - 75* MTZ072-4 82 82 82 82 - 77*
MTZ080-4 80 80 79 80 - 76 MTZ080-4 82 81 80 82 - 77
MTZ100-4 85 84 84 82 - 79* MTZ100-4 88 86 86 85 - 81*
MTZ125-4 84 84 84 84 - 81* MTZ125-4 87 87 87 87 - 83*
120Z0577 120Z0577
MTZ144-4 83 83 83 83 - 80* MTZ144-4 86 86 86 86 - 82*
MTZ160-4 83 84 83 81 - 78 MTZ160-4 86 85 84 84 - 80

* Provisional Data
Sound power level for MTZ
As first approach, use these figures with -3 dB(A) reduction on the R404A sound power for MT models applied with R22.
** Acoustic hood accessory can reduce noise level by 6 to 10 dBA (depending on the operating conditions and models).

Vibration The mounting grommets delivered with the Care must be taken to avoid tubing having
compressor should always be used. They reduce resonant frequencies close to those of the
the vibration transmitted by the compressor compressor frequency.
mounting feet to the base frame.
Vibration is also transmitted by the refrigerant
The base on which the compressor is mounted gas. Maneurop® compressors have built in
should be sufficiently rigid and of adequate mass mufflers to reduce this vibration.
to ensure the full effectiveness of the mounting
grommets. To further reduce vibration an extra muffler can
be installed.
The compressor should never be directly
mounted to the base frame without the Note: Maneurop® MT & MTZ compressors have
grommets, otherwise high vibration transmission been designed and qualified for stationary
would occur and the compressor service life equipment used in A/C and Refrigeration
reduced. Suction and discharge lines must applications.
have adequate flexibility in 3 planes. Eventually
vibration absorbers may be required. Danfoss doesn’t warrant these compressors
for use in mobile applications, such as trucks,
railways, subways, etc...

32 AB196386425654en-011401
Application Guidelines Installation and service

System cleanliness System contamination is one of the main factors material. Clean all parts before brazing and
affecting equipment reliability and compressor always purge nitrogen or CO2 through the
service life. pipes during brazing to prevent oxidation. If
flux is used, take every precaution to prevent
Therefore it is important to ensure system leakage into the piping. Do not drill holes (e.g.
cleanliness when manufacturing a refrigeration for schräder valves) in parts of the installation
system. During the manufacturing process, that are already completed, when filings and
system contamination can be caused by: burrs can not be removed. Carefully follow the
• Brazing and welding oxides instructions below regarding brazing, mounting,
• Filings and particles from removing burrs from leak detection, pressure test and moisture
pipe-work removal. All installation and service work shall
• Brazing flux only be done by qualified personnel respecting
• Moisture and air. all procedures and using tools (charging systems,
tubes, vacuum pump, etc.) dedicated for the
Only use clean and dehydrated refrigeration refrigerant that will be used.
grade copper tubes and silver alloy brazing

Compressor handling,
mounting and connection
to the system
Compressor handling Maneurop® MT and MTZ compressors are lug should never be used to lift the complete
provided with a lifting lug. This lug should installation.
always be used to lift the compressor. Once the Keep the compressor in an upright position
compressor is installed, the compressor lifting during handling.

Compressor mounting Mount the compressor on a horizontal plane These grommets largely attenuate the
with a maximum slope of 3 degrees. All compressor vibration transmitted to the base
compressors are supplied with three or four frame. The compressor must always be mounted
rubber mounting grommets, each complete with with these grommets. Refer to the table below
metal sleeves and nuts and bolts. Refer to the for torque values.
section “Outline drawings”.

Designation Recommended torque (Nm)

Cable screw of T connector in electrical box screw 10/32 - UNF x 3 3
1" 80
Rotolock valves and solder sleeves 1"1/4 90
1"3/4 110
Mounting grommet bolts 1-2 / 4 cylinder 15 / 50
Oil sight glass - 50
Oil equalisation connection 1-2 / 4 cylinder 30 / 45

Compressor connection to New compressors have a protective nitrogen valves to the pipework before the compressor
the system holding charge. is mounted. When all brazing is finished and
when the total system is ready, the compressor
R The suction and discharge caps should caps can be removed and the compressor can
only be removed just before connecting the be connected to the system with a minimum
compressor to the installation to avoid air and exposure to ambient air.
moisture entering the compressor.
If this procedure is not possible, the sleeves
Whenever possible the compressor must be the or valves may be brazed to the pipes when
last component to be integrated in the system. It mounted on the compressor.
is advisable to braze the solder sleeves or service

