Danfoss scroll PSH051 to 077 serie - GB - SI User guide

Brand: Danfoss

Model: scroll PSH051 to 077 serie - GB - SI

Type: User guide

Danfoss scroll compressors

PSH051 to 077

50-60 Hz - R410A

Application guidelines

http://cc.danfoss.com

Content

Compressor features ............................................................................................................5

Nomenclature and specications ........................................................................................6

Compressor nomenclature ...................................................................................................................................................................... 6

Compressor specications ....................................................................................................................................................................... 6

Performance data - 50 Hz ..................................................................................................... 7

Cooling ............................................................................................................................................................................................................ 7

Heating ............................................................................................................................................................................................................7

Performance data - 60 Hz ..................................................................................................... 8

Dimensions ...........................................................................................................................9

PSH051 ............................................................................................................................................................................................................ 9

PSH064 ..........................................................................................................................................................................................................10

PSH077 ..........................................................................................................................................................................................................11

Electrical data, connections and wiring ............................................................................12

Connection details ....................................................................................................................................................................................12

Suction and discharge connections ...................................................................................................................................................12

Oil sight glass ..............................................................................................................................................................................................12

Oil equalisation connection...................................................................................................................................................................12

Oil drain connection .................................................................................................................................................................................12

Schrader ........................................................................................................................................................................................................12

Liquid injection valve ...............................................................................................................................................................................12

Motor voltage .............................................................................................................................................................................................13

Voltage unbalance ....................................................................................................................................................................................13

Electrical data .............................................................................................................................................................................................. 13

Wiring Connections ..................................................................................................................................................................................14

General wiring information ...................................................................................................................................................................15

Electrical box knock-out dimensions .................................................................................................................................................16

IP rating .........................................................................................................................................................................................................16

Electrical box temperature .....................................................................................................................................................................16

Approval and certications ...............................................................................................17

Approvals and certicates ......................................................................................................................................................................17

Pressure equipment directive 2014/68/EU ..................................................................................................................17

Low voltage directive 2014/35/EU ..................................................................................................................................17

Machines directive 2006/42/EC .......................................................................................................................................17

Electromagnetic compatibility directive 2014/30/EU ..................................................................................................................17

Operating conditions .........................................................................................................18

Refrigerant and lubricants......................................................................................................................................................................18

Motor supply ...............................................................................................................................................................................................18

Compressor ambient temperature .....................................................................................................................................................18

Compressor protection ...........................................................................................................................................................................19

Phase sequence and reverse rotation protection ..........................................................................................................................20

Application envelope ...............................................................................................................................................................................20

Pressure transmitter accuracy and range .........................................................................................................................................23

Liquid injection ..........................................................................................................................................................................................23

Discharge temperature protection .....................................................................................................................................................23

Malfunction protection ...........................................................................................................................................................................24

High and low pressure protection.......................................................................................................................................................24

Cycle rate limit ............................................................................................................................................................................................26

Data management .............................................................................................................. 27

Data storage displayed by OCS ............................................................................................................................................................27

MMIMYK and MMIGRS Electronic controllers..................................................................................................................................27

Data read-out ..............................................................................................................................................................................................28

Data storage recovery .............................................................................................................................................................................. 28

3FRCC.PC.021.A5.02

Application Guidelines

Content

CAN-Bus and Modbus RS485 Communication ................................................................. 29

Compressor address set-up for CAN-Bus and Modbus ...............................................................................................................29

CAN-Bus and Modbus communication with OCS .........................................................................................................................30

Measurements ............................................................................................................................................................................................31

Alarms and warning .................................................................................................................................................................................32

System design recommendations .....................................................................................33

General ..........................................................................................................................................................................................................33

Essential piping design considerations .............................................................................................................................................33

O-cycle migration ...................................................................................................................................................................................34

Liquid ood back .......................................................................................................................................................................................35

Oil equalisation ..........................................................................................................................................................................................36

Specic application recommendations ............................................................................37

Low ambient application ........................................................................................................................................................................37

Low load operation ...................................................................................................................................................................................38

Brazed plate heat exchangers ...............................................................................................................................................................38

Electronic expansion valve ....................................................................................................................................................................38

Reversible heat pump systems .............................................................................................................................................................38

Discharge line and reversing valve .....................................................................................................................................................38

Defrost and reverse cycle .......................................................................................................................................................................39

Suction line accumulator ........................................................................................................................................................................39

Water utilizing systems ............................................................................................................................................................................39

Sound and vibration management ...................................................................................40

Starting sound level..................................................................................................................................................................................40

Running sound level ................................................................................................................................................................................40

Stopping sound level ...............................................................................................................................................................................40

Installation ..........................................................................................................................41

Compressor handling and storage......................................................................................................................................................41

Compressor mounting ............................................................................................................................................................................41

Parallel mounting ......................................................................................................................................................................................42

Tandem and trio Handling .....................................................................................................................................................................44

Compressor holding charge ..................................................................................................................................................................44

System cleanliness ....................................................................................................................................................................................45

Tubing ............................................................................................................................................................................................................45

Brazing and soldering ..............................................................................................................................................................................45

System pressure test ................................................................................................................................................................................47

Leak detection ............................................................................................................................................................................................47

Vacuum evacuation and moisture removal .....................................................................................................................................47

Filter driers ...................................................................................................................................................................................................48

Refrigerant charging ................................................................................................................................................................................48

Refrigerant charge limit ..........................................................................................................................................................................48

Insulation resistance and dielectric strength ..................................................................................................................................49

Commissioning ..........................................................................................................................................................................................50

Oil level checking and top-up ............................................................................................................................................................... 50

Ordering information and packaging ...............................................................................51

Packaging .....................................................................................................................................................................................................51

Ordering information ...............................................................................................................................................................................52

Industrial pack ............................................................................................................................................................................................52

Accessories .......................................................................................................................... 53

Valves, adapters, connectors & gaskets for use on suction and discharge connections ................................................. 53

Acoustic hoods and spare parts ...........................................................................................................................................................54

Lubricants / oils ..........................................................................................................................................................................................55

Miscellaneous .............................................................................................................................................................................................55

Sensors & cables ........................................................................................................................................................................................55

Communication tools ..............................................................................................................................................................................55

4 FRCC.PC.021.A5.02

Application Guidelines

Liquid injection is controlled by a discharge gas

temperature sensor connected to the OCS.

CAN-Bus connection between manifolded

compressors allows the use of only one HP

sensor and one LP sensor.

A Modbus connection allows the information

exchange between the unit main board (PLC)

and the compressor’s boards (OCS).

Danfoss PSH scroll compressor is optimized for

heat pump applications. Beside scroll elements

pressure ratio optimization, PSH includes 2 major

new technologies: liquid injection and Operating

Control System (OCS).

PSH scroll compressor is also equipped with

several prewired devices such as discharge

temperature sensor, surface sump heater (SSH)

and Liquid Injection Valve (LIV).

Compressor features

Discharge Temperature Sensor

Operating Control System (OCS):

Motor protection

Liquid Injection Valve control

Operating envelope monitoring

Data storage management

Oil surface sump heater control

CAN-Bus/ Modbus Connections

Liquid injection valve (LIV)

Pre-mounted surface sump heater

(SSH) with insulation

5FRCC.PC.021.A5.02

Application Guidelines

Compressor

nomenclature

Compressor

specications

Danfoss PSH scroll compressors for R410A are

available as single compressors.

The example below presents the compressor

nomenclature which equals to the technical

reference as shown on the compressor

nameplate.

Code numbers for ordering are listed in section

“Ordering information and packaging” at the end

of this document.

Nomenclature and specications

Model

Nominal

Heating

capacity

Nominal

Cooling

capacity

Power Input

Heating

COP

Cooling

COP

Swept

volume

Displacement



Oil charge

Net weight



W W W W/W W/W cm

/rev m

/h dm

50Hz

PSH051 53337 36167 17170 3.11 2.11 227.6 39.6 6.7 108

PSH064 65481 44683 21575 3.04 2.07 286.2 49.8 6.7 153

PSH077 80303 55051 25979 3.09 2.12 344.6 60 6.7 161

60Hz

PSH051 64057 43436 20621 3.11 2.11 227.6 47. 8 6.7 108

PSH064 78643 53665 25911 3.04 2.07 286.2 60.1 6.7 153

PSH077 96114 66061 31175 3.08 2.12 344.6 72.4 6.7 161

Conditions: Evaporating temperature: -7°C Condensing temperature: 50°C Superheat: 5K Subcooling:5K Refrigerant: R410A

 Displacement at nominal speed: 2900rpm at 50Hz. 3500rpm at 60Hz

 Net weight with oil charge

AKA4A064SHP

Heat pump

application

Scroll (commercial /

large commercial)

Lubricant

R410A, POE

Heating capacity

in kW at 50Hz

-7°C/50°C/SH5K/SC5K

UL index

4: 380-415V/3~/50 Hz - 460V/3~/60 Hz

9: 380V/3~/60 Hz

Evolution index

Motor protection type

K: 230V OCS

Connections

A: brazed connections

Motor voltage code

6 FRCC.PC.021.A5.02

Application Guidelines

Performance data - 50 Hz

Model

Cooling

(W)

(kW)

Cooling

(W)

(kW)

Cooling

(W)

(kW)

Cooling

(W)

(kW)

Cooling

(W)

(kW)

Cooling

(W)

(kW)

Cooling

(W)

(kW)

Cooling

(W)

(kW)

Cooling

(W)

(kW)

Te -30 -20 -10 -5 0 5 10 15 20

PSH051-4

20 19 440 8.76 30 420 9.74 45 380 11.13 54 580 12.02 65 060 13.07 76 910 14.28 - - - - - -

30 17 380 10.34 27 520 11.24 41 210 12.48 49 620 13.26 59 200 14.19 70 060 15.27 82 270 16.52 95 950 17.96 - -

40 15 160 12.37 24 440 13.22 36 850 14.34 44 470 15.05 53 150 15.87 63 000 16.83 74 100 17.94 86 560 19.23 100 470 20.70

50 12 680 14.92 21 080 15.76 32 190 16.80 39 000 17.44 46 780 18.18 55 610 19.03 65 600 20.03 76 830 21.17 89 410 22.50

60 - - 17 310 18.93 27 110 19.92 33 110 20.51 39 970 21.19 47 780 21.96 56 640 22.85 66 640 23.88 77 880 25.10

68 - - - - 22 660 22.95 28 010 23.52 34 120 24.15 41 110 24.87 49 060 25.69 58 070 26.64 - -

PSH064-4

20 24 450 11.18 38 160 12.35 57 180 13.98 69 030 15.06 82 630 16.34 98 110 17. 88 - - - - - -

30 21 960 13.06 34 460 14.24 51 610 15.70 62 280 16.63 74 530 17.72 88 500 19.02 104 340 20.56 122 190 22.36 - -

40 19 170 15.36 30 520 16.66 45 870 18.07 55 390 18.89 66 330 19.85 78 830 20.97 93 020 22.28 109 060 23.83 127 090 25.60