AB196386425654en-011401 33
 Application Guidelines Installation and service

In this situation nitrogen or CO2 must be purged Note: When the compressor is built into a ”pack”
through the compressor via the schrader valve to or “rack” configuration which is not installed
prevent air and moisture ingress. Purging must immediately on its final location, a vacuum pull-
start when the caps are removed and proceeded down and moisture removal must be performed
during the brazing process. to this pack (rack) as if it were a complete system
When rotolock valves are used on the (see below). The pack must be charged with
compressor, they shall be closed immediately nitrogen or CO2 and open tubes must be blocked
after mounting, thus keeping the compressor with caps or plugs.
isolated from atmosphere or from a not yet
dehydrated system.

System pressure test It is recommended that an inert gas such as 1-2-4 cylinder
nitrogen be used for pressure testing. Dry air compressors
may also be used but care should be taken Maximum compressor test 25 bar(g)
pressure, low side
since it can form an inflammable mixture with
Maximum compressor test
the compressor oil. When performing a system 30 bar(g)
pressure, high side
pressure test, the maximum allowed pressure
for the different components should not be Do not exceed 30 bar pressure difference
exceeded. between high pressure side and low pressure
side of the compressor because this will open the
For MT/MTZ compressors the maximum test internal compressor relief valve.
pressures are shown in the table beside.

Leak detection Whenever possible (if valves are present) the or HCFC refrigerants for leak detection of HFC
compressor must be kept isolated from the systems.
system. Perform a leak detection using the final
refrigerant. Pressurise with nitrogen or another Note 1: Leak detection with refrigerant may
neutral gas and use a leak detector for the not be allowed in some countries. Check local
applied refrigerant. Any spectrometric detection regulations.
system using helium can also be applied.
Note 2: Leak detecting additives shall not be
Eventual leaks shall be repaired respecting used as they may affect the lubricant properties.
the instructions written above. It is not
recommended to use other gasses such as Warranty may be voided if leak detecting
oxygen, dry air or acetylene as these gasses can additives have been used.
form an inflammable mixture. Never use CFC

Vacuum pull-down mois- Moisture obstructs the proper functioning of the lubricating properties of the oil. Air and moisture
ture removal compressor and the refrigeration system. also increase the risk of acid formation, giving
rise to copper platting. All these phenomena
Air and moisture reduce service life and increase can cause mechanical and electrical compressor
condensing pressure, and cause excessively high failure.
discharge temperatures, which can destroy the

34 AB196386425654en-011401
Application Guidelines Installation and service

To eliminate these factors, a vacuum pull- A new leak detection must be performed and
down according to the following procedure is the vacuum pull-down procedure should be
recommended: restarted from step 1. When the pressure slowly
 Whenever possible (if valves are present) increases, this indicates the presence of moisture.
the compressor must be kept isolated from the In this case step 2 and 3 should be repeated.
system.  Connect the compressor to the system by
 After the leak detection, the system must be opening the valves. Repeat step 2 and 3.
pulled-down under a vacuum of 500 microns  Break the vacuum with nitrogen or the final
(0.67 mbar). A two stage vacuum pump shall be refrigerant.
used with a capacity appropriate to the system  Repeat step 2 and 3 on the total system.
volume. It is recommended to use connection At commissioning, system moisture content may
lines with a large diameter and to connect these be up to 100 ppm. During operation the filter
to the service valves and not to the schrader drier must reduce this to a level < 20 ppm.
connection to avoid too high pressure losses.
 When the vacuum level of 500 micron is Do not use a megohmmeter or apply power
reached, the system must be isolated from the to the compressor while it is under vacuum, as
vacuum pump. Wait 30 minutes during which this may cause motor winding damage.
the system pressure should not rise. When the
pressure rapidly increases, the system is not leak R Never run the compressor under vacuum
tight. as it may cause compressor motor burn-out.

Start-up Before initial start-up or after a prolonged shut power for single phase compressors with trickle
down period, energise the crankcase heater circuit.
(if fitted) 12 hours prior to start-up, or turn on

Refrigerant charging R Zeotropic and «near-azeotropic» The refrigerant charge quantity must be suitable
refrigerant mixtures such as R404A, R407A/C/F, for both winter and summer operation. Refer
R448A, R449A and R454C must always be also to section “Protection against flooded starts
charged in the liquid phase. For the initial and liquid floodback” for information about
charge, the compressor must not run and service refrigerant charge limits.
valves must be closed. Charge refrigerant as
close as possible to the nominal system charge R when a liquid line solenoid valve is used,
before starting the compressor. Then slowly the vacuum in the low pressure side must be
add refrigerant in the liquid phase, on the low broken before applying power to the system.
pressure side as far away as possible from the
running compressor.