50 15 900 18.13 26 180 19.65 39 780 21.11 48 190 21.90 57 850 22.77 68 910 23.77 81 500 24.91 95 770 26.24 111 850 27.80

60 - - 21 260 23.25 33 190 24.87 40 520 25.68 48 930 26.53 58 580 27.45 69 600 28.48 82 130 29.66 96 310 31.00

68 - - - - 27 440 28.43 33 920 29.29 41 370 30.16 49 910 31.06 59 690 32.04 70 860 33.13 - -

PSH077-4

20 30 220 13.72 46 750 15.15 69 640 17. 37 83 940 18.81 100 370 20.46 119 130 22.34 - - - - - -

30 27 030 15.93 42 390 17.20 63 380 19.21 76 450 20.51 91 480 22.02 108 660 23.74 128 180 25.68 150 210 27.85 - -

40 23 650 18.81 37 630 19.97 56 520 21.81 68 280 23.00 81 810 24.38 97 310 25.97 114 970 27.76 134 960 29.76 157 480 32.00

50 20 030 22.53 32 430 23.63 49 030 25.34 59 370 26.44 71 310 27.73 85 040 29.19 100 740 30.85 118 590 32.71 138 790 34.80

60 - - 26 740 28.33 40 860 29.96 49 680 31.00 59 920 32.21 71 780 33.59 85 420 35.14 101 050 36.88 118 830 38.80

68 - - - - 33 790 34.56 41 330 35.57 50 150 36.73 60 430 38.05 72 370 39.53 86 130 41.19 - -

Model

Heating

(W)

(kW)

Heating

(W)

(kW)

Heating

(W)

(kW)

Heating

(W)

(kW)

Heating

(W)

(kW)

Heating

(W)

(kW)

Heating

(W)

(kW)

Heating

(W)

(kW)

Heating

(W)

(kW)

Te -30 -20 -10 -5 0 5 10 15 20

PSH051-4

20 28 200 8.76 40 160 9.74 56 500 11.13 66 600 12.02 78 120 13.07 91 190 14.28 - - - - - -

30 27 720 10.34 38 750 11. 24 53 680 12.48 62 880 13.26 73 400 14.19 85 330 15.27 98 790 16.52 113 910 17.96 - -

40 27 530 12.37 37 660 13.22 51 190 14.34 59 510 15.05 69 020 15.87 79 830 16.83 92 050 17.9 4 105 790 19.23 121 160 20.70

50 27 600 14.92 36 840 15.76 48 990 16.80 56 440 17.4 4 64 950 18.18 74 640 19.03 85 620 20.03 98 000 21.17 111 9 0 0 22.50

60 - - 36 240 18.93 47 030 19.92 53 620 20.51 61 150 21.19 69 730 21.96 79 490 22.85 90 520 23.88 102 930 25.10

68 - - - - 45 620 22.95 51 520 23.52 58 270 24.15 65 980 24.87 74 750 25.69 84 710 26.64 - -

PSH064-4

20 35 230 11.18 50 070 12.35 70 660 13.98 83 550 15.06 98 380 16.34 115 34 0 17.88 - - - - - -

30 34 550 13.06 48 190 14.24 66 750 15.70 78 300 16.63 91 610 17.72 106 840 19.02 124 160 20.56 143 750 22.36 - -

40 33 970 15.36 46 580 16.66 63 280 18.07 73 600 18.89 85 460 19.85 99 040 20.97 114 510 22.28 132 030 23.83 151 790 25.60

50 33 380 18.13 45 120 19.65 60 130 21.11 69 300 21.90 79 800 22.77 91 820 23.77 105 510 24.91 121 070 26.24 138 640 27.80

60 - - 43 670 23.25 57 170 24.87 65 270 25.68 74 510 26.53 85 040 27.45 97 050 28.48 110 720 29.66 126 200 31.00

68 - - - - 54 850 28.43 62 160 29.29 70 440 30.16 79 850 31.06 90 580 32.04 102 790 33.13 - -

PSH077-4

20 43 550 13.72 61 470 15.15 86 530 17.37 102 210 18.81 120 260 20.46 140 850 22.34 - - - - - -

30 42 520 15.93 59 110 17. 20 82 050 19.21 96 380 20.51 112 880 22.02 131 740 23.74 153 140 25.68 177 280 27. 85 - -

40 41 940 18.81 57 040 19.97 77 720 21.81 90 630 23.00 105 510 24.38 122 550 25.97 141 950 27.76 163 890 29.76 188 570 32.00

50 41 930 22.53 55 400 23.63 73 660 25.34 85 070 26.44 98 260 27.73 113 410 29.19 130 730 30.85 150 390 32.71 172 600 34.80

60 - - 54 280 28.33 69 980 29.96 79 810 31.00 91 230 32.21 104 420 33.59 119 580 35.14 136 890 36.88 156 550 38.80

68 - - - - 67 380 34.56 75 900 35.57 85 850 36.73 97 420 38.05 110 790 39.53 126 170 41.19 - -

Refrigerant: R410A Frequency : 50 Hz Subcooling: 5K Superheat: 5K

Cooling

Heating

7FRCC.PC.021.A5.02

Application Guidelines

Performance data - 60 Hz

Cooling

Heating

Cooling

(W)

(kW)

Cooling

(W)

(kW)

Cooling

(W)

(kW)

Cooling

(W)

(kW)

Cooling

(W)

(kW)

Cooling

(W)

(kW)

Cooling

(W)

(kW)

Cooling

(W)

(kW)

Cooling

(W)

(kW)

Te -30 -20 -10 -5 0 5 10 15 20

PSH051-4

20 23 350 10.52 36 540 11. 69 54 500 13.36 65 550 14.43 78 130 15.69 92 360 17.15 - - - - - -