Oil charge and oil level The oil charge must be checked before contained in accessories such as oil separators
commissioning (1/4 to 3/4 of the oil sight glass). or oil traps). If this amount has already been
Check the oil level again after a minimum of 2 added and the oil level in the compressor keeps
hours operation at nominal conditions. In most decreasing, the oil return in the installation is
installations the initial compressor oil charge insufficient. Refer also to section "Piping design".
will be sufficient. In installations with line runs
exceeding 20 m or with many oil traps or an In installations where slow oil return is likely such
oil separator, additional oil may be required. as in multiple evaporator or multiple condenser
Normally the quantity of oil added should be installations, an oil separator is recommended.
no more than 2% of the total refrigerant charge Refer to the table section “Refrigerant and
(this percentage does not take into account oil lubricants” to select the correct oil.

Suction gas superheat The optimum suction gas superheat is 10K. A The maximum allowable superheat is about 30
lower superheat value will contribute to better K. Higher values can be accepted but in these
system performance (higher mass flow and cases, tests have to be performed to check that
more efficient use of evaporator surface). Low the maximum discharge temperature of 130°C
super­heat values however increase the risk of will not be exceeded. Note that high superheat
unwanted liquid floodback to the compressor. values decrease the compressor application
envelope and system performance.
For very low superheat values an electronically
controlled expansion valve is recommended.

AB196386425654en-011401 35
 Application Guidelines Ordering information and packaging

Packaging

Single pack Multipack Industrial pack

Model code 4 Gross Gross Gross

Dimensions Dimensions Static Dimensions Static
weight Nbr weight Nbr weight
(mm) (mm) stacking (mm) stacking
(kg) (kg) (kg)

MT/MTZ 018 23 197 278

MT/MTZ 022 23 197 278

1 cylinder

MT/MTZ 028 l: 330 25 l: 1150 213 l: 1150 302

w: 295 8 w: 800 4 12 w: 800 4
MT/MTZ 032 h: 385 26 h: 510 221 h: 500 314

MT/MTZ 036 27 229 326

MT/MTZ 040 27 229 326

MT/MTZ 044-050 39 244 236

2 cylinders

l: 395 l: 1150 l: 1150

MT/MTZ 056-064 w: 365 41 6 w: 800 256 4 6 w: 800 248 4
h: 455 h: 600 h: 600
MT/MTZ 072-080 43 268 260

MT/MTZ 100 70 291 381

4 cylinders

MT/MTZ 125 l: 470 73 l: 1150 303 l: 1150 399

w: 400 4 w: 800 4 6 w: 800 4
MT/MTZ 144 h: 650 76 h: 800 315 h: 710 417

MT/MTZ 160 76 315 417

Single pack: One compressor in a cardboard box.

In some publications this packaging may be indicated as individual packaging.
All single pack of 4 cylinder are shipped with a small 1/4 euro pallet (570 x 400 x 117 mm) under the individual box.
Multipack: A full pallet of compressors, each individually packed in a cardboard box. Mainly dedicated to wholesalers and Danfoss
distribution centres.
Industrial pack: A full pallet of unpacked compressors. Mainly dedicated to OEM customers.
In some publications this packaging may be indicated as ‘Multiple packaging.
Nbr: Number of compressor in a pack

36 AB196386425654en-011401
Application Guidelines Ordering information and packaging

MT compressors in industrial pack - R22

Code no.
Compressor 1 3 4 5 9
model 460/3/60
208-230/1/60 200-230/3/60 400/3/50 230/1/50 380/3/60