30 20 870 12.42 33 050 13.50 49 490 14.98 59 590 15.93 71 100 17.04 84 140 18.34 98 810 19.84 115 230 21.57 - -

40 18 210 14.86 29 350 15.88 44 260 17.22 53 400 18.07 63 830 19.06 75 660 20.21 89 000 21.55 103 960 23.09 120 660 24.90

50 15 230 17.92 25 310 18.93 38 660 20.18 46 840 20.94 56 180 21.83 66 790 22.86 78 780 24.05 92 270 25.43 107 380 27.00

60 - - 20 790 22.73 32 560 23.93 39 760 24.64 48 000 25.44 57 380 26.37 68 020 27.44 80 030 28.68 93 530 30.10

68 - - - - 27 220 27.57 33 630 28.24 40 980 29.00 49 370 29.87 58 920 30.86 69 740 31.99 - -

PSH064-4

20 29 360 13.43 45 840 14.84 68 680 16.80 82 910 18.08 99 240 19.63 117 830 21.47 - - - - - -

30 26 370 15.68 41 390 17.10 61 980 18.86 74 800 19.97 89 510 21.28 106 290 22.84 125 320 24.69 146 750 26.86 - -

40 23 020 18.45 36 650 20.01 55 080 21.70 66 520 22.69 79 660 23.84 94 670 25.18 111 720 26.76 130 990 28.61 152 630 30.80

50 19 100 21.77 31 440 23.60 47 780 25.35 57 870 26.30 69 480 27.35 82 760 28.55 97 880 29.92 115 020 31.52 134 340 33.40

60 - - 25 530 27.92 39 860 29.87 48 660 30.84 58 770 31.86 70 350 32.97 83 590 34.21 98 640 35.62 115 670 37. 20

68 - - - - 32 960 34.15 40 740 35.18 49 680 36.22 59 940 37.31 71 690 38.49 85 100 39.79 - -

PSH077-4

20 36 260 16.46 56 100 18.18 83 570 20.85 100 720 22.57 120 440 24.55 142 960 26.81 - - - - - -

30 32 440 19.12 50 860 20.64 76 050 23.05 91 740 24.61 109 780 26.42 130 400 28.48 153 810 30.82 180 250 33.42 - -

40 28 390 22.58 45 160 23.97 67 830 26.17 81 930 27.60 98 170 29.26 116 780 31.16 137 960 33.31 161 960 35.71 188 970 38.40

50 24 040 27.04 38 920 28.35 58 840 30.40 71 240 31.73 85 570 33.27 102 040 35.03 120 880 37.02 142 310 39.26 166 550 41.70

60 - - 32 090 33.99 49 030 35.95 59 610 37. 20 71 910 38.65 86 130 40.30 102 510 42.17 121 260 44.25 142 600 46.60

68 - - - - 40 540 41.47 49 590 42.68 60 180 44.08 72 520 45.66 86 840 47.44 103 360 49.43 - -

Heating

(W)

(kW)

Heating

(W)

(kW)

Heating

(W)

(kW)

Heating

(W)

(kW)

Heating

(W)

(kW)

Heating

(W)

(kW)

Heating

(W)

(kW)

Heating

(W)

(kW)

Heating

(W)

(kW)

Te -30 -20 -10 -5 0 5 10 15 20

PSH051-4

20 33 870 10.52 48 230 11.69 67 860 13.36 79 980 14.43 93 820 15.69 109 520 17.15 - - - - - -

30 33 290 12.42 46 540 13.50 64 470 14.98 75 520 15.93 88 150 17.04 102 480 18.34 118 650 19.84 136 800 21.57 - -

40 33 070 14.86 45 230 15.88 61 480 17. 22 71 470 18.07 82 890 19.06 95 870 20.21 110 550 21.55 127 050 23.09 145 520 24.90

50 33 140 17.92 44 240 18.93 58 840 20.18 67 780 20.94 78 010 21.83 89 650 22.86 102 830 24.05 117 70 0 25.43 134 390 27.00

60 - - 43 520 22.73 56 490 23.93 64 400 24.64 73 440 25.44 83 750 26.37 95 460 27.4 4 108 710 28.68 123 620 30.10

68 - - - - 54 790 27. 57 61 880 28.24 69 980 29.00 79 240 29.87 89 780 30.86 101 730 31.99 - -

PSH064-4

20 42 310 13.43 60 140 14.84 84 870 16.80 100 340 18.08 118 160 19.63 138 530 21.47 - - - - - -

30 41 490 15.68 57 870 17.10 80 160 18.86 94 040 19.97 110 020 21.28 128 310 22.84 149 110 24.69 172 6 40 26.86 - -

40 40 800 18.45 55 940 20.01 76 000 21.70 88 390 22.69 102 640 23.84 118 950 25.18 137 520 26.76 158 570 28.61 182 300 30.80

50 40 080 21.77 54 180 23.60 72 220 25.35 83 230 26.30 95 840 27.35 110 270 28.55 126 720 29.92 145 400 31.52 166 510 33.40

60 - - 52 450 27.92 68 660 29.87 78 390 30.84 89 480 31.86 102 140 32.97 116 56 0 34.21 132 970 35.62 151 570 37.20

68 - - - - 65 880 34.15 74 660 35.18 84 600 36.22 95 900 37. 31 108 790 38.49 123 460 39.79 - -

PSH077-4

20 52 130 16.46 73 620 18.18 103 670 20.85 122 480 22.57 14 4 110 24.55 168 800 26.81 - - - - - -