MT018 MT18-1VM MT18-3VM MT18-4VM MT18-5VM -

MT022 MT22-1VM MT22-3VM MT22-4VM MT22-5VM MT22-9VM
MT028 MT28-1VM MT28-3VM MT28-4VM MT28-5VM MT28-9VM
MT032 MT32-1VM MT32-3VM MT32-4VM MT32-5VM MT32-9VM
MT036 MT36-1VM MT36-3VM MT36-4VM MT36-5VM MT36-9VM
MT040 MT40-1VM MT40-3VM MT40-4VM - -
MT044 MT44-1VM MT44-3VM MT44-4VM - MT44-9VM
MT050 MT50-1VM MT50-3VM MT50-4VM - MT50-9VM
MT056 MT56-1VM MT56-3VM MT56-4VM - MT56-9VM
MT064 MT64-1VM MT64-3VM MT64-4VM - MT64-9VM
MT072 - MT72-3VM MT72-4VM - MT72-9VM
MT080 - MT80-3VM MT80-4VM - MT80-9VM
MT100 - MT100-3VM MT100-4VM - MT100-9VM
MT125 - MT125-3VM MT125-4VM - MT125-9VM
MT144 - MT144-3VM MT144-4VM - MT144-9VM
MT160 - MT160-3VM MT160-4VM - MT160-9VM

VM = Compressor, threaded oil sight glass, 3/8" oil equalisation connection

AB196386425654en-011401 37
 Application Guidelines Ordering information and packaging

MT compressors in single pack - R22

Code no.
Compressor 1 3 4 5 6 7 9
model 460/3/60 575/3/60
208-230/1/60 200-230/3/60 230/1/50 230/3/50 380/3/60
400/3/50 500/3/50
MT018 MT18-1VI MT18-3VI MT18-4VI MT18-5VI - - -

MT022 MT22-1VI MT22-3VI MT22-4VI MT22-5VI MT22-6VI - MT22-9VI

MT028 MT28-1VI MT28-3VI MT28-4VI MT28-5VI MT28-6VI - MT28-9VI

MT032 MT32-1VI MT32-3VI MT32-4VI MT32-5VI MT32-6VI - -

MT036 MT36-1VI MT36-3VI MT36-4VI MT36-5VI MT36-6VI - MT36-9VI

MT040 MT40-1VI MT40-3VI MT40-4VI - MT40-6VI - -

MT044 - MT44-3VI MT44-4VI - - - MT44-9VI

MT050 MT50-1VI MT50-3VI MT50-4VI - MT50-6VI - MT50-9VI

MT056 MT56-1VI MT56-3VI MT56-4VI - MT56-6VI MT56-7VI MT56-9VI

MT064 MT64-1VI MT64-3VI MT64-4VI - MT64-6VI - MT64-9VI

MT072 - MT72-3VI MT72-4VI - - - MT72-9VI

MT080 - MT80-3VI MT80-4VI - MT80-6VI - MT80-9VI

MT100 - MT100-3VI MT100-4VI - MT100-6VI MT100-7VI MT100-9VI

MT125 - MT125-3VI MT125-4VI - MT125-6VI MT125-7VI MT125-9VI

MT144 - MT144-3VI MT144-4VI - - MT144-7VI MT144-9VI

MT160 - MT160-3VI MT160-4VI - MT160-6VI MT160-7VI MT160-9VI

VI = Single compressor, threaded oil sight glass, 3/8" oil equalisation connection

38 AB196386425654en-011401
Application Guidelines Ordering information and packaging

MTZ compressors in industrial pack

R404A / R507 / R134a / R407A / C / F / R448A / R449A / R452A / R454C* / R513A
Code no.
Compressor 1 3 4 5 9
model 460/3/60
208-230/1/60 200-230/3/60 230/1/50 380/3/60
400/3/50
MTZ018 MTZ18-1VM MTZ18-3VM MTZ18-4VM* MTZ18-5VM* -
MTZ022 MTZ22-1VM MTZ22-3VM MTZ22-4VM* MTZ22-5VM* MTZ22-9VM
MTZ028 MTZ28-1VM MTZ28-3VM MTZ28-4VM* MTZ28-5VM* MTZ28-9VM
MTZ032 MTZ32-1VM MTZ32-3VM MTZ32-4VM* MTZ32-5VM* MTZ32-9VM
MTZ036 MTZ36-1VM MTZ36-3VM MTZ36-4VM* MTZ36-5VM* MTZ36-9VM
MTZ040 MTZ40-1VM MTZ40-3VM MTZ40-4VM* - -
MTZ044 MTZ44-1VM MTZ44-3VM MTZ44-4VM - MTZ44-9VM
MTZ050 MTZ50-1VM MTZ50-3VM MTZ50-4VM - MTZ50-9VM
MTZ056 MTZ56-1VM MTZ56-3VM MTZ56-4VM - MTZ56-9VM
MTZ064 MTZ64-1VM MTZ64-3VM MTZ64-4VM - MTZ64-9VM
MTZ072 - MTZ72-3VM MTZ72-4VM - MTZ72-9VM
MTZ080 - MTZ80-3VM MTZ80-4VM - MTZ80-9VM
MTZ100 - MTZ100-3VM MTZ100-4VM - MTZ100-9VM
MTZ125 - MTZ125-3VM MTZ125-4VM - MTZ125-9VM
MTZ144 - MTZ144-3VM MTZ144-4VM - MTZ144-9VM
MTZ160 - MTZ160-3VM MTZ160-4VM - MTZ160-9VM

VM = Compressor, threaded oil sight glass, 3/8" oil equalisation connection

* Qualifed with R454C.