30 50 870 19.12 70 760 20.64 98 270 23.05 115 460 24.61 135 250 26.42 157 850 28.48 183 520 30.82 212 470 33.42 - -

40 50 150 22.58 68 260 23.97 93 060 26.17 108 540 27. 6 0 126 380 29.26 146 810 31.16 170 070 33.31 196 380 35.71 225 970 38.40

50 50 100 27.04 66 250 28.35 88 150 30.40 101 830 31.73 117 6 40 33.27 135 810 35.03 156 570 37.02 180 150 39.26 206 780 41.70

60 - - 64 860 33.99 83 680 35.95 95 480 37.20 109 170 38.65 124 990 40.30 143 160 42.17 163 920 44.25 187 490 46.60

68 - - - - 80 520 41.47 90 740 42.68 102 670 44.08 116 54 0 45.66 132 570 47.4 4 151 010 49.43 - -

Refrigerant: R410A Frequency : 60 Hz Subcooling: 5K Superheat: 5K

8 FRCC.PC.021.A5.02

Application Guidelines

PSH051

Rigid spacer

Flexible grommet (accessory)

All dimensions in mm

Ø 257.5

Ø 317.8

652.5

617

208

205.2

301

143.75

345.4

434

236

179

258

353

60°

8°

60°

183

195

171

10°

279.4

168.4

81.7

304.8

370.8

4x holes

Ø19.43

Rigid spacer x 4

531 ±1.2

Ø 265.9

HM 8 bolt

Lock washer

Flat washer

Rigid spacer

Nut

29.5 mm

HM 8 bolt

Lock washer

Flat washer

teel mounting sleeve

Rubber grommet

Nut

28 mm

Compressor

base plate

Dimensions

9FRCC.PC.021.A5.02

Application Guidelines

PSH064

Rigid spacer

All dimensions in mm

Flexible grommet (accessory)

HM 8 bolt

Lock washer

Flat washer

teel mounting sleeve

Rubber grommet

Nut

28 mm

Compressor

base plate

Ø 333.2

Ø 318.1

693

634

208

202.2

301

76.1

345.4

279.4

168.6

204

195

183

60°

10°

8°

60°

436

238

258

357

179

81.5

304.8

370.8

4xhole

Ø19.43

Rigid spacer x4

143.1

492 ±1.2

Dimensions

HM 8 bolt

Lock washer

Flat washer

Rigid spacer

Nut

29.5 mm

10 FRCC.PC.021.A5.02

Application Guidelines

Dimensions

PSH077

Rigid spacer

Flexible grommet (accessory)

HM 8 bolt

Lock washer

Flat washer

teel mounting sleeve

Rubber grommet

Nut

28 mm

Compressor

base plate

Ø 333.2

524.3 ±1.2

Ø 318.1

4x holes

Ø 19.43

725.3

666.3

208

202.2

301

143.1

76.1

Rigid spacer x4

345.4

279.4

195

204

436

238

179

258

357

81.5

304.8

370.8

168.6

183

60°

8°

10°

All dimensions in mm

HM 8 bolt

Lock washer

Flat washer

Rigid spacer

Nut

29.5 mm

11FRCC.PC.021.A5.02

Application Guidelines

Electrical data, connections and wiring

Suction and discharge

connections

Oil sight glass

Oil equalisation

connection

Oil drain connection

Schrader

Liquid injection valve

All Danfoss PSH scroll compressors come

equipped with a sight glass (1"1/8 - 18 UNF)

which may be used to determine the amount

and condition of the oil contained within the

sump.

PSH051-064-077 are equipped with a 2"1/4

rotolock connector allowing the use of 2"1/4

- 1"3/8 or 2"1/4 - 1"5/8 sleeve. This connection

must be used to mount the oil equalisation line

when two or more compressors are mounted

in parallel (please refer to section ”Parallel

mounting” for details).

The oil drain connection allows oil to be removed

from the sump for changing, testing, etc. The

tting contains an extension tube into the oil

sump to more eectively remove the oil. The

connection is a female 1/4" SAE are tting

The oil ll connection and gauge port is a 1/4"

male are connector incorporating a Schrader

valve.

The liquid injection valve (LIV) comes equipped

with process tube, maintained by a bracket,

assembled on compressor shell. This process

tube is to be connected with a 1/4" piping to the

system liquid line.

During commissioning, check that the LIV coil

is correctly positioned on the LIV body. One of

the lock pins on the coil must t into one of the

dents on the valve body.

Connection details

PSH051-064-077

AJ-AK

Suction and discharge connections Brazed

Oil sight glass Threaded

Oil equalization connection Rotolock 2"1/4

Oil drain connection 1/4" SAE are

Low pressure gauge port (schrader) 1/4" SAE are

Liquid Injection Valve connection tube 1/4" ODF

Tube ODF

PSH051-064-077

Suction 1"5/8

Discharge 1"1/8

1/4"

Process tube

Support bracket

Liquid Injection Valve (LIV)

Coil

12 FRCC.PC.021.A5.02

Application Guidelines

Electrical data, connections and wiring

Voltage unbalance

Electrical data

LRA (Locked Rotor Amp)

MCC (Maximum Continuous

Current)

Max. operating current

The operating voltage limits are shown in the

table section ”Motor voltage“. The voltage

applied to the motor terminals must lie within

these table limits during both start-up and

normal operations. The maximum allowable

voltage unbalance is 2%. Voltage unbalance

causes high amperage over one or several

phases, which in turn leads to overheating and

possible motor damage. Voltage unbalance is

given by the formula:

Vavg = Mean voltage of phases 1, 2, 3.

V1-2 = Voltage between phases 1 & 2.

V1-3 = Voltage between phases 1 & 3.

V2-3 = Voltage between phases 2 & 3.

Locked Rotor Amp value is the highest average

current as measured on mechanically blocked

compressor tested under nominal voltage. The

LRA value can be used as rough estimation for

the starting current. However in most cases, the

real starting current will be lower. A soft starter

can be applied to reduce starting current.

The MCC is the current at which the motor

protection trips under maximum load and

low voltage conditions. This MCC value is the

maximum at which the compressor can be

operated in transient conditions and out of the

application envelope. Above this value, the OCS

will cut-out the compressor to protect the motor.

The max. operating current is the current when

the compressors operates at maximum load

conditions and 10% below nominal voltage

(+15°C evaporating temperature and +68°C

condensing temperature). Max. operating

current can be used to select cables and

contactors.

In normal operation, the compressor current

consumption is always less than the Max

operating A. value.

Motor voltage

% voltage unbalance= _______________________________________________ x100

2 x Vavg

Motor voltage code Code 4 Code 9

50Hz

Nominal voltage 380- 415V~3 -

Voltage range 357-440V~3 -

60Hz

Nominal voltage 460V~3 380V~3

Voltage range 415-506V~3 342-418V~3

Compressor models

LRA MCC

Maximum

operating current

Winding

resistance

A A A Ω

Motor code 4

PSH051 211 60 50 0.57

PSH064 248 72 64 0.48

PSH077 319 83 78 0.39

Motor code 9

PSH051 273 66 61 0.38

PSH064 315 90 79 0.33

PSH077 399 98 91 0.27

13FRCC.PC.021.A5.02

Application Guidelines

Electrical data, connections and wiring

Compressor power

supply

Operating Control System

(OCS) power supply

Winding resistance is the resistance between

phases at 25°C (resistance value +/- 7%).

Winding resistance is generally low and it

requires adapted tools for precise measurement.

Use a digital ohm-meter, a ”4 wires“ method and

measure under stabilised ambient temperature.

Winding resistance varies strongly with winding

temperature ; if the compressor is stabilised at a

dierent value than 25°C, the measured

resistance must be corrected with following

formula:

a + t

amb

= R

25°C

_________

a + t

25°C

: reference temperature = 25°C

amb

: temperature during measurement (°C)

25°C

: winding resistance at 25°C

amb

: winding resistance at tamb

Coecient a = 234.5

Electrical supply is connected to the compressor

terminals by Ø 4.8 mm (3/16") screws. The

maximum tightening torque is 3 Nm. Use a 1/4"

ring terminal on the power leads.

The compressor must be connected to earth

with the 5 mm earth terminal screw.

The Operating Control System (OCS) can

be supplied with 230V. For 230V OCS, earth

connection must be done with a 1/4" faston

terminal.

To avoid personal injury, earth continuity

must be checked before switching the power on.

Provide separate electrical supply for the OCS so

the heater remains energized when the machine

is out of service (eg seasonnal shutdown).

Winding resistance

Nominal voltage Voltage range

230V ~1 50/60Hz 207-254V ~1 50Hz - 180-254V ~1 60Hz

Wiring Connections

Danfoss Commercial Compressors

supply & connections

Customer supply or Danfoss Com-

mercial Compressors kit on request

Customer supply & connections

CAN-Bus (if manifolded)

MYK / GRS

Modbus

DGT sensor

LP sensor

HP sensor

Liquid Injection Valve (LIV)

M1 M2 control circuit

Surface Sump Heater

OCS power supply

Cover holding screws (x4)

Torque: 2.2 Nm

14 FRCC.PC.021.A5.02

Application Guidelines

Electrical data, connections and wiring

Communication connections

General wiring

information

In the case of parallel mounting, CAN-Bus cables

must link compressors together in order to

allow data exchange between compressors.

Connectors are 4 pole 3.5 mm pitch terminal

blocks.

In parallel mounting, only one HP transmitter

and one LP transmitter are needed per

compressor assembly, connected to only one of

the OCS, for the complete system.

If needed, the Modbus connection is to be

done with a 3 pole 3.5 mm pitch terminal block

(supplied on the OCS).

Shielded cables must be used for CAN-Bus and

Modbus connections.

A minimum distance of 10 cm between power

supply cables and communication cables

must be observed in order to avoid electronic

interferences and disturbances.

Accessory CAN-Bus cables are available for

tandem and trio assemblies (refer to accessories

list for code numbers).

Data readings and recovering can be done

thanks to a MMIGRS and a MMIMYK connected

on the RJ11 female connection on the OCS (refer

to section ”Data Management“).

MMIGRS and MMIMYK accessories are available

(refer to accessories list for code numbers).

The wiring diagrams below are examples for a

safe and reliable compressor wiring. In case an

alternative wiring logic is chosen, it is imperative

to respect the following rules:

M1 M2 contact on OCS must be used for

compressor protection (do not use Bus signal).

When a safety switch trips, the compressor must

stop immediately and must not re-start until

the tripping condition is back to normal and

the safety switch is closed again. This applies to

the LP safety switch, the HP safety switch, the

discharge gas thermostat and the motor safety

thermostat.

In specic situations, such as winter start

operation, an eventual LP control for pump-

down cycles may be temporarily bypassed to

allow the system to build pressure. But it remains

OCS connections The OCS comes preinstalled within the

compressor electrical box.

All needed connectors are plugged in place on

the OCS and connector positions are marked on

the transparent OCS protection cover.