AB196386425654en-011401 39
 Application Guidelines Ordering information and packaging

MTZ compressors in single pack

R404A/R507 / R134a / R407A/C/F / R448A/R449A / R452A / R454C**/ R513A
Code no.
Compressor 1 3 4 5 6 7 9
model 460/3/60 575/3/60
208-230/1/60 200-230/3/60 230/1/50 230/3/50 380/3/60
400/3/50 500/3/50

MTZ018 MTZ18-1VI MTZ18-3VI MTZ18-4VI* MTZ18-5VI* - - -

MTZ022 MTZ22-1VI MTZ22-3VI MTZ22-4VI* MTZ22-5VI* MTZ22-6VI - MTZ22-9VI

MTZ028 MTZ28-1VI MTZ28-3VI MTZ28-4VI* MTZ28-5VI* MTZ28-6VI - MTZ28-9VI

MTZ032 MTZ32-1VI MTZ32-3VI MTZ32-4VI* MTZ32-5VI* MTZ32-6VI MTZ32-7VI MTZ32-9VI

MTZ036 MTZ36-1VI MTZ36-3VI MTZ36-4VI* MTZ36-5VI* MTZ36-6VI MTZ36-7VI MTZ36-9VI

MTZ040 MTZ40-1VI MTZ40-3VI MTZ40-4VI* - MTZ40-6VI - -

MTZ044 MTZ44-1VI MTZ44-3VI MTZ44-4VI - MTZ44-6VI MTZ44-7VI MTZ44-9VI

MTZ050 MTZ50-1VI MTZ50-3VI MTZ50-4VI - MTZ50-6VI MTZ50-7VI MTZ50-9VI

MTZ056 MTZ56-1VI MTZ56-3VI MTZ56-4VI - MTZ56-6VI MTZ56-7VI MTZ56-9VI

MTZ064 MTZ64-1VI MTZ64-3VI MTZ64-4VI - MTZ64-6VI - MTZ64-9VI

MTZ072 - MTZ72-3VI MTZ72-4VI - MTZ72-6VI - MTZ72-9VI

MTZ080 - MTZ80-3VI MTZ80-4VI - MTZ80-6VI - MTZ80-9VI

MTZ100 - MTZ100-3VI MTZ100-4VI - MTZ100-6VI MTZ100-7VI MTZ100-9VI

MTZ125 - MTZ125-3VI MTZ125-4VI - MTZ125-6VI MTZ125-7VI MTZ125-9VI

MTZ144 - MTZ144-3VI MTZ144-4VI - - MTZ144-7VI MTZ144-9VI

MTZ160 - MTZ160-3VI MTZ160-4VI - MTZ160-6VI MTZ160-7VI MTZ160-9VI

VI = Single compressor, threaded oil sight glass, 3/8" oil equalisation connection
* Qualifed with R454C.

40 AB196386425654en-011401
Application Guidelines Updates

Current version updates

• Page 4: and then in the whole document-The safety and reliability risk icons are added
• Page 7: Pressure equipment directive - Refrigerant Group 1 is added
• Page 12: Nominal performance data for R454C is added
• Page 15: Operating envelope for R454C is added
• Page 24: Soft starter with flammable refrigeration - recommendation
• Page 25: Refrigerants and lubricants - R454C with POE oil is added
• Page 27: Refrigerants and lubricants - R454C is added
• Page 29: Pressures for R454C are added
• Page 31: Crankcase heater recommendation updated
• Page 32: Sound data for R454C is added
• Page 33: Accessories - Mounting kits code numbers are updated

AB196386425654en-011401 41
Danfoss Cooling
is a worldwide manufacturer of compressors and condensing units for refrigeration and HVAC applications. With a wide range
of high quality and innovative products we help your company to find the best possible energy efficient solution that respects
the environment and reduces total life cycle costs.

We have 40 years of experience within the development of hermetic compressors which has brought us amongst the 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.

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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.

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