The compressor comes with prewired OCS

connections for:

• discharge gas temperature sensor (DGT)

• surface sump heater (SSH)

• motor protection

• phase monitoring

• liquid injection valve (LIV)

Note that to avoid handling and transportation

issues, the discharge gas temperature cable is

not connected to the discharge temperature

sensor that is pre-installed on the upper shell.

This cable has to be connected to the sensor

before switching on the power.

Low pressure and high pressure transmitters

connection to the OCS are mandatory for

compressor operation (envelope monitoring),

refer to ”pressure transmitter accuracy and

range“ section.

LP and HP signals can also be transferred

via Modbus, refer to “CanBus and Modbus

communication with OCS“ section for further

information.

HP and LP sensor

connection

Shielded cable is mandatory for HP and LP sensor

connections. Cable shield must be connected on

sensor side only.

High pressure sensor connection Low pressure sensor connection

15FRCC.PC.021.A5.02

Application Guidelines

Electrical data, connections and wiring

Six dierent knockouts are available for power

supply or accessories connections.

One double knockout for power supply:

Ø 43.7mm/1.72" or Ø 34.5mm/1.36"

One triple knockout for power supply:

Ø40.5mm/1.59" or Ø32.5mm/1.27" or Ø 5.4mm/1"

Two double knockouts for accessories:

Ø 25.4mm/1" or Ø 20mm/0.78"

Two double knockouts for accessories:

Ø 22.5mm/0.88" or Ø 16.5mm/0.65"

The compressor terminal box according to IEC529 is IP54 for all models when correctly sized IP54

rated cable glands are used.

First numeral, level of protection against contact and foreign objects

5 - Dust protected

Second numeral, level of protection against water

4 - Protection against water splashing

Electrical box knock-out

dimensions

IP rating

The temperature inside the terminal box must

not exceed 65°C. Above 65°C, the OCS may not

operate properly. Any compressor damaged

related to this will not be covered by Danfoss

warranty.

Consequently, if the compressor is installed in an

enclosure, precautions must be taken to avoid

that the temperature around the compressor

and in the terminal box rise too much. The

installation of ventilation on the enclosure panels

may be necessary.

In the same manner, cables must be selected in

a way to insure that terminal box temperature

does not exceed 65°C.

Electrical box

temperature

Suggested wiring diagram

Legend

Fuses ...........................................................................................................F1

Compressor contactor ........................................................................ KM

Control relay ............................................................................................ KA

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

Optional short cycle timer (3 min) ............................................. 180 s

External overload protection .............................................................F2

Pump-down pressure switch .............................................................LP

High pressure safety switch ...............................................................HP

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

Liquid line solenoid valve ...............................................................LLSV

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

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

Thermistor chain ....................................................................................... S

Safety pressure switch ........................................................................LPS

mandatory for compressor protection to apply

an LP safety switch. The LP safety switch must

never be bypassed.

Pressure settings for the LP and HP safety switch

and pump-down listed in table from section

”Low pressure“.

When ever possible (ie. PLC control), it is

recommended to limit the possibilities of

compressor auto restart to less than 3 to 5 times

during a period of 12 hours when caused by

motor protection or LP safety switch tripping.

This control must be managed as a manual reset

device.

LPS

OCS

Wiring diagram with pump-down cycle

M1 M2

OCS

LPS

Control circuit

Wiring diagram without pump down cycle

M1 M2

16 FRCC.PC.021.A5.02

Application Guidelines

Approval and certications

PSH scroll compressors comply with the

following approvals and certicates.

Certicates are listed on the product datasheets:

http://www.danfoss.com/odsg

Approvals and

certicates

Pressure equipment

directive 2014/68/EU

Machines directive

2006/42/EC

Low voltage directive

2014/35/EU

Internal free volume

Electromagnetic

compatibility directive

2014/30/EU

PSH compressors with their OCS are in conformance with the requirements of the following

standards:

• EN61000-6-2: immunity for industrial environments

• EN61000-6-4: emission standard for industrial environments

CE 0062 or CE 0038 or CE0871

(European Directive)

All PSH models

(Underwriters Laboratories)

All 60 Hz PSH models

Other approvals / certicates Contact Danfoss

Products PSH051 to 077

Manufacturer's declaration of incorporation Contact Danfoss

Products PSH051 to 077

Declaration of conformity Contact Danfoss

Products Internal free volume without oil (litre)

PSH051 31.0

PSH064 32.6

PSH077 34.3

Products

PSH051 PSH0 64 PSH077

Refrigerating uids Group 2 Group 2 Group 2

Category PED II II III

Evaluation module D1 D1 H

Maximum / Minimum temperature - Ts -35°C < Ts < 52°C -35°C < Ts < 51°C -35°C < Ts < 51°C

Maximum allowable pressure (LP side) - Ps 31.1 bar(g) 30.2 bar(g) 30.2 bar(g)

Declaration of conformity Contact Danfoss

17FRCC.PC.021.A5.02

Application Guidelines

Operating conditions

R410A

POE oil

Motor supply

Compressor ambient

temperature

High ambient temperature

Low ambient temperature

PSH compressors are to be used with R410A refrigerant, with polyolester oil.

• R410A’s superior thermodynamical properties

compared to R22 and R407C refrigerants allow

for today’s massive – and necessary – switch to

high eciency systems.

• Zero Ozone Depletion Potential (ODP): R410A

doesn’t harm the ozone layer.

• Global warming potential (GWP): R410A shows

a relatively high warming potential. However,

the GWP index denotes direct warming eect,

which is relevant only in case of release to the

atmosphere.

A more accurate index is T.E.W.I., for Total

Equivalent Warming Impact, which takes into

account indirect contributions due to running

energy costs.

• Because of the higher system eciency it

allows to achieve, R410A is in this regard the best

refrigerant.

• As a near-azeotropic mixture, refrigerant

R410A behaves like an homogeneous substance,

whereas other zeotropic mixtures such as

R407C and other blends suer a temperature

glide during phase change that lessens thermal

eciency and makes them dicult to transfer

from a container to another.

• Reduced refrigerant mass ow, permitted by a

higher heat capacity, induce a lower sound level

of the installation as well as more compact and

lighter systems.

Polyolester oil (POE) is miscible with HFC's

(while mineral oil is not), but has to be evaluated

regarding lubrication ability in compressors. POE

oil has better thermal stability than refrigerant

mineral oil.

POE is more hygroscopic and also holds moisture

tighter than mineral oil. It also chemically reacts

with water leading to acid and alcohol formation.

PSH scroll compressors can be operated at

nominal voltages as indicated in the section

”Motor voltage“. Under-voltage and over-voltage

operation is allowed within the indicated voltage

ranges. In case of risk of under-voltage operation,

special attention must be paid to current draw.

PSH compressors can be applied from -35°C

to 51°C ambient temperature, when charged

with refrigerant. The compressors are designed

as 100% suction gas cooled without need for

additional fan cooling. Ambient temperature has

very little eect on the compressor performance.

In case of enclosed tting and high ambient

temperature it’s recommend to check the

temperature of power wires and conformity

to their insulation specication. In case of safe

tripping by the internal compressor overload

protection the compressor must cool down

before the overload will reset. A high ambient

temperature can strongly delay this cool-down

process.

Although the compressor itself can withstand

low ambient temperature, the system may

require specic design features to ensure safe

and reliable operation. See section ”Specic

application recommendations“.

Refrigerant and

lubricants

18 FRCC.PC.021.A5.02

Application Guidelines

Operating conditions

2 status LEDs are present on OCS:

LED 2 displays the motor protection status.

Compressor models PSH051-064-077 are

delivered with a pre installed motor protection.

This device provides ecient and reliable

protection against overheating, overloading as

well as phase loss/reversal.

The motor protection is eective thanks to PTC

sensors embedded in the motor winding and

OCS control. The close contact between sensors

and windings ensures a very low level of thermal

inertia.

The motor temperature is constantly measured

by a PTC thermistor loop connected to the OCS.

If any thermistor exceeds its response

temperature, its resistance increases above the

trip level (4,500 Ω) and the output relay then trips

– i.e. contacts M1-M2 are open.

After cooling below the response temperature

(resistance < 2,750 Ω), a 5 minutes time delay is

activated. After this delay has elapsed, the relay

is once again pulled in – i.e. contacts M1-M2

are closed. The time delay may be cancelled by

means of resetting the mains.

Compressor protection

Overheating/overloading

protection

LED1 (red) displays the

board general status

LED2 (yellow) displays the

motor protection status

LED1 displays the board general status with the following blinking codes







LED 2 Status display Blinking sequence Status



Continuous on Ready for starting





0.1secON/ 0.3secOFF

for 5 min 0.1secON/0,7secOFF.

ALARM 22: Motor overheating

ACTION: STOP COMPRESSOR

RESTART: 5min Delay after motor cooling.

LED 1 Status display Blinking sequence Status Reset



Continuous on OCS powered and stable NA



Slow blinking

1.5secON/1secOFF

Warning without requirement

for immediate action.

Come back to stable status

by automatic or manual reset.



Fast blinking

0.5secON/0.5secOFF

ALARM, requires

maintenance intervention

Come back to stable status

by specialist intervention

19FRCC.PC.021.A5.02

Application Guidelines

Operating conditions

Application envelope

The operating envelope for PSH scroll

compressors is given in the gure below, where

the condensing and evaporating temperatures

represent the range for steady-state operation.

The operating limits serve to dene the

envelope within which reliable operations of the

compressor are guaranteed:

• Maximum discharge gas temperature:

+140°C (measured by DGT sensor),

• A suction superheat below 5 K is not

allowed due to the risk of liquid ood back,

• Maximum suction superheat of 20K

• A subcooling above 5K is recommended to

ensure proper liquid injection.

• Minimum and maximum evaporating

and condensing temperatures as per the

operating envelopes.

Use a phase meter to establish the phase

orders and connect line phases L1, L2 and L3

to terminals T1, T2 and T3, respectively. The

compressor will only operate properly in a single

direction, and the motor is wound so that if the

connections are correct, the rotation will also be

correct.

OCS provides protection against phase reversal

and phase loss at start-up.

Apply the recommended wiring diagrams from

the section ”Suggested wiring diagram logic“.

The circuit should be thoroughly checked in

order to determine the cause of the phase

problem before re-energizing the control circuit.

The phase sequencing and phase loss

monitoring functions are active during a 5

seconds window 1 second after compressor

start-up (power on L1-L2-L3)

Phase sequence and

reverse rotation

protection

Condensing temperature (°C)

-10

-35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 2

Evaporating temperature (°C)



LED 2 Status display Blinking sequence Status



0.2secON/0.2secOFF

0.2secON/0.4secOFF

ALARM 25 :Phase reverse error

ACTION: STOP COMPRESSOR

RESTART: Come back to stable status by manual reset



0.5secON/0.5secOFF

ALARM 24 :Phase loss error

ACTION: STOP COMPRESSOR

RESTART: Come back to stable status by manual reset

20 FRCC.PC.021.A5.02

Application Guidelines

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Danfoss scroll PSH051 to 077 serie - GB - SI User guide

Danfoss scroll PSH051 to 077 serie - GB - SI User guide

Danfoss scroll PSH051 to 077 serie - GB - SI User guide

